Slot machine RTP shows a game's average payout over millions of spins, not short sessions. Learn how RTP works and how you can use it to make the most out of your favorite slots.
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Slot machine RTP (also known as Return to Player) is a percentage that shows how much wagered money a casino game returns to players on average over a long period. This amount is usually calculated over millions of spins.
Example: If you have a slot with an RTP of 96%, which is the average for online slots, it means that for every $100 bet, the game will return $96 on average over time.
While knowing what RTP is in slots is useful, it does not point to guaranteed returns. That’s because the RTP is a mathematical average taken from millions of spins, and regular, shorter sessions can return less (a loss) or more (a profit) against the given RTP.
Slot machine RTP vs volatility explains why two slots with the same RTP can feel completely different to play and have different odds. A slot’s RTP focuses on the return potential of the game, but it offers nothing about how often the game pays out and how large the wins can be.
Some slots with a 96% RTP can feel brutal, while others can seem easy. That’s because the Return to Player is only a long-term forecast and does not really impact short-term sessions. Volatility is the metric that decides how the value of a game works.
Volatility shows the general risk of a slot. When you play low volatility games, you’ll get frequent smaller wins that help you to play for longer and control your budget. The alternative is high volatility slots that pay out less frequently but offer bigger wins when they do hit.
Practical tips:
Pick a slot with low volatility if you want more control over spending and longer sessions, and high volatility slots if you are hunting bigger wins and can handle losing streaks.
The expected value (EV) of a slot bet shows the average amount you’re expected to lose per spin and is calculated as EV = Bet × (1 − RTP). For instance, wagering $2 on a slot with a 95.5% RTP results in an expected loss of $0.09 per spin. Across 150 spins, that works out to roughly $13.50 in expected losses, reflecting a 4.5% house edge.
Slot machine RTP is calculated by dividing the total value of all possible payouts by the total amount wagered over a massive number of spins. Software developers model every possible outcome, how often it occurs, and the expected payout, then compare this to the total number of bets placed to produce the Return to Player percentage.
Software providers who build the games decide the slot machine RTP. The RTP of an online slot machine is always set by the game provider, not the casino. Studios such as NetEnt, Games Global, and Pragmatic Play create games with either a single fixed RTP or several approved RTP options that casinos can choose from.
While casino sites can choose from these approved RTP settings, they cannot set the RTP themselves. The RTP settings must be tested and approved by independent labs and regulators to ensure fairness.
While the RTP tells you how much you can expect from a casino game over time, the house edge is the reverse of the RTP. It represents the casino’s mathematical advantage over players and displays how much the casino can stand to gain. To calculate the house edge, you simply take the slot machine RTP and subtract it from 100%.
The formula looks like this: House Edge = 100% - RTP
Looking at a slot with a 96% RTP, the house edge is 4%. This means, on average, the casino is making $4 in profit from every $100 bet on the game. Slots have a decent house edge, but other types of casino games often have better potential player returns.
Yes, the same slot game can have different Return to Player rates, but only one can be active at a single time. If you play the same game at different online casinos, you may see that it has a different RTP even though the gameplay and features are the same.
Software providers can build different RTP settings into a single game. Pragmatic Play is one studio that does this often, such as on its Gates of Olympus slot. It has a default RTP of 96.5% but then variable settings of 95.51% and 94.5%.
The default RTP is the setting the provider recommends for the optimal gameplay of the slot. But casinos can choose the RTP variables if they want. If you are playing a slot that has different RTP settings, it is best to seek the default version of the game.
Tip: Knowing how to read slot machine paytables helps because you can easily find the RTP before you spin.
Knowing how to find the RTP on a slot machine depends on what type of game you’re playing and whether you’re spinning the reels online or in a land-based casino.
When you’re online and looking for a slot’s RTP, you can find it in different places on the site:
Some online casinos show RTP directly in the game lobby through a preview of the slot you want to play, such as an info panel or game splash screen.
The paytable is the easiest way to find RTP. When you start a slot game, click the info or menu button to see details, including RTP and volatility.
You can ask customer support through live chat if they can confirm the RTP of a specific slot.
Getting RTP information in a land-based casino is different and a little less consistent:
Some physical slot machines have a “Help” page on the cabinet that shows the payout percentage.
Try asking staff, but regulations change from state to state, so attendants will not always know the exact RTP of a game.
A “good” RTP for slots varies according to the type of player and whether the game is online or in a physical casino. If you compare slots by RTP ranges, you can see how your potential return increases.
