Two Numbers That Really Matter
When choosing an online slot, two metrics stand out above all others: RTP (Return to Player) and volatility. While they're related, they tell you very different things about a game. Understanding both — and how they interact — puts you in a much better position when selecting which slot to play.
RTP Explained
RTP is a percentage that tells you how much of all money wagered on a slot is theoretically paid back to players over a very large number of spins. A slot with a 96% RTP would, in theory, return £96 for every £100 staked across its entire lifespan.
What RTP does NOT tell you:
- How much you personally will win or lose in any given session.
- When wins will occur — it's a long-run average across millions of spins.
- The size of individual wins.
Despite its limitations, RTP is still a useful filter. As a general guide:
- Below 94%: Low — look for better options.
- 94%–96%: Average — acceptable.
- 96%–97%: Good — solid value.
- Above 97%: Excellent — look for these where possible.
Volatility Explained
Volatility describes the pattern of how a slot pays out. It's the risk profile of the game — essentially telling you whether you're likely to win smaller amounts regularly, or larger amounts rarely.
Low Volatility Slots
These games pay out more frequently but the wins tend to be smaller. They're ideal for players with modest bankrolls who want to enjoy longer sessions without running out of funds quickly. The trade-off is that big wins are rare.
Medium Volatility Slots
These sit between the two extremes, offering a balanced mix of frequency and size of wins. They suit most players and are often the most broadly enjoyable.
High Volatility Slots
These games may have long dry spells with few wins, but the wins that do land can be substantial. They require a larger bankroll to sustain play through losing runs. They're best suited to players who enjoy the excitement of chasing big payouts.
How RTP and Volatility Work Together
RTP and volatility are not the same thing, but they affect your experience together. Consider two slots, both with 96% RTP:
| Slot | RTP | Volatility | Experience |
|---|---|---|---|
| Slot A | 96% | Low | Frequent small wins, steady bankroll |
| Slot B | 96% | High | Long dry spells, rare big payouts |
Both return the same amount in theory over millions of spins, but your moment-to-moment experience will feel completely different. Slot A feels generous; Slot B feels brutal at times, with explosive moments of reward.
Matching Slots to Your Bankroll and Goals
Small Bankroll?
Prioritise low-to-medium volatility slots with a high RTP. You'll get more spins for your money and a more consistent experience.
Larger Bankroll?
You can absorb the variance of high-volatility slots, which opens up games with bigger jackpot potential and more dramatic bonus features.
Playing for Entertainment?
Focus on medium volatility and strong bonus features — games that feel rewarding and engaging regardless of the size of individual wins.
Chasing a Big Win?
High volatility, high RTP slots are your target — but go in with realistic expectations and a budget you're comfortable losing.
Where to Find RTP and Volatility Information
Most reputable slot games list their RTP in the game's information screen or paytable. Volatility is less consistently disclosed but can usually be found through:
- The game developer's official website.
- Reputable casino game review sites.
- The casino's own game description page.
Final Takeaway
RTP sets the theoretical value of a slot; volatility defines your experience playing it. Used together, these two metrics give you a clear picture of what to expect from any game — and help you make a more informed choice before you stake a single penny.