Casino Bonus EV Calculator
Calculate the true expected value of any casino bonus. Find out if the wagering requirements make it worth your time before you deposit.
Bonus Clearance Schedule
See exactly how long it will take to clear this bonus, what it will cost you in expected losses, and whether your bankroll can survive the variance.
Multi-Bonus Comparison
Add up to 4 bonus offers side by side to find the best EV. Edit each column directly.
| Metric | Bonus A BEST EV | Bonus B |
|---|---|---|
| Bonus Amount | $ | $ |
| Wagering | x | x |
| RTP (%) | % | % |
| Bet Size | $ | $ |
| Spins/hr | ||
| Net EV | -$40.00 | -$120.00 |
| Hourly EV Rate | -$6.86/hr | -$9.00/hr |
| Bust Risk | 81.3% | 82.8% |
| Days to Clear | 1.5 days at 4h/day | 3.3 days at 4h/day |
| Expected Loss | -$140.00 | -$320.00 |
Understanding Casino Bonuses
How Casino Bonuses Work
Casino bonuses typically match your deposit by a percentage (e.g., 100% match up to $500). If you deposit $100 and get a 100% match, you receive $100 in bonus funds. However, these funds are not immediately withdrawable, you must meet wagering requirements first.
Wagering requirements specify how many times you must bet the bonus amount (or bonus + deposit) before you can withdraw. A 35x wagering requirement on a $100 bonus means you must place $3,500 in total bets. Only after completing this playthrough can you cash out any remaining balance.
What Makes a Bonus +EV?
A bonus is +EV (positive expected value) when the bonus amount exceeds the expected losses from meeting the wagering requirements. The key formula is:
Bonus_EV = Bonus − (Total_Wagering × House_Edge)
House_Edge = 1 − (RTP / 100)
Total_Wagering = Wager_Base × Multiplier / (Contribution%)The sweet spot is low wagering multiplier + high RTP game. A 20x wagering bonus played on 99.5% RTP blackjack is almost certainly +EV. A 50x wagering bonus played on 96% slots is almost certainly -EV. The calculator above does this math instantly for any combination.
Game Contribution Explained
Casinos assign different contribution percentages to each game type. Slots typically count 100%, every $1 wagered on slots counts as $1 toward your requirement. But blackjack or roulette might only count 10-20%, meaning a $1 bet only counts as $0.10-$0.20.
This dramatically affects the effective wagering requirement. If you have a 35x bonus with 10% table game contribution, the effective multiplier is 350x. This is why casinos reduce contributions on high-RTP games. They know players can beat the bonus on blackjack, so they make it impractical by requiring 10x more volume.
Red Flags to Watch For
Excessive wagering (50x+): At 50x or higher, even 96% RTP slots make the bonus -EV. You will statistically lose more clearing the wagering than the bonus is worth.
Low max bet limits ($2-5): This extends the time to clear dramatically. A $5 max bet on a 35x/$100 bonus means 700+ spins minimum, taking hours.
Short time limits (3-7 days): Some bonuses expire if not cleared within days, creating pressure to play faster or forfeit. Combined with low max bets, this can be nearly impossible.
Wagering on bonus + deposit: A 35x requirement on bonus + deposit is much worse than 35x on bonus only. On a $100 deposit + $100 bonus, that is $7,000 vs $3,500 in wagering.
Disclaimer: Results are mathematical estimates based on theoretical RTP values and assume infinite play. Actual results will vary due to variance (standard deviation). Short-term outcomes can differ significantly from the expected value. This tool is for educational purposes only and does not constitute financial or gambling advice. Always read the full terms and conditions of any bonus offer.
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Understanding Bonus Expected Value
What Is Bonus Expected Value?
Expected Value (EV) is the mathematical average outcome of a decision made repeatedly over many trials. Bonus EV specifically measures the average profit or loss you can expect from accepting a casino bonus after accounting for wagering requirements, game selection, house edge, and bust risk. A positive bonus EV means that if you claimed this bonus hundreds of times under identical conditions, you would profit on average, even though any single attempt might result in a loss.
Understanding bonus EV is critical because casinos structure their offers to appear attractive while remaining profitable for the house. A $500 free bet with 40x wagering requirements and slots-only restrictions has very different EV from a $500 cashback with 5x wagering on all games. The headline number is almost never the relevant figure, the EV calculation is.
Bonus hunters (also called "bonus abusers" by casinos) systematically seek bonuses with positive EV and decline negative EV offers. Over hundreds of bonuses, a positive EV player extracts consistent profit from promotional offers. Casinos attempt to prevent this through wagering requirements, game restrictions, maximum bet rules, and account velocity limits.
