Everyday exists: what UK bookmakers actually pay existing customers

Updated October 2026

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Snapshot date: 27 October 2026 · Operator licences and offers checked against the Gambling Commission’s public register and each operator’s own published terms.

The “free bet” and the “100% bonus” get the airtime. What they cost the punter is the smaller print, and that is what this page works through. Since 19 January 2026 a hard ceiling has sat on top of that print: a wagering requirement above ten times the bonus is no longer permitted at any operator the Gambling Commission licenses. That single rule changes what “best” can mean in a comparison. An offer with a 30x turnover no longer exists in this market, so the table below is not a hunt for the biggest headline; it is a read on what each operator still puts in front of an existing customer and what the conditions underneath it actually take back.

The ten operators ranked here all hold a remote operating licence from the Gambling Commission for Great Britain, the regulator under the Gambling Act 2005 that licenses the entire commercial market. Every one of them sits on the Commission’s public register, every one takes part in GAMSTOP, and every one verifies a customer’s name, address and date of birth before the first deposit. Those are the floor, not the differentiator. The differentiator is what each of them does once a customer is past the welcome and into the long second year.

The fundamentals: what an “existing customer offer” actually is

Once a welcome bonus has been claimed and played through, an existing customer offer is the second menu the bookmaker opens to keep the account active. It is not one shape; it is a family of shapes, and the shapes have different prices. The familiar ones are:

• Free bets — a token credited to the account that can be staked on a market. The stake is usually not returned with the winnings, so a £10 free bet at evens returns £10 of profit, not £20. The token has an expiry, a minimum odds floor, and sometimes a maximum stake per market.
• Enhanced odds / price boosts — a one-off price lift on a chosen selection, sometimes only for new customers and sometimes for both. The boost applies to the return; the stake is paid back as usual because the bet is placed with cash, not a token.
• Acca insurance — a refund, usually as a free bet, if one leg of a multiple lets the customer down. Refunds almost always come with conditions: minimum number of legs, minimum combined odds, a cap on the refund amount, and a short window in which the bet must be settled.
• Acca boost / profit boost — a percentage added to winnings on qualifying accumulators, paid in cash, with a ceiling on the bonus and a minimum number of legs.
• Free-to-play games and prize draws — score-prediction contests and similar, with no entry fee and a fixed prize pool. These cost the bookmaker less and cost the punter less in turnover, so the headline value can dwarf the real value.
• Loyalty schemes — tiered reward points that convert to free bets or cash. The conversion rate and the markets on which the points can be earned are the load-bearing detail.

The point of separating the shapes is that they do not cost the same. A free bet has an expected value that depends on the odds used and the market margin. An enhanced odds offer is closer to a price discount. Acca insurance has a probability of paying out and a probability of the bonus being clawed back at the conditions. Conflating them — “£30 of free bets and a profit boost and acca insurance” — adds up to a number that means nothing, because the shapes convert to cash through different routes at different speeds.

A second thing that matters and is easy to miss: the bookmaker’s margin sits inside every price the operator offers, regardless of any promotion layered on top. The bonus or the boost does not buy the punter a lower-margin market; it buys an extra return on a market whose margin is unchanged. A 5% margin on a boosted price is still a 5% margin. The arithmetic of that is unpacked in the working sections below, but it is the one fact to carry through the whole page: nothing on the operator’s promo page is free of the underlying price the bookmaker has set.

The landscape: why the comparison looks the way it does in 2026

The 19 January 2026 promotion rules did two things. They capped wagering requirements on bonuses at 10x — a £10 bonus with a 50x turnover is no longer permitted, and the same £10 at the cap needs no more than £100 of qualifying bets — and they banned mixed-product offers that require a customer to gamble on more than one product type, for example “bet on football to get free spins”. The first change killed off the heaviest-wagering welcome offers; the second change killed off the cross-sell packages that bundled betting and casino credit.

The cap applies to bonuses with a wagering condition. Whether it covers free bets that have no wagering condition at all — a token credited and usable on a market with no turnover attached — is not established, and a punter who wants to know where a specific offer sits has to read the operator’s own terms. That distinction is the one place on a promotional page where reading carefully pays.

What is left, broadly, is a market where the welcome offers are now short by historical standards, the existing customer offers are more reliant on price boosts and acca insurance than on wagering bonuses, and the headline numbers are smaller but the conditions are cleaner. A punter comparing the existing customer offers in 2026 is not comparing apples and oranges in the same way that a comparison in 2022 or 2023 was; the heaviest apples have been removed from the shelf.

The statute: who licenses these operators and what the licence means

The Gambling Commission, the non-departmental public body that licenses the commercial gambling market in Great Britain under the Gambling Act 2005, is the regulator on whose public register every operator below appears. Since the Gambling (Licensing and Advertising) Act 2014 any operator whose remote facilities are used in Great Britain has to hold a Commission licence, no matter where the operator itself is based. A licence issued by Malta, Gibraltar or Curaçao is not a substitute. The brands below are operated by companies in the United Kingdom, Gibraltar and Malta, but the licence that authorises them to take bets from customers in Great Britain is the Commission’s.

Two licence categories matter most for the brands on this page. Remote general betting standard (real events) is the standard sportsbook licence. Remote betting intermediary is the category for betting exchanges, where customers back and lay against each other and the platform takes a commission rather than a margin on prices. One operator on this page sits in the second category; the rest sit in the first.

