300% Casino Bonus: The Best 300 Casino Bonus Offers UK 2021

Don’t want to waste your time trawling through seemingly endless sites for the crown jewels of casino bonuses? Thought not. We’re here to do the leg work for you and show you the best 300% casino bonuses.

Top 300% Deposit Casinos

Viggo Slots
Up to £1000 + 170 free spins
  • Around-the-clock customer support
  • Weekly promotional deals
  • Numerous payment methods for easy transactions
* more terms & conditions apply
William Hill
300% up to £10
  • International brand
  • Massive selection of games
  • Long history as an operator
* more terms & conditions apply
Spicy Spins
300% up to £200
  • Fun site design
  • Simple layout and easily navigated
  • Chilli-themed casino
* more terms & conditions apply
Dr Slot
300% up to £50
  • Excellent on-site graphics
  • Slots focus
  • Large pick of slots
* more terms & conditions apply
300% up to £300 + 100 Bonus Spins
  • Wide range of deposit options
  • Available in multiple languages
  • 24/7 customer service
* more terms & conditions apply
300% up to £2000
  • Cute, animal-theme design
  • Generous promotions
  • Multiple payment options
* more terms & conditions apply
This is Vegas
300% BTC deposit bonus
  • Crypto casino
  • Simple site design
  • Daily ccryptocasinoashback offer
* more terms & conditions apply
300% BTC deposit bonus
  • Multiple payment options
  • Large game collection
  • Excellent VIP program
* more terms & conditions apply
Davinci’s Gold
300% BTC deposit bonus
  • Accepts BTC
  • Multiple other payment options
  • Bold on-site graphics
* more terms & conditions apply
Paradise 8
300% BTC deposit bonus
  • Funky graphics
  • 300+ games
  • Speciality games section
* more terms & conditions apply
300% up to £30
  • Speedy loading time
  • Wide range of promotions
  • Clean site design
* more terms & conditions apply
Old Havana
300% up to £1,500
  • Cuban-themed site
  • 24/7 customer support
  • Large selection of jackpot slots
* more terms & conditions apply
300% up to £1000
  • Sophisticated appearance
  • Varied slot collection
  • Excellent VIP benefits
* more terms & conditions apply
Irish Luck
295% up to £1000
  • Fantasy-themed operator
  • Excellent customer support
  • Wide range of promotions
* more terms & conditions apply
300% up to £500
  • Minimal, monochrome branding
  • Great rotation of promotions
  • Low wagering req.
* more terms & conditions apply
300% up to £60
  • Customer-focused gaming experience
  • Large number of deposit options
  • Excellent VIP benefits
* more terms & conditions apply


What Is a 300% Casino Bonus?

A 300% casino bonus is a massively generous incentive to sign up to a site. Why? Because most casinos only offer 100% deposit bonuses, also known as a Match Bonus. Luckily for us, some casinos are really pushing their welcome bonuses to the limit with a juicy 300% deposit bonus.

Let’s say you deposit £20 for your welcome offer deposit bonus – you’ll receive 300% EXTRA, giving you £60 to spend! Add your original deposit of £20 and you'll get a lip-smacking grand total of £80 to play with on any game – or games – within the casino.


300% Bonus Terms Explained

Not to rain on your casino promotion parade, but there are several aspects you should definitely bear in mind before claiming a 300% welcome bonus.


300% Casino Bonus Cash Out Limits

Casino operators will usually impose a cash out limit on your 300% casino bonus, which is usually a certain amount tied to your deposit. If you deposit £20, you could see a maximum cash out limit of 5x your deposit: £100!

We can’t stress how important it is to check the cash out limit, especially if you’re playing jackpot slots to wager through your bonus. The smart move is to first complete your wagering requirement on a non-progressive slot, then move on and try your luck with the latter. 


Table Weightings

The next question you need to ask yourself is: “Which game should I use my 300% deposit bonus on?” Individual casino games contribute differently to the wagering requirement. Typical table weightings could look something like this, although they may vary between casinos:

  • Slots: 100%
  • Live Dream Catcher: 50%
  • Monopoly Live: 50%
  • Deal or No Deal Live: 50%
  • All live roulette and live blackjack: 10%
  • All other live casino games: 10%
  • All non-live table games: 5%

The reason different games contribute differently is due to the fact that some casino games have a low-risk betting strategy. On roulette, for example, you could place bets on both red and black simultaneously, and as long as zero doesn’t come up, you’re looking at a payout on either red or black. In this way, you could potentially have fulfilled your wagering requirement with a single lucky spin on roulette.


300% Casino Bonus Time Limits

Every promotion will have an expiry date, even if it is ongoing. Reading the T&Cs of your 300% casino bonus is essential in order to gain an understanding of what could happen should certain terms not be met. 

It's vital that you’re able to easily fulfill the wagering requirement within the set time limit. If this is going to be tricky for you at all, we recommend depositing a lower amount, where you can merrily spin away knowing that you’ll be able to comfortably complete the wagering requirement within the time frame.

Accepted Payment Methods for a 300% Bonus

Casinos are now accepting a wider and wider range of payment options, including bank transfers, debit cards, and e-wallets such as NETELLER, Skrill, Trustly, Boku, and PayPal. It’s really important that you check your chosen deposit method is eligible for your 300% bonus, as some casinos do not offer a welcome online casino bonus for e-wallet deposits. It also depends where you're located as there may have different payment methods available to you. 

Unfortunately, cryptocurrencies such as Bitcoin, Etherum, Litecoin, Ripple, or Monero are not currently being widely accepted by UK casinos as deposit methods; however, we're quite certain that this will change in the future as we're already seeing a surge in bitcoin casinos.


