A letter of credit is not a loan. When a bank issues one, it makes a written promise to pay a third party if specified conditions are met; no money leaves the bank and none enters your account on day one. You carry a contingent obligation, not an active debt. That answer is clean at the start, but it gets more interesting once the guarantee is actually called, because at that point a letter of credit can turn into borrowing very quickly.
What Actually Changes Hands, and When
A loan is funded debt. The bank transfers cash to your account, books an asset, and interest starts running immediately on the full principal. A letter of credit is contingent. The Uniform Commercial Code defines it as a “definite undertaking” by an issuer to honor a documentary presentation by payment or delivery of value, but only when someone actually presents the right documents.1Legal Information Institute. Uniform Commercial Code 5-102 – Definitions Until that presentation happens, the bank hasn’t spent a dollar on your behalf.
Because no funds have been disbursed, the instrument sits off-balance-sheet as a contingent liability. U.S. accounting standards require companies to disclose these commitments in the footnotes of their financial statements rather than record them as direct liabilities. A loan, by contrast, appears on the balance sheet as a liability the moment funds land in your account.
The pricing works differently, too. Loan interest accrues on the full principal from the funding date. Letter of credit fees are typically a percentage of the face value, often somewhere between 0.75% and 1.5% annually, though applicants with weaker credit profiles or more complex transactions can pay more. You’re paying for the bank’s promise, not for the use of its money.
When a Letter of Credit Starts Behaving Like a Loan
The moment the bank honors a draw, the contingent promise becomes real debt. The bank has spent its own money and now holds a reimbursement claim against you. That claim is governed by a separate reimbursement agreement signed when the credit was originally issued, which typically authorizes the bank to debit your account for the full amount paid plus fees.
If you don’t have the cash to reimburse the bank immediately, many reimbursement agreements let the bank convert the outstanding amount into a short-term loan at an elevated interest rate. At that point you are borrowing from the bank and paying interest, just like any other debtor. The difference is that the borrowing happened because a guarantee was called, not because you originally asked for cash.
Failure to reimburse gives the bank the same remedies available to any secured lender: pursuing collateral pledged under the credit agreement, demanding payment under any personal guarantees, and initiating legal proceedings to recover the debt. So while the instrument is not a loan at issuance, it can become one at draw, and it can become an unpaid loan with collection consequences after that.
How It Affects Your Borrowing Capacity Before Any Draw
Even though no money has changed hands, an outstanding letter of credit reduces the credit available to you. Banks evaluate total exposure by adding up loans and contingent commitments together. If your business has a $500,000 credit facility and the bank issues a $100,000 letter of credit against it, you can borrow only the remaining $400,000. Those funds are earmarked to cover a potential payout.
From the bank’s side, regulators require capital to be held against these contingent obligations. A financial standby letter of credit carries a 100% credit conversion factor, meaning the bank must treat the full face value as if it were a funded loan when calculating its capital requirements. Performance standby credits receive a 50% conversion factor, and short-term trade-related instruments get 20%.2eCFR. 12 CFR 324.33 – Off-Balance Sheet Exposures Those regulatory costs get passed along to applicants as fees, and they explain why banks scrutinize letter of credit applications with roughly the same rigor they apply to loan requests.
A business that loads up on contingent commitments without tracking their impact on available borrowing can find itself short of operating capital exactly when it needs credit most. The accounting keeps these obligations off the balance sheet; your banker does not.
Commercial vs. Standby: Whether a Payout Is Expected
Whether a letter of credit is likely to convert into actual debt depends heavily on which type you’re using.
Commercial Letters of Credit
A commercial letter of credit is a payment mechanism. It’s the classic instrument of international trade: a buyer arranges for a bank to pay the seller when the seller ships goods and presents documents proving the shipment happened. The expectation is that the bank will be called upon to pay. The beneficiary presents shipping documents, the bank verifies them, and payment flows. These instruments are designed to be drawn on as a matter of course.
Standby Letters of Credit
A standby letter of credit works more like an insurance policy. It sits in the background and gets activated only if someone fails to perform. A contractor might post one on a construction project to guarantee they’ll finish the work. A tenant might provide one to a landlord instead of a cash security deposit. If the contractor finishes the job or the tenant pays rent on time, the credit is never drawn.
Some standby credits include an evergreen clause that automatically renews the credit at the end of each term, usually annually, unless the issuing bank gives notice that it won’t extend. This is common in real estate leases and long-term performance guarantees where the underlying obligation stretches across multiple years.
The practical upshot: a commercial credit almost certainly turns into a reimbursement obligation on schedule, while a standby credit may never be touched. Both are contingent at issuance, but the odds of a draw differ sharply.
Collateral Looks a Lot Like Loan Collateral
Banks issuing letters of credit typically require collateral, just as they would for a loan. The specific requirements depend on your creditworthiness and the bank’s internal policies. Common forms include cash deposits in segregated accounts, U.S. government securities, and other liquid assets. Applicants with strong credit histories and established banking relationships may get the credit issued against a general credit line without additional security.
Federal regulations governing transactions between affiliated banks and their parent companies prescribe minimum collateral values ranging from 100% of the transaction amount for U.S. government obligations up to 130% for stock and real property.3eCFR. 12 CFR 223.14 – What Are the Collateral Requirements for a Credit Transaction With an Affiliate Those specific ratios apply to interaffiliate transactions rather than ordinary commercial credits, but they illustrate the principle: banks demand more collateral for less liquid assets. A letter of credit itself does not qualify as eligible collateral under those same rules, which reinforces the point that the instrument represents contingent risk rather than tangible security.
The Short Answer, Restated
A letter of credit is not a loan on the day it’s issued. No cash moves, no interest accrues on principal, and the obligation lives in the footnotes rather than on the balance sheet. But it can become a loan the instant it is drawn and you cannot reimburse the bank in cash, and it consumes borrowing capacity from the day it is issued regardless of whether it is ever called. Treat it as contingent debt on paper and as a real claim on your credit line in practice.