Surety Bond Glossary — Every Term Explained in Plain English
48 surety bond terms, explained the way one person would explain them to another. No legal jargon. If you need a bond quote or want to browse all bond types, start there. If you want to understand the language first, you are in the right place.
Core Concepts
- Surety Bond
- A three-party agreement where one company (the surety) guarantees that a business or person (the principal) will follow through on an obligation to someone else (the obligee). If the principal does not follow through, the surety pays the obligee and then comes after the principal for reimbursement. Learn more in our full explanation of surety bonds.
- Principal
- The person or business that buys the bond. The principal is the one making the promise — to finish a project, follow licensing rules, or meet some other obligation. If something goes wrong, the principal is on the hook.
- Obligee
- The party that requires the bond and is protected by it. Usually a government agency, project owner, or court. The obligee is the one who can file a claim if the principal does not hold up their end of the deal.
- Surety
- The insurance company that backs the bond. The surety is telling the obligee: "If this principal does not deliver, we will make it right." Sureties must appear on the Treasury List to write federal bonds.
- Penal Sum
- The maximum dollar amount the surety will pay on a claim. If you have a $50,000 bond, the penal sum is $50,000. It is the same thing as the bond amount — just the formal legal name for it.
- Bond Amount
- The total coverage of the bond — the most the surety will pay if a valid claim is filed. This is not what you pay out of pocket. Your cost is the premium, which is a small percentage of the bond amount.
- Indemnity Agreement (GAI)
- A contract you sign when you get bonded that says: "If the surety pays a claim, I will pay them back." GAI stands for General Agreement of Indemnity. On larger bonds, business owners and sometimes their spouses sign personally.
- Underwriting
- The process a surety uses to decide whether to issue you a bond and at what price. For small bonds, it might just be a credit check. For large performance bonds, expect financial statements and a deep look at your track record. Learn about the full process in our how to get a surety bond guide.
- Bond Form
- The actual document that spells out the bond's terms — who is covered, the bond amount, what triggers a claim, and how long the bond lasts. Some obligees require a specific form. Others accept standard surety company forms.
- Continuous Bond
- A bond that stays in effect until it is actively canceled, rather than expiring on a set date. Most license bonds work this way. You renew annually, and the bond continues unless you or the surety cancels it.
- Term Bond
- A bond that covers a specific time period — say one year, two years, or the length of a construction project. When the term ends, the bond expires. Contract bonds are usually term bonds tied to a project timeline.
Bond Types
- Contract Bond
- Any bond tied to a construction contract. The three main contract bonds are bid bonds, performance bonds, and payment bonds. If you are bidding on or building a project, these are the bonds you will deal with. See all contract bonds.
- Commercial Bond
- A catch-all term for bonds that are not tied to a specific construction contract. License bonds, permit bonds, court bonds, and fiduciary bonds all fall under the commercial bond umbrella. Browse commercial surety bonds.
- License Bond
- A bond required to get or keep a business license. It protects the public in case you break licensing rules. Auto dealers, contractors, mortgage brokers, and many other professionals need them. See all license bonds.
- Permit Bond
- A bond required to obtain a permit — usually from a city or county. It guarantees you will follow the rules attached to that permit, like building codes or encroachment standards. Very similar to a license bond, just tied to a permit instead. Learn more about permit bonds.
- Performance Bond
- Guarantees a contractor will complete the project according to the contract. If the contractor walks off or cannot finish, the surety steps in — either hiring a new contractor or paying the project owner. Required on all federal projects over $150,000 under the Miller Act. See our full performance bond guide.
- Payment Bond
- Guarantees a contractor will pay their subcontractors, suppliers, and laborers. On public projects, where mechanics' liens are not available, this is the main protection for the people doing the work. Usually issued alongside a performance bond. Learn more about payment bonds.
- Bid Bond
- Filed with a construction bid to guarantee the contractor will honor their bid price and sign the contract if selected. If you win the bid but refuse to do the work, the project owner can claim the difference between your bid and the next lowest bidder. See our bid bond guide.
- Supply Bond
- Guarantees a supplier will deliver materials, equipment, or supplies on time and as specified in their contract. Less common than other contract bonds, but sometimes required on large government projects.
- Maintenance Bond
- Covers defects in workmanship or materials after a construction project is finished — typically for one to two years. Think of it as a warranty backed by a surety. Sometimes called a warranty bond.
- Subdivision Bond
- Guarantees a developer will build public improvements — roads, sidewalks, sewer lines, drainage — in a new subdivision. The municipality requires it so taxpayers are not stuck paying if the developer does not finish the infrastructure.
- Court Bond
- Any bond ordered by a court or required to take action in a legal proceeding. Appeal bonds, attachment bonds, and injunction bonds are all court bonds. They protect the other party from financial harm if the court action turns out to be wrong. See all court bonds.
- Fiduciary Bond
- Required when someone is appointed to manage another person's money or property — like an estate executor, guardian, or trustee. The bond protects beneficiaries from mismanagement or theft. Also called a probate bond or estate bond. See all fiduciary bonds.
Claims & Legal
- Bond Claim
- A formal demand for payment under a surety bond. When the principal fails to meet their obligations, the obligee (or an injured third party, like an unpaid subcontractor) files a claim with the surety. The surety investigates, and if valid, pays up to the penal sum. Read our complete guide on surety bond claims.
