Parlay
What is Parlay?
A parlay (also called an accumulator or "acca" in the UK) is a single bet that links multiple selections together. Instead of placing three separate $100 bets, you put $100 on all three as one parlay. The odds multiply together, so the potential payout is much higher than betting each one individually.
The tradeoff: every single selection in the parlay must win. If one leg loses, the entire bet loses. A 5-leg parlay where 4 legs win and 1 loses still pays out $0.
Here's how the math works. Say you parlay three picks, each at 2.00 odds (even money). The combined odds are 2.00 x 2.00 x 2.00 = 8.00. A $100 bet returns $800 if all three win. Betting them individually at $100 each would cost $300 and return $600 total (3 x $200). The parlay costs less and pays more, but one loss kills it.
Most sportsbooks accept parlays with anywhere from 2 to 15+ legs. The more legs you add, the higher the potential payout and the lower the probability of winning. A 2-leg parlay at even odds has roughly a 25% chance of hitting. A 10-leg parlay at even odds has about a 0.1% chance.
You can mix different sports, different bet types (moneyline, spread, totals), and even pre-match and live selections in the same parlay. Not all combinations are allowed though. Sportsbooks block "correlated parlays" where one outcome directly affects another (like parlaying a team to win and the game to go over the total).
BlockBet offers an automatic parlay boost that adds extra value to every parlay with 4 or more legs: +10% for 4 legs, +15% for 5, +20% for 6, +25% for 7, and +30% for 8 or more. Each selection needs minimum odds of 1.5. No opt-in required.