The 10 Bookmakers Whose Existing Customer Offers Are Actually Worth Claiming

Updated October 2026

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Data current as of 27 October 2026, checked against the Gambling Commission’s public licence register.

Welcome offers are the bait. The offer that follows — the free bet on a Saturday, the odds boost that lands in the app on a Tuesday, the refund when an acca lets you down by one leg — is what the relationship actually runs on. That is what this page ranks. Ten brands, all licensed by the Gambling Commission for Great Britain, judged on what their ongoing offers cost the punter once the marketing varnish has been scraped off.

The honest starting point is the rule that sits on top of all of them. Since 19 January 2026 the Commission has capped wagering requirements on bonuses at ten times the bonus amount, and banned any promotion that requires a customer to gamble on two or more product types at once — a free-bet-plus-spin bundle, a sports bet that unlocks bingo credit. The cap is the floor; what sits on top of it is the offer each operator chooses to run, and it is from those offers that this ranking is built.

The Shortlist at a Glance

Ten brands, each holding a Gambling Commission remote licence, ordered by the depth and reach of their existing-customer offer book rather than by headline sign-up value. The full reviews follow the table.

Ten brands, but only one set of rules they all live inside. The next sections explain what those rules are, where the bonuses they advertise actually come from, and how each operator’s offer book stacks up once the marketing words are gone.

How Existing Customer Offers Actually Work

An “existing customer offer” is anything the bookmaker sends to a punter who has already passed the sign-up stage: the free bet club that credits tokens for a run of qualifying bets, the price boost on a Champions League match, the money-back offer on a horse race, the acca insurance that refunds one leg when the rest land. Welcome offers live in the same commercial frame, but a brand’s true standing is set by what it does once the first deposit is gone.

Three shapes matter more than the others.

Price boosts. The bookmaker improves the price on a named selection — a goalscorer from 5/1 to 7/1, an each-way favourite from 4/1 to 6/1. The stake is paid back in full if the bet wins, and the boost is a real improvement on the underlying market. The arithmetic sits inside the price itself: if the boost is on a market whose true margin is 5%, an extra 25% of price looks generous against a competitor offering 10%. The honest measure is the implied margin after the boost, not the percentage the marketing puts on the headline.

Free bets. A token credited to the account, used like a stake but returned to the bookmaker along with any losing wager. A £10 free bet at 5/1 returns £50 of profit if it wins — not £60 of stake plus profit. The bet365-style Bet Credits, the Sky Bet free-bet club tokens, and the BoyleSports £20-back stake all work on this rule. Free bets carry no stake return, which is why the calculation section below spends time on what they are actually worth in expected terms.

Refund / insurance offers. Money-back if a named condition is not met — typically a stake refund if one leg of an accumulator lets you down, or if a horse finishes second to a non-runner in a specified race. BoyleSports’ Acca Insurance pays up to £20 back as a free bet when one leg fails; the football “money-back if 0-0” promos from Coral and Paddy Power work the same way. The refund almost always comes as a free bet, not as cash, and the difference matters: a cash refund is the stake returned; a free-bet refund forfeits the stake on the new wager.

Three quirks turn those shapes into traps for the unwary. Minimum odds are the price floor a bet must clear to count — Coral’s welcome offer requires 2.0 (1/1), BoyleSports’ Acca Insurance requires 1/2, QuinnBet’s free bets sit between 1/2 and 50/1. The wagering requirement is how many times the bonus or free bet value must be staked before any winnings become withdrawable. Expiry windows range from 48 hours (SBK credits free bets inside two days) to seven days (Sky Bet, Dabble, Coral) to 28 days (Spreadex for the qualifying bet alone). Read those three together and the apparent value of an offer usually halves.

The Bonus Cap That Sits on Top of All of Them

The Commission’s promotion rules that took effect on 19 January 2026 set two hard limits. Wagering requirements on bonuses are capped at ten times the bonus amount: a £10 bonus at 50x would have demanded £500 of qualifying bets; under the cap no bonus can demand more than £100 of qualifying stakes for every £10 of bonus. Mixed-product promotions — those that compel the customer to gamble across two or more product types, for example a sports bet unlocking free casino spins or bingo credit — are banned outright.

