A Double bet is the simplest form of accumulator, combining two selections from different events into one single bet. For a return, both chosen selections must win; if either fails, the entire bet is lost. Highly popular across all sports, it offers a straightforward way to increase potential returns significantly compared to two single bets, serving as an ideal entry point into multiple betting.

A Double bet operates by compounding odds: your initial stake goes on the first selection, and if it wins, the entire return (stake plus winnings) automatically becomes the stake for the second selection. Both selections must win for the bet to succeed and pay out. If either selection loses, the entire Double bet is lost. The combined odds are calculated by multiplying the individual odds of each selection. For example, two selections at 2/1 (3.00 decimal) would yield combined odds of 8/1 (9.00 decimal).