The worked example
Four teams to win, each at evens (2.0): the combined odds are 2 × 2 × 2 × 2 = 16.0, so a £10 acca returns £160 including stake. Beautiful. The honest half: each leg carries the bookie's margin, and multiplying four margined prices together compounds the house edge — accas are the most profitable product bookmakers sell. Bet them for the buzz, size them like entertainment.
£10 stake, compounding even-money legs
Single
Double
Treble
4-fold
Offers that suit accas
Betway's welcome was built for acca people — £30 matched plus a £30 Uber Eats voucher if your first acca loses. And free bets generally are the right fuel for long accas: stake-not-returned rules sting least at big combined odds, and the stake was never yours. Decodes: Betway, and the full wall.
The acca family
Doubles and trebles are just small accas; four-fold and up is where the name kicks in. Each-way accas split every leg into win and place halves. And acca insurance — increasingly a standard bookie feature — refunds a one-leg-from-glory acca as a free bet, which is less generous than it sounds (the refund is stake-not-returned money) but softens the classic heartbreak.
The mistake everyone makes
Adding legs because they 'feel free.' Every leg multiplies the odds — and the bookmaker's margin, and the ways to lose. The five-fold that dies on leg five isn't bad luck; it's the maths you signed up for. Size accas as entertainment, cap the legs where the fun stops compounding, and let free bets carry the wildest ones.
Frequently asked
How many legs should an acca have?
There's no right number — each added leg multiplies both the potential odds and the compounded margin, so the honest answer is: as many as still feels like fun when it loses. Convention says three to five for regulars; the maths says fewer is always more efficient; free bets say the ten-legger is their job.
