Read time: 8 minutes   |  By: YUPSENI Team

1. I. Every Trade Is a Race Between Money and Goods
2. II. T/T: The 30/70 Rhythm and What Each Half Buys
3. III. L/C: The Bank Steps In, and the Fine Print Steps Up
4. IV. The Bill of Lading: Your Money Lives on a Piece of Paper
5. V. D/P, D/A, O/A: The Other Rungs of the Trust Ladder
6. VI. The Document Package That Clears Customs
7. VII. Negotiating Your First Container: What Actually Works

Every international trade is a race. The seller wants payment before the goods leave the factory. The buyer wants the goods in the warehouse before the money leaves the bank. Neither side can have both, so every import contract is a negotiated answer to one question: who carries the risk, and at which moment does it change hands?

The payment terms on a building material purchase order-the T/T, the L/C, the B/L-are not administrative details to be signed without reading. They are the risk map of the entire transaction. This guide explains what each term actually does, what the common payment rhythm of a Chinese PVC supplier means for a buyer, and how to negotiate terms that match your relationship with the factory. It follows the same importer workflow as our OEM process guide and the shipping and packaging guide.

Start with the geometry of the problem. The buyer is in one country, the seller in another, the goods travel by sea for weeks, and neither party can physically inspect the other's promise. The buyer cannot verify that the container was loaded until it is already on the vessel. The seller cannot verify that the buyer will pay until the money arrives. Every payment method in international trade is a mechanism for managing this mutual blindness.

The spectrum runs from full trust to zero trust. At one end, the buyer pays in advance and carries all the risk. At the other end, the buyer pays after receiving the goods and the seller carries all the risk. Everything in between-the 30/70 split, the letter of credit, the documents-against-payment arrangement-is a way of splitting the risk so that neither party is fully exposed. The better you understand where your risk sits, the more rationally you can negotiate.

T/T stands for telegraphic transfer-in practice, a bank wire transfer. It is the most common payment method in China's building material export trade, and the standard rhythm for a first-time buyer is 30 percent in advance, 70 percent against a copy of the bill of lading. Understanding what each half pays for changes how you read the offer.

The 30 percent advance covers the seller's real costs before production begins: raw material purchase, line setup, tooling, and the factory floor space committed to your order. A supplier who asks for this is not being greedy. They are protecting themselves against the buyer who cancels after the material has been cut. The 70 percent against the bill of lading copy is the seller's proof that the container has actually been loaded on the vessel-at which point the goods are in transit and the seller's production risk is over.

Where does the buyer's risk sit in this arrangement? Between the advance payment and the loading date. If the factory fails to produce, delays the shipment, or produces goods that do not match the sample, the buyer's leverage is limited to the unpaid 70 percent. That is why the advance payment percentage is the single most negotiable number in a first contract-and why established suppliers drop it to 20 percent or less for repeat customers. T/T runs on trust.

A letter of credit replaces the seller's trust in the buyer with the buyer's bank's promise. The issuing bank commits to pay the seller-provided the seller presents documents that match the L/C terms exactly. The seller ships the goods, presents the documents, and gets paid by the bank. The buyer repays the bank later. In theory, this is the cleanest risk split in international trade.

In practice, the letter of credit is a document-exactness game, and the game has a name: discrepancies. Every detail on every presented document-the invoice, the packing list, the bill of lading, the certificate of origin-must match the L/C wording letter for letter. A shipping date that differs by one day from the L/C's latest shipment date is a discrepancy. A description that abbreviates "foam board" where the L/C writes "PVC foam board" is a discrepancy. Banks are not forgiving, because a discrepancy lets the bank refuse payment entirely. This is how an apparently secure L/C becomes an unpaid shipment: the documents were 99 percent correct, and 99 percent is not enough.

L/Cs also cost money-opening fees, amendment fees, and discrepancy charges that can reach hundreds of dollars per error. The method makes sense for large orders, for new supplier relationships, or for markets where the buyer's government requires it. For repeat orders with a verified factory, the cost and paperwork of an L/C usually exceed the risk it removes.

The bill of lading is the most important document in the entire transaction, and most first-time buyers underappreciate it. The B/L is a receipt for the goods, a contract of carriage, and-critically-a document of title. Whoever holds the original bill of lading holds the right to claim the goods from the carrier at destination. No original, no cargo. This single fact explains the entire payment architecture around it.

Under the standard 30/70 T/T arrangement, the seller ships the goods and sends the buyer a copy of the B/L. The buyer pays the 70 percent. The seller then releases the original bill of lading, which the buyer presents to the carrier to take delivery. The sequence protects both sides: the buyer never pays the balance without proof the goods are on the water, and the seller never releases title until the balance is paid. The system is elegant, and it only works if you understand which version of the B/L you are looking at.

Two further distinctions matter at the desk of a freight forwarder. A clean bill of lading states the cargo was received in good condition; a claused or unclean B/L notes damage or shortage, and no buyer should pay the balance against an unclean B/L without understanding what the clause says. And the B/L may be issued by the vessel operator or by a freight forwarder-the house B/L versus the master B/L distinction that becomes important when cargo is consolidated. Ask your forwarder which one you are receiving and what it means for claiming the cargo.

Between T/T and L/C sit two older methods that use the banking system as a document courier. Under documents against payment (D/P), the seller ships the goods and sends the documents through banks; the buyer pays, and only then receives the documents-including the B/L. Under documents against acceptance (D/A), the buyer accepts a bill of exchange promising payment at a future date, and receives the documents-and the cargo-immediately. D/A is the dangerous one: the buyer gets the goods before paying, and the seller's only recourse is the buyer's promise.

Open account (O/A) sits at the far end of the trust ladder: goods shipped, invoice sent, payment due in 30, 60, or 90 days. O/A is how established importers buy from established factories after years of transactions. It is not a first-order term. Any supplier offering O/A to a first-time buyer is either very confident in their product or very confident in their lawyers.

The B/L travels with a small suite of documents, and every one of them has a job at the destination port. The commercial invoice is the value statement that customs uses to calculate duties-which is why the declared unit values should match the payment records in your own accounting. The packing list records the cartons, pallets, weights, and dimensions that the terminal uses to check the load. The certificate of origin states where the goods were made, which determines tariff treatment under your country's trade agreements.

For building materials, the package often also includes test reports and compliance documents-the certification paperwork that our certification guide covers in detail. The practical rule for the whole package: ask for the complete list before you pay the deposit, not after the vessel sails. Documents that are missing or inconsistent at destination translate directly into demurrage, customs holds, and invoices from freight forwarders that nobody expected.

A first order is a mutual audition, and the payment terms should reflect that. The following negotiating sequence has worked for importers across the building material trade:

The factory that ships your first container wants the same thing you do: a transaction that closes cleanly. A buyer who understands the risk map, negotiates sensibly, and honours the payment schedule becomes the customer who gets the better terms on the second order-the 20 percent advance, the telex release, the priority production slot. The terms you accept on your first container are the terms you will be offered for the next ten. Our manufacturer vetting guide covers how to verify the factory before any of this begins. For a sample quotation with full payment and document terms, use the inquiry form or contact our sales team.