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What are the trading hours?

Polymarket US operates nearly 24/7, with a recurring weekly maintenance window every Thursday from 2am–6am ET. Specific markets may have different trading hours based on the underlying event.

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How do I fund my account?

Deposit via debit card or bank transfer (ACH) through the Polymarket US app. See the app’s funding section for deposit limits and processing times.

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How do I get support?

Email support@polymarket.us or use the in-app chat.

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Where can I check system status?

View live system status, incidents, and scheduled maintenance at status.polymarketexchange.com.

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When are maintenance windows?

Every Thursday, 2am–6am ET is the recurring weekly maintenance window, effective July 9, 2026. Previously, the window was every Thursday, 6am–8am ET.

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What happens to open orders during maintenance?

All open orders are canceled before maintenance begins. Leaving resting orders on the book during maintenance would expose traders to stale fills when the book reopens.

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What happens to connections during maintenance?

All API requests return 503 Service Unavailable during maintenance. An explicit rejection is preferable to leaving connections open but non-functional.

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When do markets reopen?

Connections are re-enabled first, then markets move from SUSPENDED to OPEN. Order books reopen empty since all orders were cancelled before maintenance. The state change signals that maintenance is complete.

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What are fractionalQtyScale and priceScale, and how do I convert quantities and prices?

On the Institutional REST and gRPC APIs, quantities and prices are transmitted as integers. To convert them into whole shares and whole dollars, divide by the instrument’s scale factors:
  • Quantities — divide by fractionalQtyScale. For example, with fractionalQtyScale = 100, an integer quantity of 100 is 1 whole share, and 1 is 0.01 of a share (1% of a contract).
  • Prices — divide by priceScale. For example, with priceScale = 100, an integer price of 50 is $0.50.
Both fractionalQtyScale and priceScale are returned per instrument in reference data. Always read them from the instrument before submitting or interpreting orders — do not assume a fixed scale across instruments. Note that int64 fields like priceScale and fractionalQtyScale are serialized as strings in JSON, so parse them as numbers in your client.
On FIX, prices and quantities are pre-scaled. FIX messages carry decimal values directly, so you do not apply priceScale or fractionalQtyScale to them. Scaling only applies to the integer values on the REST and gRPC APIs.