Slots and bonus terms: where wagering really happens
If you take a casino bonus, slots are almost always where the wagering gets done. They tend to carry the highest weighting, which is exactly why the bonus terms spend so many lines on them. This page is not a list of favourite games — it is a guide to how slot play interacts with the conditions attached to bonus money, so you can tell in advance whether a session moves you toward a withdrawal or quietly away from it.
Why slots are the usual route to clearing a bonus
Most bonus terms include a contribution table: a percentage showing how much of each bet counts toward the wagering requirement. Slots typically sit at the top of that table, often at 100%, while table games and live dealer games count for much less. That makes slots the fastest way through a turnover target — but only if the slot you open is not on the exclusion list.
The contribution table: what to look for
| Slot type | What to check in the terms | Common trap |
|---|---|---|
| Standard video slots | Weighting and the list of excluded titles | The game accepts bets even though it is excluded |
| High-RTP slots | Whether they count at a reduced rate | Progress moves slower than you calculated |
| Jackpot slots | Whether bonus money may be used on them at all | A jackpot win with bonus funds can be voided |
| Feature buy | Whether buying a bonus round is allowed during wagering | One purchase can cost you the whole bonus |
Worked example: how many spins a target means
Say a €50 bonus carries 35x wagering on the bonus amount, so the turnover is €1,750. At €1 per spin on a slot weighted at 100%, that is 1,750 spins. If the same slot counted at 50%, you would need €3,500 of bets — 3,500 spins at the same stake (illustrative example, not an Irwin term). With a slot returning around 96%, the expected loss on €1,750 of turnover is roughly €70, and on €3,500 roughly €140. The weighting decides whether the bonus is worth having.
Max bet and volatility
While a bonus is active, the terms usually cap the size of a single spin. Extreme-volatility slots tempt players to raise the stake to chase a feature; one spin over the cap can be grounds to cancel the bonus and any winnings made with it. Check the limit before you start, and re-check the stake every time you switch games, because some slots remember your last bet size. Our game guides, such as Fire In The Hole 3 or Fire Joker 100, list only the facts we can source.
A short checklist before you spin with bonus money
- Find the weighting for slots and the list of excluded titles.
- Write down the maximum bet per spin in euros.
- Check whether feature buys are allowed during wagering.
- Note the deadline and work out how many spins per day it implies.
The full method for turning a multiplier into a euro figure is on our wagering guide. For other categories, compare with table games and live casino, where weightings tend to be lower.