TAP is now available for Dyed Diesel customers. We may experience some delays with the implementation of the new system. Please be patient with our staff.
Dyed diesel is fuel with red dye added to show there are no federal or state fuel taxes paid. Other industry names for dyed diesel are marked fuel, farm fuel, "red dyed" diesel.
Common uses of dyed diesel are non-highway farming equipment, construction equipment, generators, and marine vessels.
Dyed diesel users must have a license for on-road use. You can now register for a dyed diesel user license and manage your account using TAP – PRFT Taxpayer Access Point. This license allows approved government agencies and organizations to use dyed special fuel (diesel or biodiesel) when operating licensed motor vehicles on public roadways. The Internal Revenue Services (IRS) approved users are:
It's illegal to use dyed diesel in vehicles that drive on Washington State public roadways or highways. Examples of illegal use include:
Each violation will result in a fine of $10/gallon or $1,000 per tank, whichever is greater.
The Fuel Tax Evasion Unit is a partnership between us and the Washington State Patrol (WSP). The unit:
WSP conducts thousands of "dips" to check fuel tanks for dyed fuel and determine if the operator is using the fuel against the law. Violators will receive a fine, which may appear on their record as a felony or misdemeanor.
You can report fuel tax evasion by:
You may remain anonymous. If you leave your name and phone number, a task force member will call you back. We investigate all information and keep it confidential.