RTP, or return to player, is the share of all the money bet on a slot that the game is designed to pay back over its full cycle of outcomes. A 96% RTP means that across a very large number of spins, $100 of bets returns $96 on average and the game keeps $4. That $4 is the house edge: 100% minus the RTP. The RTP and volatility simulator shows how far a real session strays from that average.
How regulators define RTP
RTP is a theoretical figure, worked out from the math of the game rather than from what happened last week. New Jersey’s rules define theoretical return to player as the portion of wagers expected to be returned to patrons after a complete game cycle (N.J.A.C. 13:69D-1.1). Pennsylvania’s definition is the total awards expected over one cycle of the game divided by the number of combinations in that cycle (58 Pa. Code § 461a.1).
Independent test labs check the figure before a game is approved. Gaming Laboratories International’s standard for online gaming systems defines RTP as total won divided by total wagered, and distinguishes the theoretical figure from the actual one measured in play (GLI-19).
The minimum RTP in US states
States set a floor, not a target. A game may pay back more than the minimum but not less.
| Jurisdiction | Minimum theoretical return | Rule |
|---|---|---|
| Nevada | 75% for each wager | Gaming Regulation 14.040 |
| New Jersey | 83% for slot machine games, applied to online slots too | N.J.A.C. 13:69E-1.28A, via 13:69O-1.5(n) |
| Pennsylvania | 85% for slot machines | 58 Pa. Code § 461a.7 |
| Michigan | 80% for house-banked online games | Mich. Admin. Code R 432.633b |
| GLI default | 75%, unless the regulator sets its own | GLI-19 |
These floors sit well below the RTPs studios publish for many online slots, such as the 88% to 96% range in the example below, so the floor rarely decides anything for a player. What matters is the RTP of the game in front of you. Michigan adds one detail worth knowing: the projected contribution of a progressive jackpot may not be counted toward the game meeting the minimum.
One game, several RTPs
A studio can build the same slot at several RTP settings and let each casino choose. Hacksaw Gaming, for example, lists four RTPs for its game Wanted Dead or a Wild: 96.38%, 94.55%, 92.33% and 88.42% (studio page). Same reels, same look, very different price:
| RTP version | House edge | Expected cost of 1,000 spins at $1 |
|---|---|---|
| 96.38% | 3.62% | $36.20 |
| 94.55% | 5.45% | $54.50 |
| 92.33% | 7.67% | $76.70 |
| 88.42% | 11.58% | $115.80 |
The lowest version costs more than three times as much per spin as the highest. You cannot tell which one a casino runs by looking at the reels, so check the number where you play.
Where to find a game’s RTP
Look in the game’s help, information or paytable screen. In the New Jersey rules, game play and payout rules must be readily available before a player begins and during play (N.J.A.C. 13:69O-1.5), but we found no US state rule that requires the RTP percentage itself to be displayed. So check the help screen first, and do not assume a game without a figure runs its best version.
If the game does not show it, the studio’s own page may list the possible versions, which tells you the range but not the setting your casino chose. When the number is not shown, enter a cautious figure in the calculators rather than the best version.
What RTP does not tell you
RTP is a price, not a forecast. Two games at 96% can feel nothing alike: one pays small amounts often, the other pays rarely and big. That difference is volatility, and it decides how a single session goes. For a second explainer that covers RTP and volatility together, with bankroll examples, see casinonline.us.com’s guide to slot RTP and volatility.
Common questions
What is a good RTP for a slot?
Higher is cheaper to play. Each point of RTP is a point off the house edge, so a 97% game costs three quarters as much per spin on average as a 96% one. Compare the RTP of the exact version your casino runs, because one title can be offered at several settings.
Is RTP the same as my chance of winning?
No. RTP is the average share of money returned over a very large number of spins. It says nothing about how often a spin wins, which is hit frequency, or how the return is spread between small and large wins, which is volatility.
Can a casino change a slot's RTP?
A game can be built with several RTP settings, and the operator offers the version it chooses, within the minimum its state sets. That is why the same title can show different RTPs at different casinos. Check the game's own information screen where you play.