10/12/2026
Important Notice: Dyed Diesel
The recent federal announcement regarding dyed diesel tax relief does not change Washington State law or fuel tax requirements.
At this time, Washington’s current laws and requirements regarding the use of dyed diesel on public highways remain in effect. Untaxed dyed diesel may not be used on Washington public roads unless otherwise authorized under Washington law.
The federal announcement does not automatically change Washington’s fuel tax or IFTA reporting requirements. Washington will provide additional information if state laws or requirements change.
States that are making temporary changes are doing so on a very limited basis and a shorter timeline than what is outlined and under consideration at the Federal level. There is no indication that Washington State will follow suit. WTA is in touch with agency partners and will provide updated information when available.
For more information on using dyed diesel in Washington, please visit the Department of Licensing’s Dyed Diesel webpage.
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