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Casino Bonus Wagering Calculator

Enter a bonus's terms to see how much you must bet before you can withdraw, and how much an average player loses doing it.

By ·

Bonus you receive100
Total you must bet7,000
Number of bets7,000
Average loss while wagering280

On average this bonus costs you money: an average player ends with about 0 of the 100 deposited.

The formula

  1. Bonus = the lower of deposit × match % and the maximum bonus.
  2. Wagering base = the bonus, or deposit + bonus, as the terms say.
  3. Total to bet = base × wagering requirement ÷ game contribution.
  4. Average loss = total to bet × (100% − RTP).
  5. Expected balance at the end = deposit + bonus − average loss.

Where to find the numbers

  • Match %, maximum bonus, wagering and maximum bet: the casino’s bonus terms.
  • Contribution: usually 100% for slots and 0–10% for table and live games.
  • RTP: in the game’s information screen. It can differ between casinos for the same slot.

These are long-run averages. Real sessions vary: many players lose the whole balance before finishing the wagering, and a few win more. A bonus is never free money.

Célia L. Martin

Célia L. Martin is an independent iGaming consultant and regulated-markets analyst with a background in applied mathematics and data science. Since 2021 she has analysed gambling regulation in Europe and Latin America, and since 2024 she has worked as an independent consultant. At Casino General she checks licences, bonus terms and payment rules.

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Gambling is entertainment, not a way to make money. Set a deposit limit before you play. If you have self-excluded in your country, an offshore casino will not honour it, so please do not use one to get around it.

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