The Best UK Betting Sites for Bet Builders in 2026

T&Cs: New customers only. First single & E/W bet only. Odds of 1/1 or greater. 4 X £10 bet tokens. Free bet stakes not included in returns. Free bets exclude virtuals. Free bets are non withdrawable. Free bets expire after 30 days. Eligibility restrictions and further T&Cs apply. 18+. Home #ad

T&Cs: £50 in Bet Builder Bets when you stake £10 on football. New Customer offer. Place a min £10 bet on Football on odds of min 1.5 (1/2), get £50 in Free Bet Builders after the qualifying bet has been settled. Rewards valid for 90 days. Only deposits via Pay by Bank, cards & Apple Pay will qualify. T&Cs apply. Please Gamble Responsibly. GambleAware.org #ad

T&Cs: 18+. Min deposit requirement. Free Bets are paid as Bet Credits and are available for use upon settlement of bets to value of qualifying deposit. Min odds, bet and payment method exclusions apply. Returns exclude Bet Credits stake. Time limits and T&Cs apply. Registration required.

T&Cs: Place a min £10 bet on Sportsbook on odds of min EVS (2.0), get 5x £10 in Free Bet Builders, Accumulators or multiples to use on any sport. Rewards valid for 30 days. Only deposits via Pay by Bank, Apple Pay or Debit Card will qualify. T&Cs apply. Please Gamble Responsibly. 18+. GambleAware.org #ad

T&Cs: 18+. Play Safe. Online only. Ends 31.12.26. New UK customers only, registering with promo code R30. Make your first deposit of £10+, then place a £10 single bet from main balance at odds of 1/2+ on any sports market (excluding Virtuals). Get £30 in Free Bets (3x£10) after settlement. Free Bets valid on any sports market excl. Virtuals, expire in 7 days, non-withdrawable and must be used in full (£10 each). Deposits via PayPal, Neosurf, Paysafe, Apple Pay, NETELLER, Skrill, ecoPayz, Kalibra/Postpay and WH PLUS Card excluded. One per customer. Full T&Cs apply. gambleaware.org #ad

T&C’s: New customers: Deposit £10+ and place a sports bet within 7 days from registration. Get 4 x £10 Free Bets - 2 x Football Accas (4+) & 2 x Sports Multiples (2+), valid 7 days. Min odds apply. Excludes virtual sports, esports and non-UK/IE horse racing. Opt-in required. 18+.

T&Cs: 18+. New customers only. Register, deposit with a Debit Card, and place a first bet of £10+ at Evens (2.0)+ on Sports, to be settled within 7 days, to get £30 in Sports Free Bets and £20 in Acca Free Bets within 24 hours of settlement. 7-day expiry. Eligibility & payment exclusions apply. Full T&Cs apply. GambleAware.org #AD

18+. GambleAware.org . New GB customers only. Opt in. Deposit and Bet £10+ on sports at min odds of 2.0+ (1/1) for £30 in Free Bets within 7 days. Debit cards or instant bank transfers only. Free bets expire within 7 days of issue. Geographical restrictions and T&C’s apply.

T&Cs: 18+ New customers only. Opt in, deposit and bet £10 on any sports market at 1/1+ odds within 7 days of sign up. Get 3x£10 in Free Bets for set sports markets. Free Bets expire in 7 days. T&Cs apply. GambleAware.org | Please gamble responsibly

T&Cs: 18+ New customers only. Place a £10+ bet at min odds 1/1 (2.0) within 14 days of sign-up. Get £30 in Free Bets, valid for 7 days on selected bets only. Free stake not returned with winnings. T&Cs apply. Gamble Aware

T&Cs: 18+. New UK customers (Excluding NI) only. Min Deposit £10. Min stake £10. Min odds Evs. Free bet applied on 1st settlement of any qualifying bet. 30 days to qualify. Free bets expire in 7 days. Cashed out/Free Bets won’t apply. Account & Payment method restrictions apply. 1 Free Bet offer per customer, household & IP Address only. T&Cs Apply. 18+. UK/IRE online only. Min odds 3/1. Max stake £/€20. One bet per match. 50% boost applied after all selections are settled. Max boost payout £/€1,000. Singles only. Free, void, or cashed out bets do not qualify. Payment and account restrictions apply. T&Cs apply.

T&Cs: *New members only. £10+ bet on sports (ex. Virtuals) 1.5 min odds, settled within 14 days. Free Bets: accept in 7 days, valid 7 days; £20 use on sportsbook, £10 on Bet Builder. Stake not returned. T&Cs + deposit exclusions apply. Bet Responsibly. GamCare.org.uk 18+

T&Cs: 18+ New Customers. Opt in, deposit and bet £10 on any football (odds 1/1+) within 3 days of sign up. Get 3x£10 Free Bets for set football markets. Bonuses expire in 14 days. T&Cs Apply. GambleAware.org . Please gamble responsibly.

