Additional handling — weight
Applies when a single package exceeds 50 lbs actual weight. Triggering any additional handling charge also applies a 40 lb minimum billable weight.
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Shipping large boxes: every fee that can hit one.
A big box rarely gets charged once. It picks up a stack of accessorials, each with its own threshold and its own zoned rate, and the total routinely exceeds the transportation charge. This page lists every fee in that stack and lets you price them on a box you actually ship.
Start here
First, you may not be billed for the weight you think
Before any surcharge applies, carriers decide what weight to bill. For a large box that is usually not what the scale says.
Carriers calculate a dimensional weight from the box's volume — length × width × height, divided by a number called the dimensional divisor (139 is the standard retail figure). Whichever is higher, the scale weight or the dimensional weight, is what you pay for.
A 30 × 24 × 20 in carton holds 14,400 cubic inches. Divided by 139 that is a dimensional weight of 104 lbs. If the box actually weighs 28 lbs, you are billed for 104. That is the single largest cost driver on most large boxes, and it happens before a single surcharge is added.
Dimensional weight has its own page
Including a calculator that lets you test your own boxes against every divisor from 139 to 500, and see what a better divisor would be worth.
Potential other charges — domestic
The six fees that hit large boxes
Short definitions here. Each one is covered in full, with the thresholds and the negotiation angle, on the additional handling page.
Additional handling — length
Applies when the longest side exceeds 48 in. The most common trigger for anything shipped in a long carton.
Additional handling — girth
Applies when length plus girth exceeds 105 in. Girth is twice the width plus twice the height, so a box can pass this without any single side looking unusual.
Additional handling — packaging
Applies when the item is not fully encased in corrugated cardboard — wrapped, banded, canvas, wood or metal exteriors all qualify.
Large package / oversize
Applies when length plus girth exceeds 130 in. Called Large Package by UPS and Oversize by FedEx. It supersedes additional handling rather than adding to it.
Over maximum limits
Applies over 150 lbs, over 108 in in length, or over 165 in length plus girth. Both carriers charge $1,950. This is the worst fee on the list and the hardest to dispute.
Calculator
Price the fee stack on your own box
Enter a box you actually ship. The calculator applies the published domestic rates for the destination zone, shows which thresholds it crosses, and lets you apply a discount to see what a negotiated agreement is worth.
Your shipment
Length × Width × Height
Every one of these fees is separately negotiable. Drag to see what a discount is worth on this box.
Accessorial charges on this box
Read the fees in full
Each charge above has a longer explanation, including where it is negotiable and where it is not.
Send us an invoice with a few large boxes on it.
We will price the accessorial stack at published rates, show you what your agreement should be delivering, and flag any box that belongs on freight instead.