What the rules do not settle matters too. Whether the ten-times cap applies to free bets with no wagering condition has not been established by the Commission. Any cap on the absolute money value of a bonus has not been set. What is settled is that the era of fifty-times wagering on a £200 deposit match is closed.

A second caveat hides behind that floor. The cap and the ban cover bonuses. The bulk of an existing-customer offer book — daily boosts, Best Odds Guaranteed, acca insurance, free-to-play games — sits outside the bonus framework and is governed by the operator’s own terms and the social responsibility code. Those offers are still subject to the LCCP marketing rules and to consumer-protection law, but the 10x cap does not literally apply.

Who Is Allowed to Offer Them

Every brand on this list is licensed by the Gambling Commission under the Gambling Act 2005. Northern Ireland has its own regime and is outside the Act, so a “GB licence” regulates only England, Scotland and Wales. Since the Gambling (Licensing and Advertising) Act 2014, an operator whose remote facilities are used in Great Britain needs a Commission licence regardless of where it sits — Gibraltar, Malta, Curaçao, the Isle of Man. A Maltese or Curaçao licence is not a substitute for the Commission’s; some operators hold both.

Five licence categories cover what an online bookmaker actually does: remote general betting standard (real events), remote general betting standard (virtual events), remote general betting limited, remote pool betting, and remote betting intermediary (the exchange category). The general betting standard (real events) licence is the one that covers what a punter thinks of as a “normal” sportsbook. Spreadex also holds FCA authorisation for its financial spread-betting arm — separate regulator, separate framework — and is the only brand on this list that does so.

The Commission’s public register, searchable by business name, trading name, domain or account number, is the test of whether a brand holds a licence. Domain tells you nothing — licensed operators use .com as well as .co.uk. The account numbers cited in the reviews below come from that register, and a punter who wants to verify them should search the register directly. Two brands running under one licence is normal — Ladbrokes and Coral both sit under LC International Limited, Paddy Power and Betfair under PPB Counterparty Services — and the reviews treat them as the separate consumer brands they appear as in the app.

No age below 18, no play before identity is verified. Since 7 May 2019 the Commission has required operators to verify name, address and date of birth before a customer can deposit or place a bet — a free-bet or bonus token included. Verification runs against public-record and credit-reference data, and a brand that lets a punter gamble before that check has completed is in breach of its licence conditions.

Staying in Control

The offer book is built to keep a punter coming back. The control structure sits on the other side, and on a licensed site it is more developed than the offer book.

GAMSTOP is the national multi-operator online self-exclusion scheme, and on a Commission licence it has been mandatory since 31 March 2020. A self-exclusion can be set for six months, one year, five years, or five years with auto-renewal. After the minimum period has run, the exclusion stays in place for a further seven years unless the punter asks GAMSTOP to lift it. GAMSTOP covers online sites and apps; betting shops use a separate service.

Financial vulnerability checks apply to any licensed remote operator once a customer’s deposits minus withdrawals exceed £150 in a rolling 30 days. The check is a public-record check — bankruptcy, county court judgments — not an income check, not a credit reference. It has been in force since 28 February 2025 and is the first of the Commission’s two affordability checks.

Financial risk assessments — the deeper affordability reviews the press describes as “affordability checks” — were announced by the Commission on 7 July 2026 in a staged plan. The start date has not been set. Until it is, any commentary that calls these checks “in force” overstates the position.

Deposit limits must be offered by every licensed remote operator on a fixed time frame under Remote Technical Standard 12. The first phase has applied since 31 October 2025; a second phase was postponed to 30 September 2026. There is no state-set ceiling on what a punter can deposit or lose — the limit is a customer’s choice — and the role of the limit is to make that choice deliberate.

Help exists outside the operator. GamCare runs the National Gambling Helpline. GambleAware funds treatment and research. The NHS runs gambling clinics in several regions. Gamblers Anonymous runs peer-support meetings. The brands on this list fund some of those bodies through the Commission’s levy; the bodies themselves are independent.

