The 3PL invoice fees that recur every month

“Every month I find the same $300 mistake on our 3PL invoice. They’re still surprised when I catch it.” That line came from an e-commerce operator in a public logistics forum in 2026, and it drew more agreement than almost anything else we read while researching what brands actually complain about. The number changes. The pattern does not.

A fulfilment invoice is a long list of small unit charges multiplied by large quantities, priced off a rate card that was agreed once and has been quietly amended since. That structure is why the same fee drifts every month, and why nobody has time to catch it.

The fees that drift

Storage. Billed per pallet, per bin or per cubic foot, and recalculated when the count is taken. Check which day the count was taken, whether inbound stock still on the dock was counted as stored, and whether the rate moved at the anniversary without a notice.

Pick and pack. A per-order charge plus a per-unit charge, usually with a minimum. Check the order count against your own platform’s order count for the month, and the unit count against units shipped. Multi-unit orders billed as multiple orders is a common one.

Packaging materials. Boxes, mailers, dunnage and tape, charged per order or per unit. Check the unit price against the rate card and whether a “packaging” line appears on orders that shipped in the product’s own carton.

Shipping markup. The carrier’s charge plus a percentage or a per-label fee. Check the base against the carrier’s own invoice or the negotiated rate, and look for surcharges passed through twice.

Receiving. Per pallet, per carton or per unit, plus a charge for non-compliant inbound. Check which inbound was actually non-compliant and against what rule.

Returns processing. Per unit inspected, restocked or disposed of. Check that returned units were actually restocked, since a unit charged for restocking and then charged for storage should show up in inventory.

Minimums and surcharges. Monthly account minimums, peak season surcharges, special project hours. Check the trigger for each, and the dates.

Why it lands on you

The 3PL’s billing system produces the invoice from its own counts. Nobody on their side reconciles it to your platform, your rate card or your inventory, because that is not their job. It is yours, and it takes a full day a month done by hand, so it gets done quarterly, or once, or never. One brand described discovering a $27,000 billing surprise from a 3PL of ten years. Another asked whether 16 to 20% of net sales was normal for a boutique 3PL. Neither had a reconciliation running.

How to reconcile a 3PL invoice in an hour

1. Export the month’s orders, units and inbound from your own platform.
2. Put the rate card next to the invoice and match every line to a rate. A line with no rate on the card is a question.
3. Multiply your own counts by the card rates and compare to the invoice, line by line.
4. Write the differences down with the evidence, and send them before the next invoice cycle.
5. Keep the sheet. Next month takes twenty minutes, because the drifting lines are the same ones.

Or hand it to us. The outsourced freight audit desk reconciles carrier and 3PL invoices every week against your contract and rate card, and disputes what does not match. Send one invoice to see what a line-by-line pass turns up.