A contractor's surety bond is an agreement between a contractor, client, and surety company that provides financial assurance the contractor will complete the job satisfactorily. The bond protects the client from losses resulting from the contractor's failure to pay suppliers, subcontractors, or complete the work. The surety company assesses the contractor's history, assets, experience, and financial strength to determine the bond amount. Having a bond helps contractors attract clients and allows them to bid on larger projects by establishing credibility.