What Is RTP?
Return to Player (RTP) is a percentage that describes how much of the total money wagered on a slot machine is paid back to players over time. For example, a slot with a 96% RTP will, in theory, return £96 for every £100 wagered — keeping £4 as the house edge.
It's important to understand that RTP is a long-term statistical average, not a guarantee for any single session. Over millions of spins, the math evens out — but your individual experience will vary significantly.
How Is RTP Calculated?
Game developers and independent testing labs calculate RTP by running simulations of tens of millions of spins. The formula is straightforward:
- RTP (%) = (Total Returned to Players ÷ Total Wagered) × 100
Certified labs such as eCOGRA, iTech Labs, and GLI audit these numbers before a game goes live. Reputable online casinos display verified RTP figures in the game's paytable or information screen.
What's a "Good" RTP for a Slot?
While any RTP is technically "the house edge in reverse," here's a general guide to what players consider good, average, or below average:
| RTP Range | Rating | What to Expect |
|---|---|---|
| 97% and above | Excellent | Low house edge, favourable long-term returns |
| 95% – 96.99% | Good | Industry standard, solid choice |
| 92% – 94.99% | Average | Acceptable but below the norm |
| Below 92% | Poor | Avoid where possible |
RTP vs. House Edge
RTP and house edge are two sides of the same coin. If a slot has a 96% RTP, the house edge is 4%. Unlike table games where skill can sometimes influence outcomes, slot RTP is fixed by the game's programming — you cannot change it through betting patterns.
Where to Find a Slot's RTP
You can find the RTP for any online slot in several places:
- The game's built-in information or paytable screen (look for an "i" icon)
- The game developer's official website
- The online casino's game details page
- Independent slot review sites and databases
Key Takeaways
- RTP is a long-term average — short sessions can deviate significantly from it.
- Always look for games with RTPs of 95% or higher when possible.
- RTP alone doesn't tell the whole story — volatility matters just as much.
- Independent certification ensures the RTP figure is accurate and audited.
Understanding RTP is your first step toward making smarter, more informed choices at online casinos. Pair this knowledge with an understanding of volatility, and you'll be much better equipped to choose games that suit your playing style.