Combos

What a Combo is

A Combo — what other places call a parlay — has from 2 to 50 legs. Each leg is one outcome of one market. Your stake buys Combo shares that pay $1 each if every leg wins.

To win is your total payout if every leg wins: your stake divided by the quoted price. It includes your stake — it is not profit.

The same-game builder

Combos lists upcoming and live games — Soccer, Football, Basketball, Baseball, Hockey, Tennis, Esports, UFC & Boxing, Cricket, and more sports — and opens each game on its own board. Any market of that game that Polymarket has enabled for Combos can be a leg: the result, spreads, totals, halves, exact scores, corners, player props and more, grouped in the venue’s own tabs.

Several legs from the same match are allowed. When a new pick clearly cannot win alongside one you already have — both sides of one market, or two answers in a group where only one can be right — the app swaps it in for the old one. Polymarket itself refuses other combinations that contradict each other.

A leg whose market has closed is marked “No longer open for combos — remove it”, and has to go before you can get a price.

How the quote is priced

1. While you build, the ticket shows an estimate: the legs’ prices multiplied together, as if they were independent. Its rows say (est.). A leg without a live two-sided book has no price, and then no estimate is shown at all.
2. Asking for a price sends a request for quote (RFQ) to Polymarket’s market makers, directly from your browser.
3. A quote can be accepted only briefly — market makers hold a price for seconds, not minutes. After that the button becomes Get a new price. Changing a leg or the stake throws a quote away.
4. You sign the order in your browser, and the market maker fills it.

Correlation: why the quote differs

Once a quote arrives, the ticket shows two numbers side by side: Legs alone, if independent ×A and The quote pays ×B. “The difference is what the maker charges for how the legs move together, and for its own risk.”

Legs from the same game often move together: a team that wins tends to cover its spread, too. When legs tend to win together, a maker pays less than the independent figure; the quote can also come out higher. Either way, the ticket shows you the gap rather than hiding it.

What you sign is bounded

Before signing, the app checks the market maker’s quote against what you approved, on both sides: you never give up more than the stake you typed, and you never receive fewer shares than your ticket shows, beyond a small rounding allowance. If either limit cannot be confirmed, nothing is signed. Cashing out is checked the same way.

If the app loses contact after you sign, it does not report a failure. It says:

“We lost contact before confirming this combo. It may still have been placed — check your combos before trying again.”

Fees

The Combo ticket has no separate fee line. The market maker’s charge is inside the price it quotes, which is why the ticket shows the quote next to the independent estimate.

Claiming and cashing out

When a Combo wins, Claim redeems its payout into your balance, without gas. While a Combo is open, Cash out asks the market makers for a price to sell it back — often none quotes one, so plan to hold to the end.

Cashing out, and on newer accounts placing a first Combo, each need a one-time approval, signed by your wallet.