Anyone who has claimed a casino bonus will have met the phrase "contribution percentage". It decides how much of each stake counts towards clearing the bonus, and it quietly changes how long the process takes. This piece is strictly for adults and is general information, not advice.
The basic sum
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Suppose a bonus of £20 carries a 40x requirement on the bonus amount. That is £800 of qualifying bets. If every bet counted in full, £800 is simply £800 of turnover. The catch arrives when different games count at different rates.
Typical contribution levels
Operators tend to follow a loose pattern, though each terms page differs:
- Slots often count in full, or one hundred per cent. - Roulette and blackjack frequently count at a small fraction, sometimes ten per cent or less. - Live dealer tables may not count at all. - Some individual slots are excluded, usually those with very high return or a bonus-buy feature.
At a ten per cent rate, an £800 requirement would take £8,000 of roulette staking. A bet of £2 would need four thousand rounds. That is why people who switch to a table game halfway through often find the progress bar barely moves.
Where to find the figures
Ivybet and most other UK-facing sites publish a bonus terms page that lists contribution rates and excluded titles. It is worth reading before opting in, not after. Look for a table or list, and screenshot it with the date.
Things people overlook
1. Stake caps. A maximum bet while the bonus is active, say £5, is common. Exceeding it can void winnings. 2. Time limits. Seven to thirty days is usual. 3. Order of funds. Some sites use cash first, others bonus first; the terms explain which. 4. Partial play. Bets that cover most outcomes on a table, such as backing red and black together, are frequently disallowed.
A sensible approach
Work out the total turnover, divide it by the days available and compare with how much you would normally play. If the daily figure is far above your usual, the offer does not fit your habits. Declining it is perfectly reasonable, and the games work exactly the same without one.