Below 94% (low RTP) slots have less value over the long term. You see them more commonly in land-based casinos as old cabinet slots.
94%–96% (average RTP) slots fall into the average range and provide consistent returns. Notable games include Book of Dead and Gonzo’s Quest.
96%–98% (strong RTP) is heading into the high RTP range, and in theory, these games provide more value. Examples include Starburst, Sugar Rush 1000, and Blood Suckers.
98%+ (rare RTP) slots are officially high RTP games, but they are rare and not widely available. One well-known high RTP slot is Ugga Bugga.
If you’re playing in the US, online slots usually have higher RTPs than slot machines in land-based casinos. That’s because regulations and cost overheads impact the RTPs lower.
💡 Remember that RTP can vary on some slots, such as Sugar Rush 1000 and Cleopatra II. Always check the official paytable or rules to see which RTP settings you’re playing on. We source the RTP values we provide from official documentation from the game developer, in-game paytables, and information from regulators. When there are multiple RTP settings, we select the most commonly released default RTP.
There are common myths around RTP that can confuse players and lead to misunderstandings about how slot machine RTP works. We’re here to clarify what’s true and what’s not:
Myth #1: Slots are “due” to pay out at certain times. No one, including the casinos and software developers, knows when a slot is going to pay out. Each spin is independent and random, and while RTP affects long-term payout percentages, it has no bearing on individual spins.
Myth #2: Casinos let you win big to get you hooked, then lower the RTP. Casinos don’t have the ability to change RTP or grant you big wins. Again, all spins are random and independent, and not even the casinos can change that.
Myth #3: You’ll win more often on high RTP games. This confuses RTP with volatility, which measures how often slots pay out. Some slots have high RTP because they seldom pay out, but when they do, the rewards are considerable.
Fact #1: Many jurisdictions have minimum RTPs that games must meet. In Nevada, games must have at least a 75% RTP, but that number can be much higher elsewhere. For example, New Jersey has an 83% minimum RTP.
Fact #2: The same slot can have different RTPs. Many developers create games with different RTPs, and then let casinos decide which one to offer. Others have variable RTPs that can change depending on how you play.
Fact #3: The RTP accounts for every one of the slot’s features. To calculate RTP, you have to include every feature in the game, including bonus rounds, jackpots, and more. These are all averaged out to find the RTP, not calculated separately.
How Does RTP Affect My Chances of Winning?
Slot RTP affects long-term payout ranges and not short-term or individual sessions, which still rely on random outcomes from the RNG.
Is the RTP Data in Your Checker Updated Regularly?
We constantly review and re-check the slots and casinos we test to stay up to date with changes. While developers changing RTP on a slot is rare, we ensure our data is accurate and up to date.
Can RTP Vary for the Same Slot Across Different Casinos?
Some software providers put different RTP settings into their games, and the casino can then choose which version they offer to players.
Why Should I Trust Your RTP Checker Over Casino Claims?
Our RTP checker is based on accurate information for software providers and the official slot paytable, while our formula is designed to provide real information to our readers.
Do All Online Slots Disclose Their RTP?
Most reputable software developers make their game RTPs publicly available either on official pages or in the paytable of the game. They must allow their games to go through independent testing to ensure the RTP is fair.
How many spins does it take for RTP to be accurate?
It can take hundreds of thousands or even millions of spins for the percentage of the RTP to become an accurate measurement of how a slot returns wins.
Can I calculate a slot’s RTP myself?
In theory, it is possible to calculate the slot RTP yourself, but in practice, it is impossible because to get an accurate measurement, you’d need to play a game over millions of spins.
Do bonus features affect RTP?
Bonuses and slot features impact the RTP and can make it lower. This is clear in progressive jackpot slots, where the standard game has a higher RTP, and the jackpot mini game has a lower RTP.
What’s the highest RTP slot available?
Ugga Bugga is an online slot from Playtech that has a 99.07% RTP, making it an online slot with one of the highest Return to Player percentages.
Is RTP the same as payback percentage?
RTP is the payback percentage of a slot because it shows how much a slot game pays back on money spent through bets over a long period of time.
Do US online casinos show RTP?
There is no legal requirement for online casinos to show RTP to players in the US, but some individual operators can disclose game RTPs.
Do RTPs differ by state/operator?
While casinos and regulators cannot change the RTP of a slot themselves, they can host different RTP versions of some games. You may see the same game with a different RTP setting in two states.
Is RTP posted on physical slot machines in Las Vegas?
Land-based casinos in Las Vegas do not publish RTP data on slot machines by default, and attendants are not able to disclose payout rates to players.
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