RTP and volatility are two different numbers that describe two different things. RTP (return to player) is how much of all the money staked on a slot it pays back over a very long run. Volatility is how that money is paid back: often and in small amounts, or rarely and in big ones. Neither tells you what will happen in your next session, and the same slot can be released in several RTP versions, so the number that counts is the one in the game's own info panel. Here is how to read both and size a session around them.
What RTP means
A slot with a 96% RTP is built so that, across many millions of spins, it pays back $96 of every $100 staked. The other 4% is the house edge. Two things follow from that:
- RTP is about total stakes, not your deposit. If you spin $1 a time for 500 spins, you have staked $500, even if you started with $50 and your winnings kept you going. At 96%, the average cost of those 500 spins is $20.
- RTP is an average over everyone and every spin. It is worked out from the game's maths, not from how one player's evening went.
The simplest way to use RTP is this formula: average cost = (100% − RTP) × total amount staked. A higher RTP means a lower average cost for the same amount of play.
Why RTP only shows up in the long run
A slot's payback is not spread evenly across spins. Part of the 96% comes from small, frequent wins; a large part can sit in rare events such as a bonus round that pays hundreds of times the stake, or the game's top prize. Most sessions never see those events, so most short sessions finish below the RTP, while a few lucky ones finish far above it.
That is why you can play a 97% slot and lose half your budget in twenty minutes, or play a 94% slot and walk away ahead. Neither result says anything about the RTP. Over a few hundred spins, luck dominates; only over an enormous number of spins does the result settle near the advertised figure.
It also means a slot is never "due". Each spin is independent, and a machine that has not paid for a while is no more likely to pay on the next spin.
What volatility (variance) means
Volatility describes the shape of the results. Two slots with the same RTP can feel completely different:
| Low volatility | High volatility | |
|---|---|---|
| How often it pays | Often | Less often |
| Typical win size | Small, often below the stake | Usually small, occasionally very large |
| Balance over a session | Drifts down slowly | Long dry runs, then sudden jumps |
| Bonus rounds | Come more often, pay less | Rarer, can pay hundreds of times the stake |
| Maximum win | Usually lower | Usually much higher |
Providers show volatility in different ways: a 1–5 scale, a row of lightning bolts or stars, or words like "medium-high". Some do not state it at all. A very high maximum win (for example several thousand times the stake) is usually a sign of high volatility.
Hit frequency: the third number
Hit frequency is the share of spins that return anything at all. It is not the same as winning: on a $1 spin, a payout of $0.40 counts as a "hit" even though you lost $0.60 on it. A slot can have a high hit frequency and still drain a balance steadily, because most of its hits are smaller than the stake.
Some info panels list hit frequency; many do not. When it is shown, use it alongside volatility: a low hit frequency together with high volatility means long stretches without a meaningful win.
Why the same slot can have different RTPs
Many providers release one title in several RTP configurations, for example a version at around 96% and others a few points lower. The game looks and plays the same; the paytable maths behind it differ. The casino or platform chooses which version to run, and that choice can differ from one site to the next.
So an RTP figure you read on a review site, in a provider's press release or in a video may not be the version you are playing. The reliable source is the game's own info panel, which states the RTP of the version loaded in front of you. We do not publish a list of RTPs for our lobby here for exactly this reason: the figure in the game is the one that counts.
How to check a slot's RTP on Skroll
- Open the slot from the slots lobby.
- Tap the menu or info (i) icon. On a phone it is usually in a corner of the game screen, sometimes behind a "≡" button.
- Open Game rules, Help or Paytable and scroll. Look for "return to player", "RTP" or "theoretical return".
- If the game has a feature buy, check whether it lists a separate RTP for it; it can differ from the base game.
- Note the volatility rating if the game shows one, and the maximum win.
It takes under a minute and it is the only figure you should rely on. If a game's panel does not show an RTP, ask support.
Sizing a phone session around volatility
Slots on a phone are quick. At one spin every four seconds you play about 900 spins an hour. At $0.50 a spin that is $450 staked per hour, and on a 96% slot the average cost is about $18 an hour. Quick-spin and autoplay settings push the number of spins, and so the hourly cost, higher.
A practical rule is to start from your budget, decide how many spins you want it to cover, and let that set the stake. High-volatility games need more spins in reserve, because the bonus round that carries most of their payback may take a long time to arrive.
| Session budget | Low volatility (aim ~100 spins) | High volatility (aim 200–250 spins) |
|---|---|---|
| $20 | $0.20 a spin | $0.10 a spin |
| $50 | $0.50 a spin | $0.20 a spin |
| $100 | $1.00 a spin | $0.40 a spin |
- Set a loss limit and a time limit before you start, and use the game's autoplay loss limit if you use autoplay at all.
- Treat a big win as a natural stopping point, not as a sign that the slot is "hot".
- Do not raise your stake to win back losses. It raises the total staked, and with it the average cost.
If you are playing through a welcome bonus, the same logic applies: a higher RTP lowers the average cost of the wagering, and very high volatility makes it more likely your balance runs out before you finish. Our guide to wagering requirements works through the numbers on our 30x bonus.
Frequently asked questions
What is the difference between RTP and volatility?
RTP is the share of all stakes a slot pays back over a very long run, for example 96%. Volatility is how it pays that back: often in small wins (low volatility) or rarely in large ones (high volatility). Two slots with the same RTP can have very different volatility.
Does a 96% RTP mean I get back $96 if I bet $100?
No. It is an average over millions of spins. In one session you can lose most of your stake or win far more than it; the RTP only describes the long-run average.
Why does the same slot show different RTPs on different sites?
Many providers release a title in several RTP versions and each casino chooses which one to run. The info panel inside the game shows the RTP of the version you are actually playing.
Is high volatility better for winning big?
It makes large wins possible but rarer, and long losing stretches more likely. It does not improve the average return. Choose it only with a budget that can cover more spins at a smaller stake.
Can a slot be "due" to pay out?
No. Every spin is independent. A slot that has not paid for a while is no more likely to pay on the next spin.