Polymarket Fee Calculator: See the Fee Before You Trade
By WhaleSays Editorial · Rates checked · 4 min read
Polymarket charges takers a fee of shares × fee rate × price × (1 − price) and charges makers nothing. On $100 at 50¢ in a sports market that is $2.50, or 2.5% of the trade. Enter your own trade below to see the fee, the total cost and the price you need to break even.
WhaleSays is independent and not affiliated with Polymarket. Our Polymarket sign-up links are affiliate links: we may receive a share of the trading fees you pay, and you pay nothing extra. See the affiliate disclosure. This page is information, not financial or legal advice.
Calculate the fee on your trade
You know
The value of the shares. The fee is added on top.
How you buy
Start from a live market
Live prices as of 18:34 UTC, 3 Nov 2026; they move all the time. We guess the market type from the market's tags, so check the fee on the market itself.
Fee when you buy now
$0.68
That is 0.68% of the $100 trade, so you pay $100.68 in all for 115.61 shares at 86.5¢.
If you are wrong, you lose the $100 you put in, plus the $0.68 fee.
- Total cost
- $100.68
- Fee rate for this market type
- 0.05
- Fee as a share of your best-case profit
- 4.3%
- Break-even win rate
- 87.08%
- Break-even if you sell at once
- 87.6¢
- Break-even with a limit sell
- 87.1¢
Amount plus fee
Fee = shares × 0.05 × price × (1 − price)
If you win you make $14.93 after the fee
Hold to the result: be right more often than this. The price alone says 86.5%.
Sell price (paying the fee again) that gets your total cost back
Sell price that gets your cost back with a resting order
These numbers are for Galatasaray SK to win in Galatasaray SK vs. VfB Stuttgart.
Trade this on Polymarket (affiliate link)Fee rates checked 25 October 2026 against Polymarket's fee page. Polymarket can change them at any time. The fee is rounded to the cent here; Polymarket rounds to five decimal places. Rebates for frequent traders are not included.
What this trade would cost at other prices
Taker fee for the same $100 amount in a sports market. Makers pay $0. Your own price is highlighted.
| Price | Fee on $100 | Fee as % of trade | Fee on 100 shares |
|---|---|---|---|
| 5¢ | $4.75 | 4.75% | $0.24 |
| 10¢ | $4.50 | 4.5% | $0.45 |
| 20¢ | $4.00 | 4% | $0.80 |
| 30¢ | $3.50 | 3.5% | $1.05 |
| 40¢ | $3.00 | 3% | $1.20 |
| 50¢ | $2.50 | 2.5% | $1.25 |
| 60¢ | $2.00 | 2% | $1.20 |
| 70¢ | $1.50 | 1.5% | $1.05 |
| 80¢ | $1.00 | 1% | $0.80 |
| 86.5¢ | $0.68 | 0.68% | $0.58 |
| 90¢ | $0.50 | 0.5% | $0.45 |
| 95¢ | $0.25 | 0.25% | $0.24 |
A share price is not a promise. If you buy and the outcome does not happen, you lose what you paid, plus any fee. Only trade money you can afford to lose; see trading responsibly. These tools do maths on prices you enter. They are not financial advice and not a prediction.
Ready to see the real fee?
Polymarket shows the fee on the market before you trade. Opening an account takes a few minutes, and WhaleSays is independent: signing up through our link costs you nothing extra.
Fee rates by market type
Each market type has its own taker fee rate. This is what a buy-now trade of $100 costs at 50¢, where the fee is highest, and at 90¢. Combo markets, which bundle several legs, use a rate of 0.05.
| Market type | Fee rate | Fee on $100 at 50¢ | Fee on $100 at 90¢ | Maker fee |
|---|---|---|---|---|
| Sports | 0.05 | $2.50 | $0.50 | $0 |
| Politics | 0.04 | $2.00 | $0.40 | $0 |
| Crypto | 0.07 | $3.50 | $0.70 | $0 |
| Finance | 0.04 | $2.00 | $0.40 | $0 |
| Economics | 0.05 | $2.50 | $0.50 | $0 |
| Culture | 0.05 | $2.50 | $0.50 | $0 |
| Tech | 0.04 | $2.00 | $0.40 | $0 |
| Weather | 0.05 | $2.50 | $0.50 | $0 |
| Mentions | 0.04 | $2.00 | $0.40 | $0 |
| Other | 0.05 | $2.50 | $0.50 | $0 |
| Geopolitics (fee-free) | 0 | $0.00 | $0.00 | $0 |
Rates from Polymarket's fee page, checked 25 October 2026. They can change at any time.
How to read the result
- Fee. What a taker pays on top of the amount. We add it to the amount you enter, so the total cost is the amount plus the fee.
- Fee as a share of your best-case profit. A small percentage of the trade can be a bigger bite out of a small possible gain. At 90¢ you can make at most 10¢ a share, and the fee is a larger part of that.
- Break-even win rate. The total cost divided by what the shares pay. Because of the fee it is a little above the price: at 40¢ in a sports market it is 41.2%. Over many trades you need to be right more often than that to come out ahead.
- Break-even sell price. If you plan to sell before the result, this is the price at which the sale gets your cost back. Selling at once is a taker trade, so it pays the fee again.
Three worked examples
- Sports, $100 at 50¢. That is 200 shares. Fee: 200 × 0.05 × 0.5 × 0.5 = $2.50. Total cost $102.50. If you win, the shares pay $200 and your profit is $97.50. If you lose, you lose the $102.50.
- Politics, $50 at 90¢. That is 55.56 shares. Fee: $0.20, which is 0.4% of the trade but 3.6% of the $5.56 you can make at most.
- Crypto, $200 at 30¢. That is 666.67 shares. Fee: $9.80, or 4.9% of the trade. Crypto has the highest rate (0.07), so a limit order saves the most here.
How to pay less: maker orders
Only takers pay. A taker buys the moment they click, filling against orders already on the book. A maker places a limit order at a price and waits for someone to trade with it, and pays no fee. The cost of waiting is that the order may not fill, and the price may move away from you. If you are in no hurry, a limit order is worth considering; our first-trade guide explains when each order type makes sense. Check where Polymarket is open before you deposit.
Frequently asked questions
- How do I calculate the Polymarket fee?
- Multiply the number of shares by the fee rate for the market type, then by the price and by (1 − price): fee = shares × rate × price × (1 − price). For 200 sports shares at 50¢ that is 200 × 0.05 × 0.5 × 0.5 = $2.50. If you only know the dollar amount, shares are the amount divided by the price.
- What is the Polymarket fee on a $100 trade?
- It depends on the price and the market type. A $100 buy-now trade at 50¢ costs $2.50 in a sports market (rate 0.05), $2.00 in politics (0.04) and $3.50 in crypto (0.07). At 90¢ the same trade costs $0.50 in sports. Geopolitics markets and limit orders that wait to be filled cost $0.
- Do makers pay Polymarket fees?
- No. Polymarket's documentation says makers, whose resting limit orders are matched by someone else, are never charged fees. The trade-off is that a limit order may not fill. Our fees guide explains the difference between maker and taker orders.
- Does Polymarket charge to deposit or withdraw?
- Polymarket says it charges no fee to deposit or withdraw USDC. Intermediaries such as a card provider may charge their own fees, and a withdrawal that swaps tokens can lose a small amount to the swap. This calculator covers trading fees only.
- Can Polymarket change its fees?
- Yes. Polymarket sets fee parameters per market and can change them at any time, so check the fee on the market before you trade. We last compared the rates in this calculator with Polymarket's fee page on 25 October 2026.