Sponsored by Polymarket US
Polymarket US vs Underdog
Checked November 4, 2026. Polymarket US's own rules govern.
Side by side
| Polymarket US | Underdog Predict | |
|---|---|---|
| Regulation | CFTC-regulated exchange | CFTC-registered futures commission merchant; its affiliate UDX is a CFTC-regulated exchange |
| Markets | Sports, politics, crypto and more | Sports first: NFL, NBA, NHL, MLB, college and more, varying by exchange |
| Fees | Taker fee 6.95% × price × (1 − price) per contract, max $1.74 per 100 | $0.01 a contract, per side, plus exchange fees |
| Availability | Polymarket US is available in every state except Nevada. | Underdog Predict is available in 46 states and Washington, D.C., and not in Arizona, Michigan, Nevada or New York. |
| App | The Polymarket App (iOS and Android) and polymarket.us | Underdog app |
What each one charges
Polymarket US charges Taker fee 6.95% × price × (1 − price) per contract, max $1.74 per 100, about 1.74¢ a contract at 50¢. Polymarket US fees has the formula.
Underdog Predict charges $0.01 a contract, per side, plus exchange fees. On contracts that trade on UDX, Underdog's own exchange, the taker fee is about 1.75¢ a contract at 50¢, so about 2.75¢ with the commission. Other exchanges set their own fees. Underdog names UDX, Kalshi and Crypto.com | Derivatives North America as exchanges, and its help center's worked example shows a 2¢ exchange fee per contract, marked illustrative. Which fee applies depends on the exchange behind your contract, so check the amount before you confirm.
Keep reading
Frequently Asked Questions
What is the difference between Polymarket US and Underdog?
Polymarket US is a CFTC-regulated exchange reached through the Polymarket App, and it lists sports, politics, crypto and more. Underdog Predict is a CFTC-registered futures commission merchant inside the Underdog app, built around sports, that offers contracts from exchanges including its own, UDX. Fees and available states differ.
Is Underdog or Polymarket US better for sports?
It depends on the contract and the state. Underdog Predict sits in the Underdog app and offers sports contracts from more than one exchange. Polymarket US is one exchange that lists sports alongside politics, crypto and more. Compare the price and every fee on the contract you want.
Which is cheaper, Polymarket US or Underdog?
It varies. Polymarket US charges Taker fee 6.95% × price × (1 − price) per contract, max $1.74 per 100, about 1.74¢ a contract at 50¢. Underdog Predict charges $0.01 a contract, per side, plus exchange fees. On contracts that trade on UDX, Underdog's own exchange, the taker fee is about 1.75¢ a contract at 50¢, so about 2.75¢ with the commission. Other exchanges set their own fees.
Is Underdog Predict available in my state?
Underdog Predict is available in 46 states and Washington, D.C., and not in Arizona, Michigan, Nevada or New York. Availability follows where you are when you trade, not where you live. Polymarket US is available in every state except Nevada.
Sponsored by Polymarket US
18+ Only. Restrictions and eligibility requirements apply. Not available in all jurisdictions. Trading is risky. 100% loss can occur. See https://polymarketexchange.com/files/legal/Polymarket%20US%20Rulebook%20(2026.09.30).pdf for more information. The Polymarket US App serves as an independent software provider and affiliate of Polymarket US and Polymarket Clearing, the CFTC-regulated exchange and clearing organization.
Sources: Underdog: Eligible States for Prediction Picks · Underdog: Prediction Picks Overview · Underdog Exchange legal center (UDX Fee Schedule) · Underdog Predict legal center (UDM Fee Schedule) · Underdog Predict disclosures