The Commission’s public register can be searched by business name, trading name, domain or account number, and it is the only place that registers whether a brand holds a licence. The domain proves nothing — licensed operators use .com as well as .co.uk. The licence number on the register is the verification; an account number without the licence prefix, or a number that does not appear in the search at all, is the warning sign.

Identity verification is part of the licence. Since 7 May 2019 every customer has had name, address and date of birth verified before a deposit or a bet, and that covers free bets and bonuses too. There is no anonymous play at a licensed site, and there has not been for several years. That is the reason the onboarding flow at every operator below asks for the same documents and runs the same kind of check. A punter who wants a quick anonymous account will not find one in the table that follows.

Northern Ireland sits outside the Gambling Act 2005 and has its own older legislation. A “GB-licensed” or a “Great Britain licence” applies to England, Scotland and Wales and not to Northern Ireland. None of the brands below holds a Northern Ireland licence; no separate licensing framework is currently in operation.

What follows for the punter: a financial vulnerability check, and what triggers it

The Commission introduced a financial vulnerability check in 2024. The test is built into the operator’s flow once a customer’s net deposits across the rolling 30 days clear £150. At that point the operator runs a public-record check for markers of financial difficulty — bankruptcy, county court judgments and the like. The check is not a credit reference check and it is not an income check; it is a public-record pass that may prompt the operator to ask further questions about source of funds. The £150 threshold is the trigger; once crossed, the punter can expect a softer process.

A second, more thorough financial risk assessment has been announced in stages. The Commission’s own article of 7 July 2026 set out the framework, with no start date. Until that start date is published and brought into force, the £150 vulnerability check is the only financial behaviour change a customer at a licensed operator will meet, and even that stops short of an affordability conversation most of the time.

No statutory ceiling exists on what a customer can deposit or lose. The limits a punter sees are the punter’s own choices, set in the safer-gambling section of each account. An operator may impose a stake limit on a particular bet, particularly on a heavily-promoted market, and may restrict a customer who is winning at full go — but that is the operator’s commercial discretion, not a regulatory cap. There is no Daily Deposit Limit set by the state, and a comparison that quotes one is comparing with a number that does not exist.

The other operator-side obligation worth naming is the gross deposit limit under the Commission’s Remote Technical Standards. Operators must offer a deposit limit on a fixed time frame, with the first phase in force since 31 October 2025 and a second phase scheduled for 30 September 2026. Whether that second phase is in effect at the moment a punter reads this page is not established; the operator’s own safer-gambling page is the live answer, not this one.

Safer gambling and where help sits

Every operator on this page is a member of GAMSTOP, the national multi-operator self-exclusion scheme that has been a mandatory licence condition for online operators since 31 March 2020. A self-exclusion can run for six months, one year, five years, or five years with auto-renewal, and after the minimum period the exclusion stays in place for a further seven years unless the customer asks GAMSTOP to remove it. GAMSTOP covers online sites and apps; betting shops use a separate in-shop self-exclusion process. The scheme is the only way one exclusion closes to every GB-licensed operator at once.

Help that does not depend on which operator a punter uses:

• GamCare, which runs the National Gambling Helpline. Telephone, live chat and online forums.
• GambleAware, the education and treatment commissioning body funded by a statutory levy on the industry.
• NHS gambling clinics, regional and online, offering cognitive behavioural therapy and longer-term treatment.
• Gamblers Anonymous, the peer-support fellowship.

If a punter wants a single first step, the National Gambling Helpline is the one to call. The number is on the GamCare site and is reachable from any phone in Great Britain without charge.

Incentives: how bonuses, free bets and the bonus cap work

The arithmetic that makes a bonus worth what it says, or worth less, has four inputs: the bonus amount, the wagering requirement (how many times the bonus has to be staked before it becomes withdrawable cash), the minimum odds each qualifying bet has to be at, and the expiry. The free-bet shape has the same inputs with one change — there is no wagering requirement, but the stake is not returned with the winnings.

What a wagering requirement costs

Take a bonus amount B and a wagering factor F. The required turnover is the product of the two. On a £20 bonus with a 5x wagering factor, turnover is £100 — twenty pounds staked five times across qualifying bets. The same £20 at the old 30x ceiling was £600 of qualifying bets; under the current 10x cap, no qualifying bonus can demand more than £200 of bets for a £20 bonus. That is the headline effect of the 19 January 2026 rules: the heaviest bonuses are gone.

The minimum odds filter decides which bets count toward that turnover. A bookmaker that sets the minimum at 1/2 (1.50 decimal) accepts almost any bet toward the turnover; one that sets the minimum at 5/1 (6.00 decimal) forces the punter onto longer-priced selections, where the variance is higher and the implied probability of each bet winning is lower. A higher minimum odds floor is, on average, more expensive per unit of turnover than a lower one, because the underlying probability of each bet clearing is smaller. Two offers with identical bonus amount and identical wagering factor can cost very different amounts to clear if their minimum odds differ.

The expiry decides how quickly the turnover has to be done. A seven-day expiry on a £100 turnover with five qualifying bets a day is comfortable; the same turnover on a 48-hour expiry with a small deposit is not. Expiry also interacts with the minimum stake: a punter who cannot afford many qualifying bets has to plan the betting around the deadline.