The third rail of the safety structure is plain consumer law. A punter who believes a licensed operator has withheld funds unfairly can complain to the operator first, then escalate to an approved alternative dispute resolution body — IBAS for most of the brands on this list. A punter who bets on a site that holds no Commission licence has none of that.

What an Offer Actually Costs

The 19 January 2026 promotion rules changed the arithmetic of betting bonuses. The change worth understanding is the cap itself.

A £10 bonus at the 50x wagering factor that was common before the cap would have required £500 of qualifying bets before the bonus became withdrawable. Under the new cap no offer can demand more than £100 of qualifying stakes for every £10 of bonus. That is a hard ceiling on how much play a bonus can lock up. For a punter who would have wagered £500 anyway, the cap saves nothing; for the punter who would have walked away after £100, the cap is the difference between the bonus being claimable and the bonus being unaffordable.

A second rule sits beside it. Mixed-product promotions are banned. The “bet £10 on football to get 50 free spins” offer that was a marketing staple through 2024 and 2025 is no longer available on a licensed site. The bonus either lives entirely inside one product or it does not live.

The rules cover bonuses. They do not cover free bets with no wagering condition, and they do not cover price boosts, acca insurance, or Best Odds Guaranteed. Those offers are governed by the operator’s own terms. The distinction matters because the existing-customer offer book leans heavily on the second group. A £30 free-bet club credit at 1/2 minimum odds, expiring in seven days, with no wagering requirement: the Commission’s cap does not literally bite on that token. The LCCP marketing conditions and the operator’s own terms still apply, but the headline ten-times figure does not govern it.

For free bets specifically, the calculation the punter actually cares about is what the token is worth on average. A £10 free bet on a Premier League match at 5/1 has a fair value close to £8.33 of profit at a 100% market — the calculation gives £10 × (5/1) ÷ (5/1 + 1) — but the Premier League match is not a 100% market, and the margin inside the offered price is what eats the value. Stack a 5% margin on top and the expected value of the free bet drops to roughly £7.50. That is what a £10 free bet is worth on average before minimum-odds floors, expiry windows and eligible-market filters are layered on.

The Ten Operators in Detail

Each review below covers a brand’s existing-customer offer book as it stood in mid-October 2026, the shape of the welcome offer that gates entry into that book, the Gambling Commission licence number the brand holds, and a verdict that says what the brand is actually for. The licence numbers are cited without their full numeric strings where the register’s account identifier is the test a punter should run — search the public register by business name if you want to confirm.

bet365 — The Engineered Offer Book

Bet365’s edge is volume and consistency. The brand runs a daily Bet Boosts feed on selected singles, Super Boosts on marquee events, and Winnings Boosts on Bet Builders and selected singles that lift the return on a winning bet without changing the stake. Bet Builder+ extends the same builder concept to multi-game combinations and is available pre-match and in-play, which most competitors still don’t match.

The licence sits with bet365 Group Limited under a Commission remote general betting standard (real events) licence. Welcome offers vary by territory and season and are governed by the brand’s own customer terms; they are not part of the bet365 reputation.

What it suits. A punter who wants daily price movement across football, tennis and US sports, who builds accas, and who treats the offers as part of a routine rather than as the reason to bet. The app’s in-play depth means the boosts keep landing through the match.

The trade-off. The boost catalogue rewards volume — the more you bet, the more the feed targets you. A casual punter sees a tenth of what a daily user sees, and the welcome offer is quieter than several competitors’.

William Hill — The Acca Boost Specialist

William Hill’s headline existing-customer mechanic is the Football Acca Boost, a percentage uplift on accumulator winnings that scales with the number of legs: 3% on a double, climbing through the folds up to 200% on twenty legs or more. The cap is £10,000 per online bet, and the promotion runs until 30 May 2027. Each leg must be at 1/5 or bigger, which keeps the boost on realistic accas rather than on longshot of the sport.

The licence sits with WHG (International) Limited. William Hill’s welcome terms are app-led and rotate; the brand is judged on its acca book, not on its first-deposit headline.

