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300% SLOTS DEPOSIT BONUS

A 300% slots deposit bonus gives you triple the amount of money to play with.

With a 300% bonus, if you make a deposit of £100 you will have £400 to play with!

Below we have created a list of the best UK slot sites offering 300% casino deposit bonuses. All the casinos adhere to UK gambling laws and licenses and are completely safe for you to play in 2021.

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5.0 rating
Get :
Deposit £10 Get 50 Free Spins
18+ Only. 50 Free Spins on Book of Dead. Min. deposit is £10. New players only. Game: Book of Dead. Spin Value: £0.10. OJO’s Rewards and Game Play policy applies. T&C's Apply Read the full terms and conditions
T&Cs Apply
New customers only

18+ Only. 50 Deposit Free Spins on Book of Dead. Min. deposit is £10. New players only. Game: Book of Dead. Spin Value: £0.10. OJO’s Rewards and Game Play policy applies. T&C's Apply
Get a:
100% Deposit Bonus up to £100 + 10% Cashback
Minimum first deposit of £20 required to participate. New customers only, min deposit £20, wagering 35x, max bet £5 with bonus funds. Max bonus is 100% up to £100. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Cashback is cash with no restriction. Full T&C’s apply terms and conditions
T&Cs Apply
New customers only

New customers only, min deposit £20, wagering 35x, max bet £5 with bonus funds. Max bonus is 100% up to £100. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Cashback is cash with no restriction
4.5 rating
Get a:
100% Deposit Bonus up to £123 + 10% Cashback
New players only, Maximum bonus is £123, Max bet with bonus is £5, No max cash out, Wagering is 50x - Skrill & Neteller excluded, Eligibility is restricted for suspected abuse, Cashback is cash, so no wagering, Cashback applies to deposit where no bonus is included. Full T&C’s apply terms and conditions
T&Cs Apply
New customers only

New players only, Maximum bonus is £123, Max bet with bonus is £5, No max cash out, Wagering is 50x - Skrill & Neteller excluded, Eligibility is restricted for suspected abuse, Cashback is cash, so no wagering, Cashback applies to deposit where no bonus is included. Full T&C’s apply
4.5 rating
Get :
100% Deposit Bonus up to £300 + 10% Cashback
18+ Only. Min. deposit is £10. New players only. T&C's Apply. Read the full terms and conditions
T&Cs Apply
New customers only

18+ Only. 100% Deposit Bonus up to £300 + 10% Cashback. Min. deposit is £10. New players only. T&C's Apply
4.3 rating
Get a:
100% Deposit Bonus up to £99 + 99 Bonus Spins and 10% Cashback
New customers only, min deposit £20, wagering 40x, max bet £5 with bonus funds. 100% up to £99 bonus + 99 bonus spins on 1st deposit. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Full T&Cs apply terms and conditions
T&Cs Apply
New customers only

New customers only, min deposit £20, wagering 40x, max bet £5 with bonus funds. 100% up to £99 bonus + 99 bonus spins on 1st deposit. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Full T&Cs apply

PLAY WITH A 300% SLOTS DEPOSIT BONUS

Casinos usually offer players 100% deposit bonuses. Every now and again a casino will double this to 200% but it is extremely rare for an online casino to offer a 300% bonus.

We have sweeped the casino industry to bring to you the casinos that are currently offering a 300% deposit bonus.

Don’t forget, 300% bonuses will usually come with terms and conditions attached to them which we will detail below.

TERMS AND CONDITIONS OF 300% DEPOSIT BONUS

You should check the terms and conditions of all casino bonuses.

In our table of 300% deposit bonus casinos, we have detailed the terms and conditions for you.

WHY CHOOSE A 300% BONUS?

  • Gives you a huge starting bankroll
  • Allows you to test lots of slots without risking too much of your own money, and instead play with the casinos bonus funds

OTHER SIMILAR BONUSES

Also, don’t forget to check out our full list of slots bonuses.

CONTRIBUTORS

jean prince

Greetings, I’m Jean Prince

Jean Prince, also known as ‘The Hawk’ in our newsroom is the editor in chief at SlotsHawk.com. He always keeps a hawk eye on the slots market and never lets anything important slip out of his sight.

Editor in Chief since 2020