Fuel Surcharge Guide for Owner-Operators and Small Fleets
By iAgency
Diesel has been the biggest cost story in trucking this fall. The U.S. Energy Information Administration (EIA) put the national average for on-highway diesel at about $6.29 a gallon in the week of November 2, 2026, and the average has stayed above $6 for eight weeks in a row, Overdrive reported. That is roughly $2.54 more per gallon than a year earlier. The good news: prices dipped in every region that week, and a clear fuel surcharge can keep much of that cost from coming out of your pocket. Here is how a fuel surcharge works and how owner-operators and small fleets can use one to protect their margins.
Key takeaways
Diesel is high but moving. EIA data showed the national average near $6.29 in early November, down about 6 cents from the week before.
A fuel surcharge passes cost changes through. It ties part of your pay to the weekly diesel price, so you are not stuck with a rate set when fuel was cheaper.
Use one public benchmark. Most surcharge tables use the weekly EIA diesel average, which anyone can check for free.
Know your real cost per mile. Your miles per gallon and lane mix decide whether a surcharge actually covers your fuel.
What a fuel surcharge is
A fuel surcharge is an extra charge on a load or a contract that rises and falls with the price of diesel. Instead of guessing where fuel will be next month, you and your customer agree on a base fuel price and a formula. When diesel goes above the base, the surcharge goes up. When diesel falls, it goes down. It keeps your linehaul rate about your service, and the fuel piece about fuel.
On the spot market, many brokers quote an all-in rate. That number already includes fuel, so it is up to you to check that it covers today's diesel cost. With contract and dedicated customers, a written surcharge schedule is more common.
How the math works
There is no single required formula, but a common one looks like this:
Step 1. Take the current weekly EIA diesel price for the region in your agreement.
Step 2. Subtract the agreed base price.
Step 3. Divide by an agreed miles-per-gallon figure. The result is the surcharge per mile.
Here is a simple example with round numbers. If the base price is $4.00, diesel is $6.00 and the agreed figure is 6 miles per gallon, the surcharge is $2.00 divided by 6, or about 33 cents per mile. On a 500-mile load, that adds about $167. The exact base, region and MPG are business terms you set with each customer.
Five ways to protect your margins
Check the EIA price every week. EIA publishes its on-highway diesel average most Mondays at eia.gov. Regional prices can differ by more than $2 a gallon, so use the region that matches the lanes in your agreement.
Know your true fuel cost per mile. Divide what you paid for fuel by the miles you drove for a few weeks. If your truck gets less than the MPG in the formula, the surcharge will not fully cover you.
Put the surcharge in writing. For regular customers, write down the base price, the benchmark, the update schedule and the MPG figure. Clear terms mean fewer billing disputes.
Price spot loads all-in. Before you accept a load, subtract your fuel cost for the trip. What is left has to cover your truck payment, insurance, maintenance and pay.
Cut fuel use where you can. Less idling, steady speeds, correct tire pressure and good route planning all help.
We covered the bigger picture of rising fuel costs in Diesel Prices Doubled: What Truckers Should Do Now, and the relief rules for off-road fuel in Red Dyed Diesel Relief: Is It Worth It for Truckers?.
Where insurance fits in
When fuel eats into cash flow, it can be tempting to cut corners on coverage. That is a risky trade. One uninsured claim can cost far more than a season of high diesel. A better move is to make sure your policy matches how you run today.
Review your radius and miles. If you changed lanes or are running fewer miles to save fuel, tell your agent. Your rating details should match your real operation.
Keep truck values current. If you bought or sold equipment, update the values on your physical damage coverage so a total loss is handled at the right amount.
Use your safety data. Telematics that track idling and hard braking can save fuel and help show a strong safety record. Our risk control services can help you put that data to work.
Have questions about your coverage while costs are high? Start an online quote and we will review your options with you.
Frequently asked questions
What is a fuel surcharge in trucking?
It is an extra charge that moves up and down with the price of diesel, so carriers are paid fairly when fuel costs change.
Where do I find the weekly diesel price?
The U.S. Energy Information Administration publishes national and regional on-highway diesel prices, usually every Monday, on its Gasoline and Diesel Fuel Update page.
Do brokers have to pay a fuel surcharge?
There is no federal rule that requires one. Many spot loads are quoted all-in, so it is up to you to check that the rate covers your fuel.
Will lower fuel prices change my insurance premium?
Fuel prices do not set your premium directly. Your premium depends on things like your driving record, equipment, radius and claims history.
About iAgency
iAgency is a commercial trucking insurance agency for owner-operators, small fleets and the partners who support them, including dispatchers, factoring companies and accountants. Call or text 469-501-1071, email coi@iagency.biz for certificates, or get an online quote.
Source: Overdrive, Diesel prices holding above $6/gal. nationwide as rates stagnate (Nov. 3, 2026). Also: U.S. Energy Information Administration, Gasoline and Diesel Fuel Update.
Photo: Lasse Nystedt on Unsplash.
This article is general information, not coverage or legal advice. Coverage depends on your policy terms.