WA Intrastate vs Interstate Permit Requirements

Dec. 7, 2025, 8:22 p.m.
Intrastate: Operations entirely within Washington state. Interstate: Operations that cross state lines or involve transport between states. The type of operation determines the permits, licenses, and registrations required.
WA Interstate Permit

Key Permit Requirements for WA Intrastate Operations

  1. Washington State DOT Number (Intrastate Authority)

    • Required for commercial vehicles over 10,000 lbs GVW operating in WA only.

    • Issued by Washington State Department of Transportation (WSDOT).

  2. Fuel Permits (IFTA / WA Fuel Tax License)

    • IFTA: Only if you operate across state lines (interstate).

    • Intrastate fuel permits: WA requires reporting for vehicles operating solely within the state.

  3. Weight & Oversize/Overweight Permits

    • For vehicles exceeding legal weight limits or hauling oversize loads, apply through WSDOT.

    • Seasonal restrictions (e.g., spring load limits) may apply.

  4. Trip Permits

    • For temporary use of a vehicle not registered in WA or operating on nonstandard routes.


Key Permit Requirements for WA Interstate Operations

  1. USDOT Number

    • Required for all commercial vehicles operating in interstate commerce.

    • Issued by Federal Motor Carrier Safety Administration (FMCSA).

  2. Motor Carrier (MC) Number

    • Needed for for-hire carriers transporting regulated goods across state lines.

  3. IFTA (International Fuel Tax Agreement) License

    • Allows reporting fuel use for interstate travel in participating states.

  4. UCR (Unified Carrier Registration)

    • Annual registration for all interstate carriers.

    • Fees based on fleet size.

  5. Oversize/Overweight Permits

    • Still required but may differ for multi-state routes.

  6. Other Federal Compliance

    • HOS (Hours of Service) regulations.

    • Vehicle inspections (FMCSA standards).


Summary Table

Requirement Intrastate WA Only Interstate (Across States)
WA DOT Number Required  Required
USDOT Number  Optional  Required
MC Number Optional  Required (for-hire)
IFTA Fuel License  Optional  Required
UCR Registration  Not required  Required
Weight/Trip Permits  Required if overweight or oversize  Required; check state rules
Federal HOS & Safety Regulations  Only intrastate exemptions  Required