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An agreed price minus an unagreed deduction is not payment in full. It is a part payment with a label missing.

The invoice was for one amount, the payment arrived smaller, and buried in the remittance note, or nowhere at all, is a fee: a processing charge, a platform percentage, an admin cost you never heard of until it came out of your money. The size is often small enough to feel petty questioning, which is exactly why the habit survives. This page treats it as what it is, an accounting question with a clean order: identify precisely what was taken and who took it, check whether anything you actually agreed permits it, claim the difference as a balance still owed with the deduction named in plain words, and handle honestly the one deduction that can be legitimate. Then close the category with one line in your next agreement, so fees stop being a surprise either side can spring.

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Updated November 13, 2026. First published November 13, 2026. The records quoted below are real and public, read back from the live service on November 13, 2026.

Step 1. Identify the deduction exactly: amount, label, and who took it

Three different deductions hide inside the same short payment, and they have different owners. The client may have deducted something themselves: a fee for their payment platform, a charge for their own admin, a percentage they describe as standard. Their payment service may have taken its cut on the way through, with the client genuinely believing they sent the full amount. Or a bank or intermediary may have taken a transfer fee, the classic silent shave on a cross-border payment. Before any message, establish which of the three you are looking at, from the records: the remittance amount the client sent, the fee lines on the transfer or platform statement, and the amount that landed. Ask the client for their send confirmation if the trail is unclear; a client acting in good faith can produce it in a minute, and the document usually names the taker. Precision here is not pedantry. A deduction the client chose is a negotiation. A fee their platform took is a routing problem. Arguing with the client about their bank's charge, or chasing the platform about the client's own deduction, wastes the one short conversation this deserves.

Step 2. Check what you actually agreed, because agreement is the whole question

A deduction you agreed to is a cost of the route you chose, and the honest move is to price it into your rates and say nothing. That covers the platform you proposed, whose published percentage you knew, and any fee split written into the agreement. A deduction nobody mentioned sits in different territory: the agreed price was a gross amount for the work, and one side unilaterally repriced it after the work was done. Check the three places an agreement could hide: the contract or terms you both confirmed, the quote the client accepted, and the payment instructions you sent with the invoice. If none of them names a deduction, a percentage, or a fees clause, then the full invoice amount is what was owed, and the payment that arrived is a part payment, whatever the remittance note calls it. There is one honest exception, covered in step 4: tax withholding required by law in the client's place, which can be legitimate even when it surprises you, and which comes with documents you are entitled to receive.

Step 3. State the balance against the delivered and accepted record

The claim is strongest when it is boring: invoice for an agreed amount, work delivered and accepted, payment received less an unagreed deduction, balance equals the deduction. The record format is AER-1, published as an IETF Internet-Draft (draft-zambo-aer1-26), and each step carries a verifiable receipt: a receipt proves the saved result was not changed since it was saved. The two public records below show the decision layer the balance statement stands on:

Accepted: the decision is on the record

Pending: checked, and still waiting on a decision

The accepted record is the shape that makes this a one paragraph matter: steps checked, decided by the client, release ok_to_release, the job closed at its agreed amount. Against a closed record like that, a deduction has nowhere to hide inside the work; it can only be a payment-side event, judged purely on whether it was agreed. The pending record shows the weaker hand to avoid: if the job itself still sits undecided, a client can blur a fee argument into a quality argument. Close the acceptance first, then settle payment questions on payment facts, one dispute at a time, each on its own evidence.

Step 4. Claim the shortfall as a balance, and handle the withholding case honestly

Send one short message with the arithmetic in it: invoice amount, amount received, the deduction identified by name and taker, and the balance remaining, with a date and a clean way to pay it. Name the basis in one sentence: nothing in the agreement provides for a deduction, so the balance stands. Then stop; a small balance claimed precisely, once, settles more often than a grievance argued at length. The exception: if the client says the deduction is tax they were required to withhold, do not dismiss it, because in several countries that duty is real. Ask for the withholding certificate or official receipt in your name, which you need for your own tax filings and which a legitimate withholder can always produce. With the certificate, the money is usually creditable against your own tax, and the argument ends as paperwork. Without any document, a withholding claim is just a deduction with a grander name, and the balance stands as before.

