What Is a Fuel Surcharge and How Do UPS and FedEx Calculate It

Every UPS and FedEx invoice contains a fuel surcharge line item. It is not a flat fee. It is a percentage of your base transportation charge that changes every single week based on diesel prices published by the US government. At current 2026 diesel prices that percentage runs 27 percent on FedEx Ground and approximately 26 to 27 percent on UPS Ground. On a $15 base rate shipment the fuel surcharge alone adds $4.05. At 500 shipments per month it adds $2,025 per month in fuel charges before any other surcharge is calculated.

Most sellers treat the fuel surcharge as an unavoidable background cost and do not track it separately. Sellers who understand how it is calculated can predict when it will move, which carrier charges more at current diesel prices, and what operational decisions reduce the fuel surcharge dollar amount without changing the number of shipments.

What a Fuel Surcharge Is and Why Carriers Charge It

A fuel surcharge is a variable fee that UPS and FedEx add to the base transportation charge on every domestic shipment. Carriers introduced fuel surcharges in the early 2000s when diesel prices became too volatile to absorb into fixed annual rate increases. Rather than repricing their entire rate structure each time diesel spiked they created a separate weekly mechanism that floated with fuel costs.

The surcharge is expressed as a percentage of your base transportation charge not as a flat dollar amount. This means larger packages with higher base rates pay more fuel surcharge in absolute dollars even though the percentage is the same across all package sizes.

The fuel surcharge applies to virtually every UPS and FedEx domestic shipment. It is not optional. It is not waivable for individual shipments. It loads automatically on every label and appears as a separate line item on your invoice. For sellers who receive consolidated weekly invoices from UPS or FedEx the fuel surcharge line item is often where the biggest surprise appears because the invoice week may reflect a different fuel rate than the week you bought the labels.

For a complete map of every surcharge line item that appears on a UPS or FedEx invoice and what each one means see the UPS and FedEx Invoice guide. Size-based accessorials: Calculate your fees →

How UPS and FedEx Calculate the Fuel Surcharge

Both carriers use the same underlying data source but apply different tables and update on different days.

The data source: EIA diesel price index

Both UPS and FedEx base their ground fuel surcharge on the US national average on-highway diesel price published weekly by the US Energy Information Administration. The EIA publishes this price every Monday. Both carriers then apply their own published rate tables to convert that diesel price into a surcharge percentage.

The FedEx fuel surcharge table as of September 7 to 13 2026 at diesel prices in the $5.53 to $5.62 per gallon range is 27.00 percent of the base transportation charge. You can view the current FedEx surcharge table and the EIA diesel price index it references at the FedEx fuel surcharge page which updates every Wednesday with the rate effective that week.

The EIA publishes the weekly diesel price data that both carriers use at eia.gov/petroleum/gasdiesel every Monday afternoon. Checking this page on Monday gives you advance notice of what the fuel surcharge will be when FedEx updates Wednesday and when UPS updates the following Monday.

The update cycle:

UPS updates its fuel surcharge every Monday using the prior week’s EIA diesel price.
FedEx updates its fuel surcharge every Wednesday using the prior week’s EIA diesel price.

There is a one-week lag between when the EIA publishes the diesel price and when the new surcharge takes effect. In a rapidly rising fuel environment this lag means sellers pay the prior week’s surcharge for an extra billing cycle before any increase is reflected. In a falling fuel environment the lag works in the same direction: the surcharge stays higher for an extra week before it drops.

The calculation formula:

Fuel surcharge dollar amount equals base transportation charge multiplied by the current fuel surcharge percentage.

At a 27 percent surcharge rate:
A $10.00 base rate shipment pays $2.70 in fuel surcharge
A $15.00 base rate shipment pays $4.05 in fuel surcharge
A $20.00 base rate shipment pays $5.40 in fuel surcharge

The fuel surcharge is then applied before several other accessorials are calculated. On FedEx shipments the fuel surcharge also applies to residential delivery surcharges, additional handling surcharges, and delivery area surcharges on top of the base rate. The fuel surcharge effectively taxes the base rate and most accessorials simultaneously.

The 2026 Fuel Surcharge Table Changes That Made Things Worse

UPS and FedEx both raised their fuel surcharge tables multiple times in 2026 independent of diesel price movements. This is the detail most sellers miss. The surcharge has two components: the diesel price and the table that converts that price to a percentage. Both can move and both moved in 2026.

FedEx raised its surcharge table by 1.5 percent effective December 1 2025.

UPS raised its surcharge table by 1 percent effective January 5 2026. UPS then raised it again by an additional 1 percent effective March 9 2026.

UPS then restructured its table on April 13 2026. The restructuring widened the intervals between price bands in the table. Under the previous table the surcharge dropped by 0.25 percent for every $0.09 change in diesel prices above $3.55 per gallon. The April 2026 restructuring pushed that threshold up to $4.45 per gallon. Below $4.45 the surcharge now changes more slowly as diesel falls. Above $4.45 the mechanism is similar to before.

