Dyed Diesel on the Road

Posted October 6, 2026

The executive order signed in Grand Island on October 5 lets off-road dyed diesel be run on the highway and defers the federal tax on it. That is real money for an operation hauling its own grain. It is also narrower than the headlines, in two ways that could cost a Colorado producer money if nobody points them out.

What the Order Does

Dyed diesel is the red fuel in the farm tank. It is chemically the same as the clear fuel at the truck stop; the dye marks it as exempt from the 24.4 cent per gallon federal highway excise tax, and in exchange it is restricted to off-road use — tractors, combines, irrigation motors, generators.

The order temporarily lifts that road restriction and directs the Treasury Secretary to defer the federal excise tax on dyed fuel used on the highway for the rest of 2026, without interest or penalties. The Secretary is further directed to explore pathways to eliminate the deferred obligation altogether. Agriculture Secretary Rollins put the projected savings to farmers at roughly $640 million.

Trap One: Deferred Is Not Forgiven

A deferral is a later bill, not a cancelled one. The order postpones the 24.4 cents; it does not erase it. Eliminating the obligation would take further action, and most likely an act of Congress.

If you run dyed fuel on the road this fall and Congress does not act, that tax is still owed. An operation burning 5,000 gallons on-road between now and the end of the year is carrying roughly $1,220 in deferred federal tax — not a windfall, a balance. Plan for the possibility that it comes due, and be pleasantly surprised if it does not.

Trap Two: Colorado’s Tax Is a Separate Question

This is the part that matters most here, and it is the part the national coverage does not cover.

Colorado charges its own special fuel excise tax of 20.5 cents per gallon. An executive order reaches federal tax. It does not reach Colorado’s.

Colorado exempts dyed diesel from that state tax under § 39-27-102.5, C.R.S. — but the exemption is written around off-highway use, and the statute allows dyed fuel to be used for nontaxable purposes permitted by federal law. Whether a temporary federal deferral changes what Colorado treats as exempt is a question for the Colorado Department of Revenue, not for the White House.

We have not been able to confirm that Colorado has issued guidance on this. Until the state says otherwise, assume the 20.5 cents may still be owed on dyed fuel you burn on the road, and keep the records that would let you pay it.

If you hear from the Department of Revenue, or your fuel supplier passes along state guidance, tell us and we will update this page with the source attached.

What to Actually Do

Keep a log. Gallons of dyed fuel burned on-road, and the dates. Both the federal deferral and any state liability are computed off that number, and reconstructing it in March from memory is miserable.
Ask your supplier whether the dyed fuel is ultra-low sulfur. Most farm diesel is, but dyed high-sulfur fuel still exists for heating and off-road use, and putting it through a modern road truck’s emissions system is an expensive mistake that no tax saving covers.
Treat the savings as provisional until the deferred federal tax is actually forgiven and Colorado has spoken on the state side.
Talk to your accountant before changing how you fuel. This is a tax question about your operation, and we are not your accountant.

The Honest Summary

At roughly 24 cents a gallon federal, this is a genuine cost reduction for an operation that moves a lot of its own freight, and it arrives in a year when margins need it. The site has been making that case all autumn: USDA puts the cost of planting an acre of corn near $917 against a season-average price of $4.80.

But a deferral advertised as a saving is the kind of thing that shows up as a surprise later, and a federal order does not settle a state tax. Take the relief. Keep the receipts.

What the October payments look like on Colorado ground →

Federal excise and deferral terms are as described in the October 5 executive order and contemporaneous reporting; the Colorado rate and exemption are from the Colorado Department of Revenue and § 39-27-102.5, C.R.S. This page is general information, not tax advice. CCGA administers no USDA program and does not administer any tax program.