Step 5. Put one fees line in the next agreement, in both directions

The line that ends this category reads roughly like this: the invoiced amount is the amount to be received; payment charges sit with the sender unless a named exception is written here; any deduction, including any tax withholding, is notified before payment and documented at payment. Writing it in both directions, their fees theirs, yours yours, is what makes it easy for a good client to sign: it is visibly symmetrical, not a grab. Pair it with the practical half: one agreed payment route whose fee behaviour both sides know, chosen before the first invoice, and a habit of stating the expected received amount on the invoice itself. Suppliers who never meet mystery deductions are not luckier than you; they just made the fees a written term while the amounts were still hypothetical and nobody cared, which is the only moment such terms are free.

What this page cannot settle

This page cannot tell you whether a specific deduction was lawful in your place or the client's; platform terms, payment rules, and withholding duties vary, and this is general information, not legal advice. It also cannot make a determined client repay a small deduction on a finished relationship, where the realistic choice is between the formal routes in proportion to the amount and pricing the lesson into future work. A verifiable receipt proves the saved result was not changed since it was saved; it does not prove what a payment service charged or what a client intended. What the record settles is the half that gets argued first: that the work was delivered and accepted at an agreed amount, so the deduction has to justify itself on its own facts.

Frequently asked questions

My client deducted a fee from my payment without telling me. What do I do?

Treat the payment as a part payment and claim the difference as a balance. First identify the deduction exactly from the records: the amount, its label, and who took it, the client themselves, their payment platform, or a bank on the route, asking for their send confirmation if the trail is unclear. Then check the contract, the accepted quote, and your invoice instructions for anything that permits a deduction; if none of them names one, the full invoice amount was owed and the shortfall stands. Send one short message with the arithmetic, invoice, received, deduction named, balance remaining, and a date and route for settling it, noting that nothing agreed provides for the deduction. One exception deserves a different handling: if the client says it was tax they had to withhold, ask for the withholding certificate in your name, which legitimate withholding always produces and which you need for your own taxes anyway.

The client says the fee is just how their platform works. Is that my problem?

Only if you agreed to that platform or to bear its costs. A client's chosen payment system is part of their side of the transaction, the same way your tools are part of yours, and its percentage does not become your discount because their system takes it before forwarding. The fair settlements are simple: they top up the fee so the invoiced amount arrives whole, they pay by a route without the deduction, or, for future work, the fee is named in the agreement and priced in openly, where it belongs. What does not work is silence: a fee absorbed once without a word becomes the expected net price, and every later invoice gets measured against the discounted amount you appeared to accept.

The deduction is small. Is it worth raising at all?

Raise it once, briefly, in writing, precisely because it is small. The money in a single small deduction is rarely the point; the precedent is. A deduction that passes unremarked teaches the client's payment process that your invoices settle at a discount, and percentages scale with the relationship: the same habit on a year of invoices is real money. A one line balance note costs you two minutes and no goodwill with any reasonable client, because it reads as bookkeeping, not complaint. The proportionate version is calm and final: name it, state the balance, and pair it with the fees line for the next agreement, so the conversation happens once in the relationship instead of on every payment.

How is this different from a discount I agreed to for early payment?

Consent and timing. An early payment discount is offered or accepted by you, before the work or before the payment, at a rate you chose, for a benefit you valued, speed. A unilateral deduction is taken after the work, at a rate you never saw, for a cost that is not yours. The first is pricing, the second is repricing, and keeping them visibly separate in your messages protects the first: when you do choose to offer terms, the client can trust the number means the number, because they have seen that your numbers are not quietly adjustable from their side either. If a client wants a standing arrangement on fees or discounts, put it in the agreement as a named term with a rate, where both shapes belong.

How does a job record help when a payment arrives short?

It closes the work side of the argument so only the payment side remains. When the work runs through Zambo, every job lands on its own record with a verifiable receipt for each step under AER-1, published as IETF Internet-Draft draft-zambo-aer1-26, the client accepts on that record, and the acceptance view shows status, decider, date, and release state, so the agreed amount for delivered, accepted work is checkable at a link and a deduction cannot hide inside a dispute about the job. Every tool free once a day, plus 3 continue calls. One free wrap-up handover per day, and pickup is always free. For $0.99, run your next job on one record with the fees line written in the agreement, so if a payment ever lands short, the balance is a one paragraph claim against a closed record: get the Day Pass. A Day Pass is unlimited for 24 hours, no subscription. Ongoing use is the Zambo Pass at $29 a month, $19 a month for $ZAMBO holders, or Lifetime at $250 one time.

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