- Bookie Ledger
- Betting terms and conditions explained
- Accumulators: how combined bets are built and paid
Term
Accumulators: how combined bets are built and paid
An accumulator combines several selections in one bet, and every leg must win for the bet to pay. The decimal odds of the legs are multiplied together. In the example here, a treble at 2.00, 3.00 and 1.50 has combined odds of 9.00, so a €10 stake returns €90.00.
What is an accumulator?
An accumulator, or acca, is one bet that combines two or more selections. Each selection is a leg.
A double has two legs and a treble has three. Larger accumulators use the same method with more legs. Every leg must win for the bet to pay. One lost leg loses the whole bet.
Bottom line: an accumulator is a single bet in which all legs must win.
How are the odds and returns worked out?
Convert each leg to decimal odds, multiply them, then multiply by the stake. The odds below are examples, not prices from any operator.
| Bet | Legs and decimal odds | Combined odds | Return if all legs win |
|---|---|---|---|
| Double | 2.00 × 3.00 | 6.00 | €60.00 |
| Treble | 2.00 × 3.00 × 1.50 | 9.00 | €90.00 |
| Four-fold | 2.00 × 3.00 × 1.50 × 2.00 | 18.00 | €180.00 |
| Treble, one leg lost | 2.00 × 3.00 × 0.00 | 0.00 | €0.00 |
| Treble, middle leg void* | 2.00 × 1.00 × 1.50 | 3.00 | €30.00 |
*The void row assumes the rules treat a voided leg as odds of 1.00. Check the operator's rules, because we have not recorded them.
Bottom line: combined odds are the product of the leg odds, so one lost leg returns nothing.
What happens to a void or non-running leg?
Operators set their own rules for a leg that is voided. We did not record any operator's wording on 7 November 2026, so the table is a layout to be filled once each licence is confirmed.
| Operator (candidate, licence to be confirmed) | Rule wording | Source | Checked |
|---|---|---|---|
| bet365 | Could not be verified on 7 November 2026 | Operator rules page, URL to be recorded | 7 November 2026 |
| Paddy Power | Could not be verified on 7 November 2026 | Operator rules page, URL to be recorded | 7 November 2026 |
| BOYLE Sports | Could not be verified on 7 November 2026 | Operator rules page, URL to be recorded | 7 November 2026 |
Bottom line: void-leg treatment is set by each operator, and we have not yet recorded it.
Are Lucky 15 and Yankee bets accumulators?
These are not single accumulators. A Lucky 15 on four selections is 15 separate bets: four singles, six doubles, four trebles and one four-fold. A Yankee is 11 bets: six doubles, four trebles and one four-fold.
The stake is charged for each bet. We did not test how operators display them.
Bottom line: a Lucky 15 is 15 bets and a Yankee is 11, each with its own stake.
Where to go next
- Try your own legs in the bet-slip simulator.
- Convert fractional prices with odds formats.
- Read how each-way bets split a stake.
- Compare cash out wording in cash out explained.
Bottom line: each link stays inside this site.
What changed?
No changes recorded since first publication on 7 November 2026.
Bottom line: this is the first version of the page.