What it suits. Football acca players who build their own multiples rather than using a bet builder, who want the boost to scale with the ambition of the slip. A treble at 5/1 paying 3% extra is a modest sweetener; a fifteen-fold at 200/1 paying 200% extra is a serious addition.

The trade-off. The boost is football-only, with other sports covered by separate mechanics. Outside the football season the offer book thins out.

Coral — The Daily Reward Machine

Coral’s existing-customer book is built around three pillars. The Reward Shaker is a free daily game that pays out free bet tokens, price boosts, and other prizes; it is the loudest part of the Coral offer book and the reason the app sends a daily prompt. The Odds Booster applies to hundreds of markets — a steady stream of price improvements across football, horse racing and tennis. The Football Super Series is a free-to-play predictor with a £10,000 jackpot that runs on Premier League and major European fixtures. The Coral welcome offer gates entry: a £20 qualifying bet at minimum odds of 2.0 (1/1) credits £40 in free bets within seven days, expiring seven days after issue.

The licence sits with LC International Limited — the same licensee as Ladbrokes — under a Commission remote licence covering general betting standard (real events) and betting intermediary. Coral’s payment methods include debit cards, Apple Pay, Visa, Mastercard, Revolut Pay, Google Pay, TrueLayer, Earthport and Trustly; credit cards are not on the list, and cannot be, since the Commission’s ban on credit cards for gambling took effect on 14 April 2020.

What it suits. The punter who likes a daily habit — a shake, a boost, a free-to-play pick — and who wants the existing-customer book to feel like a sequence rather than a single promotion.

The trade-off. The Reward Shaker’s tokens expire, the Super Series runs only on certain fixtures, and the welcome offer’s £40 in free bets is a fair headline rather than a market-leading one.

Unibet — The Streaming-First Sportsbook

Unibet’s edge is the combination of Uniboosts, Bet Builder, Best Odds Guaranteed on UK and Irish horse racing, in-play betting, Cash Out on thousands of markets and Unibet TV — the live streaming feed that runs alongside the in-play markets. The welcome offer is the standard £40-for-£20 free bets package at minimum odds of 2.0 (1/1), with free bets expiring within seven days of issue. The brand’s UK site is run by Platinum Gaming Limited, Gibraltar, under Gambling Commission account 45322.

Unibet has operated since 1999 and sits inside the Kindred Group, which also runs 32Red, Maria Casino and other brands. The licence holder for the UK is Platinum Gaming Limited; the parent is regulated in multiple European jurisdictions.

What it suits. A punter who watches the events they bet on. Unibet TV makes the in-play book feel different from a sportsbook without streaming, and Best Odds Guaranteed on horse racing is a quiet earner over a season of bets.

The trade-off. The welcome offer is competitive but identical to several competitors’ offers. The bet builder is solid rather than best-in-class.

Spreadex — The Spread-and-Fixed Hybrid

Spreadex is the only brand on this list that combines fixed-odds betting with financial spread betting — the latter regulated by the FCA, the former by the Gambling Commission. That dual framework matters because spread betting losses can exceed deposits, and Spreadex’s own homepage states this. The brand’s existing-customer offer book is built around Acca Boosts on football accumulators of three or more selections, paying a cash boost from 5% up to 100% depending on the number of legs, and a £60 fixed-odds welcome package for a £10 qualifying bet. The qualifying bet must be placed within 28 days of opening the account, and the minimum odds on the qualifying fixed-odds bet are 1/2.

The licence sits with Spreadex Limited. The FCA authorisation sits on the spread-betting arm. The two frameworks govern different products on the same platform.

What it suits. The punter who already understands spread betting — or who is willing to learn it on a separate product from the fixed-odds book. The fixed-odds offers are competitive in their own right, and the Acca Boost structure scales with the ambition of the slip.

The trade-off. A punter who only wants fixed-odds betting is paying for an FCA-regulated spread arm they will not use. A punter who only wants spread betting needs a different kind of platform.

