Polymarket vs Robinhood

Polymarket vs Robinhood: the key differences

Polymarket US is an exchange and Robinhood is a broker. Polymarket US is the CFTC-regulated US exchange of Polymarket: you trade directly on QCX LLC, a designated contract market, and trades clear through its own clearinghouse. Robinhood Derivatives, LLC, a CFTC-registered futures commission merchant, routes your orders to Kalshi, Interactive Brokers’ ForecastEx, its Rothera joint venture and, for some football contracts since September 8, 2026, Crypto.com’s exchange. Polymarket US isn’t on that list, so you can’t trade its markets through Robinhood.

Robinhood ranks #2 and Polymarket US #4 in our ranking of the best US prediction markets. The international polymarket.com is close-only for US users, so Polymarket US is the version compared here.

As of September 30, 2026, the main differences are:

• Fees: Polymarket US takers pay at most 1.74¢ per contract and makers earn a rebate. Robinhood’s commission of up to 1¢ comes on top of an exchange fee of up to 1¢.
• Liquidity: Robinhood routes orders to Kalshi, the largest US prediction market, and its customers traded a record 13.6 billion contracts in the second quarter of 2026. Polymarket US traded about $8.5 billion in September 2026.
• Where you trade: Polymarket US works on the web and iOS. Robinhood trading is app-only, on iOS and Android.
• Funding: Polymarket US takes debit card, ACH and wire, with no fees. Robinhood uses the cash in your brokerage account, and event contracts need settled cash.
• Interest: neither lists any interest on event-contract positions.

Fees

Polymarket US is the cheaper of the two at every price in the table below. Its taker fee is 0.0695 × contracts × price × (1 − price), rounded to the nearest cent, so it peaks at 1.74¢ per contract at 50¢. Robinhood charges a commission of 10% × price × (1 − price) per contract, or 5% with Robinhood Gold, capped at 1¢, plus an exchange fee of up to 1¢ per contract; Kalshi-listed contracts cost 1¢ per contract per side.

The 90¢ Robinhood figures come from Robinhood’s own example ($91.90 in total for 100 Yes contracts, or $91.45 with Gold); the rest are our calculations from the published formulas.

Makers widen the gap. Polymarket US pays a rebate of 0.0125 × the same formula, or $0.31 on 100 contracts at 50¢, while Robinhood charges its commission and exchange fee on every trade. Heavy Polymarket US traders also get 10% to 50% of their taker fees back each week, depending on the previous month’s volume, although its combos carry an extra taker charge.

Moving money is cheaper on Polymarket US, which charges no deposit or withdrawal fees. Robinhood’s ACH transfers are free, but instant withdrawals cost 1.75% (minimum $1, maximum $150) and outgoing wires $25. Our prediction market fees guide compares all five platforms we rank.

Liquidity

Robinhood gives you the deeper pool to trade against, because it routes orders to Kalshi, which handled about $53 billion of volume in September 2026 through the 29th, according to The Block, as well as to three other exchanges. Robinhood’s customers traded a record 13.6 billion contracts in the second quarter of 2026, more than 10 times as many as a year earlier, and event contracts brought in $156 million of revenue that quarter, according to its SEC filing.

Polymarket US traded about $8.5 billion in September 2026, according to DeFi Rate data. It’s also much newer: the app opened to invited users in December 2025 and dropped its iOS waitlist on May 12, 2026.

Availability and legality

Both are CFTC-regulated, but as of September 30, 2026, Polymarket US is blocked outright in one state, while Robinhood has stopped sports contracts in four.

Some third-party guides list up to eight more states where Polymarket US is unavailable, so check the app. New York’s attorney general sued Polymarket on September 24, 2026, and Polymarket countersued. Robinhood has asked the Supreme Court to review its Nevada loss at the Ninth Circuit (No. 26-338), and Connecticut and Missouri issued orders in September 2026 telling both platforms, among others, to stop offering sports contracts.

On track record, Robinhood Markets is a public company that reports event-contract volumes and revenue in its SEC filings, and Robinhood Derivatives is a clearing member of the Kalshi, ForecastEx and Rothera clearinghouses. Polymarket’s US exchange was designated in July 2025, and in January 2022 the CFTC ordered Blockratize, the company behind Polymarket, to pay $1.4 million and wind down markets it had offered without registering. Our guide to whether prediction markets are legal explains the court fights.

A CFTC registration doesn’t override a court order in your state. Trade only what each app offers where you are, and don’t use a VPN to get around a block.

Which should you choose?

Choose Polymarket US if low trading costs matter most, if you post limit orders and want a rebate, if you want to trade on the web, or if you trade enough volume to get 10% to 50% of your taker fees back.

Choose Robinhood if you already invest there and want event contracts next to your stocks and crypto, if you want access to Kalshi’s liquidity and three other exchanges in one app, or if you use Android, where Polymarket US’s availability is unclear.

Using both can make sense: if you already have a Robinhood account, adding Polymarket US gives you a cheaper place to post limit orders and a second set of prices to compare, though it needs its own sign-up and deposit. Robinhood lets you hide sports markets and self-exclude from event contracts; Polymarket US’s tools couldn’t be confirmed, so see our responsible gambling guide before you start.

Read our full Polymarket review and Robinhood review, or see all five platforms in our ranking of US prediction markets.