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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →Neither Kalshi nor Polymarket is universally cheaper or available to every reader. Your cost depends on the specific market, whether your order takes or adds liquidity, contract price and quantity, and how you fund and withdraw. Compare the same event and trade setup, then check the current fee schedule and your state or country’s eligibility before depositing.
Kalshi vs. Polymarket fees: how the charges work
Both platforms calculate trading fees using the number of contracts or shares and the contract price; a headline rate alone does not show what a trade will cost. The schedules below are dated July 2026 and can change. They describe platform trading fees, not the full cost of entering and exiting a position.
Kalshi’s fee schedule
Kalshi’s schedule effective July 7, 2026 gives the general taker fee as round up(M × 0.07 × C × P × (1−P)), where M is the market’s multiplier, C is the number of contracts, and P is the contract price. The default multiplier is 1, but individual series may specify a different multiplier. The schedule’s general maker formula uses 0.0175, with a default maker multiplier of 0 unless otherwise indicated. These are formula coefficients, not flat percentages of trade value. Kalshi’s official fee schedule lists a $1.75 fee for 100 contracts at $0.50 on the general taker schedule.
Under the schedule, fees generally apply when an order immediately matches against the book; a resting order is generally not charged unless a maker fee applies to that series. Kalshi’s schedule states, “There is no settlement fee” and “There is no membership fee.” Check the multiplier and fee treatment for the specific series rather than assuming the general formula applies unchanged.
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Polymarket’s category-based fees
Polymarket’s July 10, 2026 help page gives the taker fee formula as C × feeRate × p × (1−p). It says makers are not charged under the described schedule; takers pay rates that vary by category:
| Polymarket category | Taker fee rate |
|---|---|
| Crypto | 0.07 |
| Sports | 0.05 |
| Finance | 0.04 |
| Politics | 0.04 |
| Economics | 0.05 |
| Culture | 0.05 |
| Weather | 0.05 |
| Other/general | 0.05 |
| Mentions | 0.04 |
| Tech | 0.04 |
| Geopolitics/world events | 0 |
These are category fee rates used in the formula, not flat percentages applied to every trade’s value. The fee changes with price and number of shares, so confirm the category and live terms for the market you intend to trade. Polymarket’s fee help page says Polymarket itself charges no fee to deposit or withdraw USDC, but third-party intermediaries may charge.
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Which prediction market has lower fees?
There is no reliable platform-wide answer. For a fair comparison, choose the same event or the closest equivalent, use the same side, price, quantity, and order behavior, and calculate each platform’s trading fee using that market’s current rules. Then account for the bid–ask spread, slippage, funding conversion, intermediary or network charges, and withdrawal costs. The cited schedules do not establish an all-in cost for a hypothetical cross-platform trade.
Kalshi vs. Polymarket funding and withdrawals
The available funding routes differ, and a no-fee deposit does not mean a transfer or trade has no other costs. Availability of a route can depend on account location and the payment provider.
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| Funding or withdrawal detail | Kalshi | Polymarket |
|---|---|---|
| Bank transfer deposits | US ACH deposits have a $10 minimum and no Kalshi deposit fee. Full settlement typically occurs within five business days; some customers may receive partial immediate credit, with the amount shown before submission. Kalshi Help Center | The cited fee page addresses USDC deposits, not eligibility for every bank or on-ramp. Polymarket Help Center |
| Other deposit routes | ACH is unavailable to international accounts. Kalshi names debit card, crypto, and wire as alternatives. Its schedule says card deposits may cost up to 2%; crypto processor fees and wire costs may apply. Funding options · Fee schedule | Polymarket says it charges no fee to deposit USDC, but third parties such as Coinbase or MoonPay may charge. The statement does not establish that every user can use each on-ramp or that conversion and blockchain costs are always zero. Fee help page |
| Withdrawals | The July 2026 schedule lists no Kalshi fee for ACH withdrawals. Kalshi’s August help page says bank withdrawals are for US users and typically take a few business days. International accounts cannot withdraw by bank transfer; debit card or crypto may be available. Crypto provider or bank wire fees may apply. Fee schedule · Withdrawal help | Polymarket says it charges no fee to withdraw USDC; intermediaries may charge. Fee help page |
Markets: compare the contracts, not just the titles
The platforms’ published category information does not establish that the same event is currently listed on both, or that similarly named contracts resolve the same way. Kalshi’s policy excludes specified subjects, including war, death, nuclear war, assassination, and kidnapping. Polymarket’s fee categories include crypto, sports, finance, politics, economics, culture, weather, general, mentions, technology, and geopolitics. Kalshi’s market policy · Polymarket’s fee categories
Before treating two contracts as substitutes, check these details on each listing:
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- Question and outcome wording: Identify precisely what must happen for the contract to resolve “Yes” or “No.”
- Resolution source and rules: Confirm which source determines the outcome and how edge cases are handled.
- Settlement timing and payout: Check when resolution occurs and what the winning position pays under that contract’s terms.
- Liquidity and spread: Review the current order book and the gap between available buy and sell prices; a lower fee can be offset by a wider spread or slippage.
- Order and fee treatment: Confirm whether your order takes or adds liquidity, and check the market’s specific fee category or multiplier.
Is Kalshi available in my state or country?
Kalshi’s signup help page, dated March 10, 2026, says applicants must be at least 18 and may need document verification. It describes international access but notes that some jurisdictions are restricted. Kalshi directs users to its Member Agreement and says each person is responsible for confirming that access and use are lawful where they live. “International access” does not mean universal access. Kalshi signup and eligibility help
Check the current onboarding flow and terms for your exact state or country before funding. Eligibility can differ by location and may change.
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Can I use Polymarket in the US?
The cited Polymarket materials establish category fees and a US-facing App Store listing, but they do not establish a complete, current state-by-state or country-by-country eligibility matrix for Polymarket’s products. An app listing or a website that loads is not proof that you can open an account or trade from your location. Check the official product’s signup flow and current terms for your exact state or country before depositing. Polymarket’s US App Store listing · Polymarket Help Center
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
