Accumulator mechanics
The combined decimal price is produced by multiplying the price of each leg. One losing leg normally loses the full accumulator; a void leg is usually removed and the price recalculated under house rules.
Accumulator versus Bet Builder
Unibet's Bet Builder is documented. A standard accumulator combines outcomes from different events; a Bet Builder combines compatible outcomes from one event.
Offer restrictions
New GB customers only, 18+. Opt in and deposit £10+ via debit card only. Place a £10+ qualifying bet on sports (excluding Racing, Greyhounds and Trotting) at odds of Evens (2.0)+, which must settle within 7 days of registering. Receive £30 in Free Bets: 2 x £10 to use on Bet Builder (min 4 selections) and 1 x £10 to use on Accumulator (min 4 selections). Free bets not valid on racing, greyhounds, trotting or virtuals. Cashed-out qualifying bets do not qualify. Free Bets are non-withdrawable and must be used within 7 days. Enhanced-odds bets do not trigger the bonus. T&Cs apply. begambleaware.org. Check whether a promotion requires a minimum number of legs or minimum price per leg.
Sources checked
Operator-owned information reviewed 1 August 2026. Product pages and terms can change.