Wagering Requirement Calculator: Is That Casino Bonus Worth It?
A free wagering requirement calculator that shows the total wagering needed, expected loss, and true value of any casino bonus. Compare how the same bonus plays out across slots, blackjack, and roulette.
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How Wagering Requirements Work
Total Wagering = Base × Multiplier
Effective Wagering = Total ÷ (Contribution%)
Expected Loss = Effective Wagering × (1 − RTP%)
True Bonus Value = Bonus − Expected Loss
- Base — bonus only, or bonus + deposit (depends on terms)
- Multiplier — how many times you must wager (e.g. 35×)
- Contribution % — how much each game type counts toward the requirement
- RTP — Return to Player, the theoretical percentage returned over time
A bonus is mathematically profitable when the expected loss from wagering is less than the bonus amount itself. Lower multipliers and higher-RTP games improve the true value of any bonus.
This calculator uses standard mathematical models to illustrate how wagering requirements affect bonus value. Actual results vary — RTP is a long-run statistical average, and short-term variance can be significant. Game contribution percentages and wagering terms differ between operators; always read the specific terms.
The short answer
The calculator above takes any casino bonus — the amount, the wagering multiplier, the game RTP, and the contribution percentage — and shows you what it actually costs to clear. Most bonuses that look generous on the surface become net losses once you run the math. This calculator does that math for you.
Key takeaway: A $100 bonus with 35x wagering on slots (96% RTP) requires $3,500 in total bets. At 96% RTP, you'll lose about $140 in expected value just to clear the requirement — turning that "free $100" into a $40 net loss. The calculator shows this instantly for any combination of terms.
How to use the calculator
- Enter the deposit and bonus — either a dollar amount or a percentage of your deposit.
- Set the wagering multiplier — 35x is the most common; some casinos go as low as 10x or as high as 60x.
- Choose what the multiplier applies to — "Bonus only" (35x the bonus) or "Bonus + Deposit" (35x the total, which is much more expensive).
- Pick a game or set custom RTP — the calculator includes presets for common game types (slots, blackjack, roulette, video poker) with typical RTP and contribution rates.
- Read the results — total wagering required, expected loss, true bonus value, and whether it's worth taking.
The math behind wagering requirements
Every bonus comes with a wagering requirement: you must bet a certain multiple of the bonus before you can withdraw. The key insight is that every bet you place has an expected cost — the house edge.
Total wagering = bonus × multiplier
A $100 bonus at 35x = $3,500 in bets.
Expected loss = total wagering × (1 − RTP/100)
At 96% RTP: $3,500 × 0.04 = $140 expected loss.
True bonus value = bonus − expected loss
$100 − $140 = −$40. The bonus costs you money.
For the full explanation with worked examples, see our guide on wagering requirements explained. The wagering requirements math lesson walks through the same calculations step by step.
Why game contribution matters
Most casinos don't count all games equally toward wagering requirements. A typical structure:
Game | RTP | Contribution | Effective cost |
|---|---|---|---|
Slots | ~96% | 100% | $3,500 wagering → $140 loss |
Roulette | ~97.3% | 20% | $17,500 effective → $472 loss |
Blackjack | ~99.5% | 10% | $35,000 effective → $175 loss |
Video Poker | ~99.5% | 10% | $35,000 effective → $175 loss |
Higher-RTP games get lower contribution rates precisely because the casino would lose money if you could clear bonuses on blackjack at full contribution. The calculator's comparison table shows this tradeoff for every game type.
When is a bonus actually worth it?
A bonus has positive expected value when: bonus > expected loss to clear it.
The break-even point depends on the wagering multiplier and the best available RTP at full contribution. For slots at 96% RTP:
- 10x wagering: bonus costs 40% of itself to clear → profitable
- 20x wagering: costs 80% → barely profitable
- 25x wagering: costs 100% → break-even
- 35x+ wagering: costs more than the bonus → net loss
The calculator shows the exact break-even RTP for any wagering requirement, so you know the minimum game RTP needed to make the bonus worthwhile.
For more on evaluating bonuses, see our no-deposit bonuses guide and the Casino Bonuses Decoded course.
What should I learn next?
- Wagering Requirements Explained: The full math behind the fine print
- No-Deposit Bonuses: How "free" bonuses really work
- What Is RTP?: Return to Player vs the house edge
- Casino Bonuses Decoded Course: The full structured course
- Bankroll Management 101: Managing your money with or without bonuses
About the author
Trust & Responsible Play Writer
Marcus focuses on judging casinos before you deposit — licensing checks, red flags, scam patterns — and the bankroll habits and limit tools that keep play under control.