Two Numbers Every Slot Player Should Understand
When researching slot games, you'll constantly encounter two key terms: RTP and volatility. Many players confuse the two or don't fully understand what they mean in practice. This guide breaks down both concepts clearly, explaining how they interact and how they should inform your game selection.
What Is RTP?
RTP — Return to Player — is a percentage that represents the theoretical amount a slot game pays back to players over an extremely large number of spins. If a game has an RTP of 96%, the theoretical model suggests that for every £100 wagered across millions of spins, £96 is returned as winnings.
What RTP does NOT mean:
- It doesn't mean you'll get back 96p for every £1 you stake in a session
- It doesn't guarantee how much you'll win or lose today
- It only becomes meaningful across enormous sample sizes
RTP is calculated by game developers and verified by independent testing labs. It's a design characteristic of the game, not a promise of individual results.
What Is Volatility?
Volatility (also known as variance) describes the pattern of payouts in a slot game. It tells you how risky a game feels to play in the short term:
| Volatility Level | Win Frequency | Typical Win Size | Best For |
|---|---|---|---|
| Low | High | Smaller amounts | Casual players, longer sessions |
| Medium | Moderate | Moderate amounts | Most players |
| High | Low | Larger potential wins | Players comfortable with risk |
How RTP and Volatility Work Together
Two games can have the same RTP but wildly different experiences. For example:
- Game A: 96% RTP, low volatility — pays out small amounts frequently
- Game B: 96% RTP, high volatility — pays out less often, but wins can be much larger
The total theoretical return is the same, but the session experience is completely different. This is why volatility often matters more than RTP when choosing a game that suits your playing style.
Hit Frequency: Another Useful Metric
Hit frequency refers to how often a spin results in any winning combination. A game might have a 30% hit frequency, meaning roughly 3 in 10 spins produce a payout of some kind. This is closely linked to volatility but provides a more specific measure of how often the win counter activates.
How to Choose Based on Your Goals
- Want entertainment that lasts longer? Choose low-to-medium volatility with a decent RTP (95%+)
- Chasing bigger prize potential? High volatility suits this, but accept that dry spells are part of the experience
- Tight budget? Prioritise lower volatility to extend your sessions
- Larger budget, higher risk tolerance? High volatility games offer more dramatic swings
Where to Find This Information
Most reputable game developers publish RTP figures in the game's paytable or information screen. Volatility ratings are often listed on casino information pages or game review sites. If you can't find this information, it may be worth choosing a different, more transparent game.
Understanding both RTP and volatility transforms slot selection from a guessing game into an informed choice aligned with your personal preferences and playing style.