A standby letter of credit and a bank guarantee do the same economic job: a bank promises to pay a beneficiary if its customer fails to perform, and it pays against a complying demand rather than against proof of the failure. The differences are legal form, the rules each one names (ISP98 or UCP 600 for standbys, URDG 758 for guarantees) and where it is used. In the United States, banks mostly issue standbys, because federal rules limit when a national bank may act as a guarantor.
That last point explains the situation this page is usually read in. A bank in the United States offers a standby letter of credit, and a counterparty abroad has asked for a bank guarantee. Are they the same thing? Economically, close to it. Legally, not quite, and the wording is where the difference lives.
What each instrument is
A standby letter of credit is a letter of credit written to be drawn only if something goes wrong. The bank (the issuer) undertakes to pay the beneficiary when the beneficiary presents the documents the standby asks for, usually a demand and a statement that the applicant has defaulted. The Uniform Commercial Code defines a letter of credit as a definite undertaking by an issuer to a beneficiary, at the request or for the account of an applicant, to honor a documentary presentation by payment. That definition, in UCC section 5-102 (read 2026-09-11), covers standbys as fully as it covers the commercial credits used to pay for shipments.
A demand guarantee, usually called a bank guarantee outside the United States, is a bank's undertaking to pay the beneficiary on a complying demand. The International Chamber of Commerce publishes the Uniform Rules for Demand Guarantees, URDG 758, which the ICC says apply to any guarantee referencing URDG from 1 July 2010, according to its announcement of the rules taking effect (read 2026-09-11). The ICC describes the 35 articles of URDG 758 as setting out the liabilities and responsibilities of each party, the process for presenting a demand, expiry, and how amendments and transfers are handled.
Both are independent undertakings. The bank's obligation does not depend on whether the beneficiary can prove the applicant breached the underlying contract. It depends on whether the demand matches the instrument's terms.
Standby letter of credit vs bank guarantee at a glance
| Standby letter of credit | Demand (bank) guarantee | |
|---|---|---|
| What triggers payment | A complying demand and the documents the standby lists | A complying demand and any supporting statement the guarantee lists |
| Independent of the underlying contract? | Yes | Yes, if written as a demand guarantee |
| ICC or industry rules usually named | ISP98, or UCP 600 | URDG 758 |
| US law that applies | UCC Article 5, as a letter of credit | Depends on the wording and the governing law chosen |
| Where it is most used | United States, and cross-border deals involving US banks | Much of the rest of the world, especially in construction and international tenders |
| Who issues it | A bank, as a letter of credit | A bank, as a guarantee |
Why US banks issue standbys instead of guarantees
This is the part most comparisons skip, and it is the reason the two instruments coexist.
Federal banking rules treat the two powers differently. 12 CFR 7.1016 (read 2026-09-11) allows national banks to issue letters of credit and other independent undertakings within the scope of applicable laws or rules of practice recognized by law, and it names those rules: UCC Article 5, the UCP (including UCP 600), the eUCP, the International Standby Practices (ISP98), and the UN Convention on Independent Guarantees and Stand-by Letters of Credit, among others. The same section expects the bank's undertaking to be limited in amount, limited in time or terminable, and backed by either full collateral or a right to be reimbursed by the applicant.
A guarantee in the traditional sense sits under a different provision. 12 CFR 7.1017 (read 2026-09-11) permits a national bank to act as guarantor or surety in specific situations: where the bank has a substantial interest in the performance of the transaction, or where it takes a segregated deposit from the customer sufficient to cover its total potential liability. It also allows the bank to guarantee customer, subsidiary or affiliate obligations that are financial in character, where the bank's obligation is reasonably ascertainable.
The practical result is a long-standing habit. United States banks usually meet a request for a "bank guarantee" by issuing a standby letter of credit, which they have clear authority to issue, rather than a guarantee. A foreign beneficiary who asked for a guarantee may receive a standby and need to decide whether its wording gives the protection they wanted.
Where the two instruments genuinely differ
Economically close does not mean interchangeable. The differences worth knowing sit in four places.
The rules named in the text. A standby that says it is subject to ISP98 follows rules drafted specifically for standbys. A standby subject to UCP 600 follows rules written mainly for commercial letters of credit, some of which fit awkwardly with a default-triggered instrument. A guarantee subject to URDG 758 follows rules written for guarantees, including how demands are presented and when the guarantee expires. The same event can be handled differently depending on which rulebook the document names.
