If your small business is starting to work with larger buyers, international suppliers, or high-value clients, you may have heard the term letter of credit thrown around in contract conversations. It sounds like banking jargon, but it is actually one of the most powerful risk management tools available to small business owners, and knowing how to use one could protect you from thousands of dollars in losses on a single deal.

This guide breaks down exactly what a letter of credit is, when you need one, and how to use it to protect your business without getting buried in paperwork or bank fees.

What Is a Letter of Credit?

A letter of credit (LC) is a document issued by a bank that guarantees payment to a seller, on behalf of a buyer, once specific conditions are met. Think of it as the bank stepping in as a neutral third party and saying: “If the seller delivers what was agreed, we guarantee the buyer will pay.”

For small business owners, letters of credit show up most often in three situations:

• You are importing goods from an overseas manufacturer and need to guarantee payment once the shipment ships
• You are selling to a large corporate client or government buyer who requires guaranteed payment terms before releasing an order
• You are entering a new high-value contract with an unfamiliar buyer and want protection against non-payment

The key thing to understand is this: a letter of credit protects both sides. The buyer does not pay until the seller proves they have performed. The seller does not ship until they know payment is secured. That mutual assurance is what makes LCs so valuable in high-stakes deals.

The Main Types of Letters of Credit

Not all letters of credit work the same way. Here are the most common types your small business is likely to encounter:

Commercial Letter of Credit

This is the standard type used in trade transactions. The buyer’s bank issues the LC, and the seller’s bank confirms it. Once the seller presents the required documents (shipping records, invoices, inspection certificates), the bank releases payment. Most import and export deals use this format.

Standby Letter of Credit

A standby LC works like insurance. It is only triggered if the buyer fails to pay. You set it up as a backstop before the contract begins, and if the buyer defaults, you draw on it. Standby LCs are common in domestic contracts where one party wants payment security without making the transaction feel adversarial.

Revolving Letter of Credit

If you have a recurring relationship with a buyer or supplier and run multiple transactions over time, a revolving LC covers all of them under one agreement. Instead of opening a new LC for each shipment or payment cycle, the revolving structure renews automatically up to a preset limit. This saves time and bank fees on repeat business.

Confirmed Letter of Credit

In international deals, the seller’s local bank adds its own guarantee on top of the foreign buyer’s bank. This is called a confirmed LC. If the overseas bank fails to pay, the seller’s local bank covers it. For small businesses working with buyers in countries with less stable banking systems, this extra layer of protection is worth the small additional fee.

How the Process Actually Works

Here is the step-by-step flow of a typical commercial letter of credit transaction, stripped of the jargon:

1. You negotiate the deal. You and your buyer agree on price, delivery terms, and what documents will prove performance (invoice, shipping bill of lading, inspection certificate, etc.).
2. The buyer applies for the LC. The buyer goes to their bank and requests a letter of credit in your favor. The bank reviews their creditworthiness and issues it.
3. You receive and review the LC. The buyer’s bank sends the LC to your bank. You review it carefully to confirm the conditions are ones you can actually meet. This step is critical. Any term you cannot fulfill gives the buyer a reason to dispute payment later.
4. You perform the contract. You manufacture, ship, or deliver whatever was agreed. You collect all the required documents.
5. You present documents to your bank. You submit the paperwork to your bank within the time limit stated in the LC. Your bank reviews the documents and forwards them to the buyer’s bank.
6. The buyer’s bank pays. If the documents match the LC terms, the bank releases payment to you. No negotiation, no waiting for the buyer to send a wire. The bank handles it.

The entire process typically takes between five and ten business days once documents are submitted, though international transactions can take longer depending on the banks involved.

When Should a Small Business Use a Letter of Credit?

Letters of credit are not necessary for every transaction. They involve setup time, bank fees, and paperwork. But they are the right tool in these situations:

• You are doing business with a new buyer you have not worked with before and the deal is large enough to hurt if they do not pay
• You are importing goods and need the supplier to trust you will pay before they ship
• You are exporting to a country where collecting payment after the fact is difficult or legally complicated
• A large corporate client or government agency requires an LC as a standard part of their vendor payment process
• Your transaction is too large for open credit terms but you want to avoid a full cash-in-advance requirement that could cost you the deal

For everyday domestic transactions with established clients, an LC is usually overkill. But when the stakes are high and trust is low, it is one of the smartest tools you can use. As you build stronger client relationships, you may find you need LCs less often, which is a sign your negotiation skills and reputation are doing the heavy lifting. If you want to sharpen those skills, our guide on negotiation psychology for small business owners is a good next read.

