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Key concept

Performance Security & Bank Guarantee

Concept explainer·~6 min read·Updated June 2026
A bank guarantee certificate protecting a government contract
After you win, performance security guarantees you'll complete the work — usually a bank guarantee.
In short Performance security is a guarantee the winning bidder furnishes after award to ensure they complete the contract. It's commonly 3% of the contract value (historically 5–10%).

Where EMD proves you're a serious bidder, performance security proves you'll deliver. It's the guarantee the department holds for the life of the contract.

How much is it?

The exact figure is in the contract, but typically:

ItemTypical value
Performance security~3% of contract value (some tenders 5–10%)
Performance Bank Guarantee (PBG)Same amount, in BG form
Retention moneyDeducted from each running bill (where applicable)

What form does it take?

When is it released — or forfeited?

↩️
Released
After completion + the defect-liability period
🛡️
Held
For the full contract + warranty period
Forfeited
If you abandon or breach the contract

EMD vs performance security vs retention

WhenPurpose
EMDWith the bidGood-faith bid security (~2%)
Performance securityAfter winning, before signingGuarantees completion (~3%)
Retention moneyDeducted from billsCovers defects during execution

What is a Bank Guarantee (BG)?

A BG is a written promise by your bank to pay the department a fixed amount if you fail to meet your obligations. The bank charges a fee and usually holds margin/collateral. Keep your BG valid for the full required period plus a claim buffer — an expired BG is treated as no security.

Plan your BG earlyArranging a bank guarantee takes time and ties up margin money. Line it up as soon as you receive the Letter of Award so you don't miss the signing deadline.

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Frequently asked questions

What is performance security in a tender?
A guarantee the winning bidder furnishes after award (commonly ~3% of contract value) to ensure they complete the contract. It is released after completion and the defect-liability period, and forfeited on default.
How much is performance security?
Usually around 3% of the contract value, though some tenders ask 5–10%. The exact figure is stated in the contract/tender document.
What is the difference between EMD and performance security?
EMD is paid with the bid as good-faith bid security (~2%). Performance security is furnished after winning, before signing, to guarantee completion (~3%).
What is a Performance Bank Guarantee (PBG)?
Performance security furnished in the form of a bank guarantee — a scheduled bank guarantees the amount to the department for the contract period.
When is performance security released?
After the work is satisfactorily completed and the defect-liability/warranty period ends. It is forfeited if the contractor abandons or breaches the contract.

Related guides

Concept
What is EMD?
Concept
What is a surety bond?
Getting started
The government tender process