Fuel licenses: Dyed diesel user

Who needs a license?

You must have a dyed diesel user license to operate licensed motor vehicles on public roads or highways using special dyed fuel. Dyed diesel users must be approved government agencies or organizations, such as:

  • Public school districts
  • Nonprofit educational organizations
  • Government agencies

How to get your license

  1. Complete a Dyed Diesel User Application.
  2. Send the completed application to the address or fax number on the form.
  3. After we’ve processed your application, we’ll send you a copy of your license, your first tax return, and instructions.

Recordkeeping requirements

You must keep detailed mileage records for each vehicle using dyed fuel on public roadways. These records must include on-road and off-road use on a daily basis.

How to file your tax return

Complete an Dyed Diesel Fuel User Tax Return and:

  • If you’re including a payment, mail your completed return and a check to:
    Prorate and Fuel Tax
    Department of Licensing
    PO Box 3777
    Seattle, WA 98124-3777
  • If you’re sending only your return (without a payment), mail or fax it to:
    • Mail:
      Fuel Tax Section
      Department of Licensing
      PO Box 9228
      Olympia, WA 98507-9228
    • Fax: 360.570.7839 or 360.586.9729

For more information about completing your return, see Dyed Diesel Tax Return Instructions.

Reporting due dates

Reporting period Report and payment due
January–March 2014 April 25, 2014
April–June 2014 July 25, 2014
July–September 2014 October 27, 2014
October–December 2014 January 26, 2015

Late payments

If your payment isn’t received by our office on or before the due date, you’ll be charged a 10% penalty on the tax owed. If your payment isn’t received before the first of the following month, interest of 1% per month will accrue.

For more information

If you have questions about dyed diesel user licenses, call 360.664.1858.

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