Storage billing

3PL minimum charges and contract terms

Category
Storage billing
Published
15 Oct 2026
Last verified
15 Oct 2026
Reading time
5 min
Two stretch wrapped pallets of cartons with a blank paper tag clipped to the front pallet, lit with warm gold light on dark navy

A 3PL minimum monthly charge is the smallest amount a client pays in a month, however little they store or ship. It exists because holding space, keeping a team trained on the account and running the system cost money even in a quiet month. Without a minimum, a client with one pallet and no orders costs you more than they pay.

This page explains how minimums work, how to show them on an invoice, how to handle the first and last months, and which other contract terms affect billing. Amounts are hypothetical. Nothing here is legal advice, so have a lawyer read your contract.

Why minimums exist

Your costs do not move with each client's volume. Racking, the building, system licences and a person who knows the account are there whether the client ships 20 orders or 2,000. A minimum puts a floor under the cost of being ready for that client.

It also filters. A client who will not agree to any minimum is telling you something about how much volume they expect.

Three common minimum types

Monthly account minimum. One figure for the whole account. If total charges for the month fall below it, the client pays the minimum. This is the simplest and the one clients understand fastest.

Storage minimum. A floor on the storage line alone, such as a minimum number of pallet positions. It protects the space you set aside for them.

Per-activity minimums. A minimum on a single charge, such as a minimum receiving charge per inbound shipment, so a delivery of two cartons still covers a dock appointment. Use these sparingly. Too many small minimums make a rate card hard to read.

Pick the one that matches the cost you want to cover, and say which in the contract.

Showing the minimum as a top-up line

A minimum that is hidden inside a total looks like an error. Show it as its own line, and only when it applies.

Hypothetical example. The monthly minimum is $500.00. The client's activity for the month comes to $320.00 across storage, receiving and picking.

LineAmount
Storage$180.00
Receiving$60.00
Pick and pack$80.00
Activity total$320.00
Minimum charge top-up ($500.00 minus $320.00)$180.00
Invoice total$500.00

The client can see the activity, the minimum, and why the top-up exists. In a busy month where activity is $640.00, the top-up line does not appear. For a full invoice built from raw counts, see the monthly invoice example.

Check that your system calculates the top-up itself. If someone has to work it out by hand each month, it will be missed or wrong at some point.

Prorating the first and last month

A client who starts on the 20th has used a third of the month. Does the full minimum apply? There is no standard answer, so the contract has to give one. The options are:

  • Full minimum from the start date. Simple, but a client may object to paying a full month for ten days.
  • Prorated by days. Minimum multiplied by days active over days in the month. Fair, and easy to explain.
  • Waived for the first month. A common concession while the account ramps up. If you waive it, write that down with the dates.

Apply the same rule at the end. If a client leaves on the 10th, say whether the last month is prorated. If you bill from an anniversary date rather than the calendar month, as covered in storage billing methods, the same question applies to each partial cycle.

Other terms that change what you bill

The minimum is one clause. These also affect the invoice, and each should be explicit.

Term and notice. How long the agreement runs, how it renews, and how much notice either side gives to end it. A long term can justify a lower rate. A short term with long notice protects you from a sudden exit.

Rate review dates. A date when rates can change and how much warning the client gets. Without one, you carry cost increases until someone remembers to raise them. Put the date in a calendar, and check that the billing system has the new rates loaded before that date arrives.

Pass-through charges. Freight, purchased pallets, and similar costs billed at or near cost. State whether a handling fee is added, and keep each pass-through on its own line.

Payment terms. Days to pay, how late payment is handled, and what happens to stored goods if an invoice is overdue. This one needs a lawyer.

Storage of abandoned or unclaimed stock. What happens to inventory a client stops paying for. It rarely comes up, and when it does it is awkward.

Adjustments and disputes. How a client raises a query, and the time limit for doing so. Clear terms here keep a small disagreement from becoming a standing one.

A short contract-and-billing check

Before you send a contract to a new client, test it against the billing side.

  1. Can your system calculate every charge written in the contract?
  2. Does the contract say how the first and last months are prorated?
  3. Is every minimum named and priced?
  4. Is the rate review date recorded somewhere you will see it?
  5. Is each pass-through line described, with or without a fee?

If the answer to any is no, either change the contract or change the system. A promise the system cannot keep gets settled by hand, and by hand is where errors start. The billing software features checklist lists the capabilities worth testing.

Next step

Open your three oldest client contracts and find the minimum in each. Check that the invoice shows it as a separate line, and that the review date written in the contract is in someone's calendar. Then ask a lawyer to review the wording before the next renewal.

Questions people ask

What is a 3PL minimum monthly charge?

It is the smallest amount a client pays in a month regardless of activity. It covers the fixed cost of keeping the account open, such as space, setup, and account management.

How should a minimum charge appear on an invoice?

As its own top-up line, shown only when the month's activity falls below the minimum. The line is the difference between the minimum and the activity total.

Does the minimum apply to the first and last month?

Only if the contract says so. Many contracts prorate the minimum for a part month, but this has to be written down, with the proration method stated.

What is a pass-through charge in a 3PL contract?

A cost billed to the client at or near what the 3PL paid, such as carrier freight or purchased packing materials. Contracts usually say whether a handling fee is added on top.

How long should a 3PL contract term be?

There is no single answer. Longer terms give the 3PL stable income and justify setup work, shorter terms give the client flexibility. Whatever is chosen should include a notice period and a rate review date.

Should I get a lawyer to check my 3PL contract?

Yes. This page explains the billing mechanics, not the legal wording, and a contract is a legal document.

Sources

  • No third-party figures are used on this page. All amounts and dates are hypothetical examples made up for illustration. This page is not legal advice, so have a lawyer review any contract.