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Up to £200 Cash Bonus + 100 Free Spins

Best 300% Casino Deposit Bonus Offers

Last update
June 18th, 2024
Wagering Advisers Editorial Team
Looking for the best online casinos in the UK with a whopping 300% deposit match bonus? Look no further than Wagering Advisers! Our team has reviewed and ranked the top online casinos offering this incredible bonus, ensuring that you have access to the most lucrative 300% bonus deals in the market.

Best Casinos With 300% Deposit Bonus In UK

Up to £6000 on first three deposits
65x Wagering
Expert rate
Min deposit
#ad New Players only. 1st, 2nd and 3rd ever deposit: spin multiplier wheel and win a Matchup Bonus up to 10X your deposit amount (£2,000 max bonus), £10 min fund for all 3 offers, 65x Bonus wagering requirements, max bonus conversion to real funds equal to lifetime deposits (up to £250) full T&Cs apply.
Wager £10 Get £50 in Slot Bonuses
40x Wagering
Expert rate
Min deposit
18+ New customers only. Opt in and wager £10 on selected games within 7 days of registration. Get 5 x £10 bonus for selected games with up to 40x wagering. Bonuses expire in 30 days. Max redeemable from bonuses £1,250. Debit Card/Apple Pay payments only. T&Cs Apply, see below. | Please gamble responsibly
Bonus £300 + 100 Free Spins
35x Bonus + Deposit
Expert rate
Min deposit
#ad 18+ New players only. Min Dep £20. Max Bonus Bet £5. Offer: 100% of 1st deposit up to £300 + 100 Zee Spins on Starburst (first 10 credited on 1st deposit; rest credited at 07:00GMT at 10/day) + 500 Zee Points. Spins expire after 23:59GMT on day they’re credited. Winnings from each 10 spins capped at £50 & credited as bonus. Bonus funds expire after 30 days, are separate to Cash funds, & subject to 35x wagering of bonus + deposit amounts. Affordability checks apply. Terms Apply Play Responsibly.
100% Bonus up to £100 +15% Cashback
30x Wagering
Expert rate
Min deposit
#ad New UK Customers only, opt-in Required, 100% Deposit Bonus up to £100 on first deposit. Min. deposit £10. 30x wagering requirements for deposit and bonus funds. 15% Cashback amount calculated based on net deposits. Cashback only eligible if balance does not exceed £10 in 30 days. Play responsibly •
Deposit £10 Get 50 Free Spins
20x Wagering
Expert rate
Min deposit
#ad 18+. Play Safe. New customers using Promo code M50 only. Opt in required. 1x per customer. Mining Pots of Gold™ only. Min £10 stake. Max 50 Free Spins at 10p per spin. Free Spins expire 24 hours from issue. Max redeemable £30. Eligibility rules, game, location, currency, payment-method restrictions and terms and conditions apply.

What is a 300% Deposit Bonus?

When players deposit with an online casino, they can receive extra funds from the casino as part of a deposit match deal.

Simply put, a 300% casino deposit bonus is when a casino site matches your first deposit up to a certain amount. In this case, online casinos with a 300% deposit offer will triple your bankroll.

Is it safe to play at a casino offering 300% deposit match bonuses?

Yes, it is safe to play at a casino offering 300% deposit match bonuses as long as it is licensed and regulated by the UKGC or another reputable authority.

However, you need to understand the bonus terms to benefit from a 300% bonus match.

Advantages and Disadvantages of 300 Casino Bonus

If you have experience playing video slots, you probably already know that it only takes one lucky spin to score a massive win. Keeping that in mind, the most obvious advantage of the 300 deposit bonus UK has to be the fact that you have more chances at scoring that spin. Before you head out to one of the casinos on our list to collect your bonus, let’s check out some pros and cons.


  • Having a large bonus balance lets you play slot games with high volatility.
  • You can place larger wagers on slot spins. However, you must check the maximum allowed bet first.
  • With a tripled bonus balance, you can test your luck on new titles that you might not have considered otherwise.