There is one number that is the average cost of clearing a bonus, and that is the market margin of the bets used to do it. If the punter plays through turnover on a market with a 5% margin, the expected cost of clearing is 5% of turnover. The punter does not see this number on the bonus page; it sits underneath the page. It is the reason that two offers with identical headline amounts and identical wagering factors can still pay out differently in practice — one punter’s bets go through a 4% market, another’s through a 6% market, and the difference is £2 per £100 of turnover. The point is that the bonus is not a free lunch: the bookmaker’s margin is still being paid.

What a free bet is worth

For a free bet whose stake is not returned, the expected value at the moment it is credited is the free-bet amount multiplied by the difference between the odds and 1, divided by the odds, and then multiplied by the payout share of the market it is used on. On a £10 free bet staked at decimal odds of 3.00, the gross expected return is £10 × (3.00 − 1) ÷ 3.00 = £6.67. If the market’s payout share is 95%, the net expected return of the free bet is around £6.33. That is what the £10 free bet is worth on average; it is not what the free bet wins on any given day. A punter who places a free bet at 1.5 chances return expects £3.33, with a payout share of 84% at the operator’s margin reducing it to around £2.80.

The stake-not-returned detail is the load-bearing one. A free bet is not a £10 cash bet; it is a £10 bet that returns £10 × (odds − 1) if it wins, and £0 if it loses. The marketing word “free” obscures the distinction. The expected-value calculation makes the distinction concrete.

A free bet also has conditions. Minimum odds floors apply, maximum odds caps sometimes apply, expiry is short, and certain markets are excluded. QuinnBet’s free bets, for instance, are usable on any market at odds of 1/2 (1.50 decimal) or greater, with maximum odds of 50/1, and acca permutations such as Trixies, Patents and Yankees are excluded while straight accumulators are allowed. The combination of “any market” and “no permutations” is a common shape; it forces the free bet onto singles and ordinary multiples, which settle fast and let the bookmaker avoid the longer cycle of a multi-leg permutation bet.

The 10x cap, in practice

The 10x cap applies to bonuses with a wagering condition. It is not a cap on the headline amount of a bonus; a £500 bonus at 1x turnover is still permitted, because £500 × 1 = £500 is at or under the £5,000 ceiling the cap implies on a 10x basis. The cap does not standardise what operators offer. It caps the worst of what used to be on offer.

A reader who wants a worked number: the calculation in the next section takes an offer from one of the brands ranked below and walks it through to the cost of clearing. The condition that turns a number into a cost is the market margin of the bets the punter runs through.

Worked calculation: what clearing the Coral welcome bonus would cost, under the current rules

The article provides a worked example of how to read offer terms. The offer used is Coral’s sports welcome of £40 in free bets for a £20 qualifying sports bet at minimum odds of 2.0 (1/1), with the free bets issued within 7 days of the qualifying bet settling and expiring 7 days after they are issued. The qualifying bet is at the bookmaker’s margin; the free bets, once credited, are at the bookmaker’s margin. The 10x bonus cap applies to bonuses with a wagering condition; a free bet with no wagering condition falls outside the cap on a plain reading of the rule.

The question the calculation answers is: what is the £40 free bet worth on average? The formula is the free-bet value one:

• Free-bet amount: £40.
• Decimal odds used for the free bet: assume the punter uses the free bet at decimal odds of 3.00 (a representative mid-range price).
• Market payout share: assume 95%, which corresponds to a 5% bookmaker margin on the market the free bet is used on.

Plugging these in: £40 × (3.00 − 1) ÷ 3.00 = £26.67 of gross expected return from the free bet. At a 95% payout share the net expected return is around £25.33. That is the £40 free bet’s expected value on the stated assumptions. It is not what the free bet pays on any single day.

If the same free bet is used at shorter odds — 1.50 decimal — the gross expected value falls to £40 × (1.50 − 1) ÷ 1.50 = £13.33, and the net expected value at 95% payout share is around £12.67. The punter who uses a free bet at the minimum odds floor gets less of the headline amount back in expectation than the punter who uses it at a longer price. The marketing line “free bet” does not advertise that curve.

The result is a band rather than a single figure, because the market margin varies by event and the chosen odds vary by punter. On a 4% market, with the free bet used at decimal odds of 4.00, the net expected return rises to around £28.80. On a 6% market at decimal odds of 2.00, it falls to around £18.80. The £40 headline is £40, but its realised value is closer to £13–£29 depending on how it is spent. The condition is “use it at a price long enough to make the expected value meaningful, on a market tight enough that the bookmaker’s margin is not eating the return”. That is the only practical advice that the arithmetic permits.

How to read the comparison below

Each operator block has the same four pieces. The first is who licenses the operator and under what account number, because that is the floor on which the rest of the block stands. The second is the headline shape of the existing customer offer — a free bet, a price boost, acca insurance, an acca boost, a points scheme — and the conditions attached to it. The third is the one detail that would change a punter’s mind, positive or negative: a higher maximum payout, a tighter minimum odds floor, a longer expiry, a quirk of the platform. The fourth is the verdict, which is this page’s judgement and not a recommendation.

Important concepts for every reader to keep in mind across every block include minimum odds. The minimum odds at which a free bet is usable, the minimum odds at which an acca insurance pays out, the minimum odds at which an acca boost activates — these are the conditions that change the cost of the offer. A headline number on its own, without the minimum odds, is not a comparison.

