Field Note / Logistics

What is accessorial leakage, and how do you stop it?

Most 3PLs obsess over the line-haul rate and ignore the place the margin actually leaks: accessorials. The detention, the lumper fee, the layover, the reweigh. Small charges, buried in the paperwork, spread across hundreds of loads. Individually they look like rounding errors. Added up, they are the difference between a healthy quarter and a flat one.

Accessorial leakage is the revenue a logistics company loses when accessorial charges (detention, lumper, layover, reweigh, fuel, and similar fees) are either not billed to the customer or not recovered correctly. It happens because accessorials are high-volume, arrive late, and depend on rules that live in someone's head.
Why it leaks

Money leaks in two directions at once.

01

You underbill your customer

A driver sat for three hours, the detention was real, but nobody captured it before the invoice went out. That charge is gone.

02

You overpay your carrier

A carrier bills an accessorial that never happened, or bills it twice, and at volume nobody catches it.

03

The structure is against you

Accessorials are a large share of the money, they arrive on a delay, and the rules are tribal.

15-30%
Accessorials add to a freight bill, and unmanaged, eat 15 to 20% of total freight cost
ZDS, Nuvizz
50%
Accessorials can be up to half of a carrier's revenue
Nuvizz
5-7%
Of transportation spend lost to freight audit and pay inefficiency
Supply Chain 247 / Capgemini

The timing makes it worse: accessorials are often invoiced weeks after a shipment closes, landing in a different accounting period than the revenue they belong to, so they never get reconciled.

How you stop it

You do not fix this with a stricter spreadsheet.

You stop it by capturing the rules once and checking every load against them automatically.

01

Write the rules down

Which accessorials apply to which customers and lanes, and what each is worth. This is the tribal knowledge that currently lives in one person's memory.

02

Capture the trigger

Detention, layover, and reweigh have to be caught at the event, not reconstructed at month-end.

03

Match every load both ways

Check what you should have billed the customer, and check what the carrier billed you, against the same ruleset.

04

Flag and route

Surface the misses with the dollar impact attached, so a human acts on real exceptions instead of hunting for them.

That is precisely what an AI agent is good at: reading the documents, applying the rules, and flagging what is off. It is the same engine behind carrier invoice auditing.

The takeaway

It is not a discipline problem. It is a volume problem.

The rules are knowable, the charges are real, and there are simply too many of them for a person to catch by hand. Encode the rules, check every load, and the margin you were leaking comes back.

FAQ

Frequently asked questions.

They are related. Overbilling is when a carrier charges you for an accessorial that is wrong or duplicated. Leakage is the broader problem, and it includes the accessorials you could have billed your customer but did not.

Stop the leak, keep the margin.

Flat fee, live in days. Rigby encodes the rules and checks every load, both directions.

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