Article Overview: Construction bonds protect project owners by guaranteeing contractors meet their financial and contractual obligations. Before securing one, contractors should understand bond types, qualification requirements, costs, the role of surety underwriters, and the added complexity of government or infrastructure contracts, which often carry stricter bonding thresholds.
Government agencies and municipalities don’t hand out infrastructure contracts to just anyone. Before a contractor can even bid on a public project, they typically need to prove financial reliability through a construction bond. This requirement protects taxpayers and project owners from the risk of unfinished work, unpaid subcontractors, or outright contractor default.
For contractors new to public works, the bonding process can feel like a maze of paperwork, underwriting reviews, and unfamiliar terminology. Understanding how construction bonds function – and what underwriters look for – can mean the difference between winning a lucrative government contract and losing it to a better-prepared competitor.
Let’s review five essential things contractors need to know before securing a construction bond, with particular attention to the heightened requirements of infrastructure and municipal work.
What is a Construction Bond, and Why Do Government Contracts Require One?
A construction bond is a three-party agreement between a contractor (the principal), a project owner (the obligee), and a surety company (the guarantor). The surety financially guarantees that the contractor will fulfill the terms of the construction contract. If the contractor fails to perform, the surety steps in to cover losses, up to the bond’s penal sum.
Government contracts almost always require bonding because public projects are funded by taxpayer dollars. The Miller Act, a federal law dating back to 1935, mandates that contractors on federal construction projects over $150,000 provide both a performance bond and a payment bond. Many states have adopted similar “Little Miller Act” statutes for state and municipal projects, often with their own thresholds and requirements.
Unlike insurance, which protects the policyholder, a construction bond protects the project owner and the public. If a contractor defaults, the surety doesn’t simply pay out – it typically works to ensure the project gets completed, either by financing the original contractor’s completion or hiring a replacement.
What Are the Different Types of Construction Bonds?
Contractors bidding on infrastructure and government work generally need to understand three primary bond types:
Bid bonds guarantee that a contractor will honor the bid they submit and enter into the contract if awarded the project. If a contractor backs out after winning a bid, the bid bond compensates the project owner for the difference between the winning bid and the next-lowest bid.
Performance bonds guarantee that the contractor will complete the project according to the contract’s terms, specifications, and timeline. These bonds typically take effect once the contract is signed and remain active until the project reaches substantial completion.
Payment bonds guarantee that the contractor will pay subcontractors, laborers, and material suppliers. This protects smaller businesses down the supply chain from nonpayment, which is especially important on public projects where liens cannot typically be placed against government-owned property.
Choose a bid bond if you’re still in the bidding phase of a project. Choose a performance and payment bond combination once you’ve won the contract and need to formalize your commitment to the project owner.
How Do Surety Companies Determine Bonding Eligibility?
Surety underwriters evaluate contractors against what’s commonly known as the “three Cs”: character, capacity, and capital.
Character refers to the contractor’s reputation, business history, and track record of completing projects on time and within budget. Underwriters often review references, past project performance, and any history of claims or litigation.
Capacity assesses whether the contractor has the equipment, workforce, experience, and management systems necessary to complete the specific project in question. A contractor bidding on a $20 million bridge project needs to demonstrate prior experience with projects of similar scale and complexity.
Capital examines the contractor’s financial strength, including working capital, net worth, credit history, and overall financial statements. Sureties typically request several years of financial statements, often prepared by a CPA, along with current work-in-progress schedules.
Contractors pursuing government or infrastructure work should expect a more rigorous underwriting process than smaller private projects. Larger bond amounts, often required for infrastructure contracts, mean sureties conduct deeper financial scrutiny before approval.
What Does a Construction Bond Cost?
Bond premiums are typically calculated as a percentage of the contract value, commonly ranging from 1% to 3% for contractors with strong financials and credit. Contractors with weaker credit profiles or limited experience may pay higher rates, sometimes 3% or more, particularly for their first few bonded projects.
Several factors influence the premium rate: the contractor’s credit score, financial statements, industry experience, and the size and complexity of the project itself. Infrastructure projects, which often involve larger bond amounts and longer project timelines, may also require contractors to demonstrate additional financial reserves to secure favorable rates.
It’s worth noting that bond costs are generally built into the overall project bid, so contractors should factor premium costs into their pricing strategy before submitting a proposal.
What Makes Bonding for Government and Infrastructure Projects Different?
Government and municipal contracts come with bonding requirements that exceed what’s typical for private commercial work. Understanding these differences helps contractors prepare more competitive, compliant bids.
Higher bonding capacity requirements. Infrastructure projects, such as roads, bridges, water treatment facilities, and public buildings, often involve contract values in the tens or hundreds of millions of dollars. Contractors need sufficient bonding capacity, the maximum amount of bonded work a surety will support, to qualify.
Stricter compliance standards. Public projects often involve prevailing wage laws, Davis-Bacon Act requirements, and detailed reporting obligations. Underwriters factor these compliance burdens into their risk assessment.
Longer underwriting timelines. Because of the scale and complexity involved, bonding for infrastructure work typically takes longer to underwrite than smaller private jobs. Contractors should begin the bonding process well before bid deadlines to avoid losing opportunities due to delays.
Statutory bond requirements. As noted earlier, federal projects over $150,000 fall under Miller Act requirements, and most states have comparable statutes for public work below that threshold. Contractors should confirm the specific bonding thresholds and requirements for each jurisdiction before bidding.
Contractors new to public infrastructure work should build a relationship with a surety agent experienced in government contracting well in advance of their first bid. This relationship often proves more valuable than shopping for the lowest premium, since an experienced surety can guide contractors through compliance requirements and help them scale bonding capacity over time.
Building a Bonding Strategy That Supports Long-Term Growth
Securing construction bonds isn’t simply a box to check before submitting a bid. It’s a financial relationship that, managed well, can expand a contractor’s capacity to take on larger and more complex projects over time.
Talk with Brandon Patterson on our team at brandon@ownbyinsurance.com to start building your bond strategy.