The comparison table below carries the same set of fields in compact form. Each table cell carries what the operator’s own page or app-store listing states; the operator’s terms page is the reference for any specific number.

Comparing the operators

The table is a snapshot. Where a cell is left empty, the operator’s own terms are the source and the verification.

The table is a map, not a verdict. The blocks that follow are where the differences between operators become concrete.

Kalooki Sportsbook

Kalooki Sportsbook is operated by Kalooki Sportsbook Limited (company number 12938274), licensed by the Gambling Commission under account number 57730, and is a GAMSTOP member. The operator advertises instant withdrawals by bank transfer within minutes, Best Odds Guaranteed on UK and Irish horse racing, in-play betting, daily boosts and extra place races. Best Odds Guaranteed is the headline existing-customer offer: the bookmaker matches the starting price if the latter is higher than the price taken when the bet was placed, and the extra place races extend each-way place terms on selected fields.

The single detail a punter should check before claiming is the maximum stake on the daily boosted markets. Kalooki’s boosts are marketed with maximum-stake limits, and a £10 stake cap on a boost that would otherwise pay out four or five times the odds is the practical limit on what the boost is worth. The brand is a smaller operator than the market leaders, and the terms can shift quickly; reading the boosted market page in the app at the moment of betting is the live verification.

Verdict. For a punter whose betting is concentrated on UK and Irish racing and who values instant withdrawals on the small-stake side, Kalooki is a useful second account. The Best Odds Guaranteed offer is the workhorse; the daily boosts are the sweetener. The platform’s smaller scale cuts both ways: less liquidity on the bigger international football markets, but a tighter set of existing customer promotions than the larger brands run.

Midnite

Midnite’s UK site cites Gambling Commission licence 101839 and presents in-play events, an acca builder, popular accas and price boosts with maximum-stake limits. The platform is built on the acca: the acca builder, the popular-accas feed, the daily price boosts and the maximum-stake caps together form a single product shape aimed at the accumulator punter. The existing customer offer is the daily boost catalogue, and the single condition that defines what the boost is worth is the maximum stake per market.

The verification path here runs through Midnite’s own site, where the licence number is shown on the home page. The Commission register is the second check.

Verdict. Midnite is a credible home for a punter whose betting is multiple-leg football. The daily boost catalogue is the reason to have the account open; the maximum-stake caps are the reason not to over-commit on a boosted market. For a single-bet punter, the platform offers less than the bigger books.

Unibet

Unibet states it has operated since 1999 and its UK site is run by Platinum Gaming Limited, Gibraltar, under Gambling Commission account 45322. The sports welcome offer is “Get £40 in Free Bets when you bet £20” — a deposit and sports bet of £20 or more at minimum odds of 2.0 (1/1), with the free bets expiring within 7 days of issue, for new GB customers using a debit card or instant bank transfer. The existing customer offer is the daily Uniboost catalogue, live streaming through Unibet TV, Best Odds Guaranteed on horse racing, in-play betting and Cash Out on thousands of markets.

The Uniboost catalogue is broad. Unibet runs boosts across football, horse racing, tennis and the bigger US sports; the boost on a particular event is published in the app at the time, and the maximum stake per boost varies. The 7-day expiry on the welcome free bets is a common market feature that concentrates the value into a tight window.

Verdict. Unibet is a strong all-rounder. The platform offers the widest catalogue of existing customer boosts of any brand on this page, the live streaming is a real differentiator, and the Cash Out coverage is broad. For a punter who wants one account that runs the full set of products — racing, football, in-play, acca — Unibet sits near the top of the shortlist.

Coral

Coral’s sports welcome offer is “Get £40 in Free Bets when you bet £20”: a deposit and sports bet of £20 or more at minimum odds of 2.0 (1/1), with £40 in free bets issued within 7 days and expiring 7 days after issue, for new GB customers who opt in. The existing customer offer is the daily Reward Shaker (a free daily prize that may be a free bet, a casino bonus or a free-to-play token), an Odds Booster on hundreds of markets and free-to-play games such as Football Super Series with a £10,000 jackpot. The welcome offer must be qualified with a debit card or instant bank transfer; the operator lists Apple Pay, Visa, Visa Electron, Mastercard, Revolut Pay, Google Pay, TrueLayer, Earthport and Trustly among its payment options.

The Reward Shaker’s mixed-product shape is worth examining. The shaker’s contents can include casino credits and free spins, which under the post-19 January 2026 rules would not be allowed as the headline of a sports promotion that required cross-product play. The shaker’s structure avoids that restriction by presenting the casino credits as a free prize from a free-to-enter game rather than as a sports promotion that requires cross-product play; the punter who values a single-product offer can ignore the non-sports prizes.

Verdict. Coral is the broadest existing customer offer on this page in terms of the daily products a punter can interact with. The Reward Shaker is the differentiator; the Odds Boost catalogue is the workhorse. For a punter who values daily engagement, the brand earns a place in the comparison. For a punter who wants a single clean free bet per week, Coral is noisier than some of the smaller brands.

BoyleSports

BoyleSports’ sports welcome offer for UK players is £20 in free bets when a £10 bet is placed (€30 in free bets for a €10 bet for Irish players). The existing customer offer is built around Acca Insurance and Acca Loyalty. Acca Insurance requires opt-in, a minimum stake of £5, minimum odds of 1/2 and pays a maximum refund of £20 as a free bet that expires in 7 days; bets must be placed and settled on the same day. Acca Loyalty requires opt-in, a £5 minimum stake, minimum combined odds of 3/1 and 5 or more settled legs, with a free bet expiring after 7 days.

