APR calculator

Polymarket APR calculator: compare return, fees and settlement time.

Calculate simple annualized return for a Polymarket position using purchase price, payout, days to resolution, capital, fees and settlement delay.

Updated July 15, 2026 · Educational content · Not financial advice

Estimate

Simple annualized return
106.41%
Net profit
$2.04
Simple return
2.04%
Expected proceeds
$102.04
Time used
7 days

This is a simple annualization, not compounding. It assumes the expected payout occurs and does not estimate loss probability, slippage, taxes or changing prices.

Formula used

Net profit = (capital ÷ purchase price × expected payout) − capital − fees

Simple APR = (net profit ÷ capital) × (365 ÷ total days)

Total days includes the scheduled time to resolution plus any estimated settlement delay. 99market uses the same simple annualization concept for ranking, without compounding.

How to interpret the result

The calculator compares the size and speed of a hypothetical return. It does not estimate the probability of winning, future reinvestment rates or the market's true risk-adjusted value. A large APR can be produced by a tiny expected profit over a very short period and can be overwhelmed by one loss, slippage or delayed settlement.