What is the RTP of a sports bet?
Published on 29 July 2026
Open any sports betting site: odds are everywhere. But one number never appears on screen — the share of the stakes that those odds actually give back to players. That is exactly what the RTP measures.
The definition
The RTP (Return To Player) is the percentage of the stakes that a betting market gives back to bettors, on average. An RTP of 94% means that for every €100 staked on that market, across all outcomes, the odds pay back the equivalent of €94 in winnings — the remaining €6 is the bookmaker's margin.
Two things matter when reading it. First, the RTP is not an individual promise: on any single bet you win or you lose. It is a structural average, the one that applies to all bettors combined over time. Second, the RTP is measured market by market: every match and every bet type has its own, and the gaps are much wider than most people imagine.
Where it comes from: implied probabilities
Every odd hides a probability. To reveal it, invert the odd: decimal odds of 2.00 imply a probability of 1 ÷ 2.00 = 50%. Odds of 4.00 imply 25%.
If odds were "fair", the implied probabilities of all outcomes of a match would add up to exactly 100%. In practice the total always exceeds 100% — and that excess is where the margin lives.
Example on a football match (1X2) — odds: home win 2.05, draw 3.50, away win 3.55.
Implied probabilities: 1÷2.05 = 48.8%; 1÷3.50 = 28.6%; 1÷3.55 = 28.2%. Total: 105.5%.
RTP = 100 ÷ 105.5 × 100 = 94.8%. Bookmaker's margin: 5.2%.
In other words: on this specific market, every euro staked by bettors as a whole is "charged" about 5 cents, whatever the result of the match.
Why bookmakers never display it
The margin is the price of the service — and since it is baked into the odds, it is invisible to the naked eye. No regulation requires displaying it market by market. Odds of 1.85 on one tennis match look identical to odds of 1.85 on another; yet depending on the opposite odd, the RTP of the two markets can differ by several points. That is the whole point of computing the RTP: making the price you pay visible.
A rate that varies more than you would think
The RTP is not a constant of the operator: it varies with the competition, the market type and the timing. Heavily publicised fixtures (a Premier League derby, a European final) often carry RTPs of 90 to 95% — and that generosity is offset by heavier margins on less visible markets: lower divisions, side markets (correct score, goalscorers, etc.). Hence the value of measuring the RTP of the exact market you are considering, rather than assuming it is constant.
A side note: in some countries the RTP is also a regulatory concept. In France, for instance, the average annual RTP of licensed online sports betting operators is capped at 85%.
How to use it in practice
Three simple uses. Know the real price of a bet before taking it. Compare market types with each other — computing the margin reveals systematic gaps. And compare operators on the same match, which is a far more reliable method than bonuses for judging an offer.