Regarding Acca Loyalty, the combination of minimum odds and minimum number of legs is significant: 5 legs at combined odds of 3/1 is a floor that turns the offer into a real condition rather than a marketing line. The 7-day expiry on the refund free bet is standard for this type of promotion.

Verdict. BoyleSports is the strongest of the brands on this page for a punter whose betting is accumulator-shaped. The Acca Insurance offer pays out often enough to be a real backstop on a tight multiple; Acca Loyalty pays out less often but the payout is larger. For a punter who bets singles or doubles, the platform offers less than the bigger books.

Sky Bet

Sky Bet’s welcome offer for new customers is £30 in free bets, credited as three £10 free bet tokens after a deposit of at least £5 and a first single or each-way bet of at least 5p at odds of 1/1 or greater. The existing customer offer is the free bet club and the daily price boost catalogue. The 5p minimum qualifying stake is the unusual feature: a punter can qualify for the welcome at almost zero cost in expectation terms, although the £5 deposit is the load-bearing part of the qualifier. The free bet tokens expire on a published schedule and the platform runs price boosts daily across football and horse racing.

The token structure of the welcome should be considered. Three £10 tokens is functionally the same as a single £30 free bet for a punter who will bet on football, football, football; it is meaningfully different for a punter who would prefer one £30 free bet on a longer-priced selection. The free bet club pays out free bets based on a weekly staking threshold.

Verdict. Sky Bet is a strong fit for a punter who bets small stakes regularly. The 5p welcome qualifier and the free bet club reward the small-stake customer in a way most brands do not. For a high-stake punter, the same offers feel less generous.

BetTom

BetTom’s sports welcome offer is 50% back as a free bet of up to £50, with a matching 50% back up to £50 as free slot funds for casino play. The matching casino credit is presented alongside the sports free bet, and the punter who wants the sports offer alone needs to read the terms carefully because the cross-product shape of the welcome is exactly the structure the Commission’s 19 January 2026 rules address. The full terms of the welcome and the existing customer offers apply, and the operator runs daily in-app boosts.

The cross-product structure is a consideration. The Commission’s rules ban a mixed-product promotion that requires gambling on more than one product type; the welcome as described bundles a sports free bet with casino slot funds, and the punter who values the sports free bet alone has to check whether claiming the welcome requires engaging the casino credit.

Verdict. BetTom is worth a look for a punter who plays both sports and casino. The 50%-back shape on both products is generous if used. For a sports-only punter, the welcome is less compelling than a single-product offer of equivalent headline value.

Dabble

Dabble’s welcome offer is “Bet £10, Get £10 in Free Bets” on a first deposit for new customers, with minimum odds applying, a 7-day free bet expiry and the stake not returned. The platform is built around a social feed: customers can follow other punters, copy their bets and engage with the platform’s chat. The existing customer offer is a stream of free bet tokens and weekly promotions distributed through the social feed, with the platform’s mechanics making the offer structure visible to followers rather than buried in a terms page.

The stake-not-returned condition on the welcome free bet affects how a punter calculates the expected return. The £10 free bet wins £10 × (odds − 1) on a win; the stake is not credited back alongside. The 7-day expiry is a standard market duration.

Verdict. Dabble is a different shape from the rest of the page. The social feed is the product; the promotions ride the feed. For a punter who values the social layer, the platform earns a place. For a punter who wants a clean sportsbook without the feed, Dabble is less of a fit.

Sporting Index

Sporting Index’s new-customer offer is a £10 fixed-odds bet at minimum odds of 1/2 that unlocks three £10 fixed-odds free bets, three £5 Total Goals spread bets, three £5 Winning Favourites spread bets and a £1 Race Index spread bet; the qualifying bet cannot be placed in play or cashed out early. The existing customer offer is the spread-bet free bets that follow from a regular qualifying fixed-odds stake, with the spread bets usable across Sporting Index’s spread betting markets.

Regarding the mix of fixed-odds and spread-bet free bets in the welcome, note that spread betting on sports at Sporting Index is not the same product as fixed-odds betting on sports at a traditional bookmaker: a spread bet wins or loses per unit of distance from the spread, and losses on a spread bet can exceed the stake. The financial-spread side of the business is regulated by the Financial Conduct Authority, not by the Gambling Commission; the sports-spread side is regulated by the Commission. The punter who wants only fixed-odds free bets should ignore the spread-bet components.

Verdict. Sporting Index is the right home for a punter who already understands spread betting and wants the spread-bet free bets alongside the fixed-odds product. For a punter who has never placed a spread bet, the platform offers a less clean entry than a pure fixed-odds bookmaker.

Copybet

Copybet’s Acca Booster pays up to a 100% cash bonus on accas of at least 3 selections, and it offers up to a 15% Daily Profit Boost. The acca shape is the load-bearing detail: a 100% cash bonus on a winning acca of 3 or more legs doubles the winnings on a winning bet, paid in cash that can be withdrawn. The Daily Profit Boost adds a further percentage to winnings on qualifying bets. Both boosts are paid in cash rather than as free bets, which is the meaningful distinction: a cash boost adds to withdrawable balance, while a free bet token carries the stake-not-returned condition.