  • The only real drawback is that you need to wager the entire bonus balance. Depending on the online casino, the wagering requirements could be set at around x20-x60. If you plan on making a large deposit, you need to allocate enough time and patience to play through the bonus.

Easy Calculations for Your 300% Deposit Bonus

Discover how easy it is to turn 300% deposit bonuses into winnings at any online casino with our dedicated bonus calculator tool. Enter your bonus details and get instant results. Make smarter decisions and increase your chances of converting your bonus

Example on How to Calculate a 300% Deposit Bonus

There are two components to the deposit bonus: the casino’s percentage match and the maximum bonus balance you can receive.

Let’s look at a concrete example to understand the concept better. If a player deposits £100, casinos will give another £300 on top, making the total playable balance of £400

Calculating a 300% deposit bonus is a simple process that involves a few basic steps. Here’s how to do it:

  1. Determine the amount of your deposit: Let’s say you want to make a deposit of £20. Note, that to activate the offer, you need to meet a minimum deposit requirement set by a casino.
  2. Multiply the deposit amount by 300%: To calculate the potential bonus amount, multiply the deposit amount by 3. For example, £20 x 3 = £60.
  3. Add the bonus amount to the deposit amount: To determine the total amount you will have to play with, simply add the bonus amount to your deposit amount. In this case, the total amount you would have to play with would be £80 (£20 of your deposit + £60 free bonus cash).

It’s important to remember that most online casinos have a maximum bonus cap, so be sure to check the terms and conditions of the bonus offer to understand the maximum amount you can receive.

Can I claim a 300% deposit match casino offer multiple times?

It depends on the specific casino’s terms and conditions. Some casinos allow players to claim the bonus multiple times as part of the ongoing promotions for regular players. Others have restrictions on how many times the bonus can be claimed.

Our top pick. The 300% deposit bonus by BetVictor: wager £10 get £30 in bonuses +100 No Wager Free Spins

BetVictor’s casino offer is a top pick for players in the UK looking for a generous 300% deposit match bonus. This bonus provides players with a great opportunity to boost their bankroll and enjoy a variety of casino games.

By depositing just £10, players can receive £30 in bonus cash applicable for slots, table games, and live dealer games. In addition, players will also receive 100 free spins with no wagering requirements and a 7 day expiration period.

How to Claim your 300% Deposit Bonus

  1. Pick a Casino from our List: Check our curated list of casinos that offer 300% match casino bonuses. Rest assured knowing that our team of expert reviewers has manually verified all the entries on our list, and we only recommend casinos that have licenses from prestigious jurisdictions, offer great banking methods, and have competent customer support.
  2. Read More Expert Reviews: Don’t just take our word for it; verify with other casino review sites that the casino’s reputation you have chosen is positive.
  3. Visit the Casino: The first thing we recommend you do when trying to play at a new casino with deposit match bonus deals is to check the bonus terms.
  4. Sign Up and Activate Bonus: From here onwards, the process is very straightforward. Set up a new account by providing your personal information. Once you have verified the account, you can deposit, and the bonus balance will be automatically added to your account. Good luck!

Discover More Deposit Match Bonuses

200 percent match bonus icon

200% Deposit Bonus

200% Deposit Bonus
100 percent match bonus icon

100% Deposit Bonus

100% Deposit Bonus
400 percent match bonus icon

400% Deposit Bonus

400% Deposit Bonus
150 percent match bonus icon

150% Deposit Bonus

150% Deposit Bonus

Common Terms and Conditions

Every casino will have its set of bonus terms and conditions that you need to read before making a deposit. In most situations, the bonus balance will be automatically awarded to your account when you deposit.

Bonus Wagering Requirements

Wagering requirements refer to the amount of money you need to wager before the balance becomes available for a withdrawal.

How hard is it to wager the 300 casino bonus?

