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Bonus calculator: what wagering really costs
Type in the bonus terms and see what clearing it means: how much you have to bet, how many spins that is, and what it costs you on average before you can withdraw.
Averages over many plays. A single session can end far above or below them. Check the max bet rule in the terms: a bet above it can void the bonus.
How wagering works
The wagering requirement says how many times the bonus (or the deposit and bonus together) has to be bet before winnings can be withdrawn. A €100 bonus at 35x means €3,500 in bets. If the wagering applies to deposit plus bonus, the same offer asks for €7,000.
Game contribution is the share of each bet that counts. If blackjack counts 10 %, every €10 hand clears only €1. That is why bonuses are almost always cleared on slots.
The expected cost comes from the game's RTP. A 96 % RTP means the game keeps, on average, 4 % of every bet over the long run. Wagering €3,500 therefore costs about €140 on average. When that is more than the bonus, the bonus costs more than it gives.
What makes a bonus good?
Low wagering, wagering on the bonus only, no cashout cap and a non-sticky structure, where your own money is played first. No-wagering offers are best of all, because their cost is zero. They are on no wagering casinos, and bonus structures are explained in how to read a casino bonus.
18+. A bonus never changes the house edge. Set a budget before you play and stop when it is spent.