Run the numbers. The savings are bigger than you think.
Most contractors, farmers, and equipment operators know that dyed diesel costs less than clear diesel. What they often do not know is exactly how much less — and how quickly those savings compound into serious money. We have talked to hundreds of diesel users across the Denver metro area and the Front Range, and the pattern is always the same: people are surprised when they actually see the numbers.
If you are running off-road diesel equipment on clear (taxed) fuel, you are paying over 50 cents per gallon in taxes that you do not legally owe. On a mid-size operation burning 2,000 gallons per month, that is more than $12,000 per year leaving your bank account unnecessarily. Over five years, that figure exceeds $61,000.
This article breaks down the math in detail. We will show you exactly where the savings come from, what they look like at different usage levels, and how to start capturing them immediately. No complicated tax forms. No operational changes. Just a different color of the exact same fuel in your off-road equipment.
If you are not sure whether your equipment qualifies for dyed diesel, read our red dye vs. clear diesel comparison first, or review the IRS rules for dyed diesel for the legal details.
Every gallon of clear diesel sold in Colorado includes two layers of fuel tax: the federal highway excise tax and the Colorado state diesel tax. When you purchase dyed diesel for qualifying off-road use, both taxes are eliminated.
The federal excise tax of 24.4 cents per gallon funds the Highway Trust Fund. It applies to all diesel used in vehicles operating on public roads. The Colorado state diesel tax of approximately 26.8 cents per gallon funds state transportation infrastructure. Both taxes are collected at the terminal rack and passed through to the end user in the per-gallon price of clear diesel.
Dyed diesel bypasses both taxes because it is designated for off-road use only. The fuel leaves the terminal already dyed, and the taxes are never collected. This is not a refund, a credit, or a rebate — the taxes are simply never charged in the first place. The savings hit your bottom line immediately on every gallon delivered.
Bottom line: If you are currently running clear diesel in off-road equipment — excavators, generators, tractors, compressors, or any engine that never touches a public road — you are overpaying by 51.2 cents on every single gallon. That money should be in your operating budget, not the Highway Trust Fund.
Abstract numbers are useful, but what matters is what the savings look like for your specific operation. Below, we have calculated the savings for three common scenarios based on actual usage patterns we see among our customers in the Denver market.
| Operation Size | Monthly Usage | Monthly Savings | Annual Savings |
|---|---|---|---|
| Small Contractor | 500 gal/month | $256 | $3,072 |
| Mid-Size Operation | 2,000 gal/month | $1,024 | $12,288 |
| Large Fleet | 5,000 gal/month | $2,560 | $30,720 |
A small contractor might run a single excavator or skid steer on one or two job sites, plus a portable generator. At 500 gallons per month of off-road diesel, the tax savings are 500 × $0.512 = $256 per month. Over the course of a year, that is $3,072.
Three thousand dollars per year may not sound transformative, but consider what it represents: it is free money that requires zero operational change. You are not buying cheaper fuel, cutting corners, or taking on risk. You are simply using the correct fuel type for off-road equipment and keeping the tax savings that you are legally entitled to.
A mid-size construction company or agricultural operation with several pieces of heavy equipment typically burns through 2,000 gallons of off-road diesel per month. This is common for companies running a mix of excavators, loaders, and generators across two to four active job sites.
At 2,000 gallons per month: 2,000 × $0.512 = $1,024 per month in tax savings. Annualized, that is $12,288. Over five years, you have saved $61,440.
Twelve thousand dollars per year is the cost of a full-time seasonal laborer. It is a down payment on a new skid steer. It is the annual insurance premium for most small construction companies. This is real operating margin that goes straight to your bottom line.
Larger operations — multi-crew construction firms, mining operations, large agricultural operations, or companies with extensive generator networks — regularly consume 5,000 or more gallons of off-road diesel per month.
At 5,000 gallons per month: 5,000 × $0.512 = $2,560 per month. Annually: $30,720. Over five years: $153,600.
At this volume, the tax savings alone exceed the cost of many pieces of heavy equipment. A hundred and fifty thousand dollars over five years is the kind of money that changes capital planning conversations.
One of the most compelling aspects of the dyed diesel tax savings is that they are recurring. Unlike a one-time equipment discount or a seasonal promotion, the tax savings apply to every gallon, every month, every year that you operate off-road diesel equipment. The cumulative impact grows steadily.