T&Cs: New customers only. Bet £10+ in a single real-money bet within 7 days of registration to receive £10 in Free Bets credited within 24 hours of qualifying bet settlement. Free Bets Boosts expire 7 days after credit. Stake not returned. Promotional Terms Apply. 18+. Gambleaware.org

T&Cs: New players. Choose bonus at signup. Wager bonus 10x. Deposit used 1st. Any withdrawals void bonus. Valid 30 days. Odds, bet & payment limits. T&Cs apply. 18+.

T&Cs: New customers online only. Register and bet a min £5 at odds of 1/1 (2.0) or greater across sports or racing within 7 days of registration to qualify. Receive £10 Tote Credit, £10 Free Sports Bet within 48 hours of qualifying bet settlement. Qualifying bet is the first racing pool or sports bet added to bet slip. Voided/non-runner bets will not qualify; subsequent bet will be qualifying bet. 7-day expiry. 18+. One per customer. Selected customers only. Full T&Cs apply. Gambleaware.org . Full T&Cs apply.

T&C's: 18+ New UK+ROI Customers only. Certain deposit methods & bet types excluded. Min first £5 bet within 14 days of account registration at min odds 1/2 to get 6 x £5 free bets (selected sportsbook markets only, valid 7 days, stake not returned). Restrictions + T&Cs apply.

T&Cs: 18+ New customers only. Opt in, deposit & bet £10+ on any football market (odds 2.00+) within 7 days of registration. No cash out. Get £30 in Free Bets + 1x100% Boost tokens (max £10 stakes) for selected football markets Free Bets expire in 7 days. T&Cs apply. GambleAware.org | Please gamble responsibly

T&Cs: New UK customers. Min £10 first deposit. Place a bet of £5 at min odds of 2/1 (3.0) and get £30 in Free Bets within 48 hours. Restrictions apply. Full T&Cs apply. 18+. GambleAware.org

T&Cs: New Players Only. Free bet - one-time stake of £30, min odds 1.5, stake not returned. 1X wager the winnings. Wager from real balance first. Wager calculated on bonus bets only. Max conversion: £200. Valid for 7 Days from receipt. Limited to 1 sport & 5 casino brand/s within the network. Withdrawal requests void all active/pending bonuses. Excluded Skrill and Neteller deposits. Full Terms Apply. 18+. GambleAware.org

T&Cs: 18+ New UK + ROI customers only. Certain deposit methods & bet types excl. Min first £5 bet within 14 days of account reg at min odds 1/2 to get 6 x £5 free bets (selected sportsbook markets only, valid 7 days, stakes not returned). Restrictions + T&Cs apply. GambleAware.org

T&Cs: 18+. Offer stands for verified UK clients. Each Profit Boost is available for bets with no odds restriction. The maximum stake for a Profit Boost is £30. Each Profit Boost lasts for 24 hours. The Profit Boost cannot be used with Free bets. The Profit Boost applies only to single bets. Full TCs Apply. GambleAware.org

T&Cs: Place a £10 fixed odds single or £10 each-way bet at minimum odds of 1/2 and, once your qualifying bet has been settled, get 3 x £10 free fixed odds bets, 3 x £5 Total Goals football spread bets and 3 x £5 Winning Favourites spread bets and a £1 racing Race Index spread bet. 18+ www.gambleaware.org .

T&Cs: New UK customers. Place a £10 real money bet at min. 2.0 odds within 5 days of deposit. Get 4 x £10 Free Bets: 1 Single, 2 Accas & 1 Bet Builder (min. 3 selections each). Excludes cashout, E/W, Multis, Ineligible Markets & Odds Boosts. Credited after bet settlement. 7-day expiry. T&Cs apply. 18+ | GambleAware

T&Cs: 18+. New customers only. Place a minimum £40 bet on any selection with minimum odds of Evens (2.00) and receive 4x£5 Free Bets. Free bets expire after 24 hours. GambleAware.org . T&Cs & Maximum Pay-Outs Apply. #ad

18+. If your first bet is a Treble or Up on Any Sport (minimum 3 selections) AK Bets will boost the profit gained on that initial bet by 25% in the form of a Free Bet up to a value of £100. Applies to new customers who sign up to AK BETS with the promo code AKACCA100. Free Bet will be credited within 24 hours of settlement of Qualifying Bet and will expire after 7 days. Full TCs Apply. GambleAware.org