How to Evaluate Bonus Offers
Every bonus offer can be reduced to a single EV number using four inputs: bonus amount, wagering requirement multiplier, game contribution percentage, and house edge of the qualifying game. The calculation flows as follows:
= Bonus Amount × Wagering Multiple / Game Contribution
Step 2: Expected Loss
= Total Wagers Required × House Edge
Step 3: Bonus EV
= Bonus Amount − Expected Loss
Example: $200 bonus, 30x, 100% slots, 4% house edge
Total Wagers = $200 × 30 / 1.0 = $6,000
Expected Loss = $6,000 × 0.04 = $240
Bonus EV = $200 − $240 = −$40 (negative, decline)
Beyond the pure EV calculation, also consider: maximum bet restrictions during wagering (typically $5 to $10, violating this forfeits the bonus), game exclusions that force you onto high-edge games, time limits that create pressure to play suboptimally, and maximum cashout limits that cap your upside even if you run well.
Wagering Requirement Impact on EV
The wagering multiple is the single most impactful variable in bonus EV. Doubling the wagering requirement roughly doubles your expected loss, halving the EV. The relationship is linear: a 20x requirement is exactly twice as valuable as a 40x requirement on the same bonus, assuming all other factors are equal.
At 4% house edge: Break-even multiple = 1/0.04 = 25x
At 2% house edge: Break-even multiple = 1/0.02 = 50x
At 1% house edge: Break-even multiple = 1/0.01 = 100x
A 30x requirement is positive EV only if the house edge
on your wagering game is below 1/30 = 3.33%
This formula gives you an instant sanity check: divide 1 by the wagering multiple to find the maximum house edge for positive EV. If the casino offers only games above that house edge, the bonus is negative EV regardless of its headline value.
Optimal Game Selection for Bonus Clearing
Assuming you must clear a wagering requirement, game selection can dramatically change your expected outcome. The two key variables are house edge (lower is better) and contribution rate (higher is better). The optimal clearing game is the one with the lowest house edge per unit of wagering credit generated.
Effective house edge per clearing unit = House Edge / Contribution Rate. A game with 1.5% house edge at 20% contribution has an effective cost of 1.5%/0.20 = 7.5% per dollar of requirement cleared. A game with 4% house edge at 100% contribution costs only 4% per dollar cleared, the second game is far better for clearing despite its higher nominal house edge.
The best games for bonus clearing when permitted: single-deck blackjack with basic strategy (0.3 to 0.5% edge), video poker with optimal play (0.5 to 0.8% on full-pay games), and European roulette (2.7% edge). Among slots, prioritize games with published RTPs above 96%. Avoid progressive jackpot slots, American roulette, and table game side bets.
Deposit Match vs. Free Bet EV
Deposit match bonuses and free bet bonuses have fundamentally different EV structures. A deposit match bonus adds funds to your balance that can be fully withdrawn after clearing requirements. A free bet gives you a stake to use, but on a win you typically receive only the profit, not the original stake back.
(The stake is not returned regardless of outcome)
Example: $100 free bet at 2.00 odds, true probability 50%:
EV = $100 × 0.50 × 1.00 = $50 (only 50% of face value)
Matched betting hedge approach:
Lay the same selection on an exchange → lock in ~80-85%
of free bet face value as guaranteed profit
Free bets are significantly less valuable than equivalent cash bonuses, typically 70 to 85% of face value for sharp bettors who hedge them correctly. Always evaluate free bet offers in terms of their hedged cash equivalent, not their face value. A "$200 free bet" is closer to a $160 to $170 cash bonus when properly hedged.
Frequently Asked Questions
Q: When should I decline a bonus even if it has positive EV?
A: Positive EV does not mean zero risk. Decline a bonus when: the variance is too high relative to your bankroll (bust risk is significant), you are on a flagged account where claiming could trigger restrictions, the terms are ambiguous about max cashout, or the time limit creates pressure to make suboptimal bets. A small positive EV bonus with high bust risk on a limited bankroll may not be worth the downside.
Q: How do casinos prevent bonus abuse?
A: Modern casinos use multiple detection layers: max bet restrictions during wagering (violating these is grounds for forfeiture), game contribution weights that push players toward high-edge games, velocity limits (minimum time between bets), IP and device fingerprinting to link accounts, and behavioral analysis flagging accounts that win above statistical expectation on bonuses. Professional bonus hunters use careful account management to extend longevity.
Q: Is matched betting legal?
A: Yes, matched betting (using free bets and bonuses combined with laying bets on exchanges to lock in risk-free returns) is legal in jurisdictions where sports betting and exchanges are legal. It is simply a systematic approach to extracting guaranteed value from promotional offers. Bookmakers dislike it and may restrict accounts, but it is not illegal.
Q: What is bust risk and how do I manage it?
A: Bust risk is the probability of losing your entire bonus balance before completing the wagering requirement. It increases with higher-volatility games and larger wagering multiples. Manage it by choosing lower-variance games (low-volatility slots or permitted table games), keeping bets at or near the minimum allowed, and accepting losses without chasing. If you bust, move to the next opportunity rather than risking your own funds.