Parcel Cost Drivers
Diesel is up roughly two-thirds in a year, and the ground fuel surcharge on a FedEx or UPS invoice now sits at about 29 percent. Here is what that does to a single package, in dollars, and why the line will not fall back on its own when fuel does.
The number on the invoice, not the number in the headline
Oil prices make the news. Parcel carriers do not bill from oil prices. For ground services, FedEx and UPS read the U.S. Energy Information Administration’s weekly national average for on-highway diesel, look that price up in a published table, and apply the percentage the table returns. The percentage resets every Monday, one to two weeks behind the pump.
A year ago that table produced a FedEx Ground surcharge of 20.50 percent, with diesel in the $3.73 to $3.82 band. In October 2026 the four weekly percentages were 29.25, 28.75, 28.75 and 29.00 — an average of 28.94 percent — with diesel at $6.28 a gallon in the October 19 reading. UPS Ground ran a half point higher, at 29.50 percent for the week of October 26.
Eight and a half points sounds abstract. On a package it is not.
What the surcharge is actually charged on
The fuel surcharge is not applied to the published rate, and it is not applied only to transportation. For FedEx Ground and Home Delivery it is assessed on the net package rate after the discount, plus a published list of surcharges where they apply:
- Residential delivery and delivery area surcharges
- Additional handling and oversize charges
- The demand surcharges in effect during peak season, including the demand charges for residential delivery, additional handling and oversize
- Address correction, signature options and other accessorials
UPS applies the same principle to its own list. Two things follow from this. A transportation discount reduces the dollars fuel is calculated on, but it does not reduce the percentage, which moves with the index regardless of the agreement. And a surcharge that was never negotiated, such as a residential charge billed at the published amount, carries fuel at the full published percentage.
Two packages, one year apart
The examples below hold the rate steady so the fuel change stands alone. Both packages are FedEx Home Delivery to zone 5 at the 2026 published list rates, with a representative 35 percent transportation discount, the published $6.45 residential delivery charge, no fuel discount and no other surcharges. The only thing that changes between the two columns is the fuel percentage: 20.50 percent for October 2025 and the 28.94 percent October 2026 average.
| 10 lb, zone 5 | 25 lb, zone 5 | |
|---|---|---|
| Published list rate | $20.46 | $31.23 |
| Net transportation after 35% discount | $13.30 | $20.30 |
| Residential delivery charge | $6.45 | $6.45 |
| Fuel-eligible amount | $19.75 | $26.75 |
| Fuel at 20.50% (October 2025) | $4.05 | $5.48 |
| Fuel at 28.94% (October 2026 average) | $5.72 | $7.74 |
| Added fuel per package | $1.67 | $2.26 |
| Fuel line increase | 41% | 41% |
| Total package cost, 2025 fuel | $23.80 | $32.23 |
| Total package cost, 2026 fuel | $25.47 | $34.49 |
| Total package increase | 7.0% | 7.0% |
The fuel line grew 41 percent on both packages, because the percentage is the same whatever is underneath it. The whole package grew 7 percent, before the January rate increase that both carriers have already announced for 2027, and before any demand surcharge during peak season. A shipper moving 10,000 of the 10-pound packages a year is paying about $16,700 more in fuel than twelve months ago. At 25 pounds it is about $22,600.
Those are the discounted figures. At the published rate with no discount at all, the same 10-pound package carries $2.27 more fuel and the 25-pound package $3.26 more. The discount shrinks the dollar change, but it cannot touch the rate of change.
Why the line will not come back down with diesel
It is tempting to treat this as weather: fuel went up, fuel will come down, the surcharge will follow. The percentage will certainly fall if diesel falls. It will not fall back to where it was, because the table that converts diesel into a percentage has been rewritten more than once while prices were rising.
FedEx raised its domestic fuel tables in February 2025, adding roughly two points so that $3.74 diesel produced a 20.5 percent Ground surcharge instead of 18.5 percent. It revised the tables again on December 1, 2025, and the current Ground table took effect June 1, 2026. Industry index data tells the same story from the other direction: between the first quarter of 2024 and the first quarter of 2025, FedEx’s ground fuel surcharge rose 12 percent while diesel fell 8.4 percent. And in the current run-up, the TD Cowen/AFS Freight Index attributes just under 30 percent of the surcharge increase to the price of diesel itself, with the rest coming from changes in how the carriers calculate it.
In plain terms: when diesel returns to $4, the table will map $4 to a higher percentage than it did the last time diesel was $4. The structural part of the increase stays.
What this means for the agreement
Fuel is often treated as an uncontrollable pass-through, which is true of the index and false of the agreement. The fuel surcharge is a negotiable term. An agreement can set a discount off the published percentage, cap it, or define which charges it applies to. FedEx’s own terms state that the customer agreement governs how fuel is calculated.
Three things are worth doing before the next renewal conversation:
- Pull the fuel line as a share of total spend from the invoice, transaction by transaction, for the last twelve months. On most ground accounts it has moved from the high teens to nearly a third of transportation cost in two years.
- Identify which surcharges on the account carry fuel and whether any of them are discounted. Residential and delivery area charges are the usual gaps.
- Put a fuel concession on the list of priorities before the carrier’s proposal arrives, rather than reacting to the base discount the proposal leads with. A few points off the fuel percentage now applies to a much larger base than it did a year ago.
The reason this needs invoice data rather than the rate sheet is simple. The rate sheet shows the percentage. The invoice shows what it was charged on.
See what fuel is actually costing per package
A transaction-level read of the invoice shows the fuel line, what it was charged on, and where a fuel term in the agreement would have changed the number.
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