The Fuel Surcharge Stopped Being About Fuel

Tim Meester

September 18, 2026

This week diesel set an all-time record. The DOE national average hit $6.285 a gallon for the week of September 14, up 32 cents in seven days, past the June 2022 peak that everyone in this industry treated as the ceiling.

So this is a terrible week to argue that fuel surcharges are no longer correlated to the fuel market.

Let’s argue it anyway. FedEx’s posted ground fuel surcharge is 28.00%. Run that number backwards through the table FedEx published in 2018, using the step rule FedEx printed on that same table, and you need diesel at $10.66 a gallon to get there.

Five numbers, then three moves.

Every figure comes from the carriers’ own published documents or from DOE. These are the conclusions. The reasoning behind them is in the full piece, and you’ll want that before you take any of this into a negotiation.

1. Same fuel price, 2.6 times the surcharge. At $3.55 to $3.64 diesel, FedEx Ground charged 8.25% under the September 2018 table and 21.50% under the December 2025 one. Identical fuel price, identical service.
2. Record diesel still doesn’t justify the current rate. Diesel hit an all-time high of $6.285. The 2018 table, extended by FedEx’s own rule, charges 15.75% there. The posted rate is 28.00%.
3. The table is three times steeper going up than coming down. Above the $4.45 anchor the range extends in $0.09 steps, below it in $0.27. A dollar of diesel costs you 2.78 points; a dollar of relief returns 0.93.
4. Your fuel line grew about six times over. On a 5 lb ground residential parcel the fuel charge went from $1.04 in 2020 to $7.21 in 2026 at list. Fuel prices explain 18% of that. Table re-basing is 44%, base and accessorial inflation 38%.
5. Their own fuel bill went down. FedEx fuel expense fell from 5.58% of revenue in FY2019 to 4.28% in FY2026, and has never exceeded about 7% of either carrier’s operating cost. Put that next to a 28% surcharge.

Three moves, in this order.

1. Pin the dated table in your agreement. A cap or points off helps, but neither stops a re-base. Name a dated table in the agreement and hold it for the term. Two structural re-bases landed in 2026 alone, and almost nobody is asking for this.
2. Go after the accessorial base. Fuel is charged on the net rate plus most surcharges, so at 28% every accessorial dollar costs you $1.28. Getting a carton under 10,368 cubic inches drops the additional handling fee and the fuel on it.
3. Audit the four weeks after every table change. UPS republished on January 5, March 9, April 13 and August 10 this year, and fuel errors cluster in those windows. Run the full population and check your dispute clock, which is probably 90 to 180 days.

Fuel surcharges are no longer about fuel. What was built as a pass-through now works as a profit lever for the national carriers. And because it’s charged as a percentage of a base that keeps inflating, the effect compounds rather than adds, which is why your fuel line has grown faster than your rates, faster than your accessorials, and several times faster than diesel.

One test settles it

There’s an argument the carriers make, and on its own terms it holds up. The index is real. It’s DOE data, published weekly, public, auditable. The lag is one week and they disclose it. Nobody is cooking the diesel number.

One thing to add to that concession, because it cuts the other way. The DOE series is a retail price. It’s what a truck pays at a public pump, with excise taxes and station margin in it.

That isn’t how a national carrier buys diesel. Line-haul fuel goes into company fueling facilities in bulk, contracted upstream and hedged, which puts the carrier’s cost basis on wholesale rather than at the pump. Wholesale carries neither the retail margin nor the same tax load, and retail is slower to fall than wholesale when spot prices drop.

So the price your surcharge is indexed to is not the price the carrier’s fuel bill is indexed to. Over a year the two track each other. Week to week, and especially on the way down, the shipper is carrying volatility the carrier has already engineered around.

Fuel surcharges are no longer about fuel.

What was built as a pass-through now works as a profit lever for the national carriers. And because it’s charged as a percentage of a base that keeps inflating, the effect compounds rather than adds, which is why your fuel line has grown faster than your rates, faster than your accessorials, and several times faster than diesel.

Now run it the other direction, at this week’s record price.

Diesel is $6.285. FedEx’s 2018 table, extended by FedEx’s own published rule of a quarter point per nine cents, produces a 15.75% ground surcharge at that price. The current posted rate is 28.00%.

The arithmetic is not in dispute. Only the table is.

Their fuel bill went down

FedEx’s fuel expense was 5.58% of revenue in fiscal 2019. In fiscal 2026 it was 4.28%. As a share of what it costs FedEx to move packages, fuel fell from 8.08% to 6.25%.

Fuel has never been more than about 7% of either carrier’s total operating cost. It sat under 5% in four of the last eight years. Hold that number next to a 28% surcharge and decide for yourself what the surcharge is recovering.