?? Best 300% Deposit Bonus Casino Sites
Most British gambling sites will offer new players a casino bonus of 100% deposit match when they first join the site, but a small handful go above and beyond with even bigger percentage matches. Here we present the latest 300+ deposit bonus matches from casinos that will give you more than the average.
These are the best UK casinos and slot sites where new players can claim a bonus of at least 300% on your first, second or subsequent deposit.
| Casino | Maximum Bonus | Wagering Requirement |
|---|---|---|
| Electric Spins | ￡20 + 100 free spins | 60x |
| BetVictor Casino | ￡30 slots bonus | 40x |
| Unibet Casino | ￡40 | 50x |
| Coral Casino | ￡50 | 40x |
You can get a hefty 300% bonus from a few of the best British casinos.
1. Electric Spins: 300% First Deposit Bonus
The casino welcome bonus from Electric Spins will get you ￡20 extra credit when you deposit ￡10, as a 200% deposit boost. Plus you will also receive 100 free spins worth another ￡10, effectively meaning that the value of this deal is 300%. This is a great enticement to try out this exciting new British slots site, and there are plenty of fun games to enjoy with your bonus funds.
2. BetVictor Casino: ￡30 Slots Welcome Bonus
BetVictor have been around since the 1940s, but their online casino site is a relatively new addition. To convince players of its pedigree they are offering all new players ￡30 when they deposit ￡10. This will be delivered as 3 x ￡10 vouchers to play 5 of the best slot games: Fishin’ Frenzy, Big Irish Bucks, Book of Dead, Eye of Horus, and Starburst.
3. Unibet Casino: ￡40 Bonus when you Deposit ￡10
At Unibet you will find a 400% deposit bonus for all new casino players. This is the type of generosity we normally only see from betting sites, and of course Unibet began as a bookies but now boasts a firm choice of slot games and live casino tables.
4. Coral: Deposit ￡10 get ￡50
Coral Casino certainly has not gone to the dogs, and their generous welcome offer is just one of the reasons to check out this gambling site. The current promotion will increase your ￡10 deposit by 500%, giving you ￡50 to explore their wide slots catalogue and live casino games.
?? ￡300 Casino Bonus
Some of the most generous casinos in the UK will offer you a deposit match bonus up to ￡300 when you sign up for a new account. This is three times more than the majority of online casinos offer.
In August 2024 these are the best UK sites with a ￡300 bonus:
1. Rialto Casino
The newest casino site from the Grosvenor Casino group is the Rialto, which streams live games from their London venue and has a strong range of online slots. To claim the full ￡300 casino bonus you will need to make three deposits as the bonus is 100% up to ￡100 on your first deposit, 50% up to ￡100 for the second and third. You will also be able to enjoy 200 megaways spins for Fishin’ Frenzy.
2. Magical Vegas
Magical Vegas is a well designed site that will reward all new players with a ￡300 deposit match bonus at 100%. The real rabbit in the hat though is the 50 bonus spins that come alongside, as these come with no wagering requirements so you can keep what you win!
3. Playzee
When you make your first deposit of ￡10 or more at Playzee they will boost your cash by 100%, up to a max of ￡300. They also add on 100 free spins for Starburst, which is perhaps the most popular online slot game of all time!
All new players can enjoy a bonus of up to ￡300 when they first deposit at Magical Vegas Casino, plus some no-wagering free spins.
?? 300% Slots Bonus
300% bonus offers are great for slot players as they normally let you play any slot games on the online casino site. Plus you will often be able to get some extra bonus free spins on top, letting you try out one particular game at no extra cost.
These are some of our most recommended slots games to try with a 300% slots bonus:
| ?? Online Slot | ? RTP | ?? Volatility |
|---|---|---|
| Starburst | 96.09% | Low |
| Book of Dead | 94.25% | High |
| Gonzo's Quest | 95.97% | Medium |
| Rainbow Riches | 94-96% | Medium |
| Bonanza | 95.98% | High |
| Aloha! Cluster Plays | 96.42% | Low |
| Bigger Bass Bonanza | 96.71% | High |
| Mega Moolah | 88.12% | Medium |
Play more slots with a 300% bonus and extra free spins from one of our recommended casino sites.