The cash-versus-free-bet distinction is important. The Acca Booster’s cash payout differentiates it from most of the rest of the comparison. The minimum number of legs (3) is the floor on the offer.

Verdict. Copybet is the strongest acca-booster offer on this page for a punter whose betting is multiple-leg. The cash payout makes the offer cleaner than a free-bet boost of equivalent headline value. For a single-bet punter, the platform offers less than a bookmaker with a broader free-bet catalogue.

QuinnBet

QuinnBet’s free bets are valid for 7 days from credit and can be used on any market at odds of 1/2 (1.5) or greater, with maximum odds of 50/1; straight accumulators are allowed but Trixies, Patents and Yankees are not. The 7-day expiry is on the shorter side of the market, and the maximum odds cap is the unusual condition — a free bet usable at odds between 1.50 and 51.00 decimal is a constrained token. The acca permutation exclusion is also a constraint: a punter who would have used a free bet on a Lucky 15 or a Heinz cannot, and has to fall back to a straight accumulator.

The combination of maximum odds and permutation exclusion is a key detail. The 50/1 cap means the token cannot be used on a longshot single. The permutation exclusion means the token cannot be used on a multi-leg permutation bet, even if all the legs qualify individually.

Verdict. QuinnBet is a clean fit for a punter whose existing-customer free bets are placed as straight accumulators on the football markets. For a punter who would use a free bet on a longshot single or a Lucky 15, the platform’s restrictions make the token less flexible than a competitor’s.

10bet

10bet advertises a 100% up to £50 betting bonus for UK sign-ups, plus daily free bets and free spins. The welcome bonus is a deposit-match bonus with a wagering condition; the daily free bets and free spins are the existing customer offers. The 10x bonus cap applies to the wagering requirement on the welcome bonus, and the punter who claims the welcome needs to read the wagering factor and minimum odds on the terms page.

Regarding the cross-product shape of the welcome (sports bonus plus casino free spins), keep the Commission’s rules in mind. The 19 January 2026 rules ban mixed-product promotions that require gambling on more than one product type; the welcome as described bundles sports and casino, and the punter who wants the sports bonus alone has to check the terms carefully.

Verdict. 10bet is a credible mid-market choice. The 100%-up-to-£50 welcome is in line with the market after the 10x cap, and the daily free bets reward regular play. For a punter who plays both sports and casino, the welcome is more attractive than for a sports-only punter.

Smarkets (SBK)

Smarkets runs the SBK sportsbook, whose UK welcome offer is a £20 first deposit and £20 bet at minimum odds of 3.0 for £60 in free bets within 48 hours, with Cash Out, Bet Builder and live horse racing streams. The exchange side of the business (Smarkets) is a betting intermediary; the SBK sportsbook is a traditional bookmaker operating under the same licence. The existing customer offer is the daily boost catalogue and the Cash Out coverage; the live horse racing streams are the differentiator.

The 3.0 minimum odds on the welcome qualifier is a specific condition. The 3.0 floor is higher than most competitors’ 2.0 floor, and a punter who would have placed the qualifying bet on an evens selection cannot use this welcome. The £60 in free bets for a £20 qualifying bet is generous if the punter can place the qualifier at the required price.

Verdict. Smarkets is the right home for a punter who values the exchange product and wants a sportsbook alongside it. The SBK platform’s live racing streams and Cash Out coverage are the differentiators. For a punter who would have placed the welcome at evens, the platform’s qualifier rules the welcome out.

bet365

bet365 offers Bet Builder+ (combining markets from one event into a single bet, available pre-match and in-play), Super Boosts, Winnings Boosts on Bet Builders and selected singles, and daily Bet Boosts. The platform is one of the deepest sportsbooks in the market, and the existing customer offers are the daily Bet Boost catalogue and the Bet Builder+ product. The Commission’s public register shows bet365 trading under a Commission account as listed in the comparison table.

The breadth of the Bet Builder+ product is a significant factor. Combining markets from one event into a single bet — including in-play — is a product shape that only the largest books run at scale, and the maximum stake per Bet Builder+ market is the practical limit on what the bet pays out.

Verdict. bet365 is the strongest generalist sportsbook on this page. The market depth, the in-play coverage and the Bet Builder+ product combine to make it the right home for a punter whose betting runs across multiple sports and multiple bet shapes. The existing customer offers are the workhorse rather than the headline: a punter who values the daily boost catalogue is well-served, and a punter who wants a punchy headline free bet may find the welcome less prominent than at a competitor.

William Hill

William Hill’s Football Acca Boost covers accas of 2 or more legs with each selection at 1/5 or bigger, with a boost from 3% on a double up to 200% on 20 or more legs, a maximum boost of £10,000 per online bet, and runs until 30 May 2027. The acca boost is paid in cash on winning bets, and the maximum boost ceiling of £10,000 per bet is the highest single-bet boost cap on this page. The 1/5 minimum odds per leg is on the lower side of the market and makes the boost easy to qualify for.

The single detail a punter should note is the 30 May 2027 end date on the Football Acca Boost. The offer is a published promotional period rather than a permanent feature, and the platform’s terms page is the live verification of whether the offer is still in effect on the date the punter reads this.

