How to check 3PL invoice rates against your rate card

Why checking billed rates matters#

A wrong rate repeats on every unit and every invoice until someone checks it. On illustrative numbers, an additional-unit fee billed at $0.48 instead of $0.40 on 1,200 units costs $96 a month, or $1,152 over a year at the same volume.

Rates can drift through ordinary process gaps rather than intent. One warehouse-software vendor, writing for 3PLs in September 2026, describes a handling rate negotiated in March while "the rate card in the system still says January"¹. The problem isn't limited to logistics: a city government audit released in December 2018 found invoices approved for payment at prices above the negotiated contract price².

What rate verification checks, and what it leaves to other checks#

Rate verification checks whether each line's rate was right. Whether the quantity was right and whether the fee was allowed at all need their own checks.

In the invoices we review, common disputes come from scope rather than price: extra picks, inserts or kitting charged twice, and returns sorted into a higher-priced category. A line can pass the rate check and still be wrong, so treat rate checks as one step of How to audit a 3PL invoice, step by step.

What you need before you start#

You need the documents that set your rates, plus an invoice detailed enough to show quantities:

• Every signed version of the rate card (also called a rate sheet or fee schedule) and every amendment, each with its effective date and the warehouses it covers. Keep prior versions for checking older invoices and for disputes³.
• The fee definitions in the contract or statement of work (SOW); see Which document wins when they conflict (order of precedence).
• Any written rate-change notices.
• The invoice and its supporting detail, with quantity, unit and rate per line (The supporting detail files you should always request).

Among the brands whose invoices we review, not all have a copy of their current rate card, and rate changes sometimes reach them by email or not at all. If you don't have yours, ask the 3PL for it in writing.

How to check each billed rate, step by step#

You can check rates line by line in a spreadsheet, in seven steps.

1. Build a rate table from your card. List one row per fee, with its unit, its rate, the date it took effect and, if you use more than one of the 3PL's warehouses, the warehouse it covers, since rates can differ by site. Add volume thresholds if your card has tiers.

2. Match each invoice line to a card line. Invoice fee names can differ from the card's, so record each match once and reuse it. See Why 3PL invoices are hard to read: formats, codes and fee naming.

3. Work out the billed rate for every line that shows a quantity:

   Billed rate = line amount ÷ billed quantity

   A line combining two card rates (order fees with picks, or old and new rates) matches neither; ask for the split.

4. Use the card version in effect. The date that sets a rate can differ from the invoice date, as one freight-audit guide notes⁴. For orders, receipts and returns, a new rate usually applies to work done on or after its effective date; for storage, to the storage period or count date that starts after it; for monthly fees, from the next month. If your contract doesn't say which date applies, ask the 3PL and get the answer in writing.

5. Confirm the unit of measure and fee structure. A rate can match the card and still be applied to the wrong unit⁵, such as per unit instead of per order, or under the wrong pick structure.

6. Size the difference:

   Dollar impact = (billed rate − contracted rate) × billed quantity

   Allow for rounding first; small rounding differences can still start disputes⁶. When a card rate has more than two decimals or the quantity is fractional (cubic feet, a daily-average pallet count), the amount is rounded to the cent. Multiply the card rate by the billed quantity and round to the cent; if that equals the billed amount, the rate matches. For example, 1,234.567 cubic feet at an illustrative $0.45 is $555.56, a billed rate of $0.450004. If the gap is no bigger than rounding each day or unit could produce, ask how the 3PL rounds (per line, per day or per unit) before you call it a rate error.

7. Log what you can't check. List dollar-only lines, fees that aren't on the card and rates with no effective date. Ask the 3PL in writing for the missing quantity, unit or definition.

Fee by fee: where rate checks get tricky#

Each fee category has its own units and structures; check which ones your card uses.

Among Implentio customers' 3PL contracts where picks can be classified, the two pick structures are about equally common (roughly 40–50% each).

Structure errors can hide behind matching rates. On a card whose $1.75 order fee includes the first unit, billing 3,200 picks at $0.40 instead of 1,200 additional units charges the first pick twice: 2,000 × $0.40 = $800 (Per-order fees, first-pick vs. additional-pick, and per-unit pricing).

If the 3PL bills shipping on its own card and the invoice shows a zone, weight break or service your copy doesn't, ask for the complete rate table for that service before you check those shipments. Some 3PLs show full tables in their customer portal.

Rate changes, versions and tiers#

Volume tiers can apply in two ways: the whole period's volume billed at the tier reached, or only units above each threshold at the lower rate⁸. Ask which your contract uses, what volume counts and over what period it's measured; see Tier and volume-discount verification and Charging list price instead of negotiated tiers.

Treat each rate change as a new version of the card, with its own effective date⁷, even when it arrives as a notice or email. Check each line against the version in effect on the date your contract uses (step 4), since one billing period can span two versions. For which date starts a new rate, billing periods that straddle a change and later invoices that re-bill earlier months, see Outdated rates after a contract change.

What a checkable invoice looks like#

A checkable invoice shows quantity, unit and rate on every line, as the US federal rule for a proper government invoice requires (FAR 32.905, effective March 13, 2026)⁹. Other markers:

• Fee names that match the card, or a mapping from the 3PL.
• An updated card, with an effective date, before any change.
• A shipment-level file when shipping is billed on the 3PL's own card.
• Time to get missing detail: a 30-day dispute window is common and 14 days is short.

In about a quarter of Implentio customers' 3PL contracts with storage fees, at least one storage line shows only a dollar amount.