A Bid Bond is a debt secured by a bidder for a construction job or similar type of bid-based selection process for the purpose of providing a guarantee to the project owner that the bidder will take on the job if selected. The existence of a bid bond provides the project owner with assurance that the bidder has the financial means to accept the job for the price quoted in the bid.
The Bid Bond is intended to keep frivolous bidders out of the bidding process by assuring that the successful bidder will enter into the contract and provide the required performance and payment bonds. If the lowest bidder fails to honor these commitments, the owner is protected, up to the amount of the bid bond, usually for the difference between the low bid and the next higher responsive bid.