Wagering Requirements

Top 300% Casinos With Lowest Wagering Requirements

Spin Up
300% up to £1000 + 100 free spins on Betsoft games
  • 20x wagering req. (40x for players from UK, Greece, and Lebanon)
  • Fun site design
  • Large game collection
* more terms & conditions apply
300% up to £500
  • Minimal, monochrome branding
  • Great rotation of promotions
  • 20x wagering req. (40x for players from UK, Greece, and Lebanon)
* more terms & conditions apply
300% up to £600 (NOT ACCEPTING UK PLAYERS)
  • 20x wagering req. (80x for players from Greece and Lebanon)
  • Easily navigated site
  • Great customer service
* more terms & conditions apply

Wagering requirements are imposed by the casino so that players don’t simply sign up for a bonus, withdraw, and never return. Before you're able to withdraw your funds, you'll be required to play through your bonus (or, in the case of a free spins bonus, your winnings) a certain amount of times – usually between 30x or 40x. 

Let’s imagine a scenario where you've claimed a deposit bonus offering a 300% match up to £100, and you deposit this maximum amount. The wagering requirement is 35x, meaning you'll need to play through £10,500 before you can withdraw your £300 bonus.

Bear in mind the following three points:

  1. Both winning and losing bets contribute to your wagering requirement.
  2. You will lose your bonus if you withdraw your balance while said bonus is active.
  3. Different games contribute differently towards your wagering requirement.

Head over to our article on the best no wagering casino sites to find the lowest wagering requirements around! 


300% Bingo Bonuses

If bingo is your game of choice, you're in luck: bingo sites also offer a 300% deposit bonus for players!

Top 300% Operators

Swanky Bingo
300% up to £120
  • Down-to-earth visuals
  • Multiple deposit and withdrawal options
  • Bingo-specific bonuses
* more terms & conditions apply
Costa Bingo
300% up to £200 + 30 free spins
  • Bingo and slots focus
  • Large number of promotions
  • Excellent VIP program
* more terms & conditions apply
Loony Bingo
300% up to £30
  • Joyful site graphics
  • Bingo and slots focus
  • Large number of payment options
* more terms & conditions apply


300% Sportsbook Bonuses

Preparing for a punt? There’s no better time to take advantage of a 300% sportsbook bonus.

Top 300% Bonus Sportsbooks

300% up to £40
  • Rich history as sportsbook operator
  • Sophisticated, minimal site design
  • Huge range of betting markets
* more terms & conditions apply
300% up to £30
  • Classic sportsbook operator
  • Excellent customer service
  • Incredibly safe and secure site
* more terms & conditions apply
300% up to £300
  • Easily navigated site
  • Ongoing promotional activities
  • Wide range of betting markets
* more terms & conditions apply


Beyond the 300% Welcome Bonus

A little-known casino fact is that, while many promotions appear on-site with eye-popping graphics and in-your-face text, players may also be eligible for offers that are not advertised. Casinos will evaluate your bonus eligibility according to the following factors.


How a Casino Assesses Your Account for Bonuses

If you don’t ask, you don’t get. It’s always worth checking with customer service to see whether you’re eligible for free spins or a further deposit bonus. Although each casino will have a different metric that applies to players and whether they’re eligible for a bonus, it's usually loosely based on:

  1. Win/Loss ratio: Most casinos will only issue further bonuses to players showing an overall loss.
  2. Lost deposits: An operator will only offer a bonus to a player who has lost their most recent deposits (2 or more).
  3. DNC customers are exempt: “Do Not Contact” players may opt out of all marketing communications due to responsible gambling issues, or perhaps just want to be left in peace.

Always remember to ask politely, as any sign that a player is agitated or desperate for a bonus could see your account being flagged for responsible gambling reasons or, in the worst case scenario, closed entirely. Remember that you’re communicating with a real person when contacting customer support. Kindness, courtesy, and consideration go a long way and cost nothing, and it could also help you land a tasty deposit bonus or bag some free spins.



300% Casino Bonus FAQs

❓ How common are 300% casino bonuses in the UK?

300% bonuses are more common than you might think. Always keep in mind that although you’re getting a nice little top-up for your deposit, you will need to wager through this larger amount.

❓ Is a 300% deposit bonus really worth it?

There are two questions you need to ask when taking part in a 300% casino deposit bonus:

  1. How much are you going to deposit?
  2. Are you able to easily complete the wagering requirement?

It’s always possible to reduce the amount of wagering involved by depositing a lower amount, should you feel that you’re unable to meet the wagering requirement within the time limit.

❓ Can I get free spins plus my 300% deposit bonus?

Some casinos do offer free spins with your 300% deposit bonus. Once again, check the T&Cs just so you’re up-to-date with time restrictions, wagering requirements, table weightings, and cash out limits.

❓ What hidden catches can a 300% casino bonus have?

Although we wouldn’t really call these ‘catches’, there are restrictions placed on your 300% casino bonus. You can read all about these time restrictions, wagering requirements, table weightings and cash out limits on this page.

❓ Which casinos offer a 300% deposit bonus?

Every casino listed on this page offers a 300% deposit bonus as a welcome offer. Be aware that this bonus can only be claimed once per casino.

❓ Why should I claim the 300% bonus instead of 150%, 200%, 400%, or 500%?

There is no limitation to the casino bonuses you can claim, and there are many lucrative 150%, 200%, 400%, and 500% deposit bonuses up for grabs.  Before claiming, be sure the terms and conditions are favourable.



We collaborate with industry experts to make sure that our readers are getting the best possible content. All our articles are there to improve your casino experience.


Spin the wheel of fortune!

Canvas not supported, use another browser.
I don't feel lucky