How to Find the Work Your 3PL Does and Never Bills For

Some 3PL billing errors never show up as a wrong rate or a disputed charge. The invoice simply leaves out work your team did.

Suppose your team completes 1,400 relabel tasks for a client. The contract includes a relabel fee, but the invoice lists only receiving and storage. Finance checks those lines against the rate card and sends the bill. The relabel charge never gets checked.

Billing rules often get set up during 3PL client onboarding. After launch, a client asks for different labels or extra handling, and the team finds a way to do it. Updating the billing setup is a separate job. Someone has to own it.

Why 3PL billing errors survive an invoice check

An invoice review starts with the charges on the bill. Finance checks the rates, quantities, and calculations. That catches mistakes in those lines, but it leaves a question unanswered. Did you bill for all the work the contract covers?

APQC includes error-free invoice line items in its customer credit and invoicing assessment. That's a useful accuracy check. Finding missing charges also means comparing the invoice with completed work and the contract.

In WMS-driven billing, a charge usually starts with a recorded activity, such as a receipt or a relabel task. No record means nothing for that rule to price. A manual entry or separate billing system can capture the work too. Someone still has to record it against the right client.

Five places billable work gets missed

Start with how the team records and prices the work. These are five places to check.

• Work with no WMS record. A lead asks for relabeling or rework at a bench, and the team does it outside a WMS task. Finance needs a record of it. Without one, the work can be missing from both the transaction report and the bill.
• Adjustments that bypass a charge. A supervisor uses a quantity adjustment or a directed-task override to finish the work. That transaction may bypass the expected billing rule. Check what actually posted.
• Missing charge rules. The contract lists a fee. The WMS records the work, but nobody has connected that transaction type to a billing rule. The invoice leaves it uncharged.
• Different billing units. The team counts license plates, while the contract bills per receipt. Both counts could be right. Check the agreed unit before treating the difference as missing revenue.
• New work with no agreed rate. A client adds kitting, returns processing, or labeling after launch. The rate card never gets updated. You'll need to agree on a rate with the client before setting up the charge.

When a billing review is worth the time

Check the contract before changing anything. Some clients pay an all-inclusive rate, or their contract includes a set amount of relabeling. An account manager may also have approved a temporary waiver. Keep those decisions somewhere finance can find them.

Small fees deserve some judgment too. A $0.25 fee on a few hundred transactions may cost more to explain and collect than it brings in. Leaving work unbilled can be a reasonable business decision. Write down who approved it and why.

Start with clients whose work has changed since launch. Accounts with several accessorial charges, or different rates for similar work, also give you more to check. A flat-rate account with little extra handling may be a lower priority.

Allow a few hours from finance and operations for a first pass, assuming the exports and rate card are usable. The floor can keep running. The review can also uncover overbilling, which is worth catching before a client does.

How to reconcile WMS activity with a 3PL invoice

Choose one client and a closed billing month. Have finance and operations work through it together. Finance knows what each invoice line covers; operations knows what the WMS task names mean and how people use them.

Pull the client's completed transactions and group them by task type. Put the counts beside the invoice and rate card. For each activity, check whether it was charged, which billing unit applies, and what rate the contract allows.

Use the same cutoff dates. Remove cancelled tasks and reversals, then check for credits or charges included in another line. Some work may appear on the next invoice. A timing difference can look like missing revenue if you compare the wrong periods.

Ask a floor lead about work done by hand. Relabeling at a bench may never appear in the WMS export. Find the log, request, or other record the team uses, and check whether finance received it.

Then put a value on the largest unexplained gaps. In our example, 1,400 billable relabels at $0.40 each would mean $560 for that month. Confirm the completed quantity and any included allowance before calling it a missed charge.

The example below shows how recorded work can be missing from an invoice.

A difference in the counts is a reason to investigate. Check the contract and billing records before changing a rule or raising a charge with the client. The work may already be covered.

If you find gaps, repeat the comparison for the next few monthly billing runs. Check whether the same problem returns. Once the results are consistent, quarterly checks may be enough, with another review when a client's work or rates change.

Fix the gap before the next billing run

Give each confirmed gap an owner and a specific fix. That might mean connecting a task to a charge rule, correcting a billing unit, or agreeing on a rate for new work. Then test the next bill.

For off-system work, decide who records it and how finance receives that record. Keep it simple enough for the team to use. A billing rule can't help with work nobody recorded.

One client and one month is a manageable start. Find a charge you can trace back to completed work and an agreed rate, then make sure the next billing run captures it.