Polymarket fees explained

Short answer: Since October 2026, Polymarket US charges a price-based taker fee (highest near 50¢, about $1.74 per 100 contracts). Orders that rest on the book pay no fee; rebates on them are limited to very high-volume traders from October 19, 2026. Check the displayed spread, payment-method charges and market liquidity before trading.

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The full cost stack

1. Platform fee: Since October 2026, Polymarket US charges a price-based taker fee (highest near 50¢, about $1.74 per 100 contracts). Orders that rest on the book pay no fee; rebates on them are limited to very high-volume traders from October 19, 2026.
2. Spread: The gap between the best buy and sell prices is a real execution cost.
3. Funding: Any payment-method charge is shown in the app and can vary by method.
4. Liquidity: Larger orders can move the displayed price in thinner markets.
5. Taxes: Keep records and get professional advice for your filing situation.

When Polymarket compares well with Kalshi

On thinner markets, a wider spread or price impact can outweigh that headline. Compare the exact market, displayed quote and contract rules before deciding.

Cost comparison — Polymarket US vs Kalshi

The most reliable comparison is the quote shown immediately before you submit the same type of trade on each platform.

Florida angle

Polymarket US is available to eligible Florida users through its app. Review the current terms and offer eligibility before depositing; Florida has no state individual income tax, but federal reporting may still apply.

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Certain limitations apply. The offer is available to new users only, subject to the terms and conditions at kalshi.com/tc/500. 18+ only. Restrictions and eligibility requirements apply. Event contract trading involves significant risk and is not appropriate for everyone. Please carefully consider if it is appropriate for you in light of your personal financial circumstances. Kalshi products are not available in all jurisdictions. See kalshi.com/regulatory for more information.

Sources

• › Polymarket Learn — how markets and resolution work (opens in a new tab)
• › Polymarket developer documentation (opens in a new tab)
• › IRS — About Form 1099-B (opens in a new tab)
• › U.S. Commodity Futures Trading Commission (CFTC) (opens in a new tab)

Frequently asked questions

Does Polymarket charge trading fees?

Since October 2026, Polymarket US charges a price-based taker fee (highest near 50¢, about $1.74 per 100 contracts). Orders that rest on the book pay no fee; rebates on them are limited to very high-volume traders from October 19, 2026. Your effective cost can still include the bid-ask spread and any payment-processing charges shown before you trade.

Are there fees to deposit on Polymarket US?

Check the app's current funding screen for any payment-method charge. Polymarket US uses dollar funding; never assume a third-party fee is included in the platform fee.

Are Polymarket withdrawals free?

Review the app's withdrawal screen before confirming. The platform fee and any payment-rail charge are separate line items.

What about the bid-ask spread?

The spread is the difference between the best available buy and sell prices. It can be wider in thin markets, so use limit orders and check the book before sizing a position.

How do costs compare to Kalshi?

Polymarket US advertises no platform fee, while Kalshi charges a disclosed contract fee. Compare the displayed total cost and spread for the exact market rather than relying on a general estimate.

Is Polymarket US available in Florida?

The Polymarket US app is offered in Florida, but eligibility and offer terms can change. Confirm the current terms in the app before depositing.

Does Florida charge state income tax on gains?

Florida has no state individual income tax, but federal reporting may still apply. Keep your own transaction records and ask a tax professional about your situation.

What's the real cost of a $500 trade?

It depends on the market price, spread and funding method. Review the app's quoted costs before submitting; a larger position can also face price impact.