Accumulators: the margin multiplies
An accumulator's odds multiply, and so does the share the bookmaker keeps. In the example, four legs that each keep about 4.8% make an accumulator that keeps 17.7%. At €10.00 a week for 10 years, that is €921 on average.
Type in the odds
The figures shown are an example we typed, not any bookmaker's odds. Decimals may be written with a point or a comma.
Type 1 to 20 legs with at least two odds each, and check the stake, the bets a week and the years (up to 60).
The 4-leg accumulator pays 14.65 and keeps 17.7% of every bet; the legs alone keep on average 4.8%.
It lands 1 in 17.8 (5.62%), at the market's own chances.
At €10.00 a bet: 520 bets over 10 years, €5,200 staked. On average you lose €1.77 a bet, €92 a year and €921 in all, and about 29.2 of them land.
The calculation runs in your browser and needs JavaScript. The figures here are the example's.
How it is worked out
The legs' odds multiply, and so do their chances without the margin, as the legs are taken to be independent. What an accumulator returns is the product of what each leg returns, so the share the bookmaker keeps grows with every leg.
A second, independent calculation must give the same figures, or the page is not published.
What this leaves out
- It does not say who will win. Every result is measured at the market's own chances, with the margin taken out.
- Tax on winnings and any charges.