Chinese Buyer Deducts Quality Losses from an Invoice: Is the Set-Off Valid?
A Chinese buyer pays part of an invoice and deducts the balance for alleged defective goods, reworking costs or a complaint from its own customer. The seller should first identify what the buyer is claiming: a contractual credit, a reduction of the sale price, damages to be set off, or a temporary right to withhold payment. Those claims require different legal and evidential analysis. A debit note alone does not establish that the invoice balance has been discharged.
This guide concerns commercial cross-border sales and a foreign seller seeking payment from a Chinese buyer. It explains how to separate a genuine quality claim from an unsupported deduction without assuming that every deduction is improper.
1. Identify whether this is price reduction or set-off
Price reduction changes the price payable for non-conforming goods; set-off uses a countervailing debt to discharge another debt. An agreed discount or credit note may instead reflect a negotiated settlement. A right to suspend performance is a separate question and does not itself extinguish the invoice debt.
If the United Nations Convention on Contracts for the International Sale of Goods (CISG) applies, Article 50 uses the relative values of the goods actually delivered and conforming goods at delivery to determine the reduced price. The buyer’s own repair estimate is not automatically that calculation. Article 50 also restricts price reduction where the seller cures in accordance with Articles 37 or 48, or the buyer refuses performance offered in accordance with those provisions.
Where Chinese domestic sales law governs, Article 582 of the Civil Code first directs attention to the agreed remedies. If the remedy remains undetermined under the statutory rules, the injured party may reasonably choose remedies, including repair, replacement, return or price reduction, according to the nature of the goods and the loss. The seller should ask the buyer to identify the basis of each deduction rather than accept the label “quality compensation” as a complete explanation.
2. Check the applicable rules before applying Chinese set-off law
The buyer’s location in China does not settle every governing-law question. Check the parties’ places of business, the contract’s choice-of-law clause, any CISG exclusion, applicable reservations and the chosen court or arbitration forum. China has been a CISG Contracting State since 1 January 1988 and maintains the reservation concerning Article 1(1)(b). A choice of Chinese law should not simply be treated as an express exclusion of the CISG.
The CISG does not contain an express general set-off provision. Whether a particular set-off issue is governed by the Convention, and how any gap is resolved, requires analysis of the claims and Article 7; domestic set-off rules should not be inserted automatically. The Chinese-law checklist below applies where Chinese domestic law governs the relevant set-off question. China’s judicial interpretation on international treaties also requires attention to applicable treaties, reservations and permitted contractual exclusions.
3. If Chinese domestic law governs, test the set-off conditions
Article 568 of the Civil Code requires reciprocal debts with subject matter of the same kind and quality, subject to exclusions arising from law, the nature of the debt or the parties’ agreement. For a buyer asserting set-off, its claim against the seller must be due. A claim belonging to the buyer’s affiliate is not automatically the buyer’s own claim; group ownership alone does not establish reciprocity. Different currencies also require examination rather than an assumed one-for-one deduction. Article 569 separately permits agreed set-off of reciprocal debts with different kinds or qualities of subject matter.
The buyer must notify the seller, and statutory set-off must not be conditional or subject to a time limit. Receipt of the notice matters. Under Article 55 of the Supreme People’s Court’s contract interpretation, if the court finds the set-off right established, the reciprocal debts are extinguished to the corresponding amount when notice reaches the other party. The notice itself does not prove the existence, maturity or amount of the buyer’s claim.
Do not assume either that a disputed claim can never be set off or that a prior judgment is always necessary. Equally, do not accept a deduction merely because the buyer sent an email. Preserve objections to the debt, amount, contractual restrictions and receipt of notice. Limitation defences may also matter under Article 58 of the interpretation.