The practical effect: when diesel prices fall from high levels the UPS fuel surcharge comes down more slowly than it went up. Sellers who experienced surcharges rising quickly when diesel spiked will see them decline more slowly on the way down.

The UPS and FedEx surcharge tables crossed at approximately $4.75 per gallon diesel in June 2026. Below $4.75 FedEx has historically charged more on ground fuel. Above $4.75 UPS charges more. With diesel currently above $5.50 per gallon UPS runs slightly higher than FedEx on ground fuel at most price points in the current range.

For the current carrier rate comparison including fuel surcharge impact by weight and zone see the Monthly Carrier Rate Analysis which is updated at the start of each month.

USPS – Different Structure Same Impact

USPS has operated without a fuel surcharge for its entire history. The agency builds fuel costs into its base rate structure and adjusts through the rate-setting process rather than through a weekly surcharge mechanism. USPS’s January 2026 rate increase of 7.8 percent and the April 26 2026 temporary 8 percent surcharge both reflect fuel cost absorption that UPS and FedEx handle through the weekly surcharge mechanism instead.

The April 26 2026 USPS temporary surcharge is not the same structure as the UPS and FedEx fuel surcharge. The USPS surcharge is:
A flat 8 percent of the competitive package rate not a percentage of base transportation charge
Applied to packages only not to letters or flats
Effective April 26 2026 through January 17 2027
Driven by the extraordinary diesel spike to $5.37 per gallon in early 2026 which USPS described as the trigger for its first-ever fuel surcharge

Even with the 8 percent USPS temporary surcharge USPS remains significantly cheaper on fuel than UPS and FedEx for most domestic parcel shipments. USPS charged no residential delivery surcharge, no delivery area surcharge, and its flat 8 percent temporary fuel surcharge is roughly one-third of what UPS and FedEx charge at current diesel prices.

The Dollar Impact at Volume – What Fuel Is Actually Costing You

The fuel surcharge does not feel expensive on any individual shipment. It is the aggregate that damages margin. Here is what 27 percent fuel surcharge costs at different monthly volumes.

Seller shipping 200 orders per month at $12 average base rate:
Fuel surcharge per shipment: 27% of $12 = $3.24
Monthly fuel surcharge total: $3.24 x 200 = $648

Seller shipping 500 orders per month at $15 average base rate:
Fuel surcharge per shipment: 27% of $15 = $4.05
Monthly fuel surcharge total: $4.05 x 500 = $2,025

Seller shipping 1,000 orders per month at $18 average base rate:
Fuel surcharge per shipment: 27% of $18 = $4.86
Monthly fuel surcharge total: $4.86 x 1,000 = $4,860

At 1,000 shipments per month fuel costs nearly $5,000 per month at current surcharge rates. Annually that is $58,320 spent purely on the fuel surcharge component of carrier costs. This is not the total shipping cost. It is one line item.

The fuel surcharge also compounds with DIM weight. Because the surcharge is a percentage of base rate and DIM weight inflates the base rate sellers who are being billed on dimensional weight instead of actual weight pay 27 percent of a higher number. A package with a $10 actual weight base rate that bills at $15 DIM weight base rate pays $4.05 in fuel surcharge instead of $2.70. Every pound of excess DIM weight adds fuel surcharge on top of the base rate difference.

Reducing the box size to lower DIM weight reduces the base rate which reduces the fuel surcharge proportionally. Use the DIM Weight Calculator to check your billable weight on your standard box before comparing how a smaller box affects both the base rate and the fuel surcharge simultaneously.

How to Reduce Your Fuel Surcharge Exposure

The fuel surcharge cannot be eliminated entirely on UPS and FedEx shipments. But its impact can be reduced through four strategies.

Strategy 1: Route fuel-sensitive shipments to USPS.

USPS charges no residential delivery surcharge and its temporary 8 percent fuel surcharge is significantly lower than UPS and FedEx at current diesel prices. For lightweight packages under 2 lbs going to residential addresses USPS already wins on total cost because of the residential surcharge difference. The fuel surcharge gap makes USPS even more competitive relative to UPS and FedEx for this shipment profile.

Strategy 2: Reduce DIM weight to lower the base rate the surcharge applies to.

The fuel surcharge is a percentage of base rate. Reducing base rate reduces fuel surcharge proportionally. The most effective way to reduce base rate on UPS and FedEx is to reduce DIM weight by right-sizing packaging. A package that moves from a $18 base rate DIM-billed to a $14 base rate saves $1.08 in fuel surcharge per shipment at 27 percent in addition to the $4 base rate saving.

Strategy 3: Shift volume to commercial addresses where possible.