BetVictor — The Quiet Multi-Sport Operator

BetVictor’s existing-customer book runs on regular price boosts, acca offers and free bets on selected events — the standard multi-sport sportsbook pattern, executed with discipline. The welcome offer lives inside the app and is governed by the brand’s customer terms; BetVictor does not always run a sign-up promotion, and when it does the headline offer is mid-market.

The licence sits with BetVictor Limited. The brand’s history stretches back to 1946 in the betting-shop era and through the digital transition without losing its independent ownership.

What it suits. A punter who values consistency over noise. BetVictor’s boost catalogue is not the loudest, but it is rarely empty, and the operator’s terms tend to be cleaner than several competitors’.

The trade-off. The welcome offer is not a market-leader, and the brand has fewer football-specific promotions than Coral, Paddy Power or Betfair.

BoyleSports — The Acca Insurer

BoyleSports’ existing-customer book is built around two named promotions and a steady stream of daily free bets. Acca Insurance refunds up to £20 as a free bet when one leg of a qualifying acca lets you down — minimum stake £5, minimum odds 1/2, opt-in required, and the bet must be placed and settled on the same day. Acca Loyalty pays a free bet for settled accas of five or more legs with combined odds of 3/1 or bigger, again with a £5 minimum stake and opt-in. The free bet expires after seven days. BoyleSports’ sports welcome offer for UK players is £20 in free bets when a £10 bet is placed, with Irish customers getting €30 in free bets for a €10 bet.

The licence sits with BoyleSports (Gibraltar) Limited. The brand is the largest independent bookmaker in Ireland and runs a parallel UK operation.

What it suits. The punter who builds accas regularly and wants a refund mechanism for the one-leg miss. Acca Insurance is a quiet earner over a season of multiples.

The trade-off. The refund is a free bet, not cash, and the stake is forfeit on the replacement wager. The opt-in requirement catches out the punter who didn’t tick the box.

Sky Bet — The Free Bet Club Pillar

Sky Bet’s welcome offer is structured around the brand’s free bet club: three £10 free bet tokens credited 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 mechanic extends into the existing-customer book, where Sky Bet runs a steady stream of daily boosts and Extra Places on the major horse racing meetings — Cheltenham, the Grand National festival, Royal Ascot. Sky Bet is the sportsbook arm of the Sky group, run by SBG Sports Limited under Gambling Commission account 67370.

What it suits. A punter who bets on horse racing and wants Extra Places on the major meetings; a punter who values a brand owned by a mainstream broadcaster, with the consumer-protection profile that comes from that ownership.

The trade-off. The welcome offer is small (£30 in free bets) and the qualifying bet is a 5p minimum — the headline is more generous than the substance. The brand is judged on its existing-customer book, not its welcome.

Kwiff — The Surprise Booster

Kwiff’s signature feature is “Supercharged” odds: any bet on the platform can be randomly boosted at the moment of placement, with the published example taking a price from 2/1 to 20/1. The mechanic applies to single and multi bets on any sport, and Kwiff also runs a guaranteed weekend acca boost plus Bet Builder and Bet Builder+ — the latter combining Bet Builder bets from different games, which is unusual.

The licence sits with Kwiff Limited under a Commission remote general betting standard (real events) licence. Kwiff is a younger brand than most on this list and has built its reputation on the Supercharge mechanic.

What it suits. A punter who likes surprise and a flat staking plan — the boost does not change the stake, so a £10 Supercharged at 20/1 returns £200 instead of the £30 a 2/1 price would pay.

The trade-off. The randomness cuts both ways: a Supercharge that does not land is still a normal bet, and the punter who relies on the boost for value will be disappointed more often than not.

Paddy Power — The Marketing Department in Sportsbook Form

Paddy Power’s existing-customer book is the most promotional in the British market. Money-back specials on football (the brand pays back stakes on losing bets when specific conditions hit, often 0-0 in the first half, a red card, a named goalscorer failing to score), Extra Places on the major horse racing meetings, “Power Price” boosts on selected selections, and a steady stream of novelty markets on politics and entertainment. The marketing is the brand. The brand is the marketing.

The licence sits with PPB Counterparty Services Limited — the same licensee as Betfair, with the two brands running on the same platform. Paddy Power’s welcome offer rotates seasonally and is governed by the brand’s customer terms.

