Polymarket Profit Calculator
How this calculator works
Each Polymarket share trades between 1¢ and 99¢ and redeems for exactly $1.00 if its outcome resolves true. Your shares = amount ÷ entry price, so 100 USDC at 63¢ buys ≈158.7 shares. Selling later at a higher price — or holding to a winning resolution where each share pays $1.00 — is your gross return.
The only cost beyond the spread is the taker fee, charged at match time as coefficient × price × (1 − price). Makers pay none and redemption at resolution is free, so a trade held to the end is charged only its entry fee. Break-even sits above your entry by exactly that fee; net profit is payout − cost − fee, and ROI is net ÷ cost.
Estimate only. The taker fee is charged at match time; makers pay none, and redemption at resolution is free.
The math
- Shares
- Amount ÷ Entry price
- Payout
- Shares × $1.00
- Fee
- Shares × rate × p × (1 − p)
- Net P&L
- Payout − Cost − Fee
- ROI
- Net P&L ÷ Cost
Other calculators
The exact taker fee by price, size, and category.
Daily, monthly, and yearly Holding Rewards (~3.25% APR).
What you earn back as a maker — 20–25% of the taker fee.
Your tier and the 3–50% rebate on taker fees by 30-day volume.
Frequently asked
Does Polymarket charge fees, and how much?
Yes — a taker fee, charged at match time as coefficient × price × (1 − price). The coefficient is set by the market category (0.07 crypto, 0.05 economics/culture/weather, 0.04 politics/finance/tech, 0.03 sports, 0 geopolitics), and it bites hardest at 50¢ where price × (1 − price) = 0.25. Makers pay no fee. Polymarket fee docs
Do I pay a fee if I hold to resolution?
No exit fee. Redeeming winning shares at resolution is free, so a position you hold to the end is charged only the taker fee on your entry (and nothing at all if you entered as a maker).
What is the payout if my Polymarket position wins?
Every share redeems for exactly $1.00 when the market resolves in your favor. Buy at 63¢ and each share returns $1.00 — about 37¢ profit per share before fees.
Disclaimer: This calculator is an estimate for informational purposes only and does not constitute financial advice. Prediction markets carry risk; do your own research before committing capital.