How to Read an LTL Freight Invoice, Line by Line

To read an LTL freight invoice, work top down in the order the rating engine built it: the header identifies the shipment, the rated line prices the freight (class times weight at a rate per hundredweight), the discount comes off that, the minimum charge sets a floor, fuel applies as a percentage, and accessorials attach last. Every number on the bill is the output of one of those six steps. Audit it by rebuilding the same sequence from your own documents and seeing where the two versions diverge.

That is the whole method. What makes LTL harder than truckload is that you did not agree to the final number in advance. You agreed to inputs: a class-based tariff, a discount, a fuel table, an accessorial schedule. The invoice is the carrier’s arithmetic on those inputs, and arithmetic on inputs is where errors live.

This post walks an invoice of realistic shape, top to bottom. The dollar figures below are illustrative, chosen to make the math legible, not drawn from any real shipment or carrier tariff.

The header block: what the bill is required to show

Before you look at a single dollar, check that the bill identifies the shipment well enough to be auditable. That is not a preference, it is a floor set by rule. Under 49 CFR 373.103, a freight or expense bill must show the names of consignor and consignee, the shipment date, origin and destination, the number of packages, a description of the freight, weight or volume or measurement, the exact rate assessed, the total charges due with the nature and amount of each charge, the route and each participating carrier, transfer points, and the address where payment is remitted.

On an LTL bill the practical header fields are:

• PRO number, the carrier’s tracking number for the shipment. Your primary key for everything downstream.
• BOL number and shipper reference / PO, your keys.
• Pickup date and delivery date. The pickup date determines which version of your pricing agreement and which fuel table apply.
• Origin and destination, full addresses, not just city and state. Address determines residential, limited access and delivery area treatment.
• Terms: prepaid, collect, or third party. This decides who the carrier can lawfully pursue.
• Pieces, packaging type, and declared weight.
• NMFC item number and class.

If the NMFC item number is missing and only a class appears, ask for it. The item number is what makes a reclass argument checkable; a bare class number is an assertion.

The rated line: class, weight break, and rate per hundredweight

This is the line that carries most of the invoice, and it is built from three inputs multiplied together.

Class. Under the NMFC, class reflects four transportation characteristics: density, handling, stowability and liability. After NMFTA Docket 2025-1, issued January 30, 2025 and effective Saturday, July 19, 2025, more items sit on one standard density scale where handling, stowability and liability are not concerns. If your BOL declares a class and the carrier’s dimensioner measures a different density, expect a reclass line and check it rather than assuming it is wrong.

Weight. The billed weight is whatever the carrier’s scale or dimensioner recorded, which may differ from your BOL. A reweigh is legitimate. A reweigh with no certificate, no scale ticket, and no notice is a request waiting to be made.

Rate. LTL base rates are quoted per hundredweight (per 100 pounds, abbreviated CWT) and step down as weight rises. Those steps are weight breaks. Because the rate falls faster than the weight rises at a break point, a shipment just under a break can rate higher than the same shipment at the break weight. Correct rating bills the lower of the two, sometimes shown as “deficit weight” or “bumped” rating. Not every engine does it, and it is one of the few LTL checks that can be worth real money on a single bill.

So the rated line in our illustrative example:

Class 85, 1,000 lbs, base rate $86.40 per CWT
10 CWT x $86.40 = $864.00 gross linehaul

The discount line and the minimum charge

Almost nobody pays LTL base tariff rates. Your pricing agreement gives a percentage discount off the base, often varying by lane, by class, or by origin and destination region.

Gross linehaul                 $864.00
Less discount, 65%            ($561.60)
Net linehaul                   $302.40

Three things to verify on this line.

1. Is the discount the one in your current agreement, for that lane, at that class, on that pickup date? Discounts are frequently lane-banded, and a lane that falls just outside a band gets a lower discount correctly.
2. Which base tariff did the discount apply to? A 70 percent discount off a higher base can be worse than a 60 percent discount off a lower one. If your agreement names a base tariff and its effective date, the invoice should be reproducible from it.
3. Did the minimum charge cut in? Every LTL agreement has an absolute minimum charge, the floor below which a shipment will not be billed regardless of what the rating produces. In the example, if the AMC were $185.00, the discounted $302.40 stands. If the discounted result had come to $150.00, the bill should read $185.00, not $185.00 plus $150.00. Minimum charges replace the rated amount; they do not add to it. That error is rare but it is unmissable once you look for it.

The fuel surcharge line, and the base it applies to

LTL fuel surcharge is normally a percentage, published in the carrier’s fuel table and indexed to the weekly national average diesel price. The index itself is public: the EIA On-Highway Diesel Fuel Price Survey collects the cash self-serve pump price including taxes from 590 retail outlets as of 8:00 a.m. local time Monday and publishes around 10:00 a.m. ET Tuesday, or Wednesday when Monday is a government holiday.

The audit question is not usually the percentage. It is what the percentage multiplies.

Fuel surcharge, 28.5% of NET linehaul:  $302.40 x 0.285 = $86.18
Fuel surcharge, 28.5% of GROSS linehaul: $864.00 x 0.285 = $246.24

That is a $160.06 difference on one small shipment, from an identical percentage. Which one is right depends entirely on your agreement and the carrier’s rules tariff. Many LTL agreements apply fuel to the discounted linehaul; some apply it to the gross. Neither is an error by itself. Billing it one way when the agreement says the other is.

Two related checks. First, whether accessorials are inside or outside the fuel base, since some carriers apply fuel to certain accessorials. Second, which week’s index the percentage came from, because the effective-date convention varies by carrier. That question is worked through for truckload in which DOE index week applies to your fuel surcharge, and the logic transfers directly.

