A performance bond is a three-party guarantee that a contractor will finish a construction project according to its contract, and if the contractor defaults, a surety company steps in to either arrange completion or pay the project owner up to the bond’s face amount. Federal law requires one on any government construction contract over $150,000, most states impose similar rules on public works, and large private developers routinely demand them too.1Acquisition.GOV. FAR 28.102-1 General The bond exists so the owner isn’t left holding the bag when a contractor walks off, goes bankrupt, or delivers work that doesn’t meet the contract.
The Three Parties
Every performance bond involves the same three roles, and the mechanics only make sense once you know who they are.
The principal is the contractor whose work is being guaranteed. The principal pays the bond premium, goes through the surety’s underwriting, and signs a personal indemnity agreement backing the bond.
The obligee is the project owner. The obligee is the only party who can make a claim if the contractor defaults, and the obligee sets the bond requirement in the contract documents, including the required amount and acceptable surety ratings.
The surety is the company that issues the bond and guarantees the contractor’s performance. If the principal defaults, the surety must either arrange for the work to be completed or pay the obligee, but only up to the bond’s penal sum. Sureties are typically large insurance companies or specialized bonding firms licensed by state insurance departments.
A surety is not an insurer in the ordinary sense. Insurance expects losses; sureties do not. A surety underwrites the contractor expecting no claim will ever be paid, and when a claim does happen, the surety has the legal right to recover every dollar it spends from the contractor through the indemnity agreement. That is what separates bonding from insurance, and it is why the vetting is so rigorous.
Where Performance Bonds Are Required
The broadest mandate is federal. Under what’s still commonly called the Miller Act, any federal construction contract exceeding $150,000 requires the contractor to furnish both a performance bond and a payment bond before work begins.1Acquisition.GOV. FAR 28.102-1 General The performance bond protects the government’s interest in getting the project finished. The payment bond protects subcontractors and suppliers. On federal contracts, the penal sum of the performance bond must equal 100% of the original contract price.2Acquisition.GOV. 52.228-15 Performance and Payment Bonds-Construction
Every state has adopted some version of a “Little Miller Act” imposing bond requirements on state and local public works. The thresholds vary widely. Some states require bonds on every public project regardless of value; others don’t trigger the requirement until the contract exceeds $100,000 or more. A few set the threshold as high as $500,000 for certain state-level work.
Private owners are not legally required to demand performance bonds, but large commercial developers routinely do. When a private developer puts $50 million into a hospital or office tower, the bond premium is a small price for the assurance that the project will actually get built. Private contracts sometimes set the penal sum below 100% of the contract value to reduce premium costs, though 100% remains the most common figure.
What Bonds Cost and How Contractors Qualify
Getting bonded is closer to applying for a substantial line of credit than buying an insurance policy. Premiums generally run between 0.5% and 3% of the contract price, with financially strong contractors and larger projects landing at the low end.3Federal Highway Administration. Chapter 4 – Benefit-Cost Analysis of Performance Bonds On a $10 million project, that means anywhere from $50,000 to $300,000 in premium. The contractor pays it, though the cost ultimately shows up in the bid the owner accepts.
Sureties evaluate contractors on what the industry calls the three Cs: character, capacity, and capital.
Character is the track record. The surety looks at how many projects the contractor has completed on time, whether there’s a history of litigation or claims, and the reputation the contractor has built with previous obligees and subcontractors. A pattern of disputes or abandoned projects is a red flag no balance sheet can overcome.
Capacity is whether the contractor can actually handle this project on top of everything already in progress. The surety weighs experience with similar project types, available equipment, staffing depth, and current workload. Taking on a $20 million highway project when your largest job to date was a $5 million parking lot is a non-starter, regardless of financial strength.
Capital is where sureties get granular. Contractors have to provide audited or reviewed financial statements, typically both interim and year-end. Sureties focus on working capital and net worth. A common benchmark is that working capital should be at least 5% to 10% of the cost remaining on all open projects, and net worth 10% to 20% of that same figure. The surety will strip out intangible assets like goodwill and discount receivables that are more than 90 days old.
The General Agreement of Indemnity
Before a surety issues any bonds, the contractor signs a General Agreement of Indemnity, or GAI. This is the document that keeps the surety from bearing the ultimate risk. The GAI obligates the contractor and any named indemnitors to reimburse the surety for every dollar it pays out on a claim, including legal fees and investigation costs. Sureties almost always require the company’s individual owners, and often their spouses, to sign the GAI personally. That puts the owners’ personal assets on the line, not just the company’s. The GAI also typically gives the surety the right to demand collateral on short notice and the exclusive authority to decide whether to settle or fight a claim.
The personal exposure surprises many contractors. A performance bond is effectively guaranteed credit, not a transfer of risk. If the surety pays a claim, it will pursue the contractor and every personal indemnitor to recover its losses.
The SBA Surety Bond Guarantee Program
Small and emerging contractors who can’t qualify for bonding on their own may be able to use the Small Business Administration’s Surety Bond Guarantee Program. The SBA guarantees a portion of the surety’s risk, which makes sureties more willing to bond contractors who would otherwise be turned down. The program covers contracts up to $9 million for non-federal work and up to $14 million for federal contracts where the contracting officer certifies the guarantee is necessary.4U.S. Small Business Administration. Surety Bonds The business still has to meet SBA size standards and pass the surety’s own credit, capacity, and character review.
