What is trade finance? A plain-language overview of the main instruments

"Trade finance" sounds complicated, but at its core it solves one very practical problem: sellers want to get paid early, buyers want to receive goods before paying in full, and both sides usually need a third party — typically a bank — to reduce risk for everyone involved. Here's a plain-language look at the most common instruments.

Why trade finance exists

In a typical import/export deal, payment and goods don't arrive at the same moment — a shipment can spend weeks at sea while the seller has already spent capital on production. Trade finance fills that cash-flow and risk gap. According to the latest Asian Development Bank (ADB) survey, the global trade finance gap remains around US$2.5 trillion — roughly 10% of total global trade value — showing this is still a major challenge, especially for small and mid-sized businesses.

Common trade finance instruments

Letter of Credit (L/C)

The buyer's bank commits to pay the seller once the seller presents a complete, compliant set of documents as specified in the L/C. This is the safest option for both sides since a bank stands in the middle with a payment commitment, but it comes with more paperwork and higher cost than other methods. According to the ICC Trade Register 2025 — a dataset aggregated from 21 major global banks — default rates on trade finance instruments like L/Cs remain very low, under 0.3%, and recent trends show traditional L/Cs seeing renewed use amid tariff disruption and shifting trade regulation.

Documentary Collection (D/P, D/A)

Simpler and cheaper than an L/C: the bank's role is limited to passing along documents, without guaranteeing payment on the buyer's behalf. D/P (Documents against Payment) means the buyer must pay before receiving the documents needed to claim the goods; D/A (Documents against Acceptance) means the buyer only has to sign an acceptance to pay by a later date. Risk to the seller is higher than with an L/C since there's no bank payment guarantee.

Receivables Finance / Factoring

The seller sells its right to collect an unpaid invoice to a bank or financial institution to get paid early, instead of waiting for the buyer's contractual payment date. Useful when the seller needs faster cash flow while still offering the buyer payment terms.

Trade Loans

This is the largest single category of global trade finance revenue — banks lend directly to fund working capital for import/export operations, not tied to one specific shipment the way an L/C is.

A few things worth knowing when working with a Vietnamese supplier

Suppliers with a longer export track record are usually flexible across several payment/finance methods (not just demanding 100% T/T in advance), because they understand which instrument fits which order size.
For a first trial order, an L/C or D/P is often a reasonable balance between safety and cost.
L/C opening costs and related bank fees should be discussed upfront — by convention, whichever party requests a given instrument typically covers its associated fees, but this should be agreed in writing in the contract.

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