What is a bank guarantee?

Claudia AinsleyWritten byClaudia Ainsley
Reviewed byMatt Leeburn
Updated 26 Aug 2026

A bank guarantee is a written promise from a bank to pay a set amount to a third party if its customer does not meet an obligation.

Also known as: banker's guarantee, letter of guarantee, guarantee facility

Key points

  • It is most often used in place of a cash bond on a commercial lease, so a tenant keeps its working capital.
  • No money changes hands upfront: the bank pays only if the party holding the document calls on it.
  • Banks normally take security for the full amount, usually cash on deposit or a charge over property.
  • Fees run for as long as the document stays on foot, and many have no expiry until the original is returned.
  • The facility is a contingent liability: it ties up security, uses part of your bank limit and counts when other lenders assess you.

How a bank guarantee works

Where bank guarantees are used

Example

Not to be confused with

Personal guarantee
a personal guarantee is an individual promising to cover a business debt, not a bank promising to pay
Security deposit
a security deposit is cash handed over upfront; this is a promise to pay if called on

Frequently asked questions

How does a bank guarantee work?

Your bank issues a signed document to a third party, promising to pay a stated amount if you fail to meet an obligation such as rent. The bank usually holds security for that amount. If nothing goes wrong, no money is ever paid and the document is returned for cancellation.

How much does a bank guarantee cost?

Banks charge an establishment fee and an ongoing fee, generally worked out as a percentage of the amount covered and charged for as long as the facility stays open. The bigger cost is often the cash you have to leave on deposit as security. Ask the bank for the full fee schedule.

Is a bank guarantee the same as a letter of credit?

They are close cousins. A letter of credit is designed to be drawn on as part of normal trade, usually to pay an exporter once documents are presented. A bank guarantee is meant to sit unused and only pays if something goes wrong, which makes it a backstop rather than a payment method.

How do I cancel a bank guarantee?

Most have no expiry date, so the bank will only cancel once the beneficiary returns the original document or provides a written release. That means asking the landlord or contract holder directly. Until it comes back, the fees keep running and your security stays tied up.

Do I need security for a bank guarantee?

Almost always. Banks commonly require cash held on term deposit for the full amount, or a charge over property. Some established businesses can arrange one against an existing facility limit instead. Either way the bank assesses your position first, because it is taking on real credit risk.

Broader term: Guarantee

Go deeper

Sources

This article is general information only and is not financial advice.