Here is what the savings look like over time for a mid-size operation using 2,000 gallons per month:
Perspective check: $61,440 over five years is enough to purchase a quality used excavator, a new skid steer, or a fleet of generators. That is a new piece of revenue-generating equipment paid for entirely by switching fuel types. No additional revenue needed. No cuts to other budgets. Just the correct fuel in the correct equipment.
And these numbers are conservative. They assume no increase in diesel consumption over time. In reality, most growing operations increase their fuel usage as they add equipment and take on more projects. The actual five-year savings for a growing mid-size company could easily exceed $75,000 to $80,000.
In our experience delivering fuel across the Denver metro area and the Front Range, we encounter businesses every week that are running clear diesel in off-road equipment. Some do not know that dyed diesel exists. Others assume the switch is complicated or requires paperwork they do not have time for. Still others have heard myths about dyed diesel being lower quality or causing engine problems (it is not, and it does not — we debunk those myths in our clear vs. dyed diesel guide).
Here are the operations we most commonly see overpaying for off-road fuel:
Running clear diesel in excavators, bulldozers, skid steers, and loaders that never leave the job site. Every gallon in that equipment is being taxed unnecessarily.
Using taxed fuel in tractors, combines, irrigation pumps, and grain dryers. Agricultural operations have some of the broadest exemptions under federal tax law.
Running generators on clear diesel for events, construction power, and temporary installations. Generator fuel qualifies for the off-road tax exemption.
Heavy equipment in quarries, mines, and logging operations consumes enormous volumes of diesel. The per-gallon savings at these volumes are substantial.
If your business falls into any of these categories and you are currently fueling off-road equipment with clear diesel, you are leaving real money on the table every single day. The switch is simple, the savings are immediate, and the fuel performance is identical.
This is the question we hear from almost every business owner the first time they consider switching to dyed diesel. They assume there must be some catch — extra paperwork, complicated ordering, separate deliveries, or operational disruption. We understand the skepticism. In most industries, saving money involves some kind of trade-off.
With dyed diesel, there is no trade-off. Here is why:
There is no hassle. The Fuel Guys deliver both clear and dyed diesel. Same truck. Same driver. Same scheduling system. Same delivery guarantee. When you call us or submit a delivery request, you simply tell us how many gallons of each fuel type you need and which equipment gets which fuel. We handle the rest.
There is no performance difference. Dyed diesel is chemically identical to clear diesel. Same ULSD. Same ASTM D975 specs. Same BTU content. Same cetane rating. Your equipment will not know the difference, because there is no difference. The only change is the color of the fuel and the number on your invoice.
There is no operational change. Your equipment stays the same. Your fueling schedule stays the same. Your maintenance schedule stays the same. The only thing that changes is which tank gets which fuel, and our drivers manage that on their end.
The invoicing is clean and separate. Every delivery we make documents dyed and clear diesel as separate line items, with equipment types and delivery locations noted. If you are ever audited, your fuel records are already organized. We also maintain these records on our side, so you have a backup source of documentation if you ever need it.
The real question is not "Is it worth the hassle?" The real question is: "Can you afford to keep paying taxes you don't owe?" At 51.2 cents per gallon, every month you wait is money that should be in your operating budget.
Getting started with dyed diesel is a four-step process that takes less time than reading this article.
Walk your yard or job site. List every diesel engine that operates exclusively off public roads: excavators, loaders, generators, pumps, compressors, tractors, and any other off-road equipment.
Call us at (720) 736-1614 or use the form below. Tell us your estimated monthly gallons and what equipment you need fueled. We will provide a quote within hours.
Our truck arrives on your schedule. We fuel your off-road equipment with dyed diesel and any highway vehicles with clear diesel — all in one trip, with clean, separated invoicing.
Every gallon of dyed diesel you use saves approximately 51.2 cents in federal and state taxes. No setup fees. No contracts. No operational changes. Just lower fuel bills starting immediately.
Most customers are fully set up and saving money within one to two business days of their first call. If you already have a fuel delivery provider, switching to The Fuel Guys is seamless — we can match your existing schedule and begin delivering dyed diesel on your next fueling cycle.
Tell us about your operation and we will send you a quote within 24 hours.
The Fuel Guys deliver dyed diesel across the Denver metro area. Same fuel, zero highway tax. Start saving today.
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