The accessorial lines

Accessorials attach after the rated freight charges. On LTL they are drawn from the carrier’s rules tariff, and the common ones map to the standard practitioner taxonomy of accessorial charges: liftgate, residential delivery, inside delivery, limited access, notification or appointment, redelivery, sort and segregate, reweigh, reclassification, storage, and detention of the delivering vehicle.

Every accessorial asserts that a condition existed at the shipment. The audit is: name the condition, find the shipment document that describes it, then check whether the charge was authorized. That two-document pattern is worked end to end in disputing a liftgate fee on a dock-to-dock delivery, and it applies to every line in this section.

For our example, two accessorials:

Liftgate, delivery                  $85.00
Delivery notification / appointment $25.00

The whole invoice, annotated

Putting it together. Again, illustrative figures.

Check the addition yourself every time, because it takes four seconds: 302.40 plus 86.18 plus 85.00 plus 25.00 is 498.58. Totals that do not foot are rarer than they used to be, but re-rated invoices and manually adjusted bills still produce them.

The four LTL lines that most often bill wrong

In rough order of how often they are worth chasing:

1. Reclassification. The carrier’s dimensioner measured different dimensions than your BOL declared and moved the shipment to a higher class. This is legitimate when the freight really was different. It is contestable when the reading is wrong, when the item number chosen does not match the commodity, or when the carrier cannot produce the measurement record. Ask for the dimensioner reading, the date and time, the terminal, and the NMFC item applied. After the 2025 density restructure, more of your freight is exposed to this line than before, and it is worth sampling monthly rather than annually.

2. Reweigh. Same shape, different input. The carrier reweighed and rebilled. Ask for the certified scale ticket with weight, date, time and location. A reweigh with no ticket is not evidence, it is a number.

3. Accessorials added at billing. Liftgate on a dock delivery, residential on a commercial address, limited access on a site that does not match any category enumerated in the carrier’s own tariff. These are added by rules engines reading an address, not by anyone who saw the stop.

4. Wrong discount or wrong effective date. The least visible and the most systematic. One lane banded incorrectly, or an agreement renewal applied a week late, quietly changes hundreds of invoices. You will never catch it invoice by invoice; you catch it by re-rating a sample and comparing.

Note what is not on this list: the base rate. Base tariff rates are stable and applied mechanically. Chasing them is usually wasted effort compared to the four lines above.

Timing: how long you have, and how long the carrier has

An LTL correction cycle can run months, so the clocks matter.

Under 49 CFR 377.205, a carrier must present its freight bill within 7 days of receiving the shipment on prepaid traffic, or within 7 days of delivery on collect, and the bill must state the credit time limit, the late-payment penalty, the service or collection charge, and any discount terms. Under 49 CFR 377.203, the standard credit period is 15 days beginning the day after presentation of the bill, extendable by published tariff to no more than 30 calendar days.

Balance-due bills, which is what a reclass or reweigh rebill is, run against 49 U.S.C. 13710: a carrier must bill charges additional to those originally billed within 180 days of your receipt of the original bill to preserve its collection rights, and you must contest a bill within 180 days of receipt to preserve your right to challenge it. If you have already paid and you are seeking money back, that is an overcharge claim, and under 49 CFR 378.8 the processing carrier must pay, decline or settle a written overcharge claim within 60 days of receipt absent a written agreement to extend.

All of these clocks in one place: the freight billing deadlines reference.

The reading checklist

Work an LTL invoice in this order and you will not miss a line.

1. Match PRO, BOL and PO to your own records. Confirm the shipment is yours and was not already billed. A rebill under a new invoice number on the same PRO is the classic false positive in duplicate freight invoice detection.
2. Check pickup date against the effective date of your pricing agreement and fuel table.
3. Compare billed class and NMFC item to the BOL. Flag any reclass line and request the measurement record.
4. Compare billed weight to the BOL. Flag any reweigh line and request the certified scale ticket.
5. Recompute the rated line: weight in CWT times base rate, then run the weight-break test one break up.
6. Apply the contracted discount and compare to the invoice’s net linehaul.
7. Compare the result to the absolute minimum charge. Confirm the minimum replaced rather than added.
8. Recompute fuel: correct percentage, correct index week, applied to the base your agreement names.
9. For every accessorial, name the condition asserted, find the document describing it, and check authorization.
10. Foot the invoice.
11. If any line reads as an undescribed code with no explanation, request itemization under 49 CFR 373.103 before disputing anything else.

The comparison view for the other modes is in why the same shipment bills differently by mode, and the truckload equivalent of this walkthrough is reading a truckload carrier invoice line by line.

Most of what you find will not be anyone’s bad faith. LTL rating is thousands of automated decisions a day against inputs supplied by shippers, dimensioners and address databases, and a process that runs at that volume produces artifacts. The job is to catch them consistently, not to assign blame.

Sources

• 49 CFR 373.103, Freight or expense bills (Cornell LII)
• 49 CFR 377.203, Credit period and late payment charges (Cornell LII)
• 49 CFR 377.205, Presentation of the freight bill (Cornell LII)
• 49 CFR 378.8, Overcharge claim resolution within 60 days (Cornell LII)
• 49 U.S.C. 13710, Billing and contesting windows (Cornell LII)
• NMFC class determination: density, handling, stowability, liability (NMFTA)
• Guide to the NMFC changes effective July 19, 2025 (NMFTA)
• EIA On-Highway Diesel Fuel Price Survey methodology (U.S. Energy Information Administration)
• Top 20 accessorial charges, practitioner taxonomy (Zipline Logistics)