The short definition
A performance bond is a surety guarantee, issued by a bank or bonding company, that you will deliver the contract to its terms. It is often set at around 10 percent of the contract value and stays in place for the delivery period. If you default, the buyer can claim against it to cover the cost of completing the work or bringing in another supplier. Unlike a bid bond, which covers the risk that you walk away before signing, a performance bond covers the risk that you sign and then fail to deliver.