Insurance and bonds

What is a bonding company in construction?

A bonding company is a surety: an insurance company that issues construction bonds guaranteeing to the owner that a contractor will perform the contract and pay its subs and suppliers.

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Plan reviews connect field conditions, drawings, and the next decisions on a job. AI-generated illustration.

A bonding company, more precisely a surety, is a company that issues construction bonds. A bond is a three-party promise. The contractor (the principal) promises to perform. The owner (the obligee) is protected. The surety guarantees that if the contractor fails to perform or pay, the surety will step in, up to the bond amount. Then the surety looks to the contractor, and usually its owners personally, to pay it back.

That last part is what makes a bond different from insurance. Insurance spreads losses. A surety expects no losses and underwrites as if it were lending money, because the contractor signs an indemnity agreement promising to repay any loss.

What bonding companies issue

  • Bid bond: guarantees the bidder will sign the contract and provide the other bonds if awarded.
  • Performance bond: guarantees the work will be completed per the contract.
  • Payment bond: guarantees subcontractors and suppliers will be paid.
  • Maintenance bond: covers defects during a warranty period.
  • License and permit bonds: required by some states and cities to get or keep a license.

Federal work makes bonds mandatory above a threshold. FAR 28.102-1 says the Miller Act requires performance and payment bonds for any construction contract exceeding $150,000, and for contracts over $35,000 up to $150,000 the contracting officer must select two or more alternative payment protections, such as a payment bond, an irrevocable letter of credit, or a tripartite escrow agreement. States have their own versions (often called Little Miller Acts) for state and local public work.

Which bonding companies are acceptable

For federal bonds, the surety must be on the Treasury Department's Circular 570 list of certified companies. Treasury publishes the circular annually, posts interim changes, and lists an underwriting limitation for each company that applies per bond. If a bond's penal sum exceeds a company's limitation, the excess must be protected by co-insurance, reinsurance, or other methods allowed by Treasury rules. Many state and local owners also check Circular 570 or require a surety licensed in their state.

Small contractors that cannot yet qualify with a standard surety can look at the U.S. Small Business Administration Surety Bond Guarantee program. U.S. Small Business Administration guarantees bid, performance, and payment bonds issued by participating sureties for contracts up to $9 million for non-federal work and up to $14 million for federal work, and charges a fee of 0.6 percent of the contract price on performance and payment bond guarantees.

How a bonding company underwrites a contractor

Say a concrete contractor doing $6 million a year wants to bid a $2.5 million public parking structure. The surety, usually through a bond agent or broker, will want:

  1. Year-end financial statements, often CPA reviewed or audited depending on program size, with a WIP report.
  2. Interim financials and a current work-in-progress schedule.
  3. A bank line of credit letter and personal financial statements of the owners.
  4. Resumes, a list of completed projects, and references.
  5. Details on the job: owner, contract terms, schedule, and margins.

From that, the surety sets a single job limit and an aggregate limit, together called bond capacity. Working capital, net worth, profit fade on past jobs, and backlog all move those limits.

Common mistakes

  • Waiting until a big bid is due to start a surety relationship.
  • WIP reports with heavy underbilling or margin fade, which make underwriters nervous.
  • Not understanding personal indemnity. Owners and often spouses sign it.
  • Letting a payment bond claim sit. Sureties expect contractors to resolve claims fast.
  • Using a surety without checking that it is acceptable to the owner, such as being listed on Circular 570 for federal work.

Related terms

See completion bond, bond capacity, and subcontractor default insurance. Read how bonding capacity is calculated for contractors and how the Miller Act protects subcontractors. Smart Business Automator produces job cost and WIP views from live project data, which is what sureties ask for each quarter. See job costing and WIP automation.

Frequently asked questions

Is a bonding company the same as an insurance company?

Sureties are usually insurance companies or their subsidiaries, but a bond is not insurance for the contractor. The contractor signs an indemnity agreement and must repay the surety for any loss.

When are bonds required on federal construction?

FAR 28.102-1 says the Miller Act requires performance and payment bonds on construction contracts exceeding $150,000, with alternative payment protections required for contracts over $35,000 up to $150,000. Check the current FAR for updates.

How do I know a surety is acceptable for a federal bond?

Check the Treasury Department's Circular 570 list of certified companies and the company's underwriting limitation.

What if I cannot get bonded?

Small contractors may qualify through the U.S. Small Business Administration Surety Bond Guarantee program, which guarantees bonds from participating sureties for contracts up to $9 million non-federal and $14 million federal.

What does a surety look at in a contractor's financials?

Working capital, net worth, profitability, WIP and margin fade, backlog, bank credit, and the owners' personal financial strength.

Sources

  1. FAR 28.102-1 via Acquisition.gov: General (Miller Act bonds)
  2. Bureau of the Fiscal Service: Circular 570
  3. U.S. Small Business Administration: Surety bonds
Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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