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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 :
100% Deposit Bonus up to £100 + 300 Starburst Free Spins
18+. Min deposit £10. New UK players only.T&C's Apply and BeGambleaware #ad
Full T&Cs Apply
New UK players only

18+ Full T&Cs Apply. New UK players Only. £10 min. deposit. £5 max. bet using Bonus. 40 x wagering applies. Bonus valid for 14 days. 30 Spins on pre-selected games will be credited instantly + then 30 per day for 9 days. Free Spins valid for 72 hours from credit. Max. Free Spins winnings £100. Ewallets excluded. www.begambleaware.org.
5.0 rating
Get a :
100% Deposit Bonus up to £300 + 100 Bonus Spins on Starburst
18+. Min deposit £20. New players only. T&C's Apply and BeGambleaware #ad
T&Cs Apply
New customers only

18+. New players only. Min Deposit £20. Max Bonus Bet £5. Winnings from spins capped at £50. 100 Zee Spins valid on Starburst (first 10 credited immediately upon first deposit; rest credited at 07:00 GMT at 10/day). Spins must be used by 23:59 GMT of the day on which they are credited to player account, any unused shall be removed. Bonus funds must be used within 30 days. Bonus funds are separate to Cash funds, and subject to 35x wagering (bonus + cash). Full terms apply. BeGambleAware.org.
Get a:
100% Deposit Bonus up to £100 + 10% Cashback
18+. Min deposit £20. New players only.T&C's Apply and BeGambleaware #ad
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
4.8 rating
Get a:
100% Deposit Bonus up to £99 + 99 Spinsane or Joker Pro Bonus Spins and 10% Cashback
18+. Min deposit £20. New players only.T&C's Apply and BeGambleaware #ad
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
4.8 rating
Get :
100% Deposit Bonus up to £50
18+. Min deposit £10. New players only.T&C's Apply and BeGambleaware #ad
T&Cs Apply
New customers only

18+. New players only. One offer per player. Min Deposit £10. Bonus funds separate to Cash. Wager Req of 30x. Terms Apply. BeGambleAware.org.

PLAY WITH A 300% SLOTS DEPOSIT BONUS

300% 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