A surety bond is a three-party agreement in which a bonding company (the surety) guarantees to a party requiring the bond (the obligee) that another party (the principal) will fulfill a specific obligation. If the principal fails to perform, the obligee can file a claim and recover losses up to the bond’s face value, and the surety then collects that money back from the principal. Surety bonds appear wherever a government agency, project owner, or court needs assurance that a contractor, licensed business, or fiduciary will do what they promised.
The Three Parties and Why the Principal Still Pays
Every surety bond ties together three parties. The principal is the party that buys the bond and promises to perform, usually a contractor, licensed business, or court-appointed fiduciary. The obligee is the party that requires the bond and receives its protection, typically a government licensing agency, project owner, or court. The surety is the bonding company that issues the bond and backs the principal’s promise with its own financial strength.
When the principal defaults, the obligee files a claim against the bond and the surety pays out up to the bond’s limit. This is where a surety bond parts ways with an insurance policy. Before issuing a bond, the surety requires the principal to sign a general indemnity agreement. That agreement legally obligates the principal to reimburse the surety for every dollar of claim payments, plus legal fees, investigation costs, and related expenses. Spouses, business partners, and affiliated companies are often required to sign the same agreement, making them personally liable as well.
Because the surety expects to be repaid in full, a surety bond functions more like a line of credit than an insurance policy. The premium the principal pays is a fee for the surety lending its credit, not a reserve against losses. Both the principal and the surety can be pursued for the full amount of a valid claim, and the obligee can collect from either or both until the debt is satisfied.
What the Bond Document Contains
Bond forms vary by type and jurisdiction, but a few elements appear on nearly every one.
Penal Sum
The penal sum is the dollar amount printed on the face of the bond and the maximum the surety will pay on any claim. For a performance bond on a construction project, it’s typically 100 percent of the contract price. For a license or permit bond, the required amount is set by the government agency and commonly runs from a few thousand dollars to well over $100,000 depending on the industry and state.
The Obligation
The bond spells out the principal’s specific duty: completing a construction project according to contract terms, paying subcontractors and suppliers, complying with licensing regulations, or faithfully managing someone else’s assets. These conditions define what counts as a default. If the principal satisfies the obligation, the bond is void and no claims can be made against it.
Effective Dates and Term
Every bond states when coverage begins and ends. Some bonds run for a fixed term, often one or two years, and must be renewed. Others are written as continuous bonds that renew automatically each year until one of the three parties cancels. Construction performance bonds usually stay in effect for the life of the project rather than a calendar term.
Governing Law
The bond identifies the statute, regulation, or contract provision that requires it. A contractor bond on a federal project references the applicable federal acquisition regulation. A license bond for an auto dealer references the state statute mandating the bond. That reference ties the bond’s terms to the legal framework the obligee will use to enforce a claim.
Two Families: Contract Bonds and Commercial Bonds
Surety bonds split into two broad groups based on what kind of obligation they guarantee.
Contract Bonds
Contract bonds guarantee that a contractor will honor the terms of a construction contract. Three types make up almost all contract bond activity:
- Bid bonds are filed with a contractor’s bid on a public project. They guarantee the contractor will enter the contract and provide the required performance and payment bonds if awarded the job. On federal projects, the bid guarantee must be at least 20 percent of the bid price.
- Performance bonds guarantee the contractor will complete the work according to the contract’s plans, specifications, and timeline. If the contractor defaults, the surety can arrange a replacement contractor, take over the project itself, or pay the obligee’s completion costs up to the penal sum.
- Payment bonds guarantee the contractor will pay its subcontractors, suppliers, and laborers. Without a payment bond, unpaid suppliers on a public project would have no lien rights against government property and could be left with no recourse.
Federal law requires both performance and payment bonds on any federal construction contract exceeding $150,000, with each bond’s penal sum set at 100 percent of the contract price.1Acquisition.GOV. 28.102-1 General2Acquisition.GOV. 52.228-15 Performance and Payment Bonds-Construction The underlying statute, 40 U.S.C. ยง 3131, sets a statutory floor of $100,000 for the bond requirement.3Office of the Law Revision Counsel. 40 USC 3131 – Bonds of Contractors of Public Buildings or Works Every state has its own version of this law, often called a Little Miller Act, that imposes similar bonding requirements on state and local public construction projects, though thresholds and claim procedures vary.
Commercial Bonds
Commercial bonds guarantee compliance with laws, regulations, or court orders rather than construction contracts. Common types include:
- License and permit bonds, required by government agencies before they issue a business license. Auto dealers, freight brokers, mortgage brokers, and contractors in many states have to post these. Required amounts vary but commonly fall between $5,000 and $50,000.