Verdict. William Hill is a strong fit for an acca punter. The 1/5-per-leg minimum odds is the lowest floor on this page, the 200% boost ceiling on 20+ legs is the highest ceiling, and the cash payout makes the offer cleaner than a free-bet boost. For a punter who bets singles, the platform offers less than the free-bet specialists.

BetVictor

BetVictor offers regular price boosts, acca offers and free bets on selected events, with welcome offers shown in the app and governed by its customer terms and conditions. The platform is a long-established brand with a deep sportsbook, and the existing customer offer is the daily price boost catalogue and the acca offers. The exact headline values of the existing customer offers are not listed here; the operator’s own app and terms page carry the live figures.

Verdict. BetVictor is a credible all-rounder with a long-established platform. For a punter who wants a deep sportsbook and a regular boost catalogue, the brand earns a place. For a punter who wants the headline free bet or acca boost at the top of the comparison, the platform’s existing customer offers are quieter than some competitors’.

Spreadex

Spreadex is regulated by the FCA for spread betting and by the Gambling Commission for fixed-odds betting, and the operator states that spread betting losses can exceed the deposit. The new customer offer is £60 in free bets for a £10 fixed-odds bet, with the free bets usable across fixed odds and spread betting; the qualifying bet must be placed within 28 days of opening the account and is at minimum odds of 1/2. The Acca Boosts pay a cash boost from 5% up to 100% on football accumulators of three or more selections, depending on the number of legs. The financial-spread side is regulated by the FCA, the sports side by the Commission.

The single detail a punter should note is the FCA/Commission split. A punter using Spreadex for financial spread betting is on the FCA-regulated side; the same punter using Spreadex for fixed-odds sports betting is on the Commission-regulated side. The free bets span both sides, and the punter who uses a free bet on a financial spread market is using a Commission-issued free bet on an FCA-regulated product.

Verdict. Spreadex is the right home for a punter who wants both fixed-odds and spread-betting on one account. The 28-day qualifying window is the longest in this comparison, and the £60 free-bet headline for a £10 qualifier is the highest ratio on the page. For a punter who would not use the spread-betting product, the free-bet flexibility is less relevant.

Kwiff

Kwiff’s Supercharge feature can instantly boost the odds on a bet, for example from 2/1 to 20/1, and it can apply to single or multi bets on any sport. The platform offers Bet Builder and Bet Builder+ (combining Bet Builder bets from different games) and a guaranteed weekend acca boost. The Supercharge feature is the differentiator: the odds on a selected bet can be multiplied after placement, with the boost triggered by the platform’s own rules.

The single detail a punter should note is the trigger condition on Supercharge. The boost is not advertised in advance on every bet; it is triggered by the platform after placement, and the punter who places a bet expecting a boost may not get one. The weekend acca boost is the predictable part of the offer; the Supercharge is the surprise.

Verdict. Kwiff is the right home for a punter who values the surprise element of a Supercharge boost. For a punter who wants a predictable boost on every acca, the platform’s weekend acca boost is the workhorse. For a punter who wants the deepest sportsbook, Kwiff sits behind the larger books.

Star Sports

Star Sports offers pre-event and in-play markets with Bet Boosts, Daily Specials and Weekend Enhanced Boosts, plus in-play betting on football, horse racing, golf and US sports. The platform is a smaller-scale sportsbook than the market leaders, and the existing customer offer is the daily boost catalogue and the in-play coverage on the bigger US sports.

Verdict. Star Sports is a credible second account for a punter whose betting is concentrated on UK racing or US sports. For a punter who wants the deepest sportsbook, the platform sits behind the larger books.

DAZN Bet

DAZN Bet offers Cash Out, Bet Builder, daily bet boosts and in-play betting; cash out availability is not guaranteed and bets stand if it is unavailable. The platform provides deposit limits, loss limits and wagering limits as safer gambling tools. The Cash Out caveat is the single detail a punter should note: a bet that the punter wants to cash out is not guaranteed to be cashable, and the bet stands if the platform’s Cash Out is unavailable.

Verdict. DAZN Bet is a credible mid-market choice with the safer-gambling limits surfaced in the help section. The Cash Out caveat is a real condition that affects the platform’s flexibility. For a punter who wants guaranteed Cash Out on every market, the platform sits behind the larger books.

Tax and what the punter pays

The punter in Great Britain pays no tax on betting winnings. General Betting Duty is the operator’s tax on its gross profit from betting, currently 15%, with a new remote rate of 25% coming into force on 1 April 2027 for remote bets outside UK horse racing, self-service betting terminals, pool betting and in-person betting; those categories stay at 15%. Until 1 April 2027 the remote rate stays at 15%, and whether operators pass duty on through odds is not established. The punter never sees a tax line on a winning bet, and the duty is a cost the bookmaker absorbs into its margin.

For a punter who bets professionally, the tax treatment is different and the advice of HMRC or a tax adviser is the route. This page does not give tax advice.

The Commission’s statutory levy is a separate charge paid by operators and is not a tax on the punter. It funds treatment and education through GambleAware and related organisations.

Offshore and unlicensed operators

A bookmaker that takes bets from customers in Great Britain without holding a Commission licence is operating in breach of section 33 of the Gambling Act 2005, an offence aimed at the operator that can attract up to 51 weeks’ imprisonment, a fine, or both on summary conviction. The Commission’s enforcement is disruption rather than blocking: cease-and-desist notices, search-engine referrals, work with registrars, hosts and payment providers, and court-order DNS blocking powers that have been granted or are about to be granted. ISP-level blocking of unlicensed sites is not in operation as a blanket policy.