What it suits. A punter who likes a promotion tied to a narrative — a refund if Messi doesn’t score, Extra Places on the Gold Cup favourite, a price boost on a political outcome. The novelty markets are a category of their own.

The trade-off. The novelty markets and politics bets sit in a regulatory grey zone; the offers on them are real but the events they cover are not always what a serious sports punter wants exposure to. The welcome offer’s headline is loud but the substance varies by season.

What the Wagering Cap Means in Practice

The promotion rules that took effect on 19 January 2026 changed the cost of clearing a bonus for every punter in the market. A worked example shows what the change is worth.

A typical pre-cap bonus: a £50 deposit matched with a £50 bonus at a 40x wagering requirement, with a 7-day expiry and a minimum odds floor of 4/5 on each qualifying bet. The total turnover demanded would have been £2,000 of qualifying stakes — bonus value multiplied by the wagering factor — over a week, with each stake needing to clear 4/5. At a margin of 5% on the average market, the expected cost of clearing that bonus would have been £100 of expected loss against a £50 bonus, a ratio that made most bonuses unclaimable for a punter who could not sustain the volume.

The post-cap version of the same headline — £50 bonus at 10x, 7-day expiry, same minimum odds — demands £500 of qualifying turnover. At the same 5% margin the expected cost of clearing is £25 of expected loss against a £50 bonus. That is claimable. The cap moved the bonus from “negative expected value at any reasonable stake level” to “positive expected value if the punter would have wagered anyway”. The cap does not turn a bonus into a gift. It turns an unaffordable bonus into one a punter can realistically clear.

The wagering cap does not govern free bets with no wagering requirement, and a brand that issues free bets straight into the account — most of the brands on this list do, in their free bet clubs and weekly promotions — is not constrained by the 10x ceiling on the token itself. The token is what it is: a free stake that pays profit only. The arithmetic that matters is what the token is worth on average against the markets it can be used on, and the calculation in the next section is the honest way to think about it.

How a Free Bet’s Value Is Calculated

A £10 free bet at 5/1 has a fair value of £8.33 of profit at a 100% market — the formula is free bet value × (odds − 1) ÷ odds. At a 5% margin the expected value drops to roughly £7.92. At 10% margin it drops to £7.50. At a 15% margin — closer to the margin on a tight Premier League match — it drops to £7.09.

Layer the offer’s constraints on top. Minimum odds of 1/2 push the expected value up by widening the eligible market; the bet has to be on something longer than a heavy favourite. Expiry of seven days limits the punter’s window to find a price that fits. Eligible events (often “any sports market”, sometimes restricted to specific events) narrow the available prices further.

A £10 free bet from Sky Bet, BoyleSports, Coral or Paddy Power, used on a Premier League match at 5/1 with a 5% margin, is worth roughly £7.92 of expected profit. A £30 welcome free bet bundle, used over three such matches, is worth roughly £23.76. That is the honest value of the offer, before the punter’s own skill in finding the right price changes the figure. A punter who routinely prices better than the market can do better; a punter who routinely prices worse will do worse.

What the Number of Bets Looks Like

For a £50 bonus at 10x wagering, with each qualifying bet at minimum odds of 4/5, the required turnover is £500 of stakes. At an average stake of £10, that is fifty qualifying bets over the bonus’s seven-day expiry window — seven bets a day, or ten a day for a five-day punter. That is the volume the post-cap bonus demands.

The same bonus at 5x wagering — half the new cap — would demand £250 of turnover at £10 per bet, twenty-five bets over the week. The Commission’s 10x ceiling does not require 10x wagering; it caps it at 10x. Most licensed operators will land at the new lower end of the scale rather than at the cap.

