Best Online Bookmakers 2021

Last Updated: Jul 20th, 2020
Compare offers & read top UK bookmaker reviews

100% Welcome Bonus up to £50 Promo Code: TONY50

Bet Now

In order to activate this bonus on the personal TonyBet account, please, enter the bonus code TONY50 when a deposit is made and wager your deposit 10 times on betting markets with odds of at least 1.65 within 30 days. This offer is available to new players who made the first deposit. All players must be 18+ years old and of a required legal age to gamble. Odd/even, no action (bets made on both sides of the same bet), cancelled bets, replicated bets and bets that have had their odds equated to 1 are not included into the bonus wagering.

Bet £10, Get £30 in Free Bets + £10 Casino Bonus

Bet Now

Sig terms: Min deposit of £/$/€10 • A qualifying bet is a ‘real money’ stake of at least £/$/€10 • Min odds 1/2 (1.50) • Free Bets credited upon qualifying bet settlement and expires after 7 days • Free Bet stakes not included in returns • Deposit balance is available for withdrawal at any time • Withdrawal restrictions & full T&Cs apply

Bet £10 Get £10

Bet Now

*18+. New UK customers only. Min bet £10 to receive £10 Free Bet (placed and settled 35 days from registration). Min odds of 3/5. Free Bet credited at qualifying bet settlement and placed within 35 days. T&C's apply. Please gamble responsibly,

Get up to £100 in Free Bets + up to 100% in Boosts

Bet Now

18+, New customers only. Deposit + bet £20-£100. Must Deposit £50 and opt in for marketing preferences for Boosts. Boosts credited 24 hours after deposit. Full T&Cs apply.

EXCLUSIVE: Bet £15, Get £10

Bet Now

18+, Welcome Bonus: New Players only, 1st Deposit, Min Deposit,: £10, max £10 free bet valid for 14 days, bets must be placed at odds of 1/1 or greater and be settled within 14 days of placement. System bets not eligible. Neteller,Skrill and Paypal not eligible. T&Cs apply

Bet £10, Get £10 + 50 Extra Spins

Bet Now

New customer offer; Place first £10 bet on sports with 3 legs at odds of 1.3 or greater per leg; Free Bet and Extra Spins credited after the qualifying bet has settled; Free Multiple Bet must contain 3 legs at odds of 1.3 or greater per leg; Free Bet and Extra Spin stakes not returned; No wagering requirements on winnings; £200 max win; T&C’s apply; 18+

Open Account Offer - Up to £100 in Bet Credits for new customers at bet365

Bet Now

Min deposit £5. Bet Credits 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. 18+. New players only.

Bet £20, Get £20 in Free Bets

Bet Now

Qualifying bet must be min odds of 1/2 and cannot be placed in-play or cashed out. E.g. Place a £20 bet at minimum odds of 1/2 on the first race of the day of the Tuesday of the Festival.When that bet has been settled, you will be given a free £5 fixed odds bet to use that day.You will then be given a free £5 bet on the Wednesday, on the Thursday and finally on the Friday.New customers only. See full T&Cs Apply. 18+ begambleaware

Bet £20, Get £10

Bet Now

18+ New Customers Only. Minimum Deposit and wagering on sport to activate the Free Bet is £20. Customers who deposit using Neteller, Paysafe, Skrill or Skril 1-Tap will not be eligible for any free bet

Double the Odds, Paid in Cash

Bet Now

18+ New Customers Only. Bet must be placed using real money in combination with the Odds Boost Token. Offer applies to Sport bets only. Maximum total stake is £10. Each way bets are a maximum of £5 each way (£10 total stake). Customers have 60 days after registration to use the Odds Boost token. T&Cs apply.

Up to £20 Free Bet If your First Settled Bet Doesn't Win

Bet Now

New Customers. First settled bet £/€10 (£10 E/W+) - £/€20 (£20 E/W+) at odds 2.0+ qualifies. If first settled bet loses, free bet credited within 24 hours of bet settlement, use within 7 days, Stake not returned. Full T&Cs Below.

£40 Sports Welcome Bonus

Bet Now

18+. New depositing players on only. Promotion from 11/02/2020 until further notice. First deposit min £10. Qualifying bet: min. £10 accumulator bet with at least two selections with min odds of 1/2 (1.50) per selection. Bonus: 50% of the amount of the first bet. Max. bonus £40. Min. 6x wagering with bonus on min odds of 1/2 (1.50) before withdrawal. Deposit method restrictions. Bonus valid for 7 days. Full T&Cs apply.

