Bid security and bank guarantees explained

Most serious tenders ask for bid security — money or a guarantee you lodge with your bid to show you’re genuine and will stand by your offer. Get it wrong and a strong bid is rejected on a technicality. Here’s what you need to know.

What is bid security?

Also called Earnest Money Deposit (EMD) or a bid bond, it protects the buyer if a bidder withdraws during the validity period or refuses to sign the contract after winning. If you behave properly, it’s returned; if you renege, it’s forfeited.

The common forms

• Bank guarantee — the most common for larger tenders: your bank promises to pay the buyer on demand up to the guaranteed amount.
• Bid bond — a similar instrument from a bank or surety company.
• Cash / demand draft / online payment — for smaller tenders.
• Exemptions — MSMEs/start-ups are often exempt on some portals; check the tender.

How much, and for how long?

Typically 1–3% of the estimated tender value, and it must stay valid past the bid validity period (often bid validity + ~30–45 days). A guarantee that expires too early is a frequent cause of rejection — read the exact figures in the tender and match them.

When is it forfeited?

• You withdraw or modify your bid during its validity.
• You win but fail to sign the contract or provide the performance guarantee.
• You’re found to have submitted false information.

Don’t confuse it with these

• Performance guarantee / security — lodged after you win, usually 5–10% of the contract value, to secure delivery.
• Advance payment guarantee — if the buyer pays you an advance, this secures it until you’ve earned it.

Practical tips: arrange the guarantee early (banks need time), match the amount, format and validity to the tender exactly, and follow up to get it released promptly once the process ends — that’s working capital sitting idle.