- Court bonds, required by courts in litigation or estate proceedings. These include appeal bonds, which guarantee payment of a judgment during appeal, and fiduciary bonds, which guarantee that a trustee, guardian, or estate executor will manage assets honestly.
- Public official bonds, required for certain elected or appointed officials as a guarantee they will faithfully perform their duties.
What a Surety Bond Costs and How Underwriting Works
Because the surety expects to be repaid for any claim, underwriting looks more like a credit decision than an insurance risk assessment. The core question is whether the principal can actually perform the obligation and, if something goes wrong, afford to make the surety whole.
For small commercial bonds under roughly $50,000, underwriting may be as simple as pulling a credit report. For larger contract bonds, underwriters dig much deeper. They review current financial statements with a focus on working capital, net worth, and debt levels; the principal’s track record on similar projects; the qualifications of key personnel; and the current backlog relative to capacity. They make their own adjustments to reported financials, discounting old receivables, stripping out intangibles like goodwill, and stress-testing the work-in-progress schedule.
The premium is calculated as a percentage of the penal sum. For contract bonds where the principal has strong financials and a solid track record, premiums typically run between 1 and 3 percent of the contract price. Commercial license bonds for principals in good credit standing are often at the lower end of that range. Principals with poor credit or limited experience pay significantly more, sometimes 5 to 10 percent or higher. The premium isn’t a deposit and isn’t refundable if no claim is filed.
If a principal doesn’t meet the surety’s standard underwriting criteria, the surety may require collateral before issuing the bond. Acceptable collateral is usually limited to cash or an irrevocable letter of credit from a bank. Physical assets like real estate or equipment are generally not accepted. Court bonds and appeal bonds are among the types that most frequently require collateral, because the risk of a claim is higher by nature.
What Happens When Someone Files a Claim
When a principal defaults, the obligee triggers the claims process by notifying the surety. For performance bonds, most bond forms require the obligee to formally terminate the principal’s contract before the surety’s obligations kick in. Some forms also require a meeting among all three parties before any declaration of default.
After receiving notice, the surety investigates. It contacts the principal, reviews the underlying contract, inspects the project or situation, and decides whether the default is legitimate. The investigation can take weeks, longer on complex projects.
If the surety confirms a valid default on a performance bond, it generally has several resolution paths. It can tender a replacement contractor, take over completion directly using its own construction professionals, let the obligee arrange completion and reimburse those costs up to the penal sum, negotiate a cash settlement with the obligee, or deny the claim if it concludes the default wasn’t legitimate or the bond’s conditions weren’t met.
For payment bond claims, subcontractors or suppliers who haven’t been paid submit their claim directly to the surety. The surety investigates the amounts owed and, if the claim is valid, pays the claimant.
Whatever route the surety takes, the principal remains ultimately responsible. The indemnity agreement requires the principal to reimburse the surety for every dollar paid on claims, plus investigation and legal costs.
Renewal, Cancellation, and Lapse
Not every surety bond behaves the same way at expiration, and the difference matters because a lapse can cost the principal a license or a contract.
A term bond has a fixed expiration date, typically one or two years from issuance. Before it expires, the principal renews it, usually by paying the next year’s premium. Many sureties issue a continuation certificate rather than a brand-new bond, keeping the original bond number and terms intact. If the principal doesn’t renew before expiration, coverage lapses.
A continuous bond has no set expiration date. It renews automatically each year as long as the principal pays the renewal premium and neither party cancels. Customs bonds used by importers are a common example. Continuous bonds stay in force indefinitely until one of the three parties takes affirmative steps to end them.
When a surety cancels a bond, it must give advance written notice to both the principal and the obligee. The required notice period varies, but 30 to 90 days is typical. For certain federal bonds, the surety must give at least 60 days’ notice after the obligee receives the cancellation notice before the termination takes effect.4eCFR. 27 CFR 17.112 – Notice by Surety of Termination of Bond During the notice period, the principal has to either resolve whatever triggered the cancellation or secure a replacement bond from another surety.
If a bond is canceled, reinstatement is possible but not guaranteed. The surety reviews the circumstances and decides. If it approves, it issues formal documentation to the obligee confirming the bond remained in effect. If it refuses, the principal has to purchase an entirely new bond from a different surety, often at higher rates after fresh underwriting. Letting a required bond lapse, even briefly, can mean license suspension, disqualification from bidding on public projects, or breach of a contractual bonding requirement.