The 16 Nontaxable Uses of Fuel

The federal government taxes gasoline, diesel, and kerosene on the assumption they’ll burn on a public highway. When fuel goes somewhere else — a combine, a generator, a bulldozer, an export shipment — the tax can come back. The gatekeeper is the type-of-use table printed in the Form 8849 and Form 4136 instructions: sixteen numbered categories, and your claim must name one.

Here is the full table, the traps hidden in the popular categories, and the claim-ordering rules that decide who may file.

The complete type-of-use table

From the current Form 8849 (Rev. May 2026):

1 — On a farm for farming purposes
2 — Off-highway business use (business use other than in a highway vehicle registered or required to be registered for highway use, and other than mobile machinery)
3 — Export
4 — In a boat engaged in commercial fishing
5 — In certain intercity and local buses
6 — In a qualified local bus
7 — In a bus transporting students and employees of schools
8 — Diesel or kerosene used other than as a fuel in a propulsion engine of a train or diesel-powered highway vehicle (includes heating oil and boats, but not off-highway business use)
9 — In foreign trade
10 — Certain helicopter and fixed-wing aircraft uses
11 — Exclusive use by a qualified blood collector organization
12 — In a highway vehicle owned by the United States that is not used on a highway
13 — Exclusive use by a nonprofit educational organization
14 — Exclusive use by a state, political subdivision of a state, or the District of Columbia
15 — In an aircraft or vehicle owned by an aircraft museum
16 — In military aircraft

The fine print on the big categories

Type 2, off-highway business use, is the workhorse — construction equipment, generators, refrigeration units, forklifts, stationary engines. Its exclusions are where claims fail: the Schedule 1 instructions specify that "Type of use 2 does not include any personal use or use in a motorboat," and the definition itself excludes any highway vehicle registered (or required to be registered) for highway use. Mobile machinery is carved out of type 2 and follows its own annual-claim path.

Type 8 quietly covers heating oil — undyed diesel or kerosene burned in a furnace is a refundable use — and boats other than commercial fishing vessels. Export claims (type 3) require proof of exportation, such as the export bill of lading or a foreign customs certificate.

Dyed diesel and dyed kerosene generate no refund — the tax was never paid on dyed fuel. The refund system exists for taxed, undyed fuel put to nontaxable use, and undyed-fuel claims require certifying the fuel showed no visible evidence of dye.

Who claims — and the government/school cascade

The default claimant is the ultimate purchaser: the business that used the fuel. But for types 13 and 14 — schools and state or local governments — the claim right runs through a cascade: first a registered credit card issuer (if fuel went on a qualifying card), then a registered ultimate vendor, and only then the purchaser itself, when neither registrant is eligible. Blocked-pump kerosene claims never belong to the buyer at all — only UP-registered vendors may claim those, on Schedule 2.

Rates and CRNs

Every claim line carries a credit reference number (CRN) and a per-gallon rate printed on the schedule itself — gasoline nontaxable use is CRN 362 at $.183, undyed diesel CRN 360 at $.243, undyed kerosene CRN 346 at $.243, with reduced rates for intercity-bus use. The claim rate is generally the full tax minus the $.001 leaking underground storage tank (LUST) component, which stays with the government except in foreign-trade claims. Always read the rate off the current form revision rather than a chart from the web — the forms are the authority.

Where to make the claim

Three routes, one gallon each: Form 8849 Schedule 1 for periodic refunds (minimum $750, filed in the quarter after the claim period), Form 4136 for an annual credit with the income tax return (no minimum), or Form 720 Schedule C as an offset if you file Form 720 with liability. The federal government, state and local governments, and section 501(a) organizations that don’t file Form 990-T can’t use Form 4136 — their annual claims go on Schedule 1.

Frequently asked questions

What counts as off-highway business use?⌄

Business use of fuel other than in a registered highway vehicle — construction and farm support equipment, generators, compressors, refrigeration units, forklifts, and stationary engines. It excludes personal use, motorboats, mobile machinery (which has its own claim path), and any vehicle registered or required to be registered for highway use.

Can I get the fuel tax back on heating oil?⌄

Yes — undyed diesel or kerosene used for heating falls under type of use 8 ("other than as a fuel in the propulsion engine of a train or diesel-powered highway vehicle"), which the instructions note includes use as heating oil. In practice most heating oil is sold dyed and untaxed, in which case there is no tax to refund.

Is fuel used in a motorboat refundable?⌄

Generally no for pleasure or ordinary business boats — type 2 explicitly excludes motorboats. The marine exceptions are boats engaged in commercial fishing (type 4) and vessels in foreign trade (type 9); diesel used in other boats can fall under type 8 in limited cases.

Who claims when a school district buys taxed diesel?⌄

It cascades: a registered credit card issuer claims if the fuel went on a qualifying card; otherwise the registered ultimate vendor who sold the fuel; and only if neither is eligible does the government or school itself claim. That ordering rule is printed in the Form 8849 instructions.

Why is my refund a tenth of a cent short per gallon?⌄

The $.001 LUST (leaking underground storage tank) component of the fuel tax is generally nonrefundable — claim rates on the schedules are the tax rate minus that tenth of a cent. Foreign-trade claims are the main exception where the LUST penny itself is claimable.

Related guides

Official sources

Tax rules, rates and deadlines change — verify current requirements against the IRS sources above before acting. This guide is general information, not tax or legal advice.

The 16 Nontaxable Uses of Fuel (Type-of-Use Table)