T&Cs: New Players Only. Min £10 qualifying bets, stake not returned. Free bet - one-time stake of £30, min odds 1.5, stake not returned. 1X wager the winnings. Wager from real balance first. Wager calculated on bonus bets only. Max conversion: £200. Valid for 7 Days from receipt. Limited to 1 sport & 5 casino brand/s within the network. Withdrawal requests void all active/pending bonuses. Excluded Skrill and Neteller deposits. Full Terms apply. 18+. GambleAware.org

T&Cs: 18+ New UK Customers Only. Bet £10+ on any sportsbook markets at odds of evens (2.00) or greater. No cash out. Get 50% back of your first day’s losses (from first bet settlement until 23:59) as a Free Bet up to £25, valid for 7 days. Min. 3 bets on different events required, with 2 bets being at least 50% of your largest stake. Place at least 1 bet of £10+ at odds 2.00+ to receive a £5 Free Bet even if your account is up or losses are under £5. T&Cs Apply. GambleAware.org

T&Cs: New customers only. To qualify for free bets, the new user must place and settle £20 on easyBet markets. The user must bet on at least 2 different events to qualify. The user must place and settle bets at odds of 2.0 or more. An event is classed as two different sporting events. Bets can be placed on singles, multiples and Bet Builders. The user must place and settle bets before the closing date of the promotion to qualify. Users making their first deposit by Skrill, Neteller or PaySafe card will not qualify for this promotion. T's and C's Apply. Gamble Aware. 18+

T&Cs: 18+. New customers only. Registration required. Valid on your first combo bet (minimum 3 selections, minimum odds of 1.40 per selection, minimum bet of £5). If you lose, you receive a 100% refund up to £30 as Free Bet. Free bet valid for 7 days. The Free Bet can be used on a combo bet with at least 3 selections, minimum odds of 1.40 per selection and maximum odd of 6.00, all sports, excluding horse racing and virtual sports. Gambling can be addictive. Terms & Conditions apply. Please play responsibly. GambleAware.org

T&Cs: 18+ New customers only. Opt in, Deposit & Bet £10 on any Sports market (odds 2.00+) within 7 days of registration. No cash out. Get £25 in Free Bets for any Sports market (odds 2.00+) 7 days expiry. T&Cs Apply. GambleAware.org | Please gamble responsibly

T&Cs: New players only. Bet £10 min. odds 1/1 (2.00) to get 4 x £5 Free Bets: 1 x £5 Football Bet Builder, 1 x £5 Football Acca, 1x £5 Horse Racing Acca & 1 x £5 Tennis In-Play. Valid 7 days. Exclusions and T&Cs apply. 18+. GambleAware.org

T&Cs: New customers: Deposit £10+ and place a sports bet within 7 days from registration. Get 4 x £10 Free Bets - 2 x Football Accas (4+) & 2 x Sports Multiples (2+), valid 7 days. Min odds apply. Excludes virtual sports, esports and non-UK/IE horse racing. Opt-in required. 18+.

T&Cs: 18+ New UK+ROI Customers only. Certain deposit methods & bet types excl. Min. first £5 bet on selected sports within 14 days of account reg. at min odds 1/2 to get 4x £5 free bets (selected sports only, valid for 7 days, stake not returned). Restrictions + T&Cs apply.

18+. Available to verified customers residing in the UK. Opt-in is required. Place your first bet of £10 at minimum odds of 1/1 on any sports market within 7 days of registering. Get £30 in Free Bets (1 x £10 Horse Racing Free Bet + 1 x £10 Football Acca Free Bet + 1 x £10 Basketball/Tennis Acca Free Bet )T&Cs apply. 18+ Please gamble responsibly. GambleAware.org

T&Cs: New customers only. Applies to the 1st deposit using code WELCOME7. Min deposit £20. Min qualifying bet £20 at odds 1/1 (2.0). Cash‑out not permitted. Bonus Bets issued as 1×£7 BB (any sport excl. Virtuals), followed by 1×£7 BB (Horse Racing, SP/EW excluded) and 1×£7 BB (Football ACCA, min 4 selections, min odds 4.0). Bonus Bet stake not returned. Bonus Bets valid 5 days from credit. Max winnings £500 / £500 / £100 per Bonus Bet. One per customer. General T&Cs apply. GambleAware.org | 18+

T&Cs: Applies to new UK/IE customers who sign up via approved partner sites with promo code bet20get10. Place a minimum £20 cash bet at odds of Evens (2.0) or greater and receive a £10 Free Bet 18+. GambleAware.org . Full T&Cs apply.

