Online slot RTP: how return percentages work and how to verify them
The RTP published for a game version. A casino’s selected version may differ from the provider’s reference.
RTP is a theoretical long-run percentage, not a personal return guarantee. One title can exist with multiple mathematical configurations, making version and paytable evidence important.
Observed payout data is treated as a dated sample and never as a prediction that a game is due to win.
How our slot score is calculated: a worked example
This example uses hypothetical game inputs: 96% RTP, a 5,000× maximum win, a 1:4 hit rate and HIGH volatility. It does not describe or certify a particular game.
Scroll the table horizontally to see all columns
| Input | Normalization to 0–100 | Weight |
|---|---|---|
| RTP: 96% | (96 − 94) ÷ 4 × 100 = 50 | 40% |
| Maximum win: 5,000× | 5,000 ÷ 10,000 × 100 = 50 | 25% |
| Hit rate: 1:4 | (5 − 4) ÷ 3 × 100 = 33.333… | 20% |
| Volatility: HIGH | HIGH → 85 | 15% |
50 × 40% + 50 × 25% + 33.333… × 20% + 85 × 15% = 51.9/100
Numeric components are clamped to 0–100 before weighting. Volatility uses editorial values: LOW 65, MEDIUM 75, HIGH 85 and VERY HIGH 95. Giving HIGH a value of 85 is a model preference, not stronger winning odds or greater safety. Only the final weighted sum is rounded to one decimal place; incomplete inputs receive no calculated score.
Before using an RTP filter: check the game version
- Open the game's rules, information or paytable at the casino; the label and location vary between games.
- Look for theoretical RTP or return-to-player information and check whether multiple versions or configurations are listed.
- Then compare the same version using the RTP filter. If the version cannot be identified, do not treat a provider's general reference as a confirmed casino setting.
- Theoretical RTP40%
- Maximum Win Limit25%
- Hit Frequency20%
- Game Volatility15%
Weights in our comparison formula; these are not winning probabilities.
Compare the listed information
Scroll the table horizontally to see all columns
| GAMES | Game providers | Casinos | Theoretical RTP |
|---|---|---|---|
| Gates of Olympus | Pragmatic Play | BC.Game | 96.50% |
| Sweet Bonanza | Pragmatic Play | BC.Game | 96.48% |
| Book of Dead | Play'n GO | BC.Game | 96.21% |
| Elvis Frog in Vegas | BGaming | BitStarz | 96.00% |
| Big Bass Bonanza | Pragmatic Play | BitStarz | 96.71% |
| Starburst | NetEnt | BitStarz | 96.08% Published RTP source |
| Gates of Olympus | Pragmatic Play | 22Bet | 96.50% |
| Sweet Bonanza | Pragmatic Play | 22Bet | 96.48% |
These figures come from the same casino information shown above. Open a review or the linked source for the full context.
Practical checklist
- Tie exact RTP to a specific game version or paytable.
Jurisdiction matters
Frequently asked questions
Where can I find the RTP for the version I am playing?
Open the game rules or paytable at the casino. Compare a provider’s published value only when it refers to the same version.
Is RTP the same as our slot score?
No. RTP is a published theoretical return percentage. Our slot score combines RTP, maximum win, hit rate and volatility to compare game characteristics.