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Insurance & Bondingaka: contract bondaka: construction bond

Surety Bond

In Plain English

A legally binding guarantee involving a third party (the surety) that a contractor will meet their obligations.

Definition

A surety bond is a three-party agreement among a principal (contractor), an obligee (owner or government), and a surety (bonding company) that guarantees the principal will fulfill a specific obligation. Unlike insurance, a surety bond is not intended to absorb losses but to guarantee performance; the surety expects to be repaid by the principal for any claims paid. Surety bonds used in construction include bid bonds, performance bonds, payment bonds, and license bonds.

Why It Matters in Bidding

Surety bonds determine which contractors can even compete for many public and large private projects, because owners require bid, performance, and payment bonds to transfer the risk of contractor default. A contractor's bonding capacity effectively caps the size and number of jobs it can pursue, so it is a strategic constraint on bidding, not just a paperwork item. The premium is carried in the bid, and inability to secure a bond can render an otherwise low bidder non-responsive.

Example

A county requires a surety bond package — bid bond, performance bond, and payment bond — for all public construction projects over $500,000, so a contractor without sufficient bonding capacity cannot bid that work.

Related Terms

Bid BondPerformance BondPayment Bond

Frequently Asked Questions

Insurance is a two-party arrangement that absorbs the insured's losses, with premiums priced to expect claims. A surety bond is a three-party guarantee where the surety expects no losses and pursues repayment from the contractor for any claim it pays. The bond protects the owner, while the contractor remains ultimately responsible for the obligation.
The common construction bonds are bid bonds, which guarantee a winning bidder will sign the contract; performance bonds, which guarantee the work is completed per contract; and payment bonds, which guarantee subcontractors and suppliers are paid. License and maintenance bonds also exist. Public projects often require the bid, performance, and payment trio together.
Bonding capacity is the total dollar value of bonded work a surety is willing to back for a contractor, based on its financials, experience, and management. It caps how much work a contractor can pursue at once. Pursuing a project beyond available capacity may mean a contractor cannot obtain the required bonds and must pass on the bid.

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