T&Cs: New members only. £10+ bet on sports (ex. virtuals) at 1.5 min odds, settled within 14 days. Free Bets: accepted in 7 days, valid 7 days; £20 use on sportsbook, £10 on Bet Builder. Stake not returned. T&Cs + deposit exclusions apply. Bet Responsibly. Gamcare.org . 18+ †Members only. Use Free Bet on any Bet Builder market for the selected football match by kick-off (EVS min odds). Free Bet: login & accept via pop-up, max 1/ Member. Free Bet varies from £1 - £20 per Member. Stakes not returned T&Cs apply. Click here for full T&Cs. Bet Responsibly. Gamcare.org . 18+

T&Cs: 18+. New verified customers only. Opt-in required. Deposit £10 and earn £1 of Free Bet value for every £1 staked on accumulators of 5 or more selections with minimum odds of 1.25 (1/4) per selection. Min Reward: £1 Free Bet / Max Reward: £10 Free Bet. Cash in or claim within 48 hours of promo end. Free Bets expire 7 days after claim. Full TC's Apply. GambleAware.org .

T&Cs: New Players Only. Free bet - one-time stake of £40, min odds 1.5, stake not returned. 1X wager the winnings. Wager from real balance first. Wager calculated on bonus bets only. Max conversion: £200. Valid for 7 Days from receipt. Limited to 1 sport & 5 casino brand/s within the network. Withdrawal requests void all active/pending bonuses. Excluded Skrill and Neteller deposits. Full Terms apply.

T&Cs: T&Cs apply. 18+ New customers only. You must place a single win-only bet of £10 or more with odds of evens (2.00) or greater to qualify. Money back as £10 in free bets. Free bet is credited the day after the qualifying bet has settled. Must use code B10G10 when creating an account. GambleAware.org

T&Cs apply. 18+ New customers only. You must place a £20+ pre match single or multi bet. Min odds of 1/2 (1.50). Money back as £20 in free bets, 1 per account. Free bets credited by 12pm the day after your qualifying bet settles. Excludes specials, bet builders & cashed-out bets don’t count. Must use code B20G20afs when creating an account. GambleAware.org

T&Cs: 18+ | New UK customers only. Place a £20+ bet with minimum 3 legs, min 2/1 and receive a £10 Free Bet. The Free Bet will be credited once your qualifying bet settles. Free Bet expires 7 days after being awarded. GambleAware.org | T&Cs & Maximum Payouts apply.

18+ | New players only. Opt-in required. Min deposit £20. Offer is 100% match bonus up to £30 on your first deposit. Bonus funds can be used on a real money sports bet with minimal odds of 3/4 (1.75 decimal) or higher, any sport except virtuals, boosted odds, handicap, & draw no bet markets. Bonus funds are separate to cash funds and subject to 10x wagering requirement (bonus funds). Only bonus funds count toward wagering contribution. Winnings from bonus funds capped at x10 amount credited. Bonus funds must be used within 30 days. Affordability checks apply. Terms Apply. | GambleAware.org

T&Cs: Use Code: 36VACCAINS Place a 5+ leg ACCA on any sport. If 1 leg loses, get 100% stake back as a free bet (max £136). Qualifying bets to be of odds of at least 3.00 total (2/1) and each leg at odds of at least 1.50 (1/2). Bets to be settled within 7 days of claiming Welcome offer. Free bet valid 7 days from issue, usable on any Sport/Market as a 3+ fold ACCA with total odds 3.00–21.00, each leg 1.50+. One claim per customer. Cannot be combined with the Casino welcome offer. Offer granted on first deposit of £5+ using the generated code. New and invited accounts only. 36 Vegas reserves the right to restrict or exclude any customer at its discretion, including for compliance, risk, account behaviour, or responsible gambling reasons. 18+. Full TCs Apply. GambleAware.org

T&Cs: New customers only. Place a min £20 cash bet at odds 2.00+ to qualify. Build-A-Bet / Bet Builder bets do not qualify. Max reward: one £10 In-Play Free Bet and one £10 Bet Builder Free Bet. In-Play Free Bet min odds 2.0 (1/1). Bet Builder Free Bet min odds 3.0 (2/1). Free Bets expire 7 days after credit. 18+. Full T&Cs apply. GambleAware.org

T&Cs: New customers only. 18+. Code [AFF10102x5]. £10 cash bet on any sport, min. odds 2.0 (excl. specials, in-play & price boosts). 2x£5 Free Bet Tokens credited daily from settlement. 24hr expiry. Stake not returned. One per household/IP/email. T&Cs apply. GambleAware.org .

T&Cs: 18+. Sign up today with Bonus code 'REBATE". Qualified Users will receive a 10% rebate on Overall Net Losses recorded 30 calendar days from Registration. These losses are exclusive to Matchbook Exchange markets only. Losses on Multiples, Bet Builders, Casino or other products do not count and are excluded. Only T’s and C’s Apply. Gamble Aware.