A Note on Welcome Offers

Welcome offers are not what this page ranks. They are listed because the welcome offer is the gate that lets a punter into the existing-customer book, and because the headline price is the first number a punter sees. The brands on this list run welcome offers in different shapes:

• Coral and Unibet offer the same headline: £40 in free bets for a £20 qualifying bet at minimum odds of 2.0 (1/1), with free bets expiring within seven days of issue.
• Sky Bet offers £30 in free bets, credited as three £10 tokens after a £5 deposit and a first bet of at least 5p at 1/1 or greater.
• BoyleSports offers £20 in free bets for a £10 qualifying bet for UK customers.
• Spreadex offers £60 in free bets for a £10 fixed-odds qualifying bet at 1/2 minimum odds, with the qualifying bet placed within 28 days.
• BetTom offers 50% back as a free bet of up to £50 for the sportsbook, with a matching 50% back of up to £50 as free slot funds for casino play — a structure the post-19 January 2026 rules would now block if BetTom offered it as a new promotion.
• Dabble offers £10 in free bets for a £10 qualifying first bet, with a 7-day expiry, minimum odds applying, and the stake not returned.
• Sporting Index offers a £10 fixed-odds qualifying bet at 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, with the qualifying bet not placeable in-play and not cashable out.
• Copybet offers the Acca Booster (up to 100% cash bonus on accas of three or more selections) and a Daily Profit Boost of up to 15% as ongoing offers, with welcome terms varying by territory.
• QuinnBet offers free bets valid for 7 days from credit 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.
• 10bet offers a 100% up to £50 betting bonus for UK sign-ups, plus daily free bets and free spins.
• Smarkets / SBK offers £60 in free bets within 48 hours of a £20 first deposit and £20 bet at minimum odds of 3.0.
• bet365, William Hill, BetVictor, Kwiff and Paddy Power run rotating welcome offers governed by their customer terms rather than a standing headline.

A welcome offer’s headline number is not the offer’s value. The £40 in free bets at Coral and Unibet is worth roughly £32 in expected terms against a 5% margin; the £60 at Spreadex is worth roughly £48; the £30 at Sky Bet is worth roughly £24. Welcome offers that look modest in headline sometimes clear more easily than headline-heavy rivals. A punter who claims a £50 bonus with a 10x wagering requirement at minimum odds of 4/5 and clears it inside seven days has made a £25 expected-profit claim on a £50 headline. A punter who claims a £200 bonus with the same factor and the same minimum odds has made the same £25 expected-profit claim, but against a £200 headline, with the difference between the two written off in expected loss to the margin.

The arithmetic is the same shape whatever the headline. The cap that took effect on 19 January 2026 fixed the worst of it.

Why the Same Bookmaker Looks Different in Different Markets

A price comparison between Coral and Paddy Power on the same Premier League match will show a 5% margin at one and a 6% margin at the other, and the difference is not random. The margin is set by the operator’s commercial model, the volume of bets the operator expects to take on the event, and the depth of the liquidity underneath. A bookmaker with a strong in-play feed and a deep trading desk can run tighter margins on Premier League matches than a bookmaker with a thinner operation, and that tightness shows in the prices.

Price boosts distort the picture, by design. An “Odds Booster” that takes a goalscorer from 5/1 to 7/1 is a 40% boost on the headline price; it is not a 40% boost on the underlying probability. The implied probability at 7/1 is 12.5%; the implied probability at 5/1 is 16.7%. The boost moves the price by 4.2 percentage points of implied probability — a real improvement, but smaller than the headline suggests.

Best Odds Guaranteed on horse racing is the cleanest existing-customer offer on the British market. If the starting price is larger than the price the punter took, the bookmaker pays out at the SP. Over a season of bets on UK and Irish racing the offer is worth a steady percentage of stake back to the punter, and the punter who takes early prices on favourites consistently comes out ahead.

A Final Word on the Brands Not on This List

The list above is ten brands, all holding a Commission licence, all running an existing-customer offer book that justifies inclusion. The list is not the market. The Commission’s public register lists far more operators than ten — the remote general betting standard (real events) category alone runs to dozens of active holders — and the brands that did not make this list have not been excluded because they lack a licence. They have been excluded because their existing-customer offer book did not justify a review at the depth of the others.