4. Reconcile the invoice with five sets of evidence
| Issue | Records to compare | Question to resolve |
|---|---|---|
| Unpaid sale price | Signed contract, purchase orders, invoices, delivery records, payments and earlier credits | What is due, from which legal entity, and has any deduction already been allowed? |
| Alleged defect | Agreed specifications, samples, batch numbers, inspection records and preserved goods | Does the evidence establish non-conformity attributable to the seller for this shipment? |
| Inspection and notice | Receipt dates, inspection arrangements, dated defect notices and communications about cure | Were the applicable requirements met, and is an exception relevant? |
| Amount and causation | Repair or replacement bills, downstream claim documents, payment evidence and mitigation records | Which losses were caused by the breach, recoverable and supported, without double counting? |
| Set-off and settlement | Deduction statement, contractual set-off clauses, evidence of notice receipt and any agreed credit | Is there a due reciprocal claim and valid set-off, or only a proposal requiring agreement? |
Quality allegations must be checked against the contract and the governing sales rules. CISG Articles 35, 38 and 39 address conformity, inspection and notice; Articles 40 and 44 contain qualifications that can affect a notice defence. Under Chinese domestic law, Articles 620–622 likewise require attention to agreed periods, reasonable notice, guarantees, the seller’s knowledge and an inspection period too short for a full examination. Do not reject a claim solely by counting days without checking the relevant conditions.
For damages, causation, foreseeability and mitigation remain important under CISG Articles 74 and 77 or Civil Code Articles 584 and 591, as applicable. A customer’s demand against the buyer is not automatically a recoverable loss against the seller. Check the underlying liability and evidence, and prevent overlap between a price reduction, a credit and damages for the same loss. See the related inspection and defect-notice guide.
5. Keep the disputed deduction separate from the remaining balance
Illustration only: an invoice is CNY 100,000, the buyer pays CNY 80,000 and alleges a CNY 20,000 quality loss. The remaining CNY 20,000 is a disputed balance, not an automatically extinguished debt. If only CNY 5,000 is established as a due reciprocal damages claim and all applicable set-off conditions are satisfied, the simplified remaining principal would be CNY 15,000.
This example assumes no separate price reduction, other credits, interest, costs or competing debts. Real allocation may require the rules in Article 56 of the contract interpretation and Civil Code Articles 560–561. Neither the alleged CNY 20,000 nor the illustrative CNY 5,000 is a finding about an actual case.
Ask for an itemised calculation and identify the amount the buyer accepts is payable. Seek payment of the undisputed amount where properly due while reserving the contested issues. Before signing a reconciliation or accepting a credit note, check whether it admits the deduction or releases the remaining claim. Any settlement should identify the invoices, agreed credit, payment allocation, payment deadline and conditions for any release. A proposed instalment plan needs its own review.
6. Prepare a focused review before a demand or proceedings
Prepare a short chronology showing delivery, inspection, notice, payments and deduction. Preserve the complete communications and the goods or reliable inspection evidence. Review the forum clause before choosing between a demand, negotiated reconciliation, arbitration or litigation, including how any defence or counterclaim can be addressed. Asset and enforcement information may affect the practical recovery strategy. The related Chinese buyer payment-default guide covers the broader collection process.
For an initial discussion, provide the parties’ legal names, invoice currency and unpaid amount, due date, the buyer’s stated deduction and the contract’s dispute-resolution clause. Identify any imminent deadline. After an initial conflict check, the relevant contract, notices, inspection records and deduction calculation can be reviewed to assess the payment claim, the alleged quality claim and possible next steps. The service scope and fees should be agreed before engagement; sending documents alone does not establish representation or guarantee recovery.
See legal services and contact Lawyer Pan, or email panjianxing46@gmail.com with a brief summary of the China-related trade dispute.
Official sources, checked 27 September 2026: Civil Code of the People’s Republic of China (effective 1 January 2021), Articles 560–561, 568–569, 582, 584, 591 and 620–622; SPC interpretation on the General Provisions of the Contract Book, Fa Shi [2023] No. 13 (effective 5 December 2023), Articles 55–56 and 58; official CISG text and UNCITRAL status and reservations; SPC interpretation on international treaties and international usages, Fa Shi [2023] No. 15 (effective 1 January 2024), Articles 1 and 3.
This article provides general information, not a conclusion on a particular transaction. The cover is an AI-generated conceptual illustration, not a photograph of an actual client, case or shipment.
