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Français One bet, several legs
An accumulator (acca, parlay, combo) bundles several selections into a single bet. Every leg must win; one losing leg sinks the whole ticket. In exchange, the odds multiply rather than add, which is how a modest stake can return a large payout.
Three legs at 1.60, 1.75 and 1.90 combine to 1.60 × 1.75 × 1.90 = 5.32. A €10 acca returns €53.20 if all three land — far more than the €7.30 total profit the same €10 split across three singles would earn.
What multiplication does to your chances
Odds multiply, but so do probabilities — downward. If each of those three legs has a 60% true chance, the acca wins 0.6 × 0.6 × 0.6 = 21.6% of the time. Five such legs: 7.8%. Eight legs: under 2%.
This is the trade every acca makes: bigger payouts, sharply lower hit rate. There is nothing wrong with that trade if you make it knowingly and stake accordingly — small stakes, money you can afford to lose entirely.
The margin compounds too
Every leg carries the bookmaker's margin, and multiplying legs multiplies the margin as well. If the bookmaker keeps ~5% per leg, a treble bakes in roughly 14% of combined margin, and a six-fold over 25%. Long accas are structurally some of the most expensive bets on the menu.
Two practical consequences: keep accas short (2–4 legs), and price-shop each leg separately — a small price improvement per leg compounds in your favour exactly the way the margin compounds against you.
How our site handles accas
Our daily accumulator combines the model's highest-confidence picks from different matches — confidence first, precisely to avoid multiplying longshots into a lottery ticket. The combined odds and each leg's price are shown openly, and the acca calculator below lets you rebuild or modify the ticket and see the maths before staking anything.
Treat any acca — ours included — as entertainment with a known cost, not an income plan. No model changes the arithmetic of multiplied probabilities.
Four legs at 1.50 each: combined odds 5.06. If each leg's true chance is the 66.7% the price implies, the acca lands 19.7% of the time — about one week in five. The €50.60 return on a €10 stake feels generous right up until you count the four losing weeks around it.
- All legs must win; odds — and margins — multiply.
- Win probability falls fast with each added leg: five 60% legs win under 8% of the time.
- Short accas (2–4 legs) with shopped prices are the least expensive version of the format.
- Stake small: the defining feature of accas is that most of them lose.
Frequently asked questions
Is an accumulator better than singles?
Mathematically worse in expected value, because margins compound across legs. Singles preserve more of your edge if you have one; accas trade expected value for the chance of a large payout from a small stake.
What happens if a match in my acca is postponed?
Most bookmakers void that leg and recalculate the acca at the remaining legs' combined odds, so a four-fold becomes a treble. Check the individual bookmaker's rules — treatment of abandoned matches varies.
How many legs should an acca have?
If you must, 2–4. Beyond that the compounded margin and collapsing win probability make the ticket a lottery entry — fine as entertainment at pocket-change stakes, poor as a betting strategy.