Polymarket crypto fee calculator

Enter the executable share price and size to estimate the current Polymarket crypto platform fee, total cost and hold-to-resolution break-even win rate.

Trade setup

Price the full entry.

Updates instantly

Executable priceUse the ask you can fill

Displayed probability can differ from the executable order-book price.

Position sizeWinning shares pay $1

shares

Order roleHow the order fills

TakerCrosses the book MakerRests on the book

A crossing limit order still executes as a taker.

How the fee is calculated

fee = shares × 0.07 × price × (1 − price)

Showing a 100-share taker entry at 50¢.

Your break-even win rate 51.75%

You need your probability estimate above this level before slippage and other costs.

Entry composition$51.75 total

Share valuePlatform fee

Share value: $50.00
Platform fee: $1.75000
Total entry cost: $51.75
Profit if it wins: $48.25
Return on a win: 93.24%

Want these checks on every entry?PolyPilot checks price, fees, liquidity and exposure automatically.

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Estimate only. Excludes additional slippage, exit trades, builder or third-party fees, rebates, partial fills, rounding differences and market-specific fee changes.

What the result means

A binary share that resolves correctly pays $1. If you buy as a taker, your economic entry cost is the executable price plus the platform fee. At 50¢, the current 7% crypto fee parameter adds 1.75¢ per share, so the hold-to-resolution win rate needed to break even becomes 51.75%, not 50%.

Use the executable price

Polymarket explains that the displayed probability is normally the order-book midpoint. A midpoint is not necessarily available to buy. Use the actual ask for a buy or the actual bid for a sale when evaluating whether an apparent edge survives execution.

Verify every market before trading

Polymarket says fees are determined per market at match time. The current documented crypto taker rate is 0.07 and the maker platform rate is zero, but the market's live fee schedule is authoritative. This calculator is dated and intentionally links to the official fee documentation →

Why PolyPilot checks the book

PolyPilot compares its probability estimate with the price and size that can actually fill, then applies fee, liquidity, spread and account controls. A theoretical signal is not enough if execution removes the edge.

FAQ

What is the Polymarket crypto taker-fee formula?

Polymarket currently documents the platform fee as shares multiplied by 0.07 multiplied by price multiplied by one minus price for fee-enabled crypto markets. Always verify the live market fee schedule before trading.

Why is break-even probability higher than the entry price?

A winning share pays $1 at resolution, but a taker pays the entry price plus the platform fee. The win rate needed to break even is therefore total entry cost divided by the number of shares, before any other costs or rebates.

Do makers pay the platform trading fee?

Polymarket currently documents the platform maker fee as zero. A limit order that crosses the book can execute as a taker, so maker treatment is not guaranteed merely because an order was submitted as a limit order.

Does this calculator predict whether a trade will win?

No. It only calculates cost and break-even math from the values entered. It does not estimate outcome probability, liquidity, slippage, fill probability or trading performance.

Price the trade before you take it.

Use the calculator for the math. Use PolyPilot when you want the executable-price and account checks running around the clock.

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