Bet £10 Get £20

Bet Now

New customers only, min deposit and bet £10 (£20 if E/W bet) from UK Debit card only. Paypal not accepted. Min odds evens (1/5 per multi selection). 4x £5 Free Bets valid for 7 days, stake not returned, no cash out. T&Cs apply.

Bet £20, Get a £20 Free Bet

Bet Now

New customers only. Qualifying bets must be placed before midnight 31/12/20. £10 Free bet credited when your first bet on Glory Goals settles. Min odds 1.6. Free bet min odds 1.1 and must be used in 7 days. 18+ BeGambleAware. Full terms apply.

Bet £10, Get a £15 Free Bet

Bet Now

18+, T&C Apply. New customers only. Max one £15 Free Bet. Qualifying bets must be placed at odds of 2.0(1/1) or greater. Paid as a bonus token with min odds reg. Further T&Cs apply

Most regular bettors in the UK have accounts with multiple betting sites and bookmakers, giving them the flexibility to get the best odds and take advantage of free bet offers. But it still takes a bit of astute analysis to ensure you're punting with the best online bookmakers and not some fly-by-night operator who offers bad odds, slow payouts and constant site bugs. Our quick guide gives you the lowdown on what to consider when choosing bookmakers online, how to find the best betting sites, how to choose a top mobile betting site and finding sites with top-rated event coverage.

What to Consider When Choosing Bookmakers Online

Choosing your favourite online bookmakers in the UK is partly dependent on your betting preferences and personal taste, though we're offering up eight factors to tick off your check list when seeking a new betting site:

  • Regulated betting sites: Most new online bookmakers in the UK are fully regulated by the likes of the UK Gambling Commission or the Malta Gaming Authority, but be sure to double check to avoid betting with dubious sites.
  • Site design and navigation: Betting sites in the UK have their own distinctive look and energy, with different layouts suiting different punters. Think about whether you need a high energy site, or one with a chilled out vibe.
  • Free bets and bonus: There's never been a better time to be a punter when it comes to the bonuses and free bets from UK bookmakers on the web. They want your custom, so take advantage of some great offers. Be sure to check the terms and conditions to ensure it's worth snapping up.
  • Live in-play betting: The live betting bookmaking market continues to grow, but it's still worth checking that a new site offers the markets and bet types that suit your preferences.
  • Range of markets: The best online bookmakers offer either a huge range of global markets, or high-class niche options. Be sure to identify sites that cater for your best betting markets.
  • Banking options and support: The best bookmakers in the UK offer a wide range of options when it comes to banking, though make sure you can deposit and withdraw with the same option.
  • Blog quality: The best betting sites in the UK feature excellent betting advice, with some legitimately great tips. Don't dismiss the new sites – there are some excellent blogs and vlogs being launched.
  • Good reviews: Online bookie reviews are always a good way to get a feel for new bookie sites and bonus offers via review sites, word of mouth and social media.

How to Decide Which Online Betting Site is Best?

Some well-established online bookies are household names in the UK, but with many innovative new players in the industry, finding the best betting sites takes a bit of work. The three best strategies are word of mouth via friends, quality online review sites such as and signing up to a new betting site in the UK and giving it a test run via your regular device.

Leading review sites are the quickest way to find new sites, ensure they're safe and reliable, give you a fast rundown of products and check the odds and markets – in addition to offering bonus codes and free bet information.

Does the Bookmaker Offer Mobile Betting?

The chance to bet and cashout with in-play betting is rapidly becoming a must for smart bettors, offering a concept that's entertaining and potentially a profitable long-term strategy. If you're out and about and want to get a bet on, it's much easier to load up a mobile betting site or bookie app via your phone, than carry your laptop around; it's also way more discreet. Any quality bookmaker in the UK should either have a site that works seamlessly when switching devices, or have a free app to use when betting via your phone. Before registering with a site, it's worth checking which options they offer and whether the site is compatible with your mobile.

What Events and Markets are Offered?

As the internet betting industry continues to evolve, bookmakers online are continuously looking for innovative ways to deliver bettors different options and unique products. Increasingly, we're seeing bookmakers offer a vast range of markets across global sports, while others focus on optimising specific niches, such as in-play betting options, a core sport like football, or emerging products like e-Sports. It's therefore key for punters to analyse the markets and bet types available to see if they cater for their key betting preferences. Even with a sport like football, which is probably universally offered by all bookmaker and sportsbook websites, you can find big differences with the depth of betting options available, both pre-match and in-play.

Some sites also offer bonuses related to specific sports, such as extra horse racing places or price boosts on football accumulators, so digging into the bookie's product can find you the best sites to take some extra value from.