A purchase order or proforma invoice is not enough protection when sourcing from China. As your order volume grows, a formal written contract becomes essential to define product specifications, payment obligations, delivery timelines, quality standards, and what happens when things go wrong. Many disputes arise not because the factory is dishonest, but because expectations were never written down clearly. This article outlines the essential clauses every buyer should include in a China sourcing contract, and how they relate to the PI and PO documents you already use.
1. Product Specifications and Acceptance Standards
The most common source of disputes is ambiguity about what exactly is being ordered. The contract should attach or reference detailed specifications so both sides measure success against the same benchmark:
- Detailed product specifications: dimensions, materials, colors, weight, and functional parameters.
- Reference samples or sealed samples signed by both parties as the quality benchmark.
- Applicable standards (e.g., ASTM, CE, FDA, RoHS) and the AQL inspection level (commonly 2.5 major / 4.0 minor).
- Packaging requirements: carton dimensions, labeling, barcodes, and shipping marks.
- Intellectual property ownership, including who owns tooling, molds, and custom designs.
2. Pricing and Payment Terms
Clarity on money prevents most payment-related conflicts. Chinese factories expect predictable payment milestones and will resist unusual payment structures:
- Unit price, currency, Incoterms rule (EXW, FOB, CIF, DDP), and whether tooling or mold fees are included.
- Payment schedule: typical terms are 30% T/T deposit upon order confirmation, 70% balance before shipment or against copy of B/L.
- Who pays for bank fees, and confirmation that the beneficiary account matches the contract entity name. Never wire funds to a personal account that differs from the contract entity.
- Price validity period and conditions for price adjustment on repeat orders.
3. Delivery Timelines and Penalties
Delays can disrupt your entire sales channel and lead to stockouts. The contract should specify exact commitments and remedies:
- Exact production lead time from receipt of deposit and approved samples.
- Whether the lead time includes or excludes transit time.
- Liquidated damages for late delivery, commonly 0.5–1% of the order value per week of delay, up to a cap (often 10–20%).
- The buyer’s right to cancel the order and receive a refund if delays exceed an agreed threshold (e.g., 30 days).
- Force majeure clauses defining what counts as an excused delay (natural disasters, government shutdowns, port strikes).
4. Quality, Warranty, and After-Sales
Define how defective products are handled after shipment so there is no argument about who bears the cost:
- Rejection rights: the buyer may reject the shipment if the third-party inspection result is FAIL or if defect rates exceed agreed thresholds.
- Remedies: replacement, rework, discount, or credit for future orders — specify which applies and in what proportion.
- Warranty period (e.g., 12 months from shipment) for manufacturing defects, excluding misuse or normal wear.
- Whether the factory covers return shipping and replacement logistics costs for confirmed defects.
5. Intellectual Property and Confidentiality
Protect your designs, brand, and business information before you share anything sensitive with the factory:
- Trademark registration in China before tooling production begins. China uses a first-to-file system, so register early.
- An NDA clause prohibiting the factory from sharing your designs with competitors or selling overstock on public platforms.
- Confidentiality of pricing, customer information, and product roadmaps.
- A clause requiring the factory to destroy or return all confidential materials after contract termination.
6. Dispute Resolution and Governing Law
No one expects disputes, but you should plan for them. Enforcing a foreign judgment in China is difficult, so choose a practical mechanism:
- Preferred dispute resolution: negotiation first, then either CIETAC arbitration or a mutually agreed third-party mediation.
- Governing law and language versions. Note that Chinese courts generally prioritize the Chinese-language version of a contract, so have the bilingual version reviewed by a local lawyer.
- The contract should be signed by a legal representative of the factory entity (not just a salesperson) with the official company chop (公章), not a contract-specific seal.
PI, PO, and Contract: How They Relate
A Proforma Invoice (PI) confirms order details at the start — unit price, quantity, and payment terms. A Purchase Order (PO) is the buyer’s formal order reference. A formal supply contract sits above both, governing the ongoing relationship and repeat orders. For first-time orders above a certain value (typically $5,000–$10,000), a contract is strongly advisable; for ongoing relationships, a master supply agreement can cover multiple POs and simplify reordering.
Before signing, have a local Chinese lawyer review the contract, especially the dispute resolution and IP clauses. A few hundred dollars in legal fees is trivial compared to the cost of an unenforceable agreement. Keep a signed hard copy and a digital backup, and share a copy with your inspection company so they know the acceptance standards they are checking against.
A well-drafted contract does not guarantee a perfect order, but it gives you leverage when problems arise and signals to the factory that you are a serious, professional buyer. Want to understand payment terms in depth? Read our detailed explainer on China payment terms for importers.