Bank Guarantee Cost Calculator

A guarantee carries two costs, and only one of them is a fee.

Commission is cash leaving your account. The bank charges it on the face value of the guarantee, for the period the guarantee stays live.

Margin money is cash you still own but cannot use. The bank holds it, usually as a lien marked deposit, from issue until the guarantee is released. It is not an expense, but it is out of your working cycle for the whole period, and that has a price.

Where each input comes from:

• The guarantee amount comes from a clause, not from a norm. Performance security is a percentage of contract value stated in your contract, and it varies by department and by contract, so read it. Where a notice permits earnest money to be furnished as a bank guarantee, the amount is the EMD the notice states.
• The commission rate and the margin percentage come from your own sanction letter and your bank's schedule of charges. They are set on your credit standing and the security offered, so two firms bidding the same tender rarely pay the same.
• The period comes from the validity the contract demands, not from your construction programme.

There is a third cost the arithmetic cannot show. Every guarantee consumes non-fund-based limit, and the limit it consumes is the guarantee you cannot issue for the next tender.

Four steps, all of them arithmetic you can check.

1. Commission. Guarantee amount x commission rate per annum x chargeable months / 12. Round the chargeable months up to your bank's charging unit first. Many banks charge per quarter or part of a quarter, so a guarantee live for 25 months is billed as 9 quarters, which is 27 months of commission.

1. Chargeable months. Contract period, plus the defect liability period, plus the claim period the buyer's guarantee format adds after expiry. Banks commonly charge for the claim period as well, because their liability runs through it. Confirm the basis with your branch.

1. Margin money locked. Guarantee amount x margin percentage from your sanction. This is a transfer from usable cash to locked cash, not an expense.

1. Cost of the locked margin. Margin amount x your net cost of capital x months held / 12. Net is the word that matters. If the margin sits in a lien marked fixed deposit that pays interest, the real cost is the gap between what that capital would have earned or saved in the business and what the deposit pays you. Putting your full borrowing rate in overstates it.

Total cost of the guarantee is step 1 plus step 4. Divide that by contract value to get the figure your bid build up actually needs. Nothing you type here leaves your browser.

Bidders argue about the performance security percentage and ignore the duration, which is the multiplier on both costs.

On illustrative inputs, a guarantee of Rs 5,00,000 at 2% per annum commission, 25% margin and a 6% per annum net cost of capital:

• Live for 12 months: commission Rs 10,000, margin cost Rs 7,500, total Rs 17,500.
• Live for 27 months, being a 12 month contract plus a 12 month defect liability period plus a 3 month claim period: commission Rs 22,500, margin cost Rs 16,875, total Rs 39,375.
• Live for 39 months, the same guarantee on a 24 month contract: commission Rs 32,500, margin cost Rs 24,375, total Rs 56,875.

Same guarantee, same rates, more than three times the cost, purely because of how long the contract keeps it alive.

Two consequences follow. A contract with a long defect liability period is more expensive to carry than a shorter one of the same value, and that belongs in the price. And an extension of time extends the guarantee, so the bank charges again for the added months. Delay therefore costs twice, once in guarantee cost and once in liquidated damages.

Most disagreements about the answer come down to one of these.

• Entering contract value instead of guarantee value. The commission is charged on the face value of the guarantee, not on the contract it secures.
• Costing the construction period only. The guarantee outlives the work by the defect liability period and the claim period. That tail is usually the larger part of the bill.
• Treating margin money as a fee. It is not spent, it is locked. Counting it as an expense overstates the cost; ignoring it entirely understates it, which is the more common error.
• Using a gross borrowing rate for the margin when the margin is held in an interest bearing deposit. Use the net rate, as above.
• Assuming commission is billed annually in arrears. Many banks recover it upfront for the whole validity at issue, which puts the full amount on your cash flow at award, alongside mobilisation.
• Taking a rate off a website. The commission rate and margin on your sanction letter are the only ones that apply to you, and margin can range from a small percentage to full cash cover.
• Stopping the clock on the day the work is certified complete. The cost runs to the day the lien is actually lifted, which is a different and usually later date.

The calculator prices commission and locked capital. Add these separately before you treat the total as your real outlay.

• Stamp duty. A bank guarantee is an instrument executed on stamped paper and liable to stamp duty under the Indian Stamp Act 1899 as it applies in your state, so the amount varies by state. The branch will tell you what it will charge.
• GST on the bank's commission and charges, at the rate in force on banking services. Whether it is a cost or an input tax credit depends on your registration and the use.
• One off issuance or processing charges, and a fresh charge for every amendment, extension or reissue on the beneficiary's own format.

Two things the number cannot tell you. It is a cost model, not a risk model: a guarantee in the standard government format is payable on demand, so invocation takes the full face value and leaves you to argue afterwards. And it does not settle whether the contract is worth bidding for. For that, add the earnest money you will carry, computed in the EMD calculator, and the retention held through the defect liability period, covered in retention money in government contracts.

One exemption people misread: the Public Procurement Policy for Micro and Small Enterprises 2012 exempts micro and small enterprises from earnest money and the tender document cost. It does not exempt anyone from performance security.

Four levers, in the order they usually pay.

Shorten the live period. This is the biggest one and the most neglected. A guarantee whose validity has expired but which has not been formally released still holds your margin, because the bank lifts the lien on release, not on expiry. Chasing release the week the defect liability period ends is worth more than any rate negotiation. The procedure is set out in performance bank guarantee: cost, margin money and release.

Negotiate the margin before the commission rate. On most sanctions the margin is the larger number of the two, and it decides how many guarantees you can carry at once.

Check what the contract will accept instead. A fixed deposit receipt or an insurance surety bond may be permitted, and the ranking changes once locked capital is counted rather than fees alone. The comparison is in bank guarantee, FDR or insurance surety bond.

Price it, or decline. Put the total into the build up before you quote, per how to price a government tender, and into your walk away number before an auction opens, per the reverse auction floor price calculator. Across several live bids, committed capital is what caps how much you can bid for at all. Avsar tracks EMD and performance guarantees per bid so that total stays visible, and EMD and working capital planning sets out the calculation.