What is an accumulator?
An accumulator or acca bet is a bet that contains 4 or more selections. Much like a treble or double bet the odds are multiplied together to create larger returns. The increased profit potential is offset against the greater risk as all selections must win in order for us to see a return.
If one of your selections is cancelled or the horse is a non runner the accumulator will be automatically adjusted to be as if though that selection had not existed. So a five fold would become a four fold. So your bet won’t lose in the case of a non runner.
Many bookmakers will offer increased odds on certain pre set accumulators, sky bet usually do this at least once a week. Bookies favour punters placing accumulator bets as they know they will make money out of them long term. Many bookies also offer accumulator insurance so that if one selection loses you get your stake back as a free bet. Usually there must be at least 5 selections to qualify for a refund and some bookies stipulate minimum odds. However these bonuses and refunds are designed to encourage people to place accumulator bets.
Like a treble and double the decimal odds are multiplied together to give the overall odds. Meaning we can have many low odds selections and still get a potentially massive return if they all win.
Here is a story about a man who won £450,000 from a 20p 6 selection accumulator bet: