Polymarket Fees: What It Actually Costs To Trade
Search "Polymarket fees" and you are hoping for a number. The number traders actually miss is not the posted fee, though. What you pay on Polymarket lives in three places: a trading fee that exists on some markets and not others, a bid-ask spread that never appears on any statement, and the rails your money rides on the way in and out. The rates move constantly; where the costs hide does not. By the end of this page you will know all three, plus the single habit that shrinks two of them at once.
The Quick Answer
Polymarket charges a taker fee on most market categories, calculated from a formula that peaks when a contract trades near 50 cents, and under the current schedule resting orders pay nothing. On the international venue, Polymarket itself does not charge to move USDC in or out, but the on-ramps and off-ramps in between charge their own tolls, and in a thin market the spread you cross to get filled instantly can cost more than the fee itself. The full breakdown of each cost, how the structure compares against a US exchange like Kalshi, and where the schedule itself lives, is below.
One Question, Two Venues, Two Cost Structures
Before any cost makes sense, you need one piece of context: "Polymarket" is one brand running two different machines, and they do not charge you the same way. We walk through the split in full in how Polymarket works, but the short version matters here.
The original exchange at polymarket.com is the international, crypto-native venue. Balances are held in a dollar-pegged stablecoin, trades settle on a blockchain, and for US residents the site is view-only. Its costs are the ones this page mostly describes, because they are the ones the platform publishes openly.
Polymarket US is the regulated American venue: a CFTC-regulated exchange and clearing organization, traded through the Polymarket App, with deposits in actual dollars. Treat everything below as the shape of Polymarket's costs, and confirm the current schedule for the venue you are actually allowed to trade on before you fund an account. Across venues, the cost question stays the same: the fee formula, the spread, and the funding route.
The Trading Fee: A Curve That Charges For Uncertainty
For years the folk answer to "does Polymarket have fees" was no, and that answer has expired. The live fee schedule now lists a taker fee on most market categories, and the way it is calculated tells you more than the rate itself:
fee = shares × rate × price × (1 − price)
The price × (1 − price) term is uncertainty itself. It is largest when a contract trades at 50 cents, where the market is a coin flip, and it shrinks toward zero as the price approaches either extreme. A trade at 30 cents costs the same fee as a trade at 70 cents. The formula produces its highest fee when the outcome is least certain, and almost nothing when the market has made up its mind.
The rate in that formula varies by market category, sports and crypto and politics each carrying their own, and geopolitical and world-events markets trade with no fee at all. I am deliberately not reprinting the rate table here. Those coefficients are exactly the kind of number that goes stale on a page like this one, and the schedule linked above is the only version that counts on the day you trade.
Two structural facts are worth more than the table anyway:
- Only Takers Pay. Under the current schedule an order that rests on the book and waits to be filled is charged nothing, and part of the fee revenue is recycled into rebates for the traders who provide that resting liquidity. Takers can earn a tiered portion of their fees back through a rebate program of their own; the schedule page carries the current terms for both.
- The Fee Applies At Match Time, Per Trade. Trading in and out of a position creates two fee events; buying once and holding to settlement creates only the entry-side fee.
Hold that thought about resting orders; it is about to pay for itself twice.
The Spread: The Cost That Never Shows Up On A Statement
Here is the cost most Polymarket fee searches never ask about, and in a thin market it is the biggest one on the page.
An exchange has no bookmaker setting one price. It has an order book: bids on one side, offers on the other, and a gap in between. If you want in right now, you cross that gap. How wide the gap runs is not random. The marquee questions, the election headliners and the big sports markets, trade tight because half the internet is quoting them; the long-dated and niche questions sit wide because nobody has to quote them at all. And the gap is widest at the worst moment: when news lands, quotes get pulled first and repriced second, so the book opens up right when you most want to cross it. The habit worth building on any event exchange: read the gap before you read the price, because the gap is what your opinion will cost to express.
One mechanic before the math, since every number below leans on it: a share settles at $1 if the outcome happens and $0 if it does not, so a price between 1 and 99 cents is simultaneously your cost and the market's working probability.
A Worked Example: Crossing The Spread Vs Resting An Order
The numbers below are illustrative, chosen to make the mechanics concrete. Real books move.