? How to Claim a 300% Bonus
Claiming a 300% deposit bonus at a UK casino is easy. Here’s how to register a casino account and claim your 1st deposit bonus:
- Choose a casino deposit bonus from our list: Pick an online casino offer from BonusFinder with the knowledge that we have thoroughly checked and vetted all the sites we recommend.
- Sign-up for a new casino account: You need to input some personal information (full name, date of birth, email address, phone number) to complete the registration process, and you will need to provide some ID when you want to cashout.
- Choose a payment method: Make sure you pick a deposit method that is not excluded from first deposit offers, as some payment methods like Neteller and Skrill are frequently excluded from first deposit casino bonuses.
- Check if you need to add a welcome bonus code: Enter the bonus code from our website when you make a deposit. Many welcome bonuses don’t need a UK promo code nowadays.
- Claim the welcome bonus and start playing: Remember to check your gambling site’s terms and conditions for excluded games, maximum bet limit, wagering requirements and bonus expiry time.
?? What is a Deposit Match Bonus Percentage?
The matched percentage determines how big a casino bonus you get when you deposit. Essentially, the bigger the percentage, the more you get as a casino deposit bonus. A 100% match gets you a casino bonus equal to your deposit, and doubles your dosh. A 200% casino bonus will get two times your deposit as casino bonus funds. A 300% deposit bonus means that the casino will give you ￡3 for every quid you put in.
Every casino deposit bonus will also show the maximum amount you can receive. You cannot exceed this amount no matter how much you deposit. For example if a bonus is 300% up to ￡150 you need to deposit ￡50 to unlock the max bonus amount. If you deposit ￡75 you will still only get a ￡150 bonus as you have reached the maximum bonus cap.
Some casino welcome bonuses also come with free spins on the side. To get these you normally only need to make the minimum qualifying deposit. You might get this slots bonus all at once or it can be credited as daily free spins every time you log in.
Electric Spins has a great bonus for new British players that will give you ￡20 free and ￡10 worth of free spins, making your ￡10 deposit go 300% further.
? Terms & Conditions
There are always terms and conditions attached to a casino deposit bonus. You should make sure you understand these before you make a deposit and claim a welcome offer. The most important factors include:
- Wagering requirements
- Excluded payment methods
- Restricted games
- Bonus expiry
- Maximum wins from bonus fund
Wagering Requirements
One of the most important factors when comparing casino bonus promotions is the wagering requirement you need to meet before you can cash out your winnings. The industry standard is between 35-40x, meaning that you need to play through the value of the bonus that many times before you can make a withdrawal. If you want to take out your real money deposit before you have met the playthrough requirement you will normally forfeit both the bonus funds and anything you won with them.
Some 300% deposit bonuses might be accompanied by wager-free spins, like the ones offered in the new welcome bonus from LeoVegas Casino. These are excellent value deals as you can keep what you win!
You also need to be aware that wagering contributions can vary by game. This is especially important if you want to play Live Casino games, such as Roulette or Blackjack, because these often do not count towards wagering.
Playzee has a great introductory offer for new players with a generous deposit match and free spins.
? Verdict: Three Times The Fun!
We love it when we find a new UK Casino offering a 300% bonus, but you should be prepared that these hefty welcome bonuses often come with higher playthrough requirements than more standard deals. Here are the main advantages and disadvantages of these 300 casino deposit offers:
Last updated:
?FAQ
- How do I turn my casino bonus into cash?
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When you get a 300% deposit bonus at an online casino you have to meet the wagering requirements before your winnings will be converted to real money that you can withdraw. Most casinos ask you to play through the value of the bonus 35x, and it is best to do this on slots with a high RTP% or return to player percentage.
- Who can claim a 300 bonus?
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All the casino deposit bonuses we list can be claimed by any British player, over the age of 18, signing up for a new account at the online gambling site. There is a minimum deposit for most matched bonuses, and check the T&Cs for any excluded payment methods. If you need an exclusive promo code you will find it in our list above.
