Commercial Banking And Trade Instruments
Difference Between A Letter Of Credit And A Line Of Credit
A letter of credit and a line of credit are not interchangeable. The first is a bank promise tied to a transaction. The second is a lending facility that gives a borrower access to cash. Many companies use the wrong term when speaking to banks, suppliers, or brokers, and that creates confusion from the start. If you understand the difference clearly, you can ask for the right product, prepare the right documents, and avoid wasting time with the wrong underwriting team.
Why People Mix Them Up
The confusion comes from the word “credit.” In both cases a bank is taking risk. In both cases the bank is evaluating the applicant’s strength. In both cases a credit line may be allocated internally. That is where the similarity ends. A letter of credit is built around a specific commercial transaction and documentary conditions. A line of credit is built around a borrower’s ongoing funding needs and repayment capacity.
Common mistake:
a buyer tells a supplier, “We have a line of credit,” as if that solves the supplier’s payment risk. It usually does not. A supplier often wants a bank-issued letter of credit because it shifts payment reliance from the buyer to the bank.
What A Letter Of Credit Is
A letter of credit is a bank instrument used to support payment in a transaction. It is common in imports, exports, commodity trades, equipment purchases, and other deals where the seller wants bank-backed comfort before shipping goods or performing obligations.
Under a documentary letter of credit, the bank does not pay because the buyer says the goods are acceptable. The bank pays when the beneficiary presents documents that comply with the terms of the credit. That is a major point many non-bank clients miss. The bank is looking at documents, not broad commercial arguments.
In plain language:
a letter of credit is mainly a payment assurance tool. It does not hand the buyer a pot of cash to spend freely.
What A Line Of Credit Is
A line of credit is a revolving borrowing facility. The lender approves a limit, the borrower draws funds when needed, repays them, and draws again subject to the facility terms. Businesses use lines of credit for payroll, supplier payments, inventory build-up, seasonal working capital swings, and short-term cash flow gaps.
A line of credit can be secured or unsecured. It may be based on cash flow, collateral, receivables, inventory, or a mix of factors. Unlike a letter of credit, the borrower actually receives money when funds are drawn.
Side-By-Side Difference
| Point Of Difference |
Letter Of Credit |
Line Of Credit |
| Main purpose |
Supports payment in a defined transaction |
Provides ongoing access to borrowed funds |
| Who relies on it |
Usually the seller, exporter, or beneficiary |
The borrower using the facility |
| Cash disbursement |
No unrestricted cash to the applicant |
Borrower can draw cash up to the approved limit |
| Bank focus |
Document compliance, transaction structure, counterparties |
Repayment ability, leverage, liquidity, collateral |
| Typical use case |
Imports, exports, supplier comfort, performance support |
Working capital, operating expenses, short-term liquidity |
| Legal framework |
Often subject to LC rules and instrument wording |
Standard loan or revolving credit documentation |
When A Letter Of Credit Makes Sense
Cross-border purchases
When a buyer is purchasing goods from an unfamiliar seller in another country, a letter of credit can reduce trust friction and give the seller comfort to ship.
Shipment-linked transactions
If payment depends on presentation of invoices, transport documents, inspection certificates, or similar documents, a letter of credit is often the right fit.
Supplier requirements
Some suppliers will not start production or release cargo without bank-backed payment security. A general borrowing facility does not answer that requirement.
Performance support
Certain transactions call for standby-type support where a bank instrument backs obligations if the applicant fails to perform or pay.
When A Line Of Credit Makes Sense
Working capital pressure
If the business is sound but cash collection lags behind expenses, a revolving line of credit can smooth daily operations.
Seasonal inventory
Companies that buy stock before peak sales periods often use a line of credit to bridge the gap between purchase and collection.
Short-term liquidity management
A line of credit is often used for payroll, VAT timing issues, supplier payments, and other ordinary-course cash needs.
Recurring business use
If the funding need repeats over time rather than linking to one shipment or one transaction, a line of credit is often more suitable.
How Banks Underwrite Them Differently
This is where the difference becomes sharp. For a line of credit, the bank studies the borrower’s balance sheet, income statement, cash flow profile, leverage, liquidity, collateral, and repayment track record. The question is simple: can this borrower draw money and pay it back?
For a letter of credit, the bank still looks at the applicant’s strength, but it also studies the underlying trade or commercial transaction. It wants to know what is being bought or sold, who the counterparties are, what documents will trigger payment, and whether the wording is workable. In other words, one is broad borrower underwriting, the other is borrower underwriting plus instrument structuring and transaction control.
Practical takeaway:
if you walk into a bank asking for a “credit line” when what you actually need is a documentary instrument for a supplier, you can end up in the wrong internal lane from day one.
Real-World Example
Imagine a company importing machinery from overseas. The supplier wants payment comfort before shipment. A line of credit may help the buyer with general liquidity, but it does not automatically reassure the supplier. A letter of credit, by contrast, gives the supplier a bank-backed payment mechanism tied to the agreed documents. That is why the supplier may accept the sale under an LC and reject the buyer’s statement that it has a revolving facility.
Now flip the situation. Imagine a distributor that already has reliable suppliers but keeps hitting short-term cash squeezes while waiting for customers to pay. That company usually does not need an LC for every transaction. It needs working capital access. That is where a line of credit is the better product.
What Businesses Should Ask Before Choosing
- Is the problem payment assurance or cash availability?
That question alone clears up most confusion.
- Is there a specific transaction with document conditions?
That points toward a letter of credit.
- Is the need recurring and operational?
That points toward a line of credit.
- Does the counterparty want a bank instrument?
If yes, a line of credit is usually not enough.
- Does the borrower actually need funds in its own account?
If yes, that is generally a lending question, not an LC question.
Need Help Structuring The Right Banking Product?
If your transaction requires a letter of credit, standby letter of credit, or another structured instrument, the request needs to match the commercial purpose and the bank’s underwriting logic. If the issue is working capital, the solution may be a revolving facility instead. We help clients frame requests properly before they waste time with the wrong structure.
Frequently Asked Questions
What is the main difference between a letter of credit and a line of credit?
A letter of credit mainly gives payment assurance in a transaction. A line of credit mainly gives the borrower access to funds for business use.
Is a letter of credit the same as a loan?
No. A letter of credit is not the same as a standard loan. It is a bank undertaking tied to conditions and documents, not unrestricted cash advanced to the applicant.
Can a line of credit replace a letter of credit?
Usually not. A supplier or beneficiary that wants a bank-backed payment instrument is asking for a specific kind of risk protection that a revolving facility does not automatically provide.
Do letters of credit affect a company’s banking limits?
Yes. Banks often allocate credit exposure to letters of credit because they create contingent liabilities, even if cash is not immediately advanced.
When should a business ask for a line of credit instead?
When the problem is recurring working capital pressure, uneven collections, seasonal stock purchases, or day-to-day liquidity rather than supplier payment assurance.
Why do banks treat these products differently?
Because the risk is different. One depends heavily on transaction structure and documents. The other depends mainly on repayment strength, leverage, liquidity, and collateral.