Find More Fun at BonusFinder

Who Are BonusFinder?

We are a group of gaming enthusiasts who have been working in the gambling industry for over a decade, either as professional players or working with major international casinos. We set up the BonusFinder site to help ordinary players get the most out of their casino experience, by sharing our knowledge and presenting you with the best UK bonuses and free spins all in one place.

We only recommend casinos that we have tried and tested ourselves, and we compare the strengths and weaknesses of each site to help you make an informed decision before you play for real money.

Why Trust Our Opinion of the Best Casinos?

As well as being gambling experts, we also love playing live casino games and slots, so we are well aware of what makes a good gaming site. We have an extensive checklist when we rate a casino, and always consider the following:

• Every casino we list is fully licensed by the UK Gambling Commission, and uses the latest encryption software to keep your data and money safe.
• We check the small print in the bonus T&Cs carefully to make sure they are player friendly, and highlight any significant terms to you on our list
• Before writing a review our testers fully audit a casino site. What we say is based on our first-hand experience of playing online.
• We make sure that the casino site works well in terms of speed and performance on desktop, smartphones and tablets. We test drive both the website itself and the mobile app if available.
• Our ranking criteria takes into account a number of factors, and is therefore unbiased and independent from the casino operators.
• Our list of bonuses is verified and updated every single week. You will always get the latest offers and current promo codes from our site.

How To Choose The Best Casino For You?

Although we provide you with all the information you need to compare the latest UK casinos and bonuses, you should consider the following aspects when deciding which site is the best for you:

• Minimum Deposit: Make sure you choose a bonus that suits your budget. We have a range of low deposit offers available from a £1 deposit up to £20. We also have an extensive list of free spins with no deposit required.
• Banking Options: All British casinos accept deposits by debit card, but many players prefer the added security of using an eWallet at a PayPal Casino, or the ease of Pay by Mobile casinos.
• Wagering Requirements: The amount of times you need to playthrough your bonus will dictate the amount of time you need to play at the site. If you want to withdraw your winnings fast then lookout for free spins no-wagering bonuses.
• Software Providers: There is a wide range of game developers creating online slots and live casino games. Most British sites have all the top slot games from major providers covered, like Microgaming and NetEnt, but check out the selection if you want to play games from smaller studios like Yggdrasil or No Limit City.
• Live Casino Games: we love playing online Roulette and Blackjack with a real dealer, but these games are often excluded from standard casino welcome bonuses.

What Are the Best UK Gambling Sites?

Every casino you find on our site has passed our stringent review and verification processes, so you can choose any of these with confidence.

The casinos we are talking about the most in September 2025, include some house-hold names and some brand-new sites. Check out our full casino reviews to get the low-down on the best UK casino bonus sites:

• 888 Casino is one of the biggest gambling sites in the UK and was founded back in 1998. They have an excellent selection of popular games and exclusive titles, and has a generous new player bonus.
• Unibet were founded in 1997 as a telephone betting service, and today they are one of the best UK gambling sites. They will give all new customers who want to try their casino £40 when they deposit £10.
• bet365 was founded in 2000 and is a sports betting site that also have lots of slots, live casino games, and no-wagering bonuses.
• Betfred was founded in the 1960s as one of the first off-site bookmakers, and today they have an excellent online casino with a generous wager-free spins offer.
• Grosvenor Casinos are the UK’s biggest chain of physical casinos with a history going back to 1966. Their online site launched in 2007 to allow punters from across the country to play from the comfort of their own homes.
• Betway was established in 2006 and provides online casino games, slots, and sports betting all in one place. Their new casino bonus gets you 100 free spins for £10 with no wagering on what you win.
• The Rialto launched their casino website in 2022 and is a still relativity new place for online gambling but is very popular with players. The live casino games offering is especially good.
• Mr Vegas was founded in 2020, and they have a top-notch online casino with well over 6,000 different games to choose from.
• Videoslots were established in 2011, and they have the largest selection of online slot games of any UK casino with over 8,000 at the last count.
• Mr Green Casino has been a great place for online gambling since they were founded in 2007, and they have been part of the William Hill group since 2019.