Say a contract is bid at 58 cents and offered at 62, a market pricing the outcome at roughly a 60% chance. The honest midpoint of that market is 60 cents. Buy 100 shares instantly and you pay $62.00 for a position the market itself values at $60.00, a $2.00 toll that works out to 3.3% of the position before any trading fee is added. Now add the fee: run the schedule's formula on that same fill at the rate listed for sports-class markets and the taker charge comes out a little over a dollar. The spread toll runs not quite double the fee here, and in a penny-wide book the ranking flips and the fee becomes the bigger line. Neither cost is fixed; both are set by the market you chose.
Rest a bid at 60 cents instead and, if it fills, the $2.00 stays in your pocket, and under the current schedule the taker fee disappears with it. Same contract, same size, same opinion; the entry choice alone moved your cost twice.
That resting-order habit is the biggest cost lever on this page. The catch is real, though. A resting order might never fill, and watching a price run away from the order you were too clever to cross is its own kind of expensive. In a deep market the gap might be a cent and none of this matters much. In a thin one the spread can be wide enough to swallow whatever opinion brought you there, which is the same reason the same contract can trade at different prices on different exchanges without anyone getting rich off the gap.
The takeaway: resting the order cut the spread cost and zeroed the fee line at once. The crossed version of the identical trade paid twice.
Funding Friction: The Cost Before Your First Trade
The third cost arrives before you have placed a single order, and it is the one the fee schedule cannot show you, because it is mostly not Polymarket charging it.
On the international exchange, your balance is a stablecoin. Polymarket itself does not charge to deposit or withdraw it, and its own schedule page names the catch: intermediaries like Coinbase or MoonPay, the rails that turn your dollars into that stablecoin and back, may charge their own fees. Those intermediaries price their own legs of the trip, card routes typically costing more than bank-style transfers, and a conversion on the way in plus a conversion on the way out is two tolls, not one. None of it appears on any Polymarket statement, which is exactly why people forget to count it.
On Polymarket US, deposits are dollars moving through approved financial intermediaries under federal derivatives regulation, closer to funding a brokerage than funding a wallet. The friction there is less about conversion and more about verification and timing; confirm what any given method costs on that venue before you move money.
Either way, the practical lesson is the same one we keep landing on in venue reviews like our ProphetX review: the cheapest funding route is usually the boring one, and the cost of moving money matters more the smaller your bankroll is. A $10 toll on a $500 deposit is 2% of your entire trading stake, gone before the first contract, a bigger haircut than the fee formula would charge on dozens of coin-flip trades.
Count the round trip, not the leg. Polymarket withdrawal fees follow the same logic as deposits on the international venue: the platform itself charges nothing to move the stablecoin, and any cost comes from the intermediary or conversion path. Price the full loop, dollars to balance and back to dollars, before deciding whether a venue is cheap for your bankroll size.
Polymarket Vs A US Exchange: Where Each Structure Bites
Now the comparison that makes the structure useful, because the natural alternative for a US reader is Kalshi, and the two venues put their costs in different places. We broke down how Kalshi's fees work in the mirror image of this piece, and the side-by-side is the useful part:
| Where The Cost Lives | Polymarket (international venue) | Kalshi |
|---|---|---|
| Trading Fee | Taker fee on most categories; resting orders pay nothing | Taker fee on standard trades; some markets also carry a smaller maker fee |
| Fee Shape | Formula peaking at 50 cents | Formula peaking at 50 cents |
| Spread | Real cost, set by the order book | Real cost, set by the order book |
| Money In And Out | No platform charge for the stablecoin itself; intermediaries and conversions charge their own | Bank transfers free; card deposits carry a fee |
| Currency | Stablecoin | US dollars |
Disclosure, before you weigh this table: OddsShopper is a Polymarket partner and has no commercial relationship with Kalshi, so our financial incentive on this page points toward Polymarket. Judge the comparison with that in mind.
The row that should stop you is the fee shape, because it is the callback to that price × (1 − price) term. Both exchanges charge the most at the coin flip and the least at the extremes. No coincidence there; it is the economics of an event contract, where a 50-cent market is where the exchange's matching service is worth the most. Once you have internalized that one curve, you can read any event exchange's fee schedule at a glance, including whatever either platform publishes next.
The differences sit at the edges. Polymarket's structure is friendlier to patient traders, since resting orders pay nothing across the board, while Kalshi applies a smaller maker fee on some markets. Kalshi's funding is friendlier to US bank accounts, dollars in and dollars out with no conversion leg. Which structure costs you less is not a property of the venue. It is a property of how you trade: an impatient taker crossing wide spreads pays dearly on both, and a patient trader on deep markets pays almost nothing on either. For the platform comparison beyond fees, see Kalshi vs Polymarket.
