Fuel Tax

Federal excise tax on motor fuel is 18.3 cents a gallon on gasoline and 24.3 cents on diesel. State fuel taxes sit on top, vary widely and are often the larger of the two. All of it is built into the pump price, so a fleet that never separates it out has no idea what it is paying in tax or what it could recover.

Fuel for the exclusive use of a state or local government is a nontaxable use under federal law. The exemption reaches the fleet by one of two routes. A registered vendor or fuel card issuer sells the fuel without the federal tax and claims it back from the IRS itself, which is the usual arrangement for bulk delivery to an on-site tank. Or the fleet pays the tax at the pump and claims it back, which for a government is a claim on Form 8849, Schedule 8. Which route applies depends on how the fuel is bought, and a fleet running both bulk tanks and retail cards is usually on both.

State treatment is a separate question with a different answer in every state. Some exempt government fuel fully, some partly, some not at all, and the paperwork differs each time. Assuming the federal position carries over to the state is the commonest way a fleet ends up paying tax it does not owe.

Dyed diesel is untaxed fuel restricted to nontaxable uses, and whether a government fleet runs it in road vehicles is a decision to make with the state’s rules and the agency’s auditor rather than a shop-floor default. Where it is used, the fuel has to stay segregated and documented.

The loss here is administrative, and it is silent. An exemption certificate never filed with the vendor, a refund claim nobody submitted, a card program whose tax handling nobody asked about: none of it shows up as an error, because the fuel still arrives and the invoice still gets paid. The money simply never comes back. Someone has to own it by name, and the amount at stake across a year of a mid-sized fleet’s fuel is large enough to be worth naming a person.