Bank guarantees and letters of credit are both non-fund-based banking facilities, but they solve different commercial problems. A bank guarantee primarily protects a beneficiary if the bank's customer fails to meet a contractual or financial obligation. A letter of credit is primarily a payment mechanism used in a trade transaction: the issuing bank undertakes to pay against compliant documents under the LC terms.
RBI's Master Circular on Guarantees and Co-acceptances treats guarantees and letters of credit as contingent-liability commitments and contains separate safeguards for guarantee business and letters of credit. For finance teams, the key is to choose the instrument that matches the underlying risk rather than treating BG and LC as interchangeable bank limits.
What is a bank guarantee?
In a bank guarantee, the bank issues a commitment on behalf of its customer in favour of a beneficiary. If the customer fails to perform or pay in accordance with the guarantee terms and the guarantee is validly invoked, the bank may have to honour the commitment. RBI's guidance recognises both financial guarantees and performance guarantees.
A financial guarantee supports a payment obligation. A performance guarantee supports performance of a contractual obligation. RBI specifically advises banks to exercise due caution with performance guarantees and to assess whether the customer has the experience, capacity and means to perform the underlying contract.
What is a letter of credit?
A letter of credit is commonly used to support payment in a genuine commercial or trade transaction. The buyer arranges the LC through its bank in favour of the seller. The seller presents the documents required by the LC, and payment or acceptance depends on compliance with the LC terms.
RBI's circular requires banks to observe safeguards in opening and handling LCs and links LC facilities to genuine commercial and trade transactions. The practical focus is therefore documentary compliance and payment against the agreed LC conditions.
Bank guarantee vs letter of credit: the practical difference
- Primary purpose: an LC facilitates payment in a trade transaction; a BG protects the beneficiary against specified default or non-performance.
- Expected use: an LC is designed to operate as the agreed payment route when compliant documents are presented. A BG is generally expected to remain contingent and becomes payable when the guaranteed obligation fails and the guarantee is invoked according to its terms.
- Underlying risk: an LC commonly addresses seller payment risk and buyer-bank credit support in trade. A BG commonly addresses contractual performance or payment-default risk.
- Documents: LC payment turns heavily on presentation of documents specified in the credit. A BG claim turns on the invocation conditions written into the guarantee.
- Accounting and treasury view: both can create contingent or non-fund-based exposure, but finance teams should track them separately because triggers, expiry dates, claims and commercial purposes differ.
Common types of bank guarantees
Businesses frequently encounter bid guarantees, performance guarantees, advance-payment guarantees and financial guarantees. The label alone is not enough: the finance and legal teams should read the actual guarantee wording, beneficiary, amount, validity, invocation clause and underlying contract.
RBI's guidance also stresses that guarantees contain inherent risk. Banks are expected to assess a customer's ability to reimburse the bank if a financial guarantee is invoked, and in performance-guarantee cases to assess the customer's capability to perform the contract.
Example: machinery purchase using an LC
Assume an Indian manufacturer purchases machinery from a supplier and the seller wants bank-backed assurance of payment against specified shipping and commercial documents. An LC can be suitable because the commercial objective is to establish a documentary payment mechanism. The buyer, seller and banks agree the required documents and LC terms; the seller then presents documents for examination under the credit.
Example: contractor performance backed by a BG
Assume a contractor wins a project and the customer requires security that contractual performance obligations will be met. A performance bank guarantee can be appropriate. The guarantee is not intended to replace normal invoice payment; it provides the beneficiary with bank-backed recourse if the guaranteed performance obligation fails and the invocation conditions are satisfied.
How should a finance team choose between BG and LC?
- Identify the commercial objective: if the main problem is payment against trade documents, consider an LC. If the main problem is protection against default or non-performance, consider a BG.
- Read the underlying contract first: the banking instrument should match the contract's payment, delivery, performance and security clauses.
- Check the trigger: determine what must happen before the bank becomes liable and what documents or declarations are required.
- Review amount and validity: avoid a facility that remains open longer or for a higher amount than the commercial exposure requires.
- Understand margin and limit usage: the issuing bank may require sanctioned non-fund-based limits, margin, collateral or other credit support based on its appraisal and policy.
- Build expiry controls: record issue date, expiry date, claim period where applicable, amendments and closure evidence in a central register.
Controls for bank guarantees
For BGs, the beneficiary should verify genuineness with the issuing bank. RBI's master circular specifically notes safeguards aimed at preventing fake guarantees and says beneficiaries should be cautioned to verify the guarantee with the issuing bank. Internally, businesses should also reconcile outstanding guarantees to bank confirmations and contracts.
Before accepting or issuing a BG, review whether it is conditional or unconditional, the exact invocation wording, governing contract, expiry, claim requirements and reduction or release mechanism. Commercial teams should avoid casually agreeing to open-ended wording without finance and legal review.
Controls for letters of credit
For LCs, operational discipline begins before issuance. The purchase order or sales contract should align with the LC on amount, currency, shipment terms, expiry, required documents and payment terms. Documentary conditions should be objectively capable of being satisfied; unnecessary or ambiguous document requirements increase discrepancy risk.
Finance teams should also distinguish the LC's commercial terms from the bank's sanctioned facility. Amendments, extensions and increases can consume additional limits or charges and should follow the same approval discipline as the original LC.
Common mistakes
- Using “BG” and “LC” interchangeably in contracts even though their payment triggers are different.
- Accepting a guarantee without independently verifying its authenticity with the issuing bank.
- Ignoring expiry and claim-period controls, causing facilities to remain outstanding in internal records.
- Drafting an LC with document conditions that do not match the actual shipment or commercial process.
- Assuming a non-fund-based facility has no cash-flow risk: an invoked BG or crystallised LC obligation can become a funded liability.
- Choosing the instrument only on bank charges rather than on the commercial risk it is meant to address.
Practical takeaway
Use a letter of credit when the transaction needs a bank-backed documentary payment mechanism, and use a bank guarantee when the beneficiary needs protection against a specified payment or performance default. Both are non-fund-based facilities from a banking perspective, but their triggers and commercial functions are materially different. Finance teams should map the instrument to the underlying contract, verify wording and authenticity, track expiry and amendments, and understand how invocation or payment can convert a contingent exposure into an actual cash obligation.
