What Is a Fuel Surcharge? How to Set One for Your Business
A fuel surcharge is an extra charge that rises and falls with the price of fuel. Carriers use it to protect themselves from swings at the pump, and many small businesses that drive for a living can use one too. This explainer shows how fuel surcharges work, how parcel carriers and truckers calculate them, and how to set a fair, transparent surcharge for your own business.
Key takeaways
- A fuel surcharge is a separate, variable charge tied to a public fuel price index, usually the EIA weekly diesel price.
- The two common methods are a per-mile surcharge and a percentage table that rises with the fuel price.
- Parcel carriers such as FedEx and UPS publish weekly percentage surcharges; check their rate pages for current figures.
- A fair surcharge has a clear base price, a public index, a regular update schedule and goes down when fuel prices fall.
As of late October 2026, fuel surcharges are getting more attention than usual. The EIA national average diesel price was $6.199 per gallon on 5 October 2026, and carriers have added or raised fuel surcharges as a result. If you ship parcels, buy freight or run vehicles yourself, understanding how these charges work helps you budget, check invoices and price your own services.
This article is general information, not legal, tax or financial advice. Contracts and local rules vary, so check carrier rate pages, your agreements and a qualified adviser for your situation.
What a fuel surcharge is, and why it exists
A fuel surcharge is a charge added on top of a base rate to cover changes in fuel costs. Instead of rewriting every price whenever fuel moves, a business sets its base rates assuming a certain fuel price, then adds or removes a surcharge as the real price changes.
This approach has advantages for both sides:
- For the business, it protects margins when fuel spikes without forcing constant repricing.
- For the customer, it makes the fuel part of the price visible and lets it fall when fuel gets cheaper, instead of being baked permanently into higher base rates.
Fuel surcharges are standard in trucking, parcel shipping, airlines and freight forwarding. They are also used by couriers, moving companies, towing services, landscapers, HVAC and plumbing contractors, mobile repair technicians, equipment rental firms and caterers who deliver.
The index behind most surcharges
Most US fuel surcharges are set weekly using the Energy Information Administration (EIA) on-highway diesel price. The EIA publishes these prices every Monday, both as a national average and by region.
Using a public index matters. Your customers can check it, it cannot be adjusted by you, and it moves with the market. Some businesses use a regional EIA figure instead of the national average because their fuel costs follow local prices. Whichever you choose, name it in your terms.
Method 1: the per-mile fuel surcharge
Trucking companies and owner-operators often use a per-mile surcharge. The formula is simple:
Per-mile surcharge = (current diesel price minus base price) divided by the truck's miles per gallon
The base price is the fuel price already built into your base rate. The miles per gallon figure is the average fuel economy of the vehicle or fleet doing the work.
Hypothetical example
For example, imagine a carrier with a base price of $4.00 per gallon and trucks averaging 6.5 miles per gallon. If the weekly index is $6.20, the surcharge is ($6.20 minus $4.00) divided by 6.5, which equals about 34 cents per mile. On a 500-mile load, that adds about $169. These numbers are made up to show the math.
The per-mile method works well when distance drives your fuel use, such as long-haul freight or regional delivery routes. It is transparent and easy to audit.
Method 2: the percentage table
Parcel carriers and many freight companies use a percentage surcharge instead. They publish a table that sets a surcharge percentage for each band of fuel prices. When the index moves into a higher band, the percentage rises. The percentage is then applied to the base shipping charge.
| Weekly diesel index (hypothetical) | Surcharge (hypothetical) |
|---|---|
| Below $4.00 | 0% |
| $4.00 to $4.49 | 4% |
| $4.50 to $4.99 | 8% |
| $5.00 to $5.49 | 12% |
| $5.50 to $5.99 | 16% |
| $6.00 to $6.49 | 20% |
The table above is a made-up illustration, not any carrier's real table. Real carrier tables have many more bands, and carriers revise them from time to time. UPS, for example, revised its fuel surcharge index table in April 2026.
The percentage method suits businesses where fuel is part of a broader service price, such as a courier fee, a service call or a delivery charge. It is easy for customers to understand because it appears as a single percentage line.
What parcel carriers charge right now
If you ship parcels, the carrier's fuel surcharge is one of the biggest moving parts of your shipping bill. FedEx's published Ground fuel surcharge was 28.75% for the week of 12 to 18 October 2026, according to a third-party summary. Figures change weekly and differ by service, so always check the current numbers on USPS, UPS and FedEx rate pages rather than relying on a summary.