For a punter, the practical consequence of using an unlicensed site is the loss of the protections a GB licence provides. There is no GAMSTOP coverage, no Commission complaints route, no approved dispute-resolution body, no British consumer redress if funds are withheld, no application of the 10x bonus cap and no application of the £150 vulnerability check. A punter who has self-excluded through GAMSTOP and then opens an account at an unlicensed site has bypassed the self-exclusion; a punter who has set deposit limits at a licensed site does not have them at an unlicensed one. None of this makes an unlicensed site illegal for the customer — no offence aimed at a customer who merely bets on an unlicensed site was found — but it does mean the punter is on their own.

Advertising rules and the ASA

Advertising of gambling in Great Britain is not licensed by the Commission. It runs through the CAP Code (non-broadcast) and BCAP Code (broadcast), enforced by the Advertising Standards Authority, alongside the Commission’s marketing conditions in the LCCP. The CAP Code’s section 16 sets the rules: marketing must be socially responsible, must not be of strong appeal to under-18s, and no one who is or seems to be under 25 may be featured gambling or play a significant role in an advertisement, with an exception for marketing placed where a bet can be made directly. That rule concerns who may appear in the advertisement; it is not a rule about who may place a bet.

The “whistle-to-whistle” rule is an industry code rather than statute: since 1 August 2019 betting advertisements have not been shown on television from five minutes before a live sporting event to five minutes after it, before the 9pm watershed. Horse and greyhound racing are excluded. The Premier League clubs’ withdrawal of gambling sponsorship from the front of matchday shirts from the 2026/27 season is voluntary, not a legal requirement. The sleeves and the perimeter hoardings remain available to gambling brands.

A punter who wants to check whether a particular advertisement has been the subject of an ASA ruling can search the ASA’s case rulings online. The ASA’s rulings are public and named by brand.

How the page chooses what to recommend

The ranking is not a league table. It is a set of ten operators that hold a Commission licence, operate in Great Britain under that licence, and whose existing customer offers are confirmed against each operator’s own terms. The ranking orders them by the breadth and cleanness of the existing customer offer rather than by headline value. A clean offer with a 3% minimum odds floor and a 14-day expiry outranks a louder offer with a 5/1 floor and a 48-hour expiry, because the former is worth more on average even though the latter’s headline number is bigger.

A punter who wants a different order — “the cheapest welcome”, “the best acca boost”, “the strongest racing book” — will find a different ranking on a different page. This page ranks by what an existing customer offer is worth across a year of betting, not by what a single welcome offer pays on day one.

Frequently asked questions

What is the maximum wagering requirement on a betting bonus in Great Britain?

Since 19 January 2026 the Gambling Commission has capped wagering requirements on bonuses at 10x the bonus amount. A £20 bonus with a 50x turnover is no longer permitted; the same £20 at the cap needs no more than £200 of qualifying bets. The cap applies to bonuses with a wagering condition; whether it covers free bets with no wagering condition is not established, and the operator’s own terms are the verification.

What do minimum odds and the wagering requirement mean in a sign-up offer?

Minimum odds is the floor below which a bet does not count toward the bonus turnover; the wagering requirement is the number of times the bonus has to be staked before it becomes withdrawable. A £20 bonus at 5x with a 1/2 minimum odds floor needs £100 of bets at odds of 1/2 (1.50 decimal) or greater. The minimum odds floor changes how much each unit of turnover costs the punter, because shorter odds win more often.

Why is the stake of a free bet not paid back with the winnings?

The free bet’s terms state that the stake is not returned, and the free bet pays only the profit on a winning bet. A £10 free bet at evens pays £10 of profit on a win, not £20. The marketing word “free” obscures the distinction. The expected value of a free bet is the stake multiplied by the difference between the odds and 1, divided by the odds, multiplied by the market payout share.

Can a bet on sport be tied to a casino bonus under the Commission’s promotion rules?

Since 19 January 2026 mixed-product promotions that require a customer to gamble on more than one product type — for example “bet on football to get free spins” — are banned. An offer that bundles a sports free bet with casino slot funds is not permitted if claiming the sports free bet requires engaging the casino credit. Operators have re-shaped offers since the rule came in, and the welcome at the brand the punter is considering is the live verification.

How can it be checked that a bookmaker holds a Gambling Commission licence?

The Commission’s public register can be searched by business name, trading name, domain or account number, and it is the only test of whether a brand holds a licence. A licence number that does not appear on the register, or a domain that is offered without a Commission account number, is the warning sign. The register shows the licence categories the operator is authorised for; “remote general betting standard (real events)” is the standard sportsbook category, and “remote betting intermediary” is the betting exchange category.

Are betting winnings taxed in Great Britain, and who pays General Betting Duty?

The punter pays no tax on betting winnings. General Betting Duty is the operator’s tax on its gross profit from betting, currently 15%, with a new remote rate of 25% from 1 April 2027 for remote bets outside UK horse racing, self-service betting terminals, pool betting and in-person betting. The duty is paid by the operator, not the punter, and is absorbed into the operator’s margin. This is general information, not tax advice; a punter who bets professionally should ask HMRC or a tax adviser.

Content created by the «Boxing betting» team