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Best Casino Deposit Bonuses

The best casino and slot sites with the biggest and best welcome bonus offers for 2021 – compare casinos to find the best deposit bonus offers for UK players.

Casino & Slots – Best Deposit Bonuses

Best Casino Deposit Bonuses

These days many casino and slot sites eschew traditional welcome bonus offers in favour of bonus spins, a bonus game of chance or some kind of alternative player reward system.  Many players, however, still prefer the old type of offer and in this section we gather the best of them together.


What counts as a good welcome bonus offer?

100% slots bonus up to £100 is a reasonably generous sort of offer to find at an online casino these days and to be included here a casino must do at least that well and ideally improve on it in one of the following ways:

  1. Enhance it with a substantial number of bonus spins
  2. Bigger maximum than £100 on a 100% bonus
  3. Bigger base percentage than 100% (albeit perhaps on a smaller deposit)

Bonus play and wagering requirements

The main advantage to playing with bonus is obvious – it means more play and that means more entertainment value.

The equally obvious drawback to playing with bonus is that the wagering requirement needs to be completed before any winnings can be withdrawn (although this may not be much of an issue for someone who is playing for entertainment).

It actually goes a bit further than that though.  Because almost all casino and slot sites take wagers from a player’s cash balance first and from the bonus only after the cash is exhausted , the player has to lose their deposit in order to get started on the bonus (if they win with the cash and withdraw the winnings, they lose the bonus).  Of course, the same also applies to winnings from bonus spins (if paid as a bonus) although not the bonus spins themselves which are always used first.

Other things to consider

Many casinos specify a list of games that cannot be played with bonus and this almost always includes all progressive jackpots.  Other types of game which may be on the list are:

  • Table games (if not excluded completely, they will contribute to wagering requirements at some very small percentage)
  • Slots with an unusually high Return to Player – such as Bloodsuckers
  • Slots with some sort of collector mechanic for the bonus round – such as Super Monopoly Money and Castle Builder
  • Slots with very high variance – such as Dead Or Alive

Further restrictions on bonus play may be in place, for instance

  • A maximum bet size while a wagering requirement is in place
  • A stipulation that bonus rounds must be played immediately after being awarded, with no other play or deposits allowed in the meantime

It is always a good idea to read the terms and conditions closely before accepting or starting to play with a bonus to ensure that the game you want to play is included and so as not to fall foul of any other restrictions on bonus play.


Welcome offer paid in bingo bonus (bingo bonus can be used only in bingo rooms), new players only. 3x bingo, 50x casino wagering required. Max bet £6.25 until completed. Game weighting applies. 2 day bonus expiry. eWallets excluded. T&Cs apply. 18+ BeGambleAware.org Play Responsibly | Minimum deposit of £10 , Play with £40 and Get 200 Free Spins. | Offer must be claimed within 48 hrs of you registering an account. *18+ BeGambleAware.org Please play responsibly #ad

New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit.18+. Free Spins: on Double Bubble. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply. *18+ BeGambleAware.org Please play responsibly #ad

18+. New players only. Min deposit £20. Bonus spins valid on Starburst only. Bonus funds are 100% up to £222 and separate to Cash funds. 35x (bonus only) wagering requirements. Only bonus funds count towards wagering requirement. £5 bonus max bet. Funds must be used within 30 days, spins within 10 days, otherwise any unused shall be removed. Terms Apply. *18+ BeGambleAware.org Please play responsibly #ad

Key terms: Registration code: BIN050. Bet £10 on Bingo tickets (slots wagering will not count) to receive a £40 Bingo Bonus (x2 wagering), £10 Slots Bonus (x10 wagering) + 30 Free Spins on Dragon’s Luck. Available 30 days from registration to Betfair. SMS verification required for free spins. No wagering on free spins winnings. T&Cs apply. *18+ BeGambleAware.org Please play responsibly #ad

1st dep. of £20-£300, max bonus £300 on selected slots, 50x wagering on the sum of deposit & bonus applies. Max convertible 5x bonus amount received and T&C's Apply. 18+ *18+ BeGambleAware.org Please play responsibly #ad

1st deposit only, must select in the cashier, claim once only, min dep £10, valid 7 days, £20 bingo bonus & wins playable on bingo (excl BOB & BGT), 4 x WR; £10 slot bonus & wins playable on Gonzo's Quest Megaways only, 25x WR, £50 max convertible *18+ BeGambleAware.org Please play responsibly #ad

18+ Full T&C's Apply New players Only. £10 min deposit. £5 max bet using bonus. 40 x wagering applies. Bonus valid for 14 days. 20 Spins on preselected games will be credited instantly + then 20 per day for 9 days. Free Spins valid for 72 hours from credit. Max Free Spins winnings £100. Skrill + Neteller excluded. Always refer to Bonus Terms - www.begambleaware.org *18+ BeGambleAware.org Please play responsibly #ad

New PokerStars Casino registered players only. Min. £10 deposit, debit card only. Opt-in 14 days from registration. 7-day Free Spins expiry. Free Spins valid on Tomb of Ra Classic Slot only. Any winnings credited as cash. Full T&Cs apply. *18+ BeGambleAware.org Please play responsibly #ad