Slot volatility explained
Volatility, also called variance, describes how a slot spreads its payouts. It decides whether a session is a steady trickle or a long wait for one big moment.
By Ryan Jessop. Last checked .
Key takeaways
- Low volatility: frequent, small wins.
- High volatility: rare, larger wins, long gaps.
- Volatility does not change the long-run RTP.
- Match volatility to your budget and patience.
What volatility is
Two slots can both return 96% over time and feel nothing alike. One pays a little on most spins. The other pays almost nothing for long stretches, then a lot at once. That difference is volatility. It is a rating set by the developer, usually low, medium or high.
What each level feels like
| Feature | Low | High |
|---|---|---|
| Win frequency | Often | Seldom |
| Typical win size | Small | Mostly small, occasionally very large |
| Where the return sits | Spread through the base game | Concentrated in features |
| Effect on a fixed budget | Lasts longer, drifts down slowly | Can vanish quickly or jump suddenly |
| Maximum win | Lower, such as 500x | Higher, such as 5,000x or more |
| Reviewed example | Starburst | Gates of Olympus, Book of Dead |
Our reviewed slots by volatility
| Slot | Volatility | Max win | Where the big wins come from |
|---|---|---|---|
| Starburst | Low | 500x | Three expanded wild reels |
| Big Bass Bonanza | High | 2,100x | Fisherman collections in free spins |
| Book of Dead | High | 5,000x | A premium expanding symbol |
| Gates of Olympus | High | 5,000x | Stacked multipliers in free spins |
| Fluffy Favourites | High | 5,000x | Tripled wins in free games |
| Sweet Bonanza | High | 21,100x | Multiplier bombs in free spins |
The games at the top of the scale are listed on high volatility slots, and the slots budget guide goes further on stakes and sessions.
Volatility and your budget
The practical question is how many spins your budget buys and whether that is enough for the game to show what it does.
| Stake | Spins | Suits |
|---|---|---|
| 10p | 200 | Any volatility |
| 20p | 100 | Low or medium |
| 50p | 40 | Low only |
| £1 | 20 | Too few for a high volatility slot |
On a high volatility slot the feature may arrive once in a couple of hundred spins or less often. A budget that buys 20 spins is very unlikely to see it.
Volatility and bonuses
Free spins on a high volatility slot, such as PlayOJO's on Big Bass Bonanza, will often return little and sometimes a lot. Wagering a bonus on a high volatility game raises the chance of losing it before you finish. See the slot bonuses page.
Common misunderstandings
- A slot is never 'due'. Each spin is independent.
- High volatility is not higher RTP. They are separate measures.
- A long losing run does not mean a game is broken; on high volatility slots it is expected.
- Changing stake does not change volatility, only how fast your balance moves.
For the other half of the picture, read RTP explained.
Play safely
Slots are fast, and they are designed so the house wins over time. Decide what the session is worth to you before you open a game, set a deposit limit, and stop when the money is gone. Free, confidential help is available from the National Gambling Helpline on 0808 8020 133. Our safer gambling page lists the tools and services.
Frequently asked questions
What is slot volatility?
A measure of how a slot distributes wins: often and small, or rarely and large.
Is high volatility better?
Neither is better. High offers bigger potential wins with longer losing runs.
Which slots are low volatility?
Of our reviewed slots, Starburst.
Does volatility affect RTP?
No. They are independent.