Red-dyed diesel: who can use it and the penalty for misuse
Red-dyed diesel is diesel fuel sold without the federal highway fuel tax, for nontaxable uses: farming, off-highway equipment, generators, heating, and a few others. Using it in a vehicle registered for public roads normally carries a federal penalty of at least $1,000 or $10 a gallon, whichever is more (26 U.S.C. 6715). Through December 31, 2026, that federal penalty is suspended; see below.
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Temporary relief through December 31, 2026
Federal: after an October 5, 2026 executive order, the IRS announced it won't impose penalties when dyed diesel is sold for or used on highways nationwide, retroactive to October 1 and in effect until December 31, 2026. Federal inspections of on-road dyed fuel are suspended for that period (IRS, IR-2026-122).
- The tax isn't forgiven yet. The IRS says it expects to issue guidance postponing payment of the tax, and will "explore avenues" to eliminate the deferred amount (IRS, IR-2026-122). Keep your own fuel records anyway.
- State rules still apply. The IRS relief "has no effect on state fuel taxes and penalties" (IRS, IR-2026-122).
Michigan: Executive Order 2026-15 lets motor vehicles with farm or wood harvester license plates use dyed diesel on public roads, by suspending the state Motor Fuel Tax Act provisions that prohibit it. It ends no later than December 31, 2026 (Michigan Governor, EO 2026-15). Other vehicles aren't covered under Michigan law.
Other states have their own rules during this period; check your state revenue department. After December 31, the normal rules below apply again unless they're extended.
Why diesel is dyed
The dye marks fuel that's exempt from the federal diesel tax. Diesel and kerosene destined for a nontaxable use can be sold tax-free if they're indelibly dyed (26 U.S.C. 4082). The required dye is Solvent Red 164, at a set minimum concentration (26 CFR 48.4082-1). The federal tax on undyed diesel is $0.244 a gallon; on dyed diesel, only the $0.001 leaking underground storage tank tax applies (IRS Publication 510). States have their own fuel taxes and enforcement on top of that.
The fuel itself is the same. Red diesel isn't a different grade or quality. It's taxed differently.
Who can legally use it
Dyed diesel is only for "nontaxable uses." For most readers here, that means one of these, from IRS Publication 510 (IRS Publication 510):
| Use | What counts |
|---|---|
| On a farm for farming purposes | Cultivating soil; raising or harvesting crops; raising, feeding, or caring for livestock; operating and maintaining the farm and its equipment; handling, drying, or storing crops you mostly grew yourself |
| Off-highway business use | Fuel used in a business or income-producing activity, other than in a highway vehicle registered or required to be registered for public roads. Includes stationary machines like generators and compressors, and forklifts, bulldozers, and earthmovers |
| Other than in a highway vehicle's engine | Such as home heating oil |
| Others | Exclusive use by state or local government, school buses, export, and a few other listed uses |
The line is the public road. A highway vehicle is any self-propelled vehicle designed to carry a load over public highways: cars, pickups, highway trucks, and buses (IRS Publication 510). Fuel in one that's registered, or required to be registered, isn't an off-highway business use. Tractors, combines, skid steers, loaders, and generators are the usual legal uses.
Farm trucks are where people get caught. A truck registered for the road isn't off-highway equipment just because it's on a farm. If you're not sure about a specific vehicle, ask your state's revenue department or a tax advisor before you fill it with dyed fuel.
The penalty (outside the relief period)
The federal penalty is the greater of $1,000 or $10 for each gallon of dyed fuel involved, for each act, in addition to any tax (26 U.S.C. 6715(b)). It applies to:
- Using dyed fuel, or holding it for use, for a taxable use when you knew or had reason to know it was dyed
- Selling dyed fuel for a use the seller knows or has reason to know is taxable
- Willfully altering, or trying to alter, the dye, such as filtering it out
Source: 26 U.S.C. 6715(a).
- Repeat violations cost more. The $1,000 minimum goes up with each prior penalty (26 U.S.C. 6715(b)(2)).
- Employees can be on the hook. If a business is penalized, officers, employees, or agents who willfully took part can be held jointly liable (26 U.S.C. 6715(d)).
States can add their own penalties.
Storing dyed and clear diesel
Field note: Most of the farms I service have just one diesel tank.
- If you keep both, use separate, labeled tanks and hoses. Dyed fuel is defined by the dye, whether or not it was dyed under the tax rules (26 U.S.C. 6715(c)), so clear fuel that picks up dye from a shared tank or hose can look like dyed fuel in a road vehicle.
- Sellers have to post a notice. Any retail pump or delivery facility selling dyed diesel must post "DYED DIESEL FUEL, NONTAXABLE USE ONLY, PENALTY FOR TAXABLE USE." A seller without the notice is presumed to know the fuel won't be used for a nontaxable use (26 CFR 48.4082-2). Many farms label their own tanks the same way.
- Everything else is the same as clear diesel: keep water out, watch for microbes, and treat it for winter. See water in your diesel tank and diesel gelling.
FAQ
Is red diesel a different fuel?
No. It's diesel with red dye added to show the federal fuel tax wasn't paid. The required dye is Solvent Red 164 (26 CFR 48.4082-1). It burns the same as clear diesel of the same grade.
Can I put red diesel in my pickup?
Normally no, not if the pickup is registered, or required to be registered, for public roads. Fuel in a registered highway vehicle isn't an off-highway business use (IRS Publication 510), and the penalty is at least $1,000 (26 U.S.C. 6715). Through December 31, 2026, the federal penalty is suspended (IRS), but state rules still apply; Michigan's order covers only farm and wood harvester plates (Michigan EO 2026-15).
Can I filter the dye out?
No. Willfully altering or trying to alter the dye is its own violation, with the same penalty (26 U.S.C. 6715(a)(3)).
Can I use red diesel for home heating?
Heating oil and fuel used other than in a diesel-powered highway vehicle are among the uses IRS lists as nontaxable (IRS Publication 510). Check your state's rules too.
Sources
- IRS Publication 510: Excise Taxes
- IRS: Dyed diesel fuel relief, IR-2026-122 (October 14, 2026)
- Michigan Governor: Executive Order 2026-15 on dyed diesel (October 12, 2026)
- 26 U.S.C. 6715, dyed fuel sold for use or used in taxable use (Cornell LII)
- 26 U.S.C. 4082, exemptions for diesel fuel and kerosene (Cornell LII)
- 26 CFR 48.4082-1, dyeing requirements (Cornell LII)
- 26 CFR 48.4082-2, notice requirements for dyed fuel (Cornell LII)
This guide is general information, not tax or legal advice. State fuel taxes and rules differ; for a specific vehicle or use, check with your state revenue department or a tax advisor.