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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 2023.

BETFRED CASINO

Get :
Up to 200 Free Spins (No Wagering Requirements) when you Stake £10 (Code: WELCOME200)
18+ Only. Min. deposit is £10. New players only. T&C's Apply. Read the full T&C's Apply and BeGambleaware #ad

Betfred Casino Review

T&Cs Apply

New customers only

18+ Only. 200 Free Spins. Min. deposit is £10. New players only. T&C's Apply

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MR REX CASINO

Get a:
100% Deposit Bonus up to £200 + 100 Spins on Legacy of Dead
18+. Min deposit £10. New players only.T&C's Apply and BeGambleaware #ad

Mr Rex Casino Review

T&Cs Apply

New customers only

18+. New players only. Min deposit £10. Bonus funds are 100% up to £100. Bonus funds are separate to cash funds and subject to 50x wagering requirement. Only bonus funds count towards wagering contribution. £5 bonus max bet. Bonus funds must be used within 30 days. Spins credited after third deposit. Affordability checks apply. Terms Apply.

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CASIPLAY CASINO

Get a:
100% Deposit Bonus up to £200 + 100 Bonus Spins on Starburst and Book of Dead
18+. Min deposit £10. New players only.T&C's Apply and BeGambleaware #ad

Casiplay Casino Review

T&Cs Apply

New customers only

18+. New players only. Min deposit £10. Bonus funds are 50% up to £50. Bonus funds are separate to cash funds and subject to 35x wagering requirement. Only bonus funds count towards wagering contribution. £5 bonus max bet. Bonus funds must be used within 30 days.. Affordability checks apply. Terms Apply.

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LUCKSTER CASINO

Get :
100% Deposit Bonus up to £200 + 100 Free Spins
18+. Min deposit £10. New players only.T&C's Apply and BeGambleaware #ad

Luckster Casino Review

T&Cs Apply

New customers only

18+. New players only. One offer per player. Min Dep £10. 1st Dep offer is 100% up to £200 + 100 Bonus spins. Spins expire after 24 hours of being issued. Bonus funds separate to Cash. Wager Req of 35x Deposit + Bonus apply. Terms Apply. BeGambleAware.org.

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SLOTS N’ PLAY

Get a:
100% Deposit Bonus up to £100 + 150 Bonus Spins
18+. Min deposit £10. New players only.T&C's Apply and BeGambleaware #ad

Slots N' Play Review

T&Cs Apply

New customers only

18+. New customers only, min deposit £10, wagering 35x, Max bonus is 100% up to £100. Full T&C’s apply.

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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

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