Surety bonds for contractors
Quick answer
A surety bond guarantees you'll complete a project according to the contract. Most public projects and many large private ones require bonding to bid. The three core types are bid, performance, and payment bonds.
Premiums typically run 1–3% of contract value, and your bonding capacity — the most work a surety will back — is driven by your financial strength.
Bonding is the gatekeeper to bigger work. Without it, the most profitable public and commercial jobs are simply off-limits.
It's also closely tied to your financing, because surety underwriters and lenders look at the same thing — your financial strength. Build one and you build the other.
Key takeaways
- → A surety bond guarantees project completion; most public and large private jobs require one to bid.
- → The three types are bid, performance, and payment bonds — big jobs need all three.
- → Premiums run roughly 1–3% of contract value, lower for strong contractors.
- → Bonding capacity rises with your working capital, credit, and project history.
What a surety bond is
A surety bond is a three-party agreement between you, the project owner, and a surety company. It guarantees you'll perform the contract as promised.
If you fail to deliver, the surety makes the owner whole and then comes after you to recover the cost. It's a guarantee of your work, not insurance for you.
The three types of construction bonds
A bid bond guarantees you'll stand behind your bid and take the contract at the price you quoted.
A performance bond guarantees you'll complete the project to the contract's terms.
A payment bond guarantees you'll pay your subcontractors and suppliers. On large public projects, owners typically require all three.
What surety bonds cost
The premium on performance and payment bonds usually runs 1 to 3% of the contract value, and strong contractors pay at the low end. Bid bonds are often free or a small flat fee.
Your financial strength sets the rate. Clean books and solid working capital lower your cost and raise the ceiling on what you can bid.
How bonding capacity works
Bonding capacity is the maximum value of work a surety will back — both per job and across all your active jobs.
Underwriters set it by reviewing your financial statements, working capital, credit, and history of completed projects. This is why working capital matters so much — it directly lifts your capacity.
Bonding and financing go together
Here's the connection most contractors miss. The balance sheet a surety reviews is the same one a lender reviews.
Keeping financing in good standing — a healthy line of credit, equipment loans paid on time — strengthens the profile that supports bigger bonds. A construction business loan that shores up working capital can raise your bonding capacity as a side effect.
Getting bonded as a small contractor
Newer and smaller contractors aren't shut out. The SBA's Surety Bond Guarantee program backs a portion of the bond for the surety, helping contractors qualify for bonds they couldn't get on their own.
Our SBA and surety overview covers how that program fits with SBA financing.
Lenders that strengthen your financial profile
Lenders that help build bondable financials
Best Overall — Same-Day Funding Across Six Loan Types Ad
Best Line of Credit for Cash Flow
Best Invoice Factoring for Contractors
To strengthen the working capital underwriters look for, eBoost Partners offers construction business financing across several products on one application.
Related guides
SBA & surety bonds overview
How SBA loans and bonding fit together.
SBA eligibility
How contractors qualify for SBA financing.
Working capital & cash flow
Working capital lifts your bonding capacity.
Construction business loans
Strengthen the balance sheet underwriters review.
Commercial construction loans
Financing for the projects you bond.
Construction industry statistics
Context on the construction market.