What Does a Letter of Credit Cost?

Banks charge fees for issuing and processing letters of credit. The exact cost depends on your bank, the transaction amount, and the complexity of the terms, but here is a general range:

• Issuance fee: Typically 0.75% to 1.5% of the total transaction value, charged to the buyer
• Confirmation fee: An additional 0.5% to 1% if you need your bank to confirm the LC (common in international deals)
• Document review fee: A flat fee of $50 to $200 per presentation, charged by your bank to review and process the paperwork
• Amendment fee: If you need to change the terms after the LC is issued, expect a $50 to $150 fee per change

On a $100,000 deal, total fees might run $1,000 to $2,500. That is a small price for guaranteed payment security, especially when the alternative is chasing an overseas buyer through foreign courts or writing off a major loss.

For more detail on LC fees and what your bank will require, the SBA’s guide on financing for foreign buyers is a helpful reference, particularly if you are exploring export deals for the first time.

Common Mistakes Small Business Owners Make With Letters of Credit

The biggest risk with letters of credit is not the bank, the buyer, or the deal. It is the paperwork. Banks pay on documents, not on performance. If your documents have any discrepancies compared to what the LC requires, the bank can refuse payment until the issues are resolved. Here are the most common errors to watch for:

Accepting terms you cannot meet

Read the LC carefully before you accept it. If it requires a specific shipping method, inspection certificate, or delivery window that you cannot guarantee, negotiate a change before you start. Once you have accepted the LC, the terms are locked in.

Missing the document submission deadline

Every LC has a presentation deadline, which is the date by which you must submit documents to your bank. Missing it can void the payment guarantee entirely. Track the deadline from the moment you accept the LC.

Document discrepancies

The invoice total does not match the LC amount. The shipping date is one day outside the allowed window. The company name is spelled differently on the bill of lading than on the LC. These small mismatches give banks grounds to refuse payment or delay the process. Use a checklist to review every document against the exact LC terms before you submit.

Not using a trade finance specialist

If you are new to letters of credit, talk to your bank’s trade finance team or a freight forwarder with LC experience before you start. The cost of one hour of expert guidance is nothing compared to the cost of a rejected payment on a six-figure deal.

How to Get Started With a Letter of Credit

If you want to start using letters of credit in your business, here is a simple action plan:

1. Talk to your business bank. Ask if they have a trade finance or international payments department. Most major banks and many regional banks offer LC services. If yours does not, ask for a referral to a bank that does.
2. Get your financials in order. Issuing an LC on behalf of a buyer requires the bank to assess the buyer’s creditworthiness. If you are the seller requesting a standby LC from a client, they will need to show their bank they are good for the amount.
3. Negotiate the LC terms before the contract is signed. Work with your buyer and their bank to draft LC conditions that reflect what you can realistically deliver. Do not agree to a contract first and then try to match the LC to it.
4. Build a document checklist. Before any deal closes, list every document required by the LC and assign responsibility for collecting each one. Treat this like a closing checklist. Learn more about protecting yourself on the contract side by reviewing how to read a business contract without a lawyer.
5. Stay ahead of deadlines. Set internal reminders at least two weeks before the LC presentation deadline. That gives you time to fix any document issues before they become payment problems.

The Bottom Line

A letter of credit is not something every small business needs every day. But if you are growing into larger contracts, exploring international markets, or simply trying to remove the risk of non-payment from high-value deals, it is one of the most effective tools in your financial toolkit. Used correctly, it levels the playing field between small businesses and the larger buyers and suppliers they want to work with.

The key is to understand how they work before you need one. If you wait until you are in the middle of a deal to learn about letters of credit, you will be negotiating under pressure. If you learn how to use them now, you will be ready to close deals with confidence when bigger opportunities come knocking.

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