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Casino Bonus Wagering Requirements Explained
The multiplier on the front of an offer is the least useful number in it. This guide sets out what a wagering requirement actually costs, why game contribution rates usually matter more than the multiplier, and how to check an offer in about two minutes before you claim it.
Educational content. 18+. Verdecto does not promote specific operators.
What a Wagering Requirement Is
A wagering requirement is the total turnover you must generate before bonus funds, and normally anything won with them, can be withdrawn. It is quoted as a multiple of the bonus: 10x on a £50 bonus means £500 of stakes.
The most common misreading is that this is £500 you have to lose. It is not. It is £500 you have to stake, and most of it comes back to you as winnings along the way. What it costs you is the house edge applied to that turnover, which is a much smaller and much more predictable number.
The Only Formula You Need
Expected cost equals required turnover multiplied by the house edge, and the house edge is 100% minus the return to player.
Take a £50 bonus with a 10x requirement, played on a slot with a 96% RTP. Required turnover is £500. The house edge is 4%. The expected cost is £20. Set against a £50 bonus, the offer is worth around £30 in expectation.
Now change one variable. The same offer played on a 94% RTP slot costs £30 instead of £20, and the offer is worth £20 rather than £30. RTP is published for every regulated slot, and it is one of the few numbers in this business that is both disclosed and reliable. Ignoring it discards a third of the value of the offer.
Our wagering requirements calculator does this arithmetic including contribution rates and deposit-match terms, so you do not have to.
Game Contribution: The Number That Actually Decides
Contribution is the proportion of each stake that counts towards clearing the requirement. It is buried in the terms, it varies enormously by game, and it can multiply the true cost of an offer several times over without changing the advertised multiplier at all.
The mechanism is simple. If a game contributes 20%, then £10 staked clears £2 of the requirement. A £500 requirement therefore needs £2,500 of actual turnover, and the expected cost rises in exactly the same proportion: £20 becomes £100.
Typical ranges across the UK market, though every operator sets its own and the terms of the specific offer always override any general table:
| Game type | Typical contribution | Why |
|---|---|---|
| Slots (most titles) | 100% | The standard, and what headline terms assume |
| Jackpot and progressive slots | 0-100% | Frequently excluded entirely |
| Video poker | 0-20% | Low house edge with optimal play, so usually restricted |
| Blackjack | 0-10% | Often excluded outright |
| Roulette | 0-20% | European wheels restricted more than American |
| Baccarat | 0-10% | Commonly excluded |
| Live dealer tables | 0-10% | Treated separately from the RNG version of the same game |
| Bingo and scratchcards | Varies | Set per operator, no market convention |
The logic behind the pattern is consistent: the lower the house edge of a game, the less an operator wants you clearing a bonus on it. Blackjack played competently returns over 99%, which is why it is so often excluded. If a bonus permits table games at a full contribution rate, that is unusual enough to be worth reading twice.
The Terms That Are Not the Multiplier
Five things set the real cost of an offer. Only one of them is advertised.
- The multiplier, and what it applies to. On sites licensed in Great Britain it is now capped — see the 10x wagering cap.
- Game contribution, which can multiply the required turnover severalfold.
- The time limit. A requirement you cannot clear inside the window is worth zero, whatever the multiplier says.
- Maximum stake while wagering, commonly around £5 a spin. It sets a ceiling on how fast you can clear, and interacts with the time limit.
- Maximum win from bonus funds. A cap truncates the upside while leaving the turnover requirement intact, which reduces the value of the offer without appearing to change its terms.
A Worked Comparison
Two offers, both £100 bonuses, both on a 96% RTP slot.
Offer A: 5x wagering, 20% contribution on the eligible games, 7 days. Nominal requirement £500, but at 20% contribution the real turnover is £2,500, costing about £100. Time limit tight. Net expected value: approximately zero.
Offer B: 10x wagering, 100% contribution, 30 days. Requirement £1,000 of turnover, costing about £40. Net expected value: approximately £60.
The offer advertising the lower multiplier is the worse offer by a wide margin. This is not an exotic case; it is the normal reason two offers with similar headlines behave completely differently.
Before You Claim
Confirm the operator holds a Gambling Commission licence. Read what the multiplier applies to. Find the contribution rate for the games you actually intend to play. Check the time limit against a realistic estimate of your own staking. Look for a maximum win cap. Then put the numbers into the calculator and read the expected cost rather than the headline.
If the honest answer is that you would not play at all without the offer, the expected value calculation is not the relevant one. A bonus is a marketing instrument designed to increase how much you gamble, and it succeeds at that far more reliably than it produces a profit for anyone. Our responsible gambling guide covers the tools available if that is the question you are actually asking.
Related
- Wagering requirements calculator — expected cost, total stake and net value of an offer.
- UK bonus wagering cap: the 10x rule — what changed on 19 January 2026.
- Understanding wagering requirements — the longer reference guide.
- Free bet calculator — for sportsbook offers, where the arithmetic is different.