What the RTP figure is actually counting
RTP is calculated before a single round is played, from the game’s own probabilities. Understanding what goes into that calculation removes most of the ways the number gets misread.
Calculated from odds, not observed
Every game is a set of possible outcomes with a probability and a payout attached to each. RTP is the sum, over all outcomes, of the probability of the outcome multiplied by its payout, divided by the stake. It is arithmetic performed on the design of the game.
Because it is computed from the design, the figure is stable and known in advance. It does not drift depending on how the game has been running, and it is not affected by how many players are present or how much has been won or lost.
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A percentage of turnover, not of your deposit
The single most common misreading is to treat RTP as a percentage of the money you put in. It is a percentage of the total amount wagered — turnover — which is a different and usually much larger quantity, because the same money is staked over and over.
Turnover
The sum of every stake placed over the period. This is the base RTP is applied to. Re-betting the same winnings keeps increasing it.
Your balance
What remains in front of you at a point in time. It is not the base for RTP, and it rises and falls with variance along the way.
If you deposit 100 and stake it ten times over, turnover is 1,000. At a 96% RTP the expected return on that turnover is 960, and the expected cost is 40 — even though only 100 was ever deposited. The edge is charged against activity, not against the deposit.
The edge, stated honestly
The house edge is exactly the complement of RTP, and it is worth naming precisely: it is the expected share of turnover retained by the game over the long run. It is not revenue, not a fee, and not a charge applied at any moment. It is what the arithmetic does when the rounds are counted in the millions.
- It is proportional to activity. More turnover, more expected cost, at exactly the same rate.
- It is unconditional. It does not care whether you are winning or losing at the time; it applies to every round equally.
- It is unavoidable, but not instant. In any short window, variance can dominate the edge entirely.
Comparing one game with another
RTP differences between games look small — a point or two — but they multiply against turnover, and turnover is large. A three-point difference in RTP between two otherwise similar games is a three-unit difference in expected cost per hundred units staked.
| RTP | House edge | Expected cost per 1,000 staked |
|---|---|---|
| 99% | 1% | 10 units |
| 97% | 3% | 30 units |
| 96% | 4% | 40 units |
| 94% | 6% | 60 units |
Read the table as arithmetic, not as advice. It shows only how quickly a small difference in the edge compounds once turnover is counted properly — which is the reason the figure deserves a second look before you stake.
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