Three classes of brand live outside the list. The pure exchanges — Betfair, Betdaq, Smarkets (Smarkets itself is on the list under its sportsbook arm SBK) — run a betting intermediary licence rather than a sportsbook licence, and their existing-customer offers sit on a different commercial model. The casino-led brands — those whose primary licence is a remote casino licence and whose sportsbook is an adjunct — typically run thinner sportsbook offer books and have not been included here. The brands licensed only for pool betting, virtual events or betting shops do not operate the kind of existing-customer offer book this page ranks.

Offshore brands — those holding no Commission licence — are not on the list. They cannot be advertised to British customers under the CAP Code, and a punter using them loses the consumer-protection frame this page is built around. A GB-licensed operator offers the Commission’s complaint route, IBAS alternative dispute resolution, GAMSTOP coverage, the bonus cap, the £150 vulnerability check, and the obligation to verify identity before the first deposit. An offshore operator offers none of those. The choice is the punter’s; this page is built on the licensed side of it.

The Numbers Behind the Bonus

The 10x wagering cap that took effect on 19 January 2026 is the headline. The numbers behind it are the substance.

A £50 bonus at the new 10x cap requires £500 of qualifying turnover. At £10 per qualifying bet, that is fifty bets over the bonus’s seven-day expiry — seven bets a day. At £5 per bet, that is a hundred bets over the week. Each qualifying bet must clear the operator’s minimum odds floor (typically 1/2 or 4/5). The volume is real. The bonus is real. The cost of clearing it, in expected terms against a 5% margin, is £25 of expected loss against a £50 bonus, a ratio that turns the bonus from a marketing trap into a claimable offer.

For a punter who would have wagered anyway, the bonus pays. For a punter who is drawn into a £500 of bets they would not otherwise have placed, the bonus costs more than it returns. The 10x cap fixed the worst of the marketing trap. It did not turn a bonus into a gift.

Frequently Asked Questions

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

Since 19 January 2026, no licensed operator can set a wagering requirement higher than ten times the bonus amount. A £10 bonus can demand at most £100 of qualifying bets before the bonus is withdrawable. The cap applies to bonuses; free bets with no wagering condition sit outside it. Mixed-product promotions — those that compel gambling on two or more product types such as betting and casino — are banned outright.

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

The minimum odds are the price floor a qualifying bet must clear to count toward the wagering requirement. Coral’s £40 free bet offer requires the qualifying bet to be at 2.0 (1/1) or bigger; BoyleSports’ Acca Insurance requires 1/2; SBK’s £60 free bet offer requires 3.0. The wagering requirement is the number of times the bonus or free bet value must be staked before any winnings become withdrawable. Together, the two determine how much play an offer actually demands, and that is the real measure of the offer’s value.

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

A free bet is a token, not a stake. The bookmaker lends the punter £10 of bet value; if the bet wins, the punter keeps the profit but the £10 stays with the bookmaker. A £10 free bet at 5/1 returns £50 of profit, not £60. The stake-not-returned rule is standard across the British market and is the reason a free bet’s expected value is always less than its headline number.

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

No. Since 19 January 2026 mixed-product promotions are banned on Commission-licensed sites. An offer that requires a punter to gamble on sport to unlock casino credit, free spins or bingo funds cannot be marketed. BetTom’s existing welcome offer — 50% back as a free bet on sports plus 50% back as free slot funds for casino — is the kind of structure the new rules block from new promotions, though existing offers may run under transitional arrangements.

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

The Commission’s public register is searchable by business name, trading name, domain or account number. Search by the brand’s trading name; the result should show a remote general betting standard (real events) licence or a remote betting intermediary licence for any sportsbook on this list. The account numbers cited in the reviews above come from that register and can be used to confirm the entry directly. A domain ending in .co.uk does not prove a licence; licensed operators also use .com.

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

No. The punter pays no tax on betting winnings in Great Britain, regardless of the size of the win. General Betting Duty is the operator’s tax, currently 15% of gross profits on most bets, rising to 25% on remote bets from 1 April 2027 except for bets on UK horse racing, pool betting and in-person bets. The duty is the operator’s liability, not the punter’s; whether operators pass duty on through odds is not established.

Content created by the «Bookies Trust» team