Profit/Loss Calculator
Calculate the net profit or loss on any Polymarket trade. Enter your side, entry price, number of shares, and the resolution outcome to see exact P&L including fees.
Total Cost
$50.00
Gross Payout
$100.00
Fee Paid
$0.38
Net Profit/Loss
+$49.63
ROI
+99.3%
Math Breakdown
Side: Buy Yes @ $0.50
Buy price per share (p): $0.50
Total cost: 100 shares × $0.50 = $50.00
Gross payout: 100 shares × $1.00 = $100.00
Fee calculation (Taker):
fee = 100 × 0.50 × 0.03 × (0.50 × 0.50)^1
fee = 100 × 0.50 × 0.03 × 0.2500^1
fee = 100 × 0.50 × 0.03 × 0.250000
fee = $0.3750
Net profit: $100.00 - $50.00 - $0.38 = +$49.63
ROI: +49.63 / 50.00 × 100 = +99.3%
Breakeven price: $0.5038 per share
Sports markets: feeRate = 0.03, exponent = 1. Fee formula: fee = shares × p × 0.03 × (p(1-p))^1.
How Polymarket Profit Works
Every Polymarket trade has a binary outcome: your shares either pay out $1.00 (if your side wins) or $0.00 (if it loses). Your profit or loss is the difference between the payout and your cost, minus any trading fees.
For example, if you buy 100 Yes shares at $0.60 each, you spend $60. If the market resolves Yes, you receive $100 — a $40 gross profit. Subtract the taker fee (which varies by category and price), and you get your net profit. If the market resolves No, you receive $0 and lose your entire $60 plus fees.
Buying Yes vs Buying No
You can profit from outcomes going either way. Buying Yes at $0.60 is economically equivalent to selling No at $0.40. The calculator handles both sides — select “Buy No” if you believe the outcome will not happen and want to profit from a No resolution.
Frequently Asked Questions
How do you calculate profit on Polymarket?
Profit = (payout per share × number of shares) - (entry price × number of shares) - trading fees. Use the calculator above to see exact numbers for any trade scenario. For more on fee mechanics, see Polymarket Fees Explained.
What happens if I lose a Polymarket trade?
If the outcome resolves against your position, your shares pay out $0.00 and you lose your entire investment plus any fees paid. This is why research and position sizing matter.
Do makers pay fees on Polymarket?
No. Maker orders (limit orders) pay zero fees. Only taker orders (market orders) pay fees. Toggle between Maker and Taker in the calculator to see the difference. Learn more in our trading guide.
Calculate your fees in detail with the fee calculator, estimate expected value with the EV calculator, or size your positions with the Kelly Criterion calculator.