What is RTP
Return to Player (RTP) is one of the core mathematical properties of any casino game. It is the percentage of total wagered money the game returns to customers over a theoretically infinite number of rounds. The remainder is the operator’s long-run margin, also known as the house edge.
RTP is set by the game developer when the game is built, audited by an external testing laboratory such as eCOGRA or Gaming Laboratories International (GLI), and disclosed in the game’s information panel. For a given game build, RTP is fixed and cannot be altered by the operator running it.
How RTP is calculated
The formula is straightforward: RTP equals total returned to customers divided by total wagered, multiplied by 100. Calculated across millions of rounds to smooth out short-term variance.
RTP is determined by the game’s mathematical model. Every possible symbol combination, payline, and bonus path is enumerated, weighted by its probability, and aggregated. The resulting figure is then verified by an accredited testing laboratory before the game can be released for real-money play.
Once certified, the RTP is locked to that specific game build. If a developer publishes a second RTP version of the same title, each version is certified separately and the operator chooses which to license. The RTP version offered should be disclosed in the game information panel.
RTP vs House Edge
RTP and house edge are two sides of the same coin. They always sum to 100%. A 96% RTP means a 4% house edge. A 99% RTP means a 1% house edge.
If you read RTP in operator coverage, slot reviews, or in our Responsible Gambling Index framework, it is always paired with house edge as the inverse measure of the same outcome.
What is a good RTP
Different game types and jurisdictions produce different RTP ranges. The four bands below cover the iGaming standard for online slots:
- Below 94%: Avoid unless it is your preferred game. High house edge.
- 94% to 96%: Industry standard. Most mainstream slots fall here.
- 96% and above: Strong. Smaller house edge, better long-run value per wager.
- 98% and above: Exceptional. Typically table games with optimal strategy.
Why RTP matters in industry reviews
RTP is one of the metrics published in every casino and game-provider review on Gamblers Connect. It feeds into the Responsible Gambling Index scoring framework, particularly around transparent paytables, RNG certification, and disclosure of game-build versions.
For operators, listing the actual RTP version of every game in the lobby is a baseline transparency expectation. For game providers, publishing certificate evidence from accredited testing labs is the standard. Listings are paid; outcomes are not for sale.
Frequently asked questions about What Is RTP (Return to Player)?
A higher RTP means a smaller house edge and less money lost per bet over the long run. It does not guarantee any specific short-term outcome. High-volatility games with strong RTP can still produce long dry spells before a meaningful win.
Not for a single certified game build. The RTP is fixed by the game developer and certified by an external testing lab. Some providers do publish multiple RTP versions of the same slot, and the casino licenses one of them. Reputable casinos disclose the RTP version they offer.
No. RTP is a fixed mathematical property of the game build. Individual sessions deviate from the published RTP, which is normal and expected. Each round is its own event, statistically unrelated to previous rounds.
In the game’s information panel, in the paytable, or on the developer’s official website. Reputable casinos display RTP in their game library. Gamblers Connect publishes RTP in every game-provider and casino review where the figure is certified and disclosed.
RTP tells you how much returns to customers on average over a long sample. Volatility tells you how the wins are distributed. Two slots can share the same 96% RTP, but a low-volatility build pays often and small, while a high-volatility build pays rarely and large. They are two separate properties of the game.