For example, if you deposit £10 and receive a 300% deposit bonus UK, you will be playing with £40. If the wagering requirement is at x30 multiplier on a £40 bonus amount, then it means you would need to wager at least £1,200. After you have finished wagering, the whole balance will be turned to cash, and you can request a withdrawal or continue playing.

Can I withdraw my bonus winnings from a 300% deposit match casino offer?

Yes, you can withdraw your bonus winnings from a 300% deposit match casino offer, but only after you have met the wagering requirements.

Time Limits

Casinos will usually limit how long you have until you can clear the wager. In most cases, you can expect a bonus to expire after a week, and if you have not finished the playthrough, the whole balance will be voided.

Another type of limitation might be to impose a cooldown on how long you can take before you claim the promotion. This scenario is most common for newly registered players with five or seven days to deposit and qualify for the bonus match of 300 percent.

Minimum Qualifying Deposit

There will be a minimum deposit to qualify for a 300% casino bonus most of the time. Each casino updates its promotions, and the minimum required deposit can change from one to another.

Wagering Contribution Percentages

In most cases, you can achieve 100% wagering contribution from video slots, keno, or scratch cards because the house’s edge is higher on these games. A game like Blackjack, where the house edge against an inexperienced player is only 2%, will have a much lower contribution to the playthrough requirements.

You can find wagering contribution percentages in the bonus terms and conditions. You can expect Baccarat, Roulette, Blackjack, Craps, and video poker to count anywhere between 10% and 20% towards wagering. Meaning that if you place bets for £10, you will wager £1-2. And slot games would count 100% towards wagering in most cases.

Excluded and Eligible Games

We mentioned above that games like Blackjack or Roulette can have lower wagering contribution percentages, but in some cases, they can be excluded from playing with the bonus altogether. Online slots with very high RTP percentages, above 97%, might also not count towards wagering requirements.

There are cases, albeit rare, where you can only wager the bonus on a specific slot games or titles from the same game provider. You can still play any other video slot on the casino website, but they would not count towards playthrough contribution.

Maximum Allowed Bet

The max bet rule is widespread with most online casinos. Typically the most you can wager on a single spin is £5-10, and if you go above, there are two possible scenarios.

The more lenient version will simply have bets above the threshold not count towards the playthrough requirements. However, going above might result in the entire bonus balance being voided.

How We Rate the 300% Deposit Bonus Offers

Bonus value

We look at the overall bonus value first. Most casinos with 300% deposit bonuses offer extras to attract players. In most cases a batch of free spins might be added to accompany the deposit offer.

Game Selection

We emphasise quality, but we also check that there’s enough variety. You can expect attractive progressive jackpots, titles from highly reputable iGaming providers that are available in demo mode, coupled with fair RTP.
Terms and Conditions

The casino’s terms and conditions could have disadvantageous stipulations to the gambler. We ensure that they are transparent and allow the player to have a fair gambling experience.

Safety and Security

We value player security highly, and we verify that the casinos we recommend are using the latest encryption technology, upgrading their systems periodically to combat threats, and most importantly, are licensed by a highly reputable jurisdiction.

Overall User Experience

We know that you are gambling to have fun and relax after a hard day’s work, and we understand that you don’t want to play on an unresponsive website with poor graphics.

300 Deposit Bonus Slots

When you have a large bonus balance active, it is wise to play slots that have high volatility. The increased balance will significantly improve your chances of triggering bonus rounds and free bonus spins. Even if you hit a dry spell, you will have plenty of bonus balance left to chase those worthwhile rewards.

Check out these highly volatile slots that are ideal for bonus wagering:

  • Gorilla Gold Megaways from Blueprint – 97% RTP with 470,596 paylines and a maximum potential win of x20,000 initial bet.
  • Dead or Alive 2 from NetEnt – 96.82% RTP with a fantastic maximum potential win of x111,111 initial bet.
  • Beauty and the Beast from Yggdrasil – 96.6% RTP with x5,000 initial bet winning potential.

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