Casino bonuses, explained properly
Welcome offers can add real value to your first deposit — or tie your money up in conditions you didn't expect. Here's how to tell the difference.
What is a welcome bonus?
A welcome bonus is an incentive casinos offer to new customers, usually tied to your first deposit. It might add bonus funds to your balance, give you free spins on a particular slot, or both. Bonuses are marketing — they are designed to encourage you to try a casino, and they always come with conditions.
The golden rule: a bonus should never change how much you planned to deposit. Decide your budget first, then see whether an offer adds value within it.
The main types of offer
Deposit match
The casino matches a percentage of your deposit with bonus funds. A 100% match on a £50 deposit adds £50; a 200% match adds £100. There is always a maximum — "up to £200", for example. On our list, 888casino, 32Red, Lottomart, Fabulous Vegas and All British Casino offer matched deposits.
Free spins
A set number of spins on one or more named slots, each at a fixed stake (often 10p). Winnings may be paid as cash or credited as bonus funds that must be wagered. Unibet, Lottomart, Fabulous Vegas and MrQ include spins in their welcome offers.
No-wagering offers
Any winnings go straight to your cash balance and can be withdrawn immediately. These tend to be smaller in headline value but are far simpler. MrQ's welcome spins carry no wagering.
Fixed casino bonus
A set amount of bonus credit — such as £20 — unlocked after a qualifying deposit or spend. Check how long you have to use it.
Wagering requirements
Wagering (sometimes called "play-through") is the number of times you must bet your bonus funds before winnings from them become withdrawable cash.
| Bonus | Wagering | Total you must bet |
|---|---|---|
| £20 | 10x bonus | £200 |
| £50 | 5x bonus | £250 |
| £100 | 10x bonus | £1,000 |
| Free spins | No wagering | £0 — winnings are cash |
Under UK Gambling Commission rules that apply from January 2026, wagering on casino bonuses can be no more than 10 times the bonus amount. Lower is better. Also check whether wagering applies to the bonus only, or to the bonus and your deposit.
The significant terms to check
UK operators must clearly show the "significant terms" of any offer. Before you opt in, look for:
- Minimum deposit — the smallest deposit that qualifies (often £10 or £20).
- Eligible payment methods — some e-wallets may be excluded from welcome offers.
- Expiry — how long you have to claim, use spins, and complete any wagering.
- Game contribution — slots usually count 100%, while table games may count less or not at all.
- Maximum bet — a cap on stake size while playing with bonus funds.
- Maximum win — some offers limit how much you can win from bonus funds or spins.
- Opt-in — whether you need to tick a box or enter a code to claim.
Working out real value
A large headline figure isn't automatically better. A 100 free-spin offer with no wagering can be worth more in practice than a bigger matched bonus with conditions that are hard to meet. Ask yourself:
- Would I play these games anyway?
- Can I realistically meet the conditions within the time limit, at stakes I'm comfortable with?
- Am I depositing only what I had already planned to spend?
If the answer to any of these is no, it is fine to decline the offer — you can still play without a bonus.
Quick glossary
- Bonus funds — credit that can be played but not withdrawn until conditions are met.
- Cash balance — your real money, which can be withdrawn at any time.
- RTP — return to player: the theoretical percentage of stakes a game pays back over a very long period. It does not predict individual sessions.
- Volatility — how often and how large a game's wins tend to be. High volatility means bigger but rarer wins.
- KYC — "know your customer": the identity and age checks every UK casino must carry out.