RTP Return to Player
A theoretical value showing what percentage of total bets a slot is designed to pay back as winnings over the long run. In Korean it is called 환수율.
| English | Return to Player |
|---|---|
| Classification | Math & Probability |
| Korean | 환수율 |
| Formula | Total payouts ÷ total bets × 100 |
| Online slot average | About 94-97% |
| Opposite concept | House edge (100% - RTP) |
| Verification | Simulations by testing labs such as GLI and eCOGRA |
| Malta minimum | 85% (since 2021) |
| Nevada minimum | 75% |
| Disclosure requirement | UKGC RTS 3 in the UK, among others |
Overview
RTP (Return to Player) is a theoretical value showing what percentage of the bets a slot takes in over a very long period it is designed to pay back as winnings. The testing lab eCOGRA defines RTP as “the expected rate of return on money wagered on a game over a long period of time.” In Korean it is called 환수율.
For example, an RTP of 96.50% means the game is built to return 965 of every 1,000 wagered as winnings when averaged over a huge number of spins.
Calculation and verification
Formula
RTP = total payouts ÷ total bets × 100. The RTP referred to here is a theoretical value from the game’s design, and it differs from a figure calculated from actual play records.
Verified by testing labs
Providers can’t just write down any RTP they like. Independent testing labs such as GLI receive the game’s source code, math design document, and rules, then run billions of game rounds in their own simulations to confirm the result matches the designed RTP. eCOGRA also uses large-scale sample simulations to check that each winning combination appears as often as it should. A game must pass this certification before it can launch in regulated markets.
How to read RTP
It’s different from a single session
RTP is an average based on an enormous number of spins, so no individual session experiences RTP exactly. Results from 100 or 1,000 spins can differ greatly from RTP. Volatility describes how large that gap can be.
House Edge
The house edge is 100% minus the RTP. With an RTP of 96.50%, the house edge is 3.50%, which is the share the game operator keeps over the long run.
It’s different from hit frequency
Hit frequency is “how often you win” (regardless of amount), while RTP is “the share of total wagers paid back.” Frequent wins don’t mean a high RTP. For example, Gates of Olympus is known to have an RTP of 96.5% and a hit frequency of about 28.82%.
Why the same game can have different RTPs
Multiple RTP versions
Most providers get a game certified in several RTP versions and let the operator choose. That’s why the same game can have a different RTP depending on where you play it.
| Provider / Game | RTP Versions |
|---|---|
| Play’n GO (all games) | 96%, 94%, 91%, 87%, 84% (some 98%) |
| Pragmatic Play Gates of Olympus | 96.50%, 95.51%, 94.50% |
| Nolimit City’s San Quentin xWays | 96.03%, 94.11% |
| NetEnt’s Starburst | 96.09% to 90.05% (6 versions) |
According to Play’n GO, most regulators require a 94% or 96% version. You can check the exact RTP in the in-game info (i) or help screen.
Share of base game and bonus
RTP is split between the base game and free spins. San Quentin xWays’ 96.03% is made up of 58.74% from the base game and 37.29% from free spins. The higher a game’s volatility, the larger the bonus share.
Bonus buy and ante bet
RTP can vary slightly by mode. Pragmatic Play’s Book of Fallen game rules list 96.50% for the base game, 96.48% for buying free spins, and 96.49% for the Super Spin ante bet. Gates of Olympus, on the other hand, keeps its RTP the same with the ante bet, which raises your bet by 25%.
RTP rules by country
| Jurisdiction | Regulations |
|---|---|
| UK UKGC | Under RTS 3, the RTP or win probability must be shown in the game description. There is no minimum RTP |
| Malta MGA | Minimum RTP of 85% (lowered from 92% in 2021, applies to both online and land-based) |
| Nevada, USA | Pays back at least 75% on all bets (Regulation 14.040) |
| Pennsylvania, USA | Minimum payout rate of 85% |
Online vs. land-based
Online slots usually have an RTP of around 94-96%. Land-based casinos report a “hold rate” (the share the casino keeps) instead of RTP, and the 2025 statewide slot hold rate in Nevada was 7.13%. By that math, about 93% of wagers were returned, which is slightly lower than online.
