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Last Updated
May 20, 2026

Wager Requirement Calculator: The Math Behind Your Bonus Payout

Wagering Math

Casinos love "Wagering Requirements" because 99% of players don't know how to calculate their actual mathematical risk. If you see a $100 bonus with 35x wagering, your total risk is NOT $3,500. It is significantly higher. Let's look at the math.

The "Base" Math vs. The "Real" Math

The base calculation is simple: Bonus Γ— Wagering Requirement = Total Bet Required. For $100 at 35x, that's $3,500 in total turnover. But the "Real Math" requires accounting for the House Edge. If you play a 96% RTP slot, the house edge is 4%.$3,500 Wagered Γ— 4% Edge = $140 Expected Loss.

🚨 The Bankruptcy Trap

In the example above, you got a **$100 bonus**, but your **expected loss is $140**. This means you are mathematically guaranteed to lose your entire deposit and the bonus before you finish the wagering requirements over a large sample size. This is a -EV (Negative Expected Value) bonus.

How to Find +EV (Profitable) Bonuses

To win, you must find bonuses where:
Bonus Amount > (Total Wager Γ— House Edge)

Don't Guess the Math. Verify It.

Our interactive EV Calculator does the heavy lifting for you. Just enter the bonus and RTP to see your pure profit margin.

Open EV Calculator β†’
Sofia Draganov
Reviewed By

Sofia Draganov

Chief RNG Auditor & Senior Data Analyst

Sofia is the Technical Lead at SpinBonus, specializing in RNG certification and mathematical verification. With over a decade in iGaming analytics, she has audited 500+ wagering systems to ensure player safety through quantitative proof and algorithmic transparency.

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