Fuel is not the only extra. FedEx demand surcharges, often called peak surcharges, apply from 26 October 2026 to 17 January 2027. These are separate from fuel surcharges, and both can apply to the same shipment. When you compare carriers, compare the total cost of a typical parcel, including base rate, fuel surcharge and any peak or residential charges.
Common mistake
Comparing carriers on base rates alone. A lower base rate can be cancelled out by a higher fuel surcharge or extra peak fees. Price out a few of your most common parcels end to end before switching.
How to set a fuel surcharge for your business
If fuel is a meaningful part of your costs, a surcharge can be fairer and simpler than repeated price hikes. Follow these steps.
- Choose your index. Use the EIA weekly diesel price (or gasoline price if your vehicles run on gasoline), national or regional. Write down which one.
- Set a base price. Pick the fuel price that your current base rates already cover. Below this price, no surcharge applies.
- Pick a method. Use per-mile if distance drives your costs, or a percentage of the job or delivery fee if fuel is one part of a broader service.
- Calculate with your own data. Use your real fuel economy and real job mix. For a percentage, estimate how much fuel each dollar of revenue uses at the base price, then scale it up as prices rise.
- Decide how often to update. Weekly matches the EIA schedule. Monthly is simpler for small service businesses. Either way, apply it consistently.
- Publish it clearly. Show the surcharge as a separate line on quotes and invoices, and explain the formula in your terms or on your website.
- Lower it when fuel falls. A surcharge that only goes up will damage trust. Let the formula work both ways.
Pro tip
Keep a simple spreadsheet that pulls in the weekly index, shows your surcharge calculation and logs the date each rate took effect. If a customer asks why the charge changed, you can show them in seconds.
Contracts, disclosure and customer communication
A fuel surcharge only works if customers have agreed to it. A few practical points:
- Existing contracts: if a contract sets a fixed price, you usually cannot add a surcharge without the customer's agreement. Check the wording and talk to the customer.
- New contracts: include a fuel adjustment clause that names the index, base price, method and update schedule.
- Consumers: when selling to households, show the surcharge before they commit, not just on the final invoice. Hidden or surprise fees can raise consumer protection concerns. Rules vary by state, so check with a lawyer if you are unsure.
- Notice: tell regular customers before a new surcharge starts, explain why and show them the formula.
Hypothetical example
Imagine "Northside Appliance Repair," a two-van business. The owner sets a base gasoline price at the level built into current call-out fees and adds a percentage surcharge that rises by a set step for each band above it, updated on the first Monday of each month. The rule is printed on the website and every invoice. When a customer asks about it, the technician shows the table. Names and figures are made up.
Your fuel surcharge checklist
- Choose a public index and note national or regional
- Set a base fuel price that matches your current rates
- Pick per-mile or percentage based on how you use fuel
- Calculate using your real fuel economy and job mix
- Set a regular update day and stick to it
- Show the surcharge as a separate line on quotes and invoices
- Add a fuel adjustment clause to new contracts
- Check carrier rate pages weekly for your own shipping costs
Frequently asked questions
Is a fuel surcharge the same as a delivery fee?
No. A delivery fee is usually a fixed charge for the service. A fuel surcharge is a variable charge tied to fuel prices that should rise and fall with an index. Some businesses use both.
How often do carriers change their fuel surcharges?
Most parcel and freight carriers update weekly, based on the EIA diesel price published every Monday. Check each carrier's rate page for its exact schedule and current percentage.
Can I negotiate a carrier's fuel surcharge?
Small shippers usually pay the published rate, but businesses with steady volume sometimes negotiate discounts on surcharges or base rates. It is worth asking your account representative or comparing shipping platforms.
What base price should I choose?
Use the fuel price that your current base rates were built on. If you are unsure, look at the index around the time you last set your prices. A base that is too low makes the surcharge look large; one that is too high leaves you exposed.
Related reading
The bottom line
A fuel surcharge is a transparent way to share fuel cost swings with customers. Carriers base theirs on the EIA weekly diesel price, using either a per-mile formula or a percentage table. You can do the same: choose an index, set a base price, pick a method, update on a regular schedule and lower the charge when prices fall.
As of late October 2026, with diesel above $6 a gallon and peak season surcharges starting, check USPS, UPS and FedEx rate pages and the EIA data every week so your prices and budgets reflect real costs.
