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PARLAYS & COMBOS · CHECKED 6 OCT 2026
Why a parlay costs more
Yes, on sports. Polymarket calls them combos: the international site offers them on moneyline, spread and total markets, and Polymarket US allows 2 to 10 legs with a combo fee of its own.
Combo cost, leg by leg
POLYMARKET
LEGS AT 62¢ EACH
3
−
+
Combined chance23.8%
Fair payout on $50$209.79
Polymarket US combo fee−$3.66
Kept of the win98%
Illustrative at a flat 62¢ per leg, with Polymarket US's published combo formula applied to the combined price.
THE RULES, SOURCED
The payout multiplies the implied probabilities of each leg, and one losing leg loses the combo help.polymarket.com ↗. Polymarket US charges C x p x [0.0695 x (1 - p) + 0.06 x (1 - p)^4] on the combo price docs.polymarket.us ↗, and removed the maker rebate on combo trades from 7 October 2026 docs.polymarket.us ↗. The international site publishes no combo fee.
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