What Contribution Rates Actually Mean
Every wagering requirement attached to a casino bonus hides a second rule that players often overlook: the contribution rate. This percentage determines how much of each pound you stake counts towards clearing the playthrough. Stake £10 on a slot at a 100% contribution rate and the full £10 reduces your remaining requirement. Stake the same amount on a game weighted at 20%, and only £2 counts. Read more about this at MobileFreeSpins slots sign up bonus.
Contribution rates exist because games carry different house edges. Slots typically contribute 100%, while roulette, blackjack and baccarat sit far lower , often between 10% and 50% , because low-margin play could otherwise clear bonuses cheaply. Some table games are excluded entirely.
The maths matters more than the headline figure. A £20 bonus with 35x wagering means £700 of qualifying play at 100% contribution. If you clear it on a game weighted at 25%, you need £2,800 of stakes , a fourfold increase in effort and risk.
Contribution Rates by Game Type
UK-licensed operators publish contribution tables in their bonus terms, and patterns are consistent across the market. The figures below reflect typical weighting, though individual sites vary and the terms always take precedence.
| Game Type | Typical Contribution |
|---|---|
| Slots | 100% |
| Scratchcards and keno | 100% |
| Video poker | 20-35% |
| Roulette | 10-20% |
| Blackjack and baccarat | 10-20% |
| Live dealer games | 0-10% |
Free spins tend to follow their own rules. Winnings from spins usually land in a bonus balance with a set playthrough, and the contribution table applies to that balance once you start wagering. Always check whether spins are restricted to specific titles.
One practical shortcut: bonuses marketed as low or no wagering sidestep the issue almost entirely. A 50 free spins no deposit no wager offer, or a 70 free spins no deposit no wager deal, lets you keep what you win without clearing anything , contribution rates become irrelevant. For players who dislike arithmetic, these are the cleanest promotions on the market.
Where wagering does apply, sticky bonuses , where the bonus itself is deducted before withdrawal , behave differently again, since you need to track both the contribution rate and the withdrawal mechanics.
How to Use Contribution Rates When Choosing Bonuses
Start with the effective cost of each offer. Multiply the wagering requirement by the reciprocal of the contribution rate for your preferred game. A 40x requirement at 50% contribution is really 80x. Compare that effective figure across bonuses rather than the advertised multiplier.
Match the bonus to the games you enjoy. If you play mostly blackjack, a slots-heavy bonus with a 10% table weighting is poor value; a deposit £10 and get 200 free spins with no wagering package may suit you better, since it removes the clearing problem. Conversely, slots players can usually take advertised multipliers at face value because weighting is 100%.
Watch three traps in the terms:
- Game exclusions that remove your favourite titles mid-wagering
- Maximum bet caps, commonly £5 per spin, which slow clearing considerably
- Time limits, often 7 to 30 days, that make high playthrough unrealistic
Finally, remember that all bonuses from UK-licensed operators sit behind deposit limits, affordability checks and self-exclusion tools under Gambling Commission rules. Treat contribution rates as one part of the decision , alongside stake size and the realistic chance of clearing , and you will get far more from every offer.