What a complying demand must contain. URDG 758 requires the demand to be supported by a statement indicating in what respect the applicant is in breach, unless the guarantee excludes that requirement. A standby sets out its own document list. Neither requires the beneficiary to prove the breach, but the paperwork differs.
Independent or accessory. A demand guarantee is independent. Some documents called "guarantees", particularly in some legal systems, are accessory, which means the guarantor can raise the same defenses the applicant could. The title on the document does not settle this; the wording does. This is one of the most important questions for an attorney reviewing a guarantee, because an accessory guarantee is a very different promise.
Law and forum. A standby issued by a US bank will usually be governed by the law of a US state, under Article 5, with the ICC or ISP rules layered on top. A guarantee issued abroad may be governed by that country's law. Where a dispute is heard, and under which law, is part of the negotiation.
How a standby or guarantee connects to the underlying contract
Both instruments back something else: a supply contract, a construction contract, a lease, a loan. They only protect well if the obligation they back is written clearly.
This is why construction and project lenders pay close attention to scope. A performance guarantee that backs "completion of the works" is only as clear as the definition of the works, which is the same concern project managers address with the 100% rule in a work breakdown structure. A vague scope invites argument over whether a demand was justified, even though the bank itself will pay a complying demand regardless.
For payment for goods rather than protection against default, the tool is the commercial letter of credit, and this site's explainer on how a letter of credit works covers the ordinary transaction flow that standbys borrow their legal form from.
What neither instrument does
Neither is funding. A standby or guarantee does not put cash into the applicant's business. It is a contingent promise the bank makes on the applicant's credit, and it sits outside the types of startup funding that bring money in. If the bank pays, the applicant owes the bank, typically under a reimbursement agreement signed when the instrument was issued.
Neither protects the applicant from an unfair demand. Because both are independent, a bank faced with a complying demand generally pays and leaves the applicant to pursue the beneficiary under the underlying contract. US law gives limited grounds to stop payment on a letter of credit, and they are narrow by design. That risk is the price of the beneficiary's protection, and it is why applicants pay close attention to the demand conditions before the instrument is issued.
Neither is the same as a surety bond. A surety bond, common in US construction, is usually issued by a surety company, and a surety typically investigates a claim and may raise the contractor's defenses before paying. That is a different allocation of risk from a demand instrument, and the choice between them is often set by the contract or by public procurement rules rather than by the parties.
Neither has a standard price. Banks set fees by applicant, amount, tenor, collateral and country. This page quotes no figure because any number would describe someone else's deal.
FAQ
Is a standby letter of credit the same as a bank guarantee? They serve the same purpose and both pay against a complying demand, but they are different legal instruments. A standby is a letter of credit, usually subject to ISP98 or UCP 600 and, in the United States, to UCC Article 5. A demand guarantee usually names URDG 758. Whether a standby satisfies a contract that asks for a guarantee depends on the contract's wording.
Why won't a US bank issue a bank guarantee? Federal rules allow national banks to issue letters of credit and independent undertakings under 12 CFR 7.1016, but limit acting as guarantor or surety to the circumstances in 12 CFR 7.1017, such as holding a segregated deposit that covers the full potential liability. Many US banks therefore issue a standby letter of credit where a guarantee is requested.
Does the beneficiary have to prove the default? Not to the bank, if the instrument is independent. The bank checks whether the demand and any required statements match the instrument's terms. Whether the default actually happened is a question under the underlying contract, between the parties.
Who reviews the wording of a standby or guarantee? The bank's trade finance team drafts or reviews it against its own policies, and an attorney who works on the underlying contract type reviews it for the client. The rules named in the text, the demand conditions, expiry and governing law are the terms that most often need attention.
The short version
A standby letter of credit and a bank guarantee both let a beneficiary draw on a bank if the applicant fails to perform, without proving the failure. The standby is the US form, because federal rules make letters of credit the power US banks clearly have. The guarantee is the international form, typically under URDG 758. The real differences are in the rules named, the demand requirements, whether the instrument is truly independent, and the governing law. This page explains those differences as the named rules and regulations state them; it is not legal or financial advice, and the wording of any specific instrument belongs with a bank's trade finance team and an attorney.