Casino promos aren’t “rewards.” They’re contracts. And like any contract, the value lives in the fine print: wagering, contribution rates, max cashout caps, excluded games, max bet rules, time limits, and the classic “we reserve the right…” clause.
This page gives you a simple EV worksheet you can copy/paste and reuse. It won’t promise profit. It won’t teach you how to bypass rules. It will help you do the one thing most players skip: estimate the expected value (EV) before you opt in.
Verify first, bet second. And remember: fairness ≠ profit. Even “high RTP” is an as-advertised long-run model, not a break-even guarantee.
Internal essentials you’ll likely use alongside this tool: EV Explained, Excluded Games & Contribution, and Max Cashout Traps.
Bonus EV is a best-effort estimate of how much value a promo adds (or subtracts) on average, after you account for the required wagering and the expected house edge during that wagering. It’s not a prediction of your next session. It’s a long-run expectation.
The core insight is simple: a bonus can look generous and still be negative EV if the required wagering forces you to expose too much bankroll to the house edge. The casino doesn’t need to “rig” anything; math does the job just fine.
If you want the foundation, read: Expected Value (EV) Explained.
At a high level, most promo EV can be approximated as:
Promo EV ≈ Expected Bonus Value
− Expected House Loss from Required Wagering
− Fees / Friction (withdrawal limits, caps, time pressure, etc.)The hardest part is not the arithmetic. It’s correctly identifying what you’re required to wager, which games count, and what limits can reduce the value (like max cashout caps).
Two pages that save you from common traps: Wagering Requirements and Max Cashout Traps.
This workflow is intentionally conservative. If the promo still looks decent after conservative assumptions, it’s probably not terrible. If it looks terrible here, it’s rarely rescued by optimism.
Write down the exact terms: bonus amount, wagering multiple, what counts toward wagering, max bet, max cashout, time limit, and any excluded games. Promos are contracts, not gifts.
Determine what the wagering multiple applies to (bonus only vs deposit+bonus) and apply contribution rates if games count partially.
Use the RTP/house edge of the games you will play during wagering. If you don’t know, use a conservative assumption. Remember: “RTP 98%” is not a promise you break even short-term.
Multiply required wagering by house edge (adjusted for contribution). That’s your expected cost to “unlock” the bonus.
If there’s a max cashout cap, the bonus value is effectively limited. Add practical friction: fees, tight time limits that force higher bet frequency, and withdrawal constraints.
If you’re not sure what “excluded games” and “contribution” really do to your EV, this is the page: Excluded Games & Contribution.
Copy this into Notes / Notion / Google Docs. Fill it once, then reuse it every time a promo tries to charm you.
PROVABLYSMART — BONUS EV TEMPLATE (v1)
PROMO SNAPSHOT (the contract)
- Promo type: Deposit match / Free spins / Cashback / Reload / Other
- Bonus amount (B): ________
- Deposit required (D): ________
- Wagering multiple (w): ________ x
- Wagering base: Bonus only / Deposit+Bonus / Other: ________
- Time limit: ________
- Max bet while wagering: ________
- Game contribution rules (examples): slots 100%, live 10%, table 0%: ________
- Excluded games/providers: ________
- Max cashout cap (Ccap): ________ (if any)
- Withdrawal / fee notes: ________
- KYC required before withdrawal? YES / NO
CALCULATIONS
1) Required wagering (Wreq):
- If base = Bonus only: Wreq = B × w
- If base = Deposit+Bonus: Wreq = (D + B) × w
Your Wreq: ________
2) Contribution adjustment (if needed):
- Effective Wreq = Wreq / contribution_rate
Example: 50% contribution ⇒ divide by 0.5 (doubles the required volume)
Your effective Wreq: ________
3) House edge estimate for wagering games (h):
- h = 1 − RTP
Your h: ________
4) Expected loss from wagering (EL):
EL = effective Wreq × h
Your EL: ________
5) Expected bonus value (BV):
- Start with BV = B (or the realistic value of spins)
- Apply caps if present (max cashout can limit upside):
Your BV (after cap considerations): ________
6) Promo EV estimate:
EV ≈ BV − EL − friction
Your EV: ________
DECISION NOTE
- If EV is clearly negative under conservative assumptions: skip.
- If EV is modestly positive: still manage exposure (timebox + unit size).
- Promos increase volume. Volume increases variance exposure.To turn “manage exposure” into rules, use: Session Rules Template and Bankroll Unit Calculator.
Examples are where the brain stops hallucinating. Let’s do two: a deposit match and a cashback promo. These are simplified models, but they’re good enough to catch bad deals.
Assume: Deposit D = $200, Bonus B = $200, wagering w = 35x on bonus only. Slots count 100%. You plan to wager on games with RTP 96% (house edge h = 4%).
Required wagering: Wreq = B × w = 200 × 35 = $7,000
Expected loss from wagering: EL = 7,000 × 0.04 = $280
Estimated promo EV: EV ≈ 200 − 280 = −$80
Even before you add caps, max-bet rules, time pressure, and withdrawal friction, this one is mathematically ugly. It can still “win” in short-run outcomes, but the contract is working against you.
Assume: You expect to wager $2,000 across the week on ~98% RTP games (house edge 2%), so expected loss ≈ 2,000 × 0.02 = $40.
Cashback value: 10% × 40 = $4 (expected)
Cashback typically won’t make negative EV positive unless it’s unusually high or paired with low-edge conditions. But it can reduce drawdowns and smooth variance (which is still useful).
If cashback offers are your thing, this guide helps you model them: Cashback EV.
Want a brutal trap that ruins “good looking” wins? Read: Max Cashout Traps.
Use this when you don’t want to do full math but still want to avoid obvious landmines. The idea is not perfection — it’s avoiding bad contracts.
If you want a deeper explanation of the “why” behind these flags, start with: Wagering Requirements Explained.
Positive EV doesn’t mean “safe.” It can still be high variance, especially if the promo forces volume. If you decide to opt in, protect yourself with unit sizing and session rules. Exposure control is the difference between “planned promo play” and “I’m still wagering at 3 a.m.”
Two practical links you’ll actually use:
Bankroll Unit Calculator (choose a survivable base bet) and Session Rules Template (stop-loss + timebox).
No. EV is a long-run average, not a promise for your next session. A positive EV promo can still lose money in the short run due to variance. Treat EV as a planning tool, not a prediction.
Use the RTP of the games you will actually play to clear wagering. If you don’t know it, use a conservative estimate. Also remember: RTP is typically “as advertised” and meaningful in the long run, not as a break-even guarantee.
They change the effective wagering volume. If a game contributes 50%, you may need roughly double the wagering to clear requirements, which doubles expected loss. Use: Excluded Games & Contribution.
They limit upside and can turn a seemingly good promo into a value trap. The cap effectively truncates your best outcomes while you still pay the full variance and wagering cost. See: Max Cashout Traps.
Sometimes promos can improve EV, but it depends on the full contract and your actual wagering conditions. Even then, variance and practical friction can dominate the experience. This site focuses on making informed decisions, not promising profit.
Provably fair verification can help you trust the randomness, but it doesn’t change the promo contract terms or the underlying house edge. Use verification for fairness and EV math for value. Verification guide: How to Verify.
This tool is for clearer decisions and harm reduction, not encouragement. If gambling stops being fun, if you’re chasing losses, or you’re betting money you can’t afford to lose, pause and get support. Resources live here: Responsible Gambling.