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Estimating & Bidding

Bid Security

In Plain English

A deposit or bond submitted with a bid that the owner can keep if the winning contractor backs out.

Definition

Bid security is a financial instrument required with a bid submission to protect the owner if the winning bidder fails to execute the contract. Common forms include bid bonds, certified checks, and letters of credit. The amount is typically 5–10% of the bid price and is returned to unsuccessful bidders after award.

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