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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requirement is the total turnover you must generate before bonus funds, and normally anything won with them, can be withdrawn.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.
How RTP Connects to Bonus Wagering
RTP enters the cost of a bonus in one place only. The house edge is 100% minus the RTP, and the expected cost is the required turnover multiplied by that edge. Because a wagering requirement multiplies turnover, it also multiplies every point of RTP: on a £50 bonus at 10x, which needs £500 of stakes, each percentage point of RTP is worth £5.
| Slot RTP | House edge | Expected cost of £500 turnover | Net value of the £50 bonus |
|---|---|---|---|
| 94% | 6% | £30 | £20 |
| 95% | 5% | £25 | £25 |
| 96% | 4% | £20 | £30 |
| 97% | 3% | £15 | £35 |
| 98% | 2% | £10 | £40 |
Three practical consequences follow from that line of arithmetic.
The RTP that counts is the one on the site you play
Many slots are supplied in more than one RTP version, and the operator chooses which one to run. A figure quoted on a review site or by the game provider may not be the figure on your screen. Open the game's information or help panel on the site where you are clearing the bonus and use the number shown there.
Contribution and RTP work together
The full version of the formula is (requirement ÷ contribution rate) × (100% − RTP). This is why high-RTP games are the ones given low contribution rates. Blackjack played well returns around 99.5%, but at a 10% contribution rate the £500 requirement needs £5,000 of stakes, and 0.5% of £5,000 is £25: more than the £20 the same bonus costs on a 96% slot contributing in full. Our guide to game contribution rates covers how operators set these figures.
RTP is an average, not a forecast
RTP sets the expected cost; volatility sets how far any single attempt strays from it. Two slots with the same RTP give the same expected cost over the requirement, but on a high-volatility game more attempts end with the balance gone before the turnover is complete, and a few end well above the average. The step-by-step guide on how to clear a casino bonus deals with stake size and pacing once the game is chosen.
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.
Frequently Asked Questions
What is a casino bonus wagering requirement?
It is the total amount you must stake before bonus funds, and usually anything won with them, can be withdrawn. It is expressed as a multiple: a 10x requirement on a 50 pound bonus means 500 pounds of stakes. The stakes are cumulative turnover, not money you must lose, but turnover has an expected cost and that cost is what determines whether an offer is worth taking.
How do I calculate the real cost of a casino bonus?
Multiply the required turnover by the house edge of the game you will play, where the house edge is 100% minus the return to player. A 50 pound bonus at 10x needs 500 pounds of turnover; on a 96% RTP slot that turnover costs about 20 pounds in expectation, so the bonus is worth roughly 30 pounds net. If the game contributes less than 100% towards the requirement, divide the turnover by the contribution rate first.
What are game contribution rates?
A contribution rate is the proportion of your stake that counts towards clearing the requirement. Slots normally contribute 100%. Table games such as blackjack and roulette commonly contribute between 0% and 20% because their house edge is low, and live dealer tables and video poker are often restricted too. A game contributing 10% means 10 pounds staked counts as 1 pound cleared, so the same bonus needs ten times the turnover.
Is a lower wagering requirement always a better offer?
Not on its own. A 5x requirement restricted to games contributing 20%, with a seven-day window and a cap on winnings, can be worse than a 10x requirement on 100% contribution games with a month to clear it. The multiplier is one of at least five terms that set the real cost, and it is the one operators advertise precisely because it looks like the whole story.
How does RTP affect bonus wagering?
RTP sets the house edge, which is 100% minus the RTP, and the expected cost of a bonus is the required turnover multiplied by that edge. Because the requirement multiplies turnover, each point of RTP is magnified: on a 50 pound bonus at 10x, which needs 500 pounds of stakes, every percentage point of RTP is worth 5 pounds. A 94% slot costs about 30 pounds to clear that bonus and a 97% slot about 15 pounds. Use the RTP shown in the game's information panel on the site where you play, because many slots are offered in more than one RTP version.
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.