Yes, in the Polymarket US app. Polymarket self-certified multi-leg sports contracts with the CFTC in May 2026 under the name "Combinatoric Athletic Outcome Contracts", opened them in beta on August 5, 2026 with up to 10 legs, and the app now shows them as "Build a Combo". The global polymarket.com site has no parlays. Combos are sports contracts, so they're unavailable in states where Polymarket's sports markets are restricted.
How a combo works
- Open Build a Combo in the US app.
- Add legs: outcomes from different sports markets (winners, totals, props). Beta allows up to 10.
- The app shows a price for the combination. It's a single contract that pays $1 if every leg wins and $0 otherwise.
- Buy as many contracts as you want at that price, subject to what's available.
Because it's a contract on an exchange, in principle it can be sold before all legs settle. In practice combo liquidity is thin, especially in beta, so don't plan on a clean exit.
How it's priced
A sportsbook builds a parlay from its own odds, with margin in every leg. Polymarket starts from market prices (each a crowd probability) and the combination is priced against them, with the sports category taker fee (5% × price × (1 − price)) on top. The result is often better than the equivalent sportsbook parlay, sometimes materially, but the spread on a fresh combo reflects how few people are quoting it. The first week of beta saw about $7.4 million in combo volume, small next to Kalshi's $3.5 billion in combos over a comparable week, and that gap shows up in pricing.
Polymarket combos vs Kalshi combos
| Polymarket US | Kalshi | |
|---|---|---|
| Launched | Beta Aug 5, 2026 | Same-game Sept 2025; multi-game since |
| Max legs | 10 (beta) | 30+ |
| Pricing | From market prices | Request for quote to market makers |
| Fee on buyer | 5% × P × (1 − P) | 7% × P × (1 − P) |
| Volume | Small, growing | ~30% of all Kalshi volume in 2026 |
If parlays are your main interest, Kalshi has the more mature product today. Details in Kalshi combos.
Where combos aren't available
Combos are sports contracts. In Nevada (geoblocked) and in states where Polymarket's sports markets are restricted, they're off. The restricted list changes with court orders; see Is Polymarket legal in the US?.
Sources: Polymarket's May 2026 CFTC self-certification as reported by CasinoBeats and Legal Sports Report (August 2026); polymarket.us (October 2026).