Bot for Polymarket
Standard US trades
The official US schedule, reviewed October 7, 2026, lists these coefficients for standard trades:
Fee = Θ × contracts × price × (1 − price)
| Component | Coefficient |
|---|---|
| Standard taker fee | 0.0695 |
| Standard maker rebate | −0.0125 |
For a single standard taker fill of 1,000 contracts at $0.50, the exact fee is $17.375, rounded to $17.38. The schedule specifies cent rounding with ties to even. Multiple-fill adjustments can affect the final charge.
October 7 product exceptions
The official notice removes combo maker rebates and sets the Table Tennis taker coefficient to 0.10 from 12:00 AM Eastern on October 7. Combos also use a separate taker curve. Some examples below that notice still show the prior combo maker rebate; verify the applicable schedule and execution report instead of copying those examples.
US and International incentives differ
US taker rebate tiers use prior-calendar-month taker volume. Do not substitute the International calculator’s rolling weighted-volume model. See the US fee schedule and International fee documentation.
Before putting the model into a bot
- Confirm the venue and account path.
- Check the market-specific schedule, liquidity role and execution report.
- Account separately for spread, slippage and any application charges.
- Test the calculation and risk controls before relying on it.
Join the Bot for Polymarket product waitlist for updates on the planned builder.
Fee references and product status updated October 7, 2026: Polymarket US fee schedule.
Part of the Polymarket trading bots handbook.