- Default
- When the principal fails to perform their obligation — does not finish the project, does not follow licensing rules, or does not pay their subs. Default is what triggers a bond claim. The surety then has to decide how to resolve it.
- Indemnification
- The principal's obligation to repay the surety for any claims paid out. This is the big difference between a bond and insurance. With insurance, the insurer absorbs the loss. With a bond, you owe the surety back every dollar they spend, plus legal costs.
- Subrogation
- The surety's legal right to step into the principal's shoes after paying a claim. If the surety pays a subcontractor under a payment bond, the surety can then pursue the principal (or any other responsible parties) for that money.
- Salvage
- Money the surety recovers after paying a claim — usually from the principal under the indemnity agreement, or from collateral, or by pursuing third parties. Higher salvage rates mean the surety loses less money, which helps keep premiums lower for everyone.
- Exoneration
- The release of the surety from further liability under the bond. Once the principal has fulfilled all obligations and the bond term is complete, the surety is exonerated — they are off the hook.
- Collateral
- Assets the surety holds as security — cash, letters of credit, or other liquid assets. Sureties may require collateral for higher-risk principals or to increase bonding capacity. If a claim is paid, the surety draws on the collateral first.
- Loss Ratio
- Claims paid out divided by premiums collected. A loss ratio of 25% means the surety paid $25 in claims for every $100 in premiums. Surety bonds have much lower loss ratios than insurance because the surety can recover from the principal.
- Aggregate Limit
- The maximum total amount the surety will pay across all claims on a bond during a specified period. Some bonds allow multiple claims, but the aggregate limit caps the surety's total exposure.
Federal & Regulatory
- Miller Act
- The federal law (40 U.S.C. 3131-3134) requiring performance and payment bonds on all federal construction contracts over $150,000 (per FAR 28.102-1). It has been the backbone of federal construction bonding since 1935. Read our full guide on Miller Act bond requirements.
- Little Miller Act
- The name for state-level laws modeled after the federal Miller Act. Every state has one, though the dollar thresholds and requirements vary. They require bonds on state and municipal construction projects, just like the Miller Act does for federal work.
- FAR (Federal Acquisition Regulation)
- The rulebook for how the federal government buys things, including construction. FAR Part 28 covers bonding requirements — it is where the $150,000 threshold for Miller Act bonds is codified (FAR 28.102-1).
- SBA Surety Bond Guarantee Program
- A federal program where the Small Business Administration guarantees a portion of the surety's risk, making it easier for small and new contractors to get bonded. Covers contracts up to $9 million (or $14 million for federal contracts). It is a lifeline for contractors who cannot qualify for bonds on their own. Learn more in our Miller Act and SBA guide.
- BMC-84
- The surety bond form required by the FMCSA for freight brokers and freight forwarders. It provides $75,000 in coverage to protect shippers and carriers from financial loss. This is the most common way freight brokers meet their financial responsibility requirement. See our freight broker bond page.
- BMC-85
- A trust fund agreement — the alternative to the BMC-84 bond for freight brokers. Instead of a surety bond, the broker deposits $75,000 in a trust fund. Most brokers choose the BMC-84 bond because it costs far less upfront. Compare them in our BMC-84 vs. BMC-85 guide.
- Treasury List (T-List)
- The U.S. Department of the Treasury's list of surety companies approved to write bonds on federal projects. Officially called Circular 570. If a surety is not on this list, they cannot back federal bonds. It also sets each surety's underwriting limit per bond.
- SFAA (Surety & Fidelity Association of America)
- The main trade association for surety companies in the United States. The SFAA provides standard bond forms, tracks industry statistics, and represents the surety industry before regulators and legislators.
Underwriting
- Bonding Capacity
- The maximum total amount of bonded work a surety will let you take on. There are two numbers: single bond limit (the largest single project you can bond) and aggregate limit (total bonded work across all projects). Your capacity depends on your financials, experience, and track record.
- Working Capital
- Current assets minus current liabilities — basically, the cash and near-cash your business has available to operate day to day. Sureties look at this closely because a contractor who runs out of cash mid-project is the most common reason for bond claims.
- Net Worth
- Total assets minus total liabilities. This is the overall financial strength of your business. Sureties use net worth alongside working capital to gauge whether you can handle the bonded work you are taking on.
- Work-in-Progress (WIP)
- A schedule showing every active project — the contract amount, how much has been billed, what is left to complete, and estimated profit. Sureties review this to see if you are spreading yourself too thin or have problem jobs dragging you down.
- Backlog
- The total dollar amount of work you have under contract but have not yet completed. Some backlog is healthy — it means you have steady work. Too much backlog relative to your resources is a red flag to sureties because it means you might be overextended.
- Character, Capacity, and Capital (The 3 C's)
- The three things every surety evaluates. Character is your reputation and credit history — do you pay your debts and keep your promises? Capacity is your ability to perform — do you have the experience and equipment to do the work? Capital is your financial strength — do you have the working capital and net worth to weather problems? Strong scores across all three get you the best rates and highest bonding capacity.
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Written by BuySuretyBonds.com
Surety bond specialists operating nationwide with direct integrations to Treasury-certified surety carriers. Our platform enables instant approval for license and notary bonds, with 24-48 hour underwriting for commercial bonds. All content is researched from official state and federal sources (.gov) and reviewed by bond industry experts.