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Contractor Guide to Surety Bonding
Everything Contractors Need to Know About Surety Bonds — in One Place
Surety bonding is one of the most important tools in a contractor's business — and one of the least understood. Whether you're trying to figure out how to get bonded for the first time or looking to increase your bonding capacity so you can compete for bigger work, this guide covers it all.
We built this guide because most surety information online is written for insurance professionals, attorneys, or surety underwriters — not for the contractors who actually need the bonds. At Grit Insurance Group, we believe contractors deserve plain-English answers from people who understand the trades and the business of bonding. That's what you'll find here.
This is your starting point. Each section below covers a core topic in surety bonding and links to a dedicated page with deeper detail. Read through the overview, then dig into the topics that matter most to your situation.
What Is a Surety Bond?
A surety bond is a three-party financial guarantee. The contractor (principal) promises to fulfill an obligation — usually completing a construction project — to a project owner (obligee). A surety company backs that promise by guaranteeing to the obligee that if the contractor fails to perform, the surety will step in and make it right.
The critical difference between a surety bond and insurance is who gets protected. Insurance protects you. A surety bond protects the other party. And if the surety ever has to pay out on a bond claim, you're responsible for paying them back. It's a guarantee of your performance, not a safety net that absorbs your losses.
Understanding this distinction changes how you think about bonding — and it's the foundation everything else in this guide builds on.
Types of Surety Bonds
Surety bonds fall into two broad categories. Contract surety bonds are tied to construction contracts and include bid bonds, performance bonds, payment bonds, and maintenance bonds. These are the bonds you need to bid and perform work on public and many private projects. Commercial surety bonds cover obligations outside of construction contracts — license and permit bonds, auto dealer bonds, freight broker bonds, notary bonds, and ERISA bonds are common examples.
As a contractor, you'll encounter contract surety bonds most often. Bid bonds get you to the table. Performance bonds guarantee you'll complete the work. Payment bonds guarantee you'll pay your subs and suppliers. Maintenance bonds guarantee your work after the project is complete. Understanding which bonds apply to your projects — and when each is required — is fundamental to operating in bonded construction.
How Contractors Qualify for Bonds
Sureties evaluate contractors on three core areas — capital, capacity, and character. Capital is your financial strength: working capital, net worth, profitability, and cash flow. Capacity is your ability to perform: your experience, your team, your equipment, and your current workload. Character is your reliability: personal credit, track record on previous projects, payment history with subs and suppliers, and any past claims or legal issues.
Every surety weighs these three areas when deciding whether to issue a bond and how much capacity to extend. If all three are strong, getting bonded is straightforward. If one or more areas need work, knowing where you stand gives you a clear path to qualify. That's exactly what our Contractor Bond Readiness Review is designed to help you figure out.
How Contractors Increase Bonding Capacity
Your bonding capacity isn't fixed — it grows as your business grows, if you manage the right variables. Sureties increase your limits when they see strengthening financials, consistent profitability, clean work-in-progress reporting, experienced project management, and a track record of completing bonded work successfully.
The contractors who grow their capacity fastest are the ones who treat their surety relationship as a strategic partnership. That means keeping financials current and CPA-prepared, maintaining an accurate WIP schedule, communicating proactively with your surety and bond agent, and investing in the financial infrastructure — whether that's a construction-focused CPA, a fractional CFO, or a stronger banking relationship — that supports larger programs.
If you've hit a bonding ceiling and aren't sure why, this is the section to dig into.
The Miller Act and Federal Bonding Requirements
The Miller Act is the federal law that requires performance and payment bonds on all federal construction projects over $150,000. It's been in effect since 1935 and is the reason surety bonding is a fundamental part of public construction in the United States.
Every state has its own version of the Miller Act — commonly called a "Little Miller Act" — that extends similar bonding requirements to state and local government projects. If you want to compete for government work at any level, understanding these laws and the bonding requirements they impose is essential.
The Miller Act also establishes the payment bond claim process that protects subcontractors and suppliers on federal projects. If you're working as a sub on a bonded federal job, knowing your claim rights — including the strict 90-day notice and one-year filing deadlines — can be the difference between getting paid and losing your right to recovery.
Building an Underwriting File
When you apply for a bond — especially for larger projects or when establishing a bond program — the surety needs a complete picture of your business. That picture is called the underwriting file, and the quality of your submission directly affects how quickly you get approved, what capacity you receive, and what rate you pay.
A strong underwriting file typically includes CPA-prepared company financial statements, personal financial statements for all significant owners, a work-in-progress schedule, a completed project list, bank references, your company resume, and any project-specific information the surety requests. Having this package organized and current before you need it — rather than scrambling when a bid deadline is approaching — puts you in a significantly stronger position.
This is one of the most practical things you can do to improve your bonding experience: build your file once, keep it updated, and have it ready to go when opportunity knocks.
Building an Underwriting File — Full Page
More Topics in the Bond Education Center
Beyond this guide, our Bond Education Center covers the specific questions contractors ask most about surety bonding. Each page answers a focused question with the detail you need to make informed decisions.
What Credit Score Is Needed for a Surety Bond?
Why Do Contractors Get Declined for Bonds?
How Much Do Contractor Bonds Cost?
Surety Bonds vs Insurance — What's the Difference?
Ready to Take the Next Step?
If you've read through this guide and you're ready to move forward — whether that means getting your first bond, reviewing your current program, or building a strategy to grow your capacity — our team is here to help. If you're not sure where you stand yet, start with our Bond Scorecