Bank guarantee (BG): the types, how it works, and BG vs LC

A bank guarantee lets one party do business with another without losing sleep over "what if they do not deliver?" or "what if they do not pay?". The bank steps in with its own promise: if you (the bank's customer) fail to keep your side of a deal, the bank will pay the other side a fixed amount. That single promise is what lets a small contractor bid on a government project, or lets a buyer safely pay an advance to a supplier.

This guide explains bank guarantees in plain English: what a BG is, how it works step by step, every common type (performance, financial, advance payment, bid bond, deferred payment, foreign), how it differs from a letter of credit, what it costs, and what happens when a guarantee is invoked. Two examples run through the article:

• Contractor example: Meru Constructions in Vadodara bids for a ₹50 crore government road contract. The government department wants guarantees that Meru will honour its bid and finish the road.
• Supplier example: Surat Textiles receives a large advance from a foreign buyer and must assure the buyer that the advance is safe if the goods are not delivered.

What is a bank guarantee?

A bank guarantee (BG) is a written undertaking by a bank to pay a stated sum to a beneficiary if the bank's customer (the applicant) fails to meet an agreed obligation. The obligation might be to finish a construction project, to repay an advance, to pay dues to a government authority, or to honour a tender bid. The bank's promise is secondary: it is triggered only if the applicant defaults. As long as the applicant performs, the guarantee simply expires unused.

That "used only on default" nature is the whole point. In the contractor example, the government does not expect to claim the guarantee; it wants the guarantee to exist so that Meru has skin in the game and the government has a quick remedy if the road is abandoned. A BG converts "I hope this contractor is reliable" into "if they are not, my bank claim pays out".

A BG is a non-fund-based facility: the bank does not hand out cash upfront, it lends its name and its promise. But it is still a real exposure on the applicant, because the bank may have to pay later. So the bank sanctions a BG limit, takes a margin, and charges a commission, all covered below.

How a bank guarantee works, step by step

Take the contractor example end to end:

1. Requirement. The government tender says bidders must submit a bid bond (earnest money guarantee), and the winner must give a 10% performance guarantee.
2. Application. Meru Constructions applies to its bank for the guarantee, giving the format the beneficiary requires, the amount, and the validity period.
3. Assessment and margin. The bank checks Meru's BG limit and financials, takes a margin (say cash or a fixed deposit for part of the value), and blocks the amount against Meru's non-fund limit.
4. Issuance. The bank issues the guarantee on stamp paper (or electronically) in the beneficiary's favour and delivers it to the government department.
5. Performance. Meru does the work. If all goes well, the guarantee lapses at the end of its validity and claim period, and the bank releases the margin. Nothing is paid out.
6. Default and invocation (only if it goes wrong). If Meru abandons the road, the government invokes the guarantee: it makes a written claim within the validity. Under an unconditional guarantee, the bank pays without getting into the dispute, then recovers from Meru.

The supplier example is the same shape with a different trigger. When Surat Textiles receives an advance from its foreign buyer, Surat's bank issues an advance payment guarantee to the buyer. If Surat takes the advance but fails to ship, the buyer claims the advance back from the bank.

Types of bank guarantee

Most bank guarantees are one of a handful of standard types. The name tells you what obligation is being secured.

Cutting across all of these is one more distinction that matters a great deal in practice:

• Unconditional (on-demand) guarantee: the bank pays on the beneficiary's simple written demand, without proof of loss or the applicant's agreement. Most government and commercial BGs in India are unconditional. Powerful for the beneficiary, riskier for the applicant.
• Conditional guarantee: the bank pays only if the beneficiary produces specified evidence of default. Safer for the applicant, but beneficiaries usually resist it.

Performance guarantee vs financial guarantee

These two are the ones people most often mix up, and they are genuinely different in what they promise.

• A performance guarantee answers "will the work get done?". If Meru Constructions fails to build the road to spec, the government invokes the performance guarantee to fund getting it finished by someone else. It backs performance.
• A financial guarantee answers "will the money get paid?". It assures a straightforward payment obligation, for example that a company will pay a duty, a deposit, or a sum due to an authority. It backs payment.

Banks often price financial guarantees a little higher, because a pure money obligation is more likely to be called than a performance one where the applicant is actively working to deliver.

Bank guarantee vs letter of credit

This is the single most searched question about BGs, and the answer is simpler than it looks once you hold on to one idea: a letter of credit is expected to be used; a bank guarantee is expected not to be.

A letter of credit is a payment mechanism. In the normal course of a trade, the seller ships, presents documents, and the bank pays. The LC is the main way the deal settles. A bank guarantee is a safety net. In the normal course, nothing happens under it; it pays only if the other party fails. One settles the transaction, the other stands behind it.

So in the same infrastructure project, both can appear: the contractor gives the employer a performance BG, while a materials supplier to the contractor might sell against a letter of credit. They are not competitors; they solve different problems.

How to get a bank guarantee: process, margin and security

Getting a BG issued is quicker than most people expect, once you have a limit in place.

• BG limit. Your bank sanctions a non-fund-based limit for guarantees, usually as part of your overall working capital assessment. Each BG you ask for is carved out of this limit.
• Margin. The bank holds a margin against the BG, often as a fixed deposit, typically a percentage of the BG value (it varies with the type, your relationship, and the risk). A financial guarantee may attract a higher margin than a performance one.
• Counter-indemnity. You sign a counter-indemnity letting the bank recover from you (and debit your account) if the guarantee is invoked.
• The format. The beneficiary usually prescribes the exact wording. Read it: an unconditional, auto-renewing format with a long claim period is very different from a conditional one.
• Stamping. Guarantees are executed on stamp paper (or e-stamped) as per the applicable stamp duty.

Bank guarantee charges

A BG is not free even though no money changes hands upfront, because the bank is carrying a contingent exposure. The charges usually include:

• Guarantee commission: a percentage of the BG value, charged per year or part-year for the validity plus the claim period. This is the main cost.
• Issuance / processing fee: a one-time charge to set up the guarantee.
• Stamp duty: on the guarantee document, as per state rates.
• Amendment charges: for any change (amount, validity, wording) after issuance.
• Invocation charges: if the guarantee is claimed.
• Margin cost: the opportunity cost of the funds or FD held as margin.

The real cost of a BG is the commission plus the margin cost across the full validity and claim period, so a guarantee with an unnecessarily long validity quietly costs more. Trim the validity and claim period to what the contract actually needs.

Invocation, expiry and the claim period

Two dates decide a guarantee's life: the validity date (up to which the applicant's obligation is covered) and the claim period (extra time after validity within which the beneficiary can still lodge a claim). A beneficiary must invoke within the claim period, or the guarantee dies and the bank is released.

Under an unconditional guarantee, once the beneficiary makes a valid written demand within time, the bank must pay, even if the applicant disputes the default. Indian courts generally restrain payment only in narrow cases such as clear fraud or irretrievable injustice; a mere commercial dispute is not enough to stop an on-demand guarantee. That is exactly why applicants must take the wording seriously before it is issued.

An unconditional bank guarantee is as good as cash to the beneficiary. The time to negotiate its wording, its amount, and how long it stays alive is before it is issued, not after it is invoked.

Practical discipline

A few habits keep guarantees from turning into surprises:

• Read the format before issuance. Watch for auto-renewal ("shall be extended on demand") and long claim periods that keep your margin locked.
• Match the BG amount and validity to the contract; do not accept round-number padding.
• Diarise the validity and claim-period dates, and chase the return or cancellation of the original guarantee once the obligation is over, so the bank releases your margin and stops charging commission.
• For overseas beneficiaries, understand whether it is a direct guarantee or a local guarantee on your bank's counter-guarantee, the cost and the wording differ.
• Keep a register of live guarantees, amounts, expiries and margins. On a busy contracting book, forgotten BGs tie up real money.

Used well, a bank guarantee is what lets a mid-sized company win work and take advances it otherwise could not: it rents the bank's credibility for a small commission. Used carelessly, it is a stack of unconditional promises with your margin locked behind them, quietly costing you until someone remembers to cancel them.

Frequently asked questions

What is a bank guarantee in simple words?

It is a bank promising to pay the other party if you fail to keep your side of a deal. The bank pays only if you default, so the other party is protected against non-performance or non-payment.

What is the difference between a bank guarantee and a letter of credit?

A letter of credit is a payment tool that pays the seller in the normal course of a trade. A bank guarantee is a safety net that pays only if the applicant defaults. An LC is expected to be used; a BG is expected not to be.

What is a performance guarantee?

A bank guarantee that assures a contract or job will be completed. If the contractor fails, the beneficiary claims the guaranteed amount (often 5% to 10% of the contract value).

What is an advance payment guarantee?

A guarantee that secures an advance the beneficiary pays to the applicant. If the applicant does not deliver, the beneficiary recovers the advance from the bank. It usually reduces as the work progresses.

What are the charges for a bank guarantee?

Mainly a guarantee commission (a percentage of the BG value per year or part-year), plus a one-time issuance fee, stamp duty, and possible amendment and invocation charges, along with the cost of the margin the bank holds.

What does invocation of a bank guarantee mean?

It is the beneficiary formally claiming payment, stating the applicant has defaulted. Under an unconditional guarantee, the bank must pay a valid demand made within the claim period without investigating the dispute.

Note: This article is a general explainer on how bank guarantees work in India. It is not legal or financial advice. Guarantee wording, margins, charges, stamp duty and the applicable rules vary by bank, by state and by transaction. Confirm the specifics with your banker and your advisor before relying on any guarantee.