The Cost That Dwarfs All Three
Everything above is measured in cents. The cost that ends accounts is measured in dollars, and no schedule prints it.
Selling an unlikely outcome, or holding its heavy-favorite side, collects a small premium and risks most of a dollar. Sell a 3-cent long shot and you pocket 3 cents against a 97-cent loss if the unlikely thing lands; at that shape, one loss erases the premiums from roughly thirty or forty wins. A trader can be right twenty times straight and hand it all back in an afternoon. That arithmetic, not the hit rate, is why position sizing is the entire game, and we walk through it properly in when you sell a long shot, one loss costs many wins. No fee comparison matters to a trader who gets this part wrong.
We say that from experience rather than theory: Stokastic trades event-contract markets and holds positions in them, and we keep an open research log of that trading on our Kalshi weather markets hub, where settled positions are publicly graded against the market's final settlement, losses included. An exchange being cheap is not the same thing as a trade being good.
Trying Polymarket US
If the structure reads fair to you and you want to see a live book for yourself, our link installs the Polymarket App and carries offer code OS4, currently: Deposit $10, get a $20 trading bonus. Our Polymarket promo code guide walks through the offer and its conditions in full. A bonus is a trading credit with the platform's own conditions attached, not money you simply keep, and it does not change a single number in the cost structure above.
OddsShopper is a Polymarket partner and may earn a commission if you sign up through our links. We have no affiliate or commercial relationship with Kalshi, so on any page comparing the two, our financial incentive points toward Polymarket; judge the comparison above with that in mind. 18+ Only. Restrictions and eligibility requirements apply. Not available in all jurisdictions. Trading is risky. 100% loss can occur. See polymarket.com/tos 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.
Eligibility is its own homework. US residents trade only through Polymarket US, the international site is view-only from the US, and availability is state-specific and still shifting, a map we keep current in whether Polymarket is legal in the US and prediction-market legality state by state.
Polymarket Fees FAQ
Does Polymarket have fees? Yes, on most market categories. Polymarket trading fees are a taker fee calculated from the share price, largest near 50 cents and smallest at the extremes, while geopolitical and world-events markets carry no fee at all. Resting orders pay nothing under the current schedule. The live schedule is the only current source for the rates.
What are Polymarket's withdrawal fees? The international platform does not charge to withdraw its stablecoin, but the intermediary converting it back to dollars in your bank account may charge its own fee. For Polymarket US, confirm current withdrawal methods and costs on that venue before you fund an account.
Is Polymarket cheaper than Kalshi? The structures differ more than the totals do. Both charge a taker fee that peaks at the coin flip; Polymarket charges resting orders nothing while Kalshi applies a smaller maker fee on some markets, and Kalshi's dollar banking rails avoid the conversion friction of crypto funding. For a patient trader on liquid markets, both venues are cheap; for an impatient one, the spread costs more than the fee schedule at either.
What is the biggest cost of trading on Polymarket? In a thin market, the spread: crossing a truly wide bid-ask gap can cost multiples of the trading fee on the same order, and it never appears as a line item. In a deep, penny-wide market the fee is the bigger line. The costliest mistake of all is not a fee at all: sizing a short-priced position badly, where one loss can erase dozens of wins.
Does Polymarket charge deposit fees? Not for moving its stablecoin on the international venue, but the on-ramp you use to turn dollars into that stablecoin sets its own price, and card routes typically cost more than bank-style routes. Polymarket US takes dollar deposits through approved intermediaries, with costs disclosed in the app.
So, what does it cost to trade on Polymarket? A fee that scales with uncertainty and vanishes if you rest your orders, a spread that charges you for crossing it, and funding rails that toll the money on the way in and out. Read those three as one bill and the venue is cheap when the way you trade matches the way it charges: orders that rest instead of cross, positions held to settlement, money moved on the boring rails, markets deep enough to fill you. That is the same discipline as shopping a betting line instead of taking the first price, and if you want to watch that probability-first habit applied to games every day, our free expert picks are a no-cost place to see it.
Event contracts on any venue can lose their full value. Kalshi and Polymarket US contracts are CFTC-regulated derivatives, not sportsbook wagers; the international Polymarket exchange operates outside US regulation and is not available to US residents. 18+, where each platform operates. Stokastic trades event-contract markets and holds positions in them; our public log of that trading is open research into a strategy we have not proven. Nothing on this page is trading advice, and nothing here is a pick or a recommendation.
