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An accumulator is a bet that combines multiple selections into a single wager that gains a return only when all parts win.
The advantage of an accumulator is that winnings are much higher at the expense of increased risk, only a single selection need lose for the entire bet to lose.
In the case of a non-runner, returns are calculated as though the accumulator hadn't contained the selection i.e. a six-fold would become a five-fold. Dead heats for a winning position are settled at reduced odds using standard rules. Bonuses of a fixed percentage and enhanced accumulator odds are regularly made available at bookmakers including Bet365 and skybet.
Accumulators are available for all sports, however bookmakers vary in their rules on combining selections from more than one to create a single bet. Selections from the same event cannot be combined into a single accumulator, this is to prevent anyone trying to place several bets on the same runner. More formally the selections must be mutually independent.
Due to the all or nothing nature of the accumulator some punters like to hedge their risk by placing bets on the folds of their wager so that it is still possible to gain a return even when not all selections win e.g. a person placing a 6-fold accumulator might also place a stake on the 6 smaller 5-fold accumulators so that should one selection fail to win, not everything is lost.
An accumulator is a bet of 4 or more selections. Those with fewer than 4 behave the same but have different names as detailed below:
|Number of selections||Bet Name|
An upper limit to the number of selections doesn't exist, making it possible to pick bets that could win big as this man found when he won £1.45m from a £2 horse racing bet.
The steps taken to calculate returns are outlined below using examples from horse racing and football. You won't need to work out returns by hand each time, once you are comfortable with how things work you can enter odds into the accumulator calculator to speed things up.
Consider the following 4-fold football accumulator.
|Match Result||Selection||Odds (Decimal)||Bet Outcome|
|Manchester United 1 - 0 Fulham||Manchester United To Win||1.5||Successful|
|QPR 2 - 1 Reading||Reading To Lose||1.4||Successful|
|Chelsea 1 - 1 Newcastle||Chelsea To Draw||3||Successful|
|Stoke 0 - 0 Arsenal||Arsenal To Draw||5||Successful|
Assuming a bet of £5 the calculation using decimal odds is as follows:
The equivalent calculation using fraction odds would be:
If any selection fails to win, the stake is lost. For instance in the example above if Manchester United had failed to beat Fulham, the "Manchester United To Win" selection would have lost and hence so would the accumulator, resulting in an overall loss of £5.
An each way accumulator bet consists of two parts:
A unit stake is placed on each of the 2 parts with the returns pooled to reach the total returns for the wager.
Consider the following horse race accumulator:
|Selection||Odds (Fractions)||To Place||Bet Outcome|
|3||3/1||1/5||Placed (came 2nd)|
Assuming a unit stake of £5 the returns would break down as follows:
The total returns for the bet is the result of adding together the returns from the 2 parts.
Last Update: 6th August 2019
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Accumulator returns calculator - Work out winnings for every possible variety of accumulator bet. Supporting fold options, each way bet, dead heats, rule 4 deductions and more. This calculator is the most comprehensive betting tool available online.
What is a double bet? - Only have 2 selections in your accumulator? Then a double is what you have. This page gives a complete football based example of the calculations undertaken to work out how much is returned for a double bet.
What is a treble bet? - A 3 selection accumulator is referred to as a treble. The article goes through a football example showing in detail each step necessary to calculate winnings for this bet.