Residential delivery surcharges and delivery area surcharges both compound with the fuel surcharge. Commercial deliveries avoid the residential surcharge and may avoid DAS depending on the ZIP code. The fuel surcharge still applies to commercial deliveries but the compounding effect of residential and DAS on top of fuel makes residential delivery meaningfully more expensive per shipment.

Strategy 4: Monitor the EIA diesel price weekly and model surcharge changes proactively.

The fuel surcharge changes every week. At current diesel prices near $5.85 per gallon a $0.09 drop in diesel moves the FedEx surcharge by 0.25 percentage points. For sellers shipping 1,000 units per month at $15 average base rate each 0.25 percentage point drop saves $37.50 per month. Monitoring diesel weekly takes five minutes and identifies when the surcharge has moved enough to revisit carrier routing decisions.

Use the Carrier Savings Engine to compare all-in costs across UPS, FedEx, USPS Ground Advantage, and USPS Cubic on your specific package dimensions and destination zone. The engine applies 2026 verified commercial base rates and shows which carrier is cheapest for your exact shipment profile before you print a label.

For sellers who want live rate comparison including current fuel surcharge at the time of label purchase use Shippo which shows all-in carrier costs including applicable surcharges at the time you enter the destination address. No monthly fee. Fuel surcharge is built into the displayed rate not added as a post-delivery surprise.

FAQ

Q: What is a fuel surcharge on UPS and FedEx?
A: A fuel surcharge is a variable fee that UPS and FedEx add to the base transportation charge on every domestic shipment. It is expressed as a percentage of your base rate and changes every week based on the national average on-highway diesel price published by the US Energy Information Administration. At current September 2026 diesel prices the FedEx Ground fuel surcharge is 27.00 percent of base rate effective September 7 through September 13 2026. UPS Ground runs at a similar rate. The surcharge appears as a separate line item on your carrier invoice and is not optional or waivable on individual shipments.

Q: How is the UPS and FedEx fuel surcharge calculated?
A: UPS and FedEx both use the US national average on-highway diesel price published weekly by the US Energy Information Administration as their index. Each carrier applies its own published rate table to convert the diesel price into a surcharge percentage. UPS updates its surcharge every Monday based on the prior week’s EIA price. FedEx updates every Wednesday based on the prior week’s EIA price. There is a one-week lag between when the EIA publishes the diesel price and when the new surcharge takes effect. The surcharge dollar amount equals your base transportation charge multiplied by the current surcharge percentage. At a 27 percent rate a $15 base rate shipment pays $4.05 in fuel surcharge.

Q: Does USPS charge a fuel surcharge?
A: USPS added a temporary 8 percent fuel surcharge effective April 26 2026 running through January 17 2027. This applies to packages only not to letters or flats. Before April 26 2026 USPS had never charged a separate fuel surcharge in its history. Even with the 8 percent temporary surcharge USPS fuel costs are significantly lower than UPS and FedEx which run 26 to 27 percent at current diesel prices. USPS also charges no residential delivery surcharge and no delivery area surcharge making it substantially cheaper than UPS and FedEx for lightweight residential shipments even after the temporary fuel surcharge is included.

Q: How can I reduce the fuel surcharge I pay on shipping?
A: Four strategies reduce fuel surcharge exposure. First route lightweight residential shipments to USPS where the combined fuel and residential surcharge cost is significantly lower than UPS or FedEx. Second reduce dimensional weight by right-sizing your packaging since the fuel surcharge is a percentage of base rate and lower DIM weight means a lower base rate and a proportionally lower fuel surcharge. Third shift commercial deliveries to avoid the residential surcharge compounding with the fuel surcharge. Fourth monitor the EIA weekly diesel price every Monday since the surcharge changes weekly and routing decisions can be adjusted when the surcharge moves enough to change the cheapest carrier for a given weight and zone.

RATES VERIFIED STAMP:

Rates verified September 2026. FedEx Ground fuel surcharge of 27.00 percent effective September 7 to 13 2026 confirmed directly from FedEx official fuel surcharge page at fedex.com. FedEx surcharge table effective June 1 2026 confirmed from FedEx official documentation. UPS Ground fuel surcharge rate range of 25 to 27 percent confirmed from multiple carrier rate sources at current 2026 diesel prices. UPS surcharge table raise of 1 percent effective January 5 2026 and March 9 2026 confirmed. UPS table restructure effective April 13 2026 confirmed from Warpspeed carrier analysis. UPS Monday update cycle and FedEx Wednesday update cycle confirmed from multiple sources. EIA national on-highway diesel price as the index for both carriers confirmed from FedEx official fuel surcharge documentation and UPS rate documentation. US average retail diesel $5.85 per gallon as of September 3 2026 confirmed from EIA today in energy page. USPS 8 percent temporary surcharge effective April 26 2026 through January 17 2027 confirmed. See changelog.