How a Claim Works
A bond sitting in a filing cabinet does nothing. The claim process is what activates it, and getting the steps wrong can void the owner’s rights entirely.
Declaring Default and Giving Notice
The obligee starts with written notice of default to both the contractor and the surety. That notice has to identify the specific contract breaches, describe how the contractor failed to cure them within whatever cure period the contract allows, and state the obligee’s intent to declare a formal default.5Acquisition.GOV. 49.402-3 Procedure for Default Vague complaints don’t cut it. The notice needs to point to the contract provisions the contractor violated and explain what the contractor failed to fix when given the chance.
Proper notice is not a technicality that can be cleaned up later. An owner who skips notice, fires the contractor, and hires a replacement on its own hands the surety a complete defense to the claim.
The Surety’s Investigation
Once the surety has the default notice, it investigates. It inspects the project, reviews the contract documents, assesses how much work remains, and determines whether the contractor was actually in default. The surety also looks at whether the obligee contributed to the failure. If the owner withheld payments, issued defective plans, or unreasonably interfered with the work, the surety may conclude the contractor wasn’t truly at fault.
The Surety’s Four Options
If the surety confirms the default is legitimate, standard bond forms like the widely used AIA A312 give it four paths forward:
- Finance the original contractor. The surety provides the capital or technical support needed to get the contractor back on track and finish the job, with the owner’s consent.
- Take over the work directly. The surety arranges completion through its own agents or by hiring a replacement contractor itself.
- Tender a new contractor to the owner. The surety solicits bids from qualified replacements, arranges a new contract for the owner to execute, and pays the difference between the remaining contract balance and what the new contractor charges, up to the bond’s penal sum.
- Pay the claim and walk away. The surety determines its total liability, pays the obligee, and closes the matter. It then pursues the contractor under the indemnity agreement to recover what it paid.
Which option the surety picks is generally its discretion under the bond, and it turns on the project’s circumstances and what’s cheapest to complete.
Defenses That Can Kill a Claim
Sureties don’t simply write checks when claims arrive. They have a menu of legal defenses, and the ones that succeed most often turn on the owner’s own conduct.
- Improper or missing notice. The obligee failed to follow the bond’s notice procedures before declaring default or hiring a replacement. This is probably the most common defense that actually works.
- Owner-caused default. The obligee contributed to the failure by withholding payments, providing defective plans or specifications, or causing unreasonable delays.
- Material contract changes. The obligee and contractor materially altered the underlying contract without the surety’s consent, which can discharge the surety’s obligations.
- Failure to mitigate. The obligee took over completion without giving the surety the opportunity to exercise its options, stripping the surety of its chance to minimize costs.
- Overpayment. The obligee paid the contractor more than the completed work justified, leaving insufficient contract funds to finish the job.
- No actual default. The obligee terminated the contractor for convenience rather than for cause. Without a default, the performance bond is never triggered.
An owner who overpays, changes scope without notifying the surety, or brings in a replacement crew before giving the surety a chance to respond is handing the surety its defense.
Performance Bonds vs. Payment Bonds
Performance bonds and payment bonds are almost always required together, but they protect completely different groups. A performance bond protects the project owner. If the contractor doesn’t finish the work or delivers it defectively, the owner makes the claim. Subcontractors and suppliers generally have no right to claim against a performance bond.
The payment bond protects subcontractors, material suppliers, and laborers. If the contractor fails to pay the people who supplied the labor and materials, those parties can claim against the payment bond. Under the Miller Act, a first-tier subcontractor or supplier who hasn’t been paid in full within 90 days of their last work can bring a civil action on the payment bond. A second-tier party must also give written notice to the prime contractor within 90 days. In both cases, the lawsuit must be filed within one year of the last labor performed or material supplied.6Office of the Law Revision Counsel. 40 USC 3133 – Rights of Persons Furnishing Labor or Material
On public projects, payment bonds serve a function that doesn’t exist in private work: because government property can’t be subjected to a mechanic’s lien, the payment bond is the only security subcontractors and suppliers have.
Alternatives to a Performance Bond
Bonds are the standard, but they aren’t the only way to guarantee completion.
- Irrevocable letter of credit. A bank commits to paying the owner a specified amount on demand if the contractor defaults. The owner gets faster access to funds because there’s no investigation or claims process, but the owner then has to manage completion itself. Annual fees typically run 1% to 2% of the guaranteed amount.
- Cash collateral or retainage. The contractor deposits cash, certificates of deposit, or certified checks as security. That gives the owner immediate liquidity but ties up the contractor’s working capital.
- Subcontractor default insurance. Used by large general contractors instead of requiring performance bonds from each subcontractor. The general buys an insurance policy covering subcontractor defaults, retains control of the completion process, and handles its own subcontractor vetting. Premiums can be 50% to 70% lower than bond premiums, but the policies carry significant deductibles and co-pays that the contractor absorbs.
The key difference between a performance bond and these alternatives is who manages the default. With a bond, the surety takes over completion. With a letter of credit or cash collateral, the owner gets money but has to sort out the mess. For most public projects the choice is moot, because the Miller Act and its state equivalents specifically require bonds.