A Polymarket builder code is an identifier that third-party apps attach to the orders they send to Polymarket, so Polymarket can attribute the volume and the app can charge a builder fee: a flat percentage of the trade value, capped at 1% for taker orders and 0.5% for maker orders, added on top of any Polymarket fee. Nimb is a builder: it charges 0.33% on taker orders from 11 November 2026, included in the all-in amount the ticket shows.
How do builder fees work?
| Market | Builder code attached | You pay |
|---|---|---|
| No platform fee (e.g. geopolitics) | No | Nothing beyond the price |
| No platform fee | Yes | Builder fee only |
| Platform fee | No | Platform fee only |
| Platform fee | Yes | Platform fee + builder fee |
Source: Polymarket: builder fees, checked 8 November 2026. Builders set their own taker and maker rates, in steps of 0.01%, up to 1% and 0.5%; Polymarket gates changes so users can see them coming, and can revoke a builder's fee.
How much is Nimb's builder fee?
0.33% of the order value on taker orders, from 11 November 2026, and nothing on reading. On a $100 order that is $0.33. The ticket folds it into the amount you type, with Polymarket's own fee on its own line. Worked example and break-even: fees and all-in pricing. Why Nimb is funded this way: independence and business model.
What is the Polymarket builder program?
Polymarket's programme for apps that route orders: builders register a profile, get a code, attach it to each order and get API keys, rate-limit tiers and, at higher tiers, rewards. Polymarket publishes a builder leaderboard and volume through its Data API (/v2/builders/leaderboard). Builder program overview · Polymarket API guide.
Frequently asked questions
How much are Polymarket builder fees?
Each builder sets its own, up to 1% on taker orders and 0.5% on maker orders. Nimb's is 0.33% on taker orders.
Do I pay a builder fee on Polymarket's own site?
No. Builder fees apply only to orders routed through a third-party app that attaches its code.
Can a builder see or move my funds?
No. A builder code only labels orders you sign in your own wallet.
Last reviewed 8 November 2026 · Data from Polymarket · Not financial advice · Nimb is not affiliated with Polymarket.