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Casino bonuses come with wagering requirements — the number of times you need to bet the bonus amount before you can withdraw. This calculator shows you exactly how much you need to wager, the expected cost based on RTP, and the realistic probability of converting your bonus into withdrawable funds.
Under the January 2026 UKGC rules, all UK casino bonus wagering is capped at 10x. Use this calculator to compare effective bonus value across different offers.
Reviewed by Alex Reed | Published April 2026
Last updated: April 2026
Most slots are 94-97%
Base wagering before game contribution
Actual amount you need to bet at 100% contribution
Statistical cost at 96% RTP
Deposit + bonus minus expected cost
Low wagering relative to balance with high RTP — good chance of clearing with profit.
200 spins at £5/spin (4s each)
Calculations are estimates based on expected values. Actual results vary due to variance.
A wagering requirement is a multiplier that determines how much you need to bet before bonus funds become withdrawable. A £100 bonus with 10x wagering means you need to wager £1,000 (£100 × 10) before the bonus clears.
Some casinos apply wagering to the bonus only; others to deposit + bonus combined. Always check the terms — "deposit + bonus" wagering effectively doubles the real hurdle.
From January 2026, all UKGC-licensed casinos must cap wagering at 10x. Before the cap, typical UK casino bonuses carried 35x-65x wagering, making effective value hard to achieve. The new cap fundamentally improves bonus value:
Old regime (35x wagering on a £100 bonus): Required £3,500 in wagering. At 96% RTP, expected loss of £140 during wagering — meaning you'd need to finish wagering positive to have any net gain from the bonus.
New regime (10x wagering on a £100 bonus): Requires £1,000 in wagering. At 96% RTP, expected loss of £40 during wagering — giving you a £60 expected positive value from the bonus before variance.
Not all games count equally toward wagering. Slots typically contribute 100%. Table games and live casino usually contribute only 10% — meaning every £1 bet on blackjack only counts as £0.10 toward your wagering.
If you plan to play table games with a bonus, the effective wagering can be 10x higher than the stated multiplier. Use the game contribution field in the calculator to see the true hurdle for your preferred game type.
Most bonuses include a maximum bet rule — often £5 per spin. Betting above this during active wagering can void the bonus entirely. The calculator uses your max bet to estimate how long wagering will take.
Exceeding the max bet is the single most common way players lose bonus funds. Always check the specific limit for your bonus.
When comparing bonuses across casinos:
This is the practical value of the calculator — cutting through marketing headlines to actual mathematical expectations. For broader context, see our UK casino regulation hub.
The calculator provides accurate expected-value calculations based on standard probability math. Actual results vary due to variance — individual sessions deviate significantly from expected values.
Exact probability depends on specific game volatility, not just RTP. The calculator provides a general indicator (low/medium/high) rather than precise odds.
Yes. All UKGC-licensed casinos must comply with the 10x cap from January 2026. Non-UKGC casinos (Curaçao, etc.) may still apply higher wagering requirements.
It's a mathematical expectation across many sessions. Any individual session can be significantly above or below expectation. Use it for comparison between bonuses, not as a prediction of any specific outcome.
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