Winning an acca is no mean feat, even a tiddly 4-fold. So if you ever manage to get one right, many bookies reward you further with the acca bonus offers they have in place.
This boosts your winnings by a pre-determined amount, turning a big win into an even bigger win.
An acca bonus is a very common promotion so you will find them at most online bookies, especially the bigger names. They are usually automatic as well so you won’t typically need to opt in or anything like that.
You have to watch the terms and conditions with these if you want to give yourself the best chance though. What’s more, they aren’t always quite as exciting as the marketing might suggest.
Don’t get me wrong, they are a very worthwhile promotion, but the advertised maximum boost on winnings is often practically unachievable. As with many other types of bookie offers, some acca bonuses are better than others.
Here is all the information you need to understand them, as well as some recommendations.
Current Accumulator Bonus Offers

Winning accas containing legs from any sport, pre-match or live, could get a winnings bonus up to £5,000 with 10bet. The percentage boost depends on the number of legs in the bet, opening with a 5% boost for trebles, increasing incrementally to 100% for 15-folds or greater. Minimum odds per selection of 1/2 (1/5) applies.

Sports accumulators with 3+ legs could get a bonus added to winnings of up to 100%. Trebles can get a 3% bonus rising with added legs to 100% for winning 14-folds. To qualify bets must have odds of at least 1/5 (1.2). To claim this bonus, ‘Acca Boost’ must be selected via ‘Acca Rewards’ in your betslip. Max payout of £1,000 per acca.

Betfred’s Acca Flex offer means that you could get a cash bonus of between 2.5% and 100% on winning football accumulators. To qualify your acca must have at least 5 legs, each with odds of 1/2 (1.5) or greater on selected pre-match markets including the match result, both teams to score, or total goals over/under. The potential bonus increases with the number of legs in the bet, starting with a 2.5% bonus for 5-folds, rising to 100% 20-folds.
How Do They Work?
I’m calling it an acca bonus, but you often see them called acca boosts too. Some bookies have their own unique names for them, such as Acca Flex, but whatever they are called they are easy to recognise,
It’s nice and easy to understand an acca bonus too, because it is simply a percentage boost on your winnings should your bet come off. If you win, your winnings will be paid out as normal but an additional amount will be added by the bookie. That’s it.
However, the bonus amount on top of any winnings is almost always on a sliding scale. That means working out the total payout you might receive can be a little more complicated. It also means that the headline percentage boost might be almost impossible to achieve.
Let me explain.
Acca bonus offers only kick in once an acca is a certain size. It’s usually quite small, 3-folds or 4-folds, which makes it an offer anyone can take part in. However, a 3-fold acca might only pay a 5% bonus, with every additional selection added to the acca boosting the bonus further.
This encourages bettors to place larger accas, but of course, the larger the acca the less chance you have of winning it.
Each bookie will have their own acca bonus structure, but here is a typical example:
- 3-fold – 5%
- 4-fold – 10%
- 5-fold – 15%
- 6-fold – 20%
- 7-fold – 25%
- 8-fold – 30%
- 9-fold – 35%
- 10-fold – 40%
- 11-fold – 45%
- 12-fold – 50%
- 13-fold – 55%
- 14-fold – 60%
- 15-fold – 65%
- 16-fold – 70%
- 17-fold – 75%
- 18-fold- 80%
- 19-fold – 90%
- 20-fold – 100%
This would be advertised as a 100% boost on winnings! Sounds brilliant, doesn’t it? Now ask yourself the last time you or anyone you know placed and won a 20-fold acca. I’ll wait…
Realistically, it’s just not going to happen.
Punters are better off finding the bookie offering the best percentage boost for the size of the acca they want to place. In other words, build your acca first and then go find the acca bonus which gives you the best boost on that acca.
The other reason these 100% boost offers aren’t all they are cracked up to be is that the terms and conditions often kick in to cap bonus returns.
Common Terms and Conditions
As always, acca bonus promotions come with a list of terms and conditions.
Like the bonus itself, these terms will be unique to each bookmaker, but there are some common themes I can talk about so you know what kind of thing to expect.
First, sometimes these promotions are limited to a specific sport or group of sports. So you might only qualify for the acca boost if your acca is made up of football selections. The terms may even stipulate the specific markets, leagues or competitions within the sport.
There will probably be minimum odds stipulations too. This means that each selection must be priced at a minimum level, maybe around 1.5 or 1/2. There may be a minimum combined odds stipulation instead (or as well) of something like 3/1. As I said, it will be different at each bookie so check the specific terms.
Minimum stakes are less common with acca boosts, but that doesn’t mean you won’t come across them so be aware.
The big one to look out for is the maximum boost. This refers to the maximum financial boost, not percentage boost. For example, consider a promotion which states a 100% bonus for a 20-fold but a £12,000 maximum boost. Most 20-fold accas are going to have a payout far exceeding £12,000 – unless you are betting at super small stakes – so be sensible.
There’s no point adding additional selections that would take you past the maximum boost unless you strongly believe in the outcome. What I’m saying is don’t chase bigger percentage boosts. Make your bet as you normally would, but be aware of your stake size in relation to the odds and the maximum boost.
Cancelled Selections
A key term with acca bonuses it what happens if a selection is cancelled.
For example, if you have an 8-fold acca on the horses and one of the races is cancelled due to bad weather, what happens?
Your bet will still stand, but the selection will be struck from the acca. This would change it from an 8-fold to a 7-fold. Accordingly, if your bet won you would receive the acca bonus associated with the 7-fold acca not the 8-fold.
This might seem unfair – the cancellation wasn’t your fault after all, but it wasn’t the bookies’ either. Plus, your bet just got easier to win when you think about it, so it’s only right that the bonus is adjusted.
The odds of your acca will reduce too. This is standard practice with accas, with or without a bonus attached, so if it happens to you there is nothing fishy going on.
I have never seen this situation handled any differently in all the time I have been reading terms and conditions, so you can expect this to be the procedure wherever you place your acca bets.