Letter of credit for importers: secure your supplier payment (2026)
The first-deal standoff in international trade
You have found the perfect supplier in India for a $100,000 machinery order. They want payment before they build it; you are wary of wiring six figures to a company you have never met. They are equally wary of shipping with no guarantee of payment. This mutual distrust stalls thousands of cross-border deals every day — and it is exactly the problem the letter of credit was invented to solve.
A letter of credit (L/C), also called a documentary credit, places two banks between the buyer and the seller. The bank commits to pay the exporter the moment they prove, with documents, that they shipped the agreed goods. No blind wire transfer, no shipment without a safety net: each side relies on a bank's undertaking rather than on trusting the other party.
This guide walks through the mechanics step by step, breaks down the real costs under UCP 600 rules, and uses three worked examples to show where the fees hide — issuance, confirmation, and above all the document discrepancies that delay payment.
How a letter of credit works, step by step
A documentary credit involves four main parties: the applicant (the importer), the issuing bank (the importer's bank), the advising bank (the exporter's bank) and the beneficiary (the exporter). The typical flow:
- 1. Sales contract — buyer and seller agree that payment will be by L/C, and fix the Incoterms, the latest shipment date and the list of required documents.
- 2. Issuance — the importer asks their bank to issue the credit. The bank sends a SWIFT MT700 message to the exporter's bank.
- 3. Advising — the advising bank notifies the seller that the credit is open and checks its authenticity.
- 4. Shipment — the exporter ships the goods and assembles the documents (bill of lading, invoice, certificate of origin, etc.).
- 5. Presentation and payment — the documents travel back up through the banks; if they comply with the credit's terms, payment is released.
Key point: under the independence principle of UCP 600, banks judge only the compliance of documents, never the physical quality of the goods. Your choice of Incoterm therefore decides who controls the bill of lading and the insurance — see our Incoterms guide.
The main types of documentary credit
All credits issued under UCP 600 are irrevocable by default: they cannot be cancelled without every party's agreement. Beyond that, several variants serve different needs:
| Type | When payment occurs | Use case |
|---|---|---|
| Sight | On compliant presentation | Standard, fast payment |
| Usance / deferred | At maturity (30, 60, 90 days) | Supplier credit, cash flow |
| Confirmed | Guaranteed by a 2nd bank | High country risk |
| Transferable | Reassignable to a 2nd beneficiary | Trading, middleman |
| Standby (SBLC) | Only on default | Safety net, guarantee |
For a first deal with an Asian supplier, the irrevocable sight credit remains the most common. In the US, note that domestic L/Cs are also governed by UCC Article 5 alongside UCP 600, and standby L/Cs (SBLCs) are widely used as performance guarantees rather than payment tools.
The real cost of a documentary credit
An L/C is not free, and its fees stack up. The ranges below are typical 2026 market estimates; every bank publishes its own grid, and country risk can swing the confirmation fee fourfold.
| Fee | Who pays (default) | Typical range | Basis |
|---|---|---|---|
| Issuance | Importer | 0.125%–0.25% / quarter | % of credit value |
| Confirmation | Exporter (negotiable) | 0.5%–2% / year | By country risk |
| Advising | Exporter | $50–$150 | Flat fee |
| Amendment | Party requesting it | $50–$100 | Per amendment |
| Discrepancy | Exporter | $50–$150 | Per discrepancy, deducted from payment |
| Cash collateral | Importer | 0%–100% of value | Depends on bank credit line |
Bottom line: for a simple sight credit, the all-in cost typically lands around 0.5% to 1.5% of the transaction value. A confirmation on a risky country, a long usance, or repeated discrepancies can double that. These fees add to your cost base — fold them into your landed-cost model rather than treating them as an afterthought.
Trap number one: document discrepancies
This is the most frequent and most underestimated source of trouble. According to International Chamber of Commerce data, a large share of presentations — typically more than half on the first pass — contain at least one discrepancy. The classics: a bill-of-lading date after the latest shipment date, an invoice amount different from the credit, a goods description that does not match the wording word-for-word, missing documents, or an expired credit.
Each discrepancy has two consequences: a fee ($50–$150) deducted from the exporter's payment, and above all a delay, because the issuing bank must obtain your waiver before it will pay. The bill of lading is the single most-rejected document: learn to vet it with our bill of lading verification guide.
Three worked examples
Example 1: $100,000 machinery, Germany → India, confirmed sight L/C
Credit value = $100,000
Issuance 0.2% × 1 quarter = $200
Confirmation 1% / year × 3 months = $250
Advising + SWIFT = ~$150
Total cost ≈ $600 (~0.6% of value)
Under 1% of value to convert a risky transaction into a bank-backed, secured deal. For an Indian importer subject to RBI documentation rules, the L/C also gives the bank the paper trail it needs to authorize the foreign-currency remittance.
Example 2: the hidden cost of two discrepancies
Presentation with 2 discrepancies (B/L date + invoice amount)
Discrepancy fee = 2 × $75 = $150
Payment delay (waiver) = +5 to 10 days
Exporter cash-flow hit = $150 + delay
The error costs little in cash but plenty in time: until you, the applicant, sign the waiver, the bank does not pay. A burned exporter will price that friction into the next contract.
Example 3: 60-day usance credit, $200,000 from China
Value = $200,000, deferred payment 60 days
Exporter discounts the draft at 6% / year
Carry cost = 200,000 × 6% × 60/360 = $2,000
Buyer benefit = 60 days of working capital
A usance credit buys you payment time (sell before you pay the supplier) at the price of a carry cost the exporter usually bakes into their price. It is a cash-flow-versus-margin trade-off to weigh deal by deal.
Cost your full import on the TRADE-COST calculator
Add documentary-credit bank fees on top of your duties, VAT and freight to get the true landed cost at delivery.
Run calculation →Conclusion: a trust tool, not a quality tool
The letter of credit is the go-to instrument for securing payment when buyer and seller do not yet know each other. But it guarantees only document compliance, never the quality of the goods: always pair it with a pre-shipment inspection certificate and careful credit wording. Master the three variables — credit type, cost structure, and document compliance — and you turn a leap of faith into a controlled transaction.
To go further, see our breakdown of customs clearance fees and our guide to the freight forwarder's role, two areas that connect directly to the documents your credit demands.
Frequently asked questions
What is the difference between a letter of credit and a documentary credit?+
None — they are two names for the same instrument. 'Letter of credit' (L/C) and 'documentary credit' both describe a written, irrevocable undertaking by an issuing bank to pay the exporter against the presentation of compliant documents. 'L/C' dominates in everyday US and UK trade; 'documentary credit' is the formal term used in the ICC rulebook. Both are governed by the same international rules: the ICC's Uniform Customs and Practice for Documentary Credits, UCP 600, in force since 2007.
Does a letter of credit guarantee the quality of the goods?+
No, and this is the costliest misunderstanding. Under the independence principle of UCP 600, banks deal in documents, not in goods. If the documents presented match the credit's wording, the bank pays — even if the container holds bricks instead of laptops. To protect yourself on quality, you must require a pre-shipment inspection certificate from an independent third party (SGS, Bureau Veritas, Intertek) inside the credit. Without that clause, the L/C secures only the payment mechanism, never product conformity.
Why does my supplier insist on a confirmed letter of credit?+
Confirmation adds the guarantee of a second bank (usually in the exporter's country) on top of the issuing bank's. An exporter in Germany selling to a buyer in a higher-risk market may doubt the issuing bank's ability to transfer currency, or the country risk itself. The confirming bank then undertakes to pay even if the issuing bank defaults. That security has a price: the confirmation fee, typically 0.5% to 2% per year depending on country risk, normally borne by the exporter but often renegotiated between the parties.
How long does it take to open a letter of credit?+
Plan for roughly 3 to 7 business days between submitting a complete file and the actual issuance of the credit via SWIFT MT700 message, assuming your bank credit line is already in place. Without a line, the bank usually requires cash collateral of up to 100% of the value, or a 20% to 50% margin, which ties up your working capital. Open the credit early: a credit issued too late pushes back the latest shipment date and can trigger amendment fees.
Is a letter of credit better than an advance payment or open account?+
It depends on trust and leverage. Advance payment (telegraphic transfer before shipment) is cheapest but exposes the buyer fully. Open account (pay 30–90 days after delivery) favors the buyer but exposes the seller, and is realistic only between established partners. The L/C sits in the middle: it costs more in bank fees but balances the risk for a first deal or a high-value order. As the relationship matures, many importers downshift from L/C to documentary collection, then to open account.
Thomas Delaunay
Thomas focuses on landed-cost modeling and forwarder benchmarking. Previously a procurement lead at a mid-cap industrial importer, he builds the cost intelligence that powers TRADE-COST calculations.
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