Surety Bonds 101: What Subcontractors Need to Know Before Bidding Public Work
According to Construction Today, surety bonds are a foundational requirement for contractors pursuing public works and large-scale private construction, functioning as a three-party financial guarantee that protects project owners while holding contractors accountable for performance, payment, and bid integrity.
How Surety Bonds Are Structured
Unlike traditional insurance, a surety bond involves three parties: the surety (the bonding or insurance company backing the obligation), the principal (the contractor purchasing the bond), and the obligee (the project owner receiving the protection). The critical distinction, according to Construction Today, is that if a claim is paid out, the contractor remains liable to reimburse the surety for any losses. This is not a safety net for contractors, it’s a financial guarantee held against them.
Three bond types govern most construction projects. Bid bonds, typically set at 5% to 20% of the bid price, confirm a bidder will follow through if awarded the contract. Performance bonds protect the owner if a contractor defaults, allowing the surety to step in or pay damages up to the bond amount. Payment bonds guarantee that subcontractors, suppliers, and workers get paid, protecting owners from mechanics’ liens.
On federal projects, the Miller Act requires both performance and payment bonds for any contract exceeding $150,000. State and local governments generally mirror this with their own “Little Miller Acts,” though thresholds vary by jurisdiction.
What It Means for Subcontractors
- If you’re chasing public works contracts, federal work over $150,000 triggers mandatory bonding requirements. Know your state’s threshold before you bid.
- Payment bonds on a project are your protection too. If a general contractor has a payment bond in place, subcontractors and suppliers have a claim path if they aren’t paid.
- Getting bonded requires underwriting. Sureties assess financial stability, so maintaining clean books and a solid track record directly affects your ability to qualify, and at what cost.
- Even when bonds aren’t legally required, carrying them signals financial credibility and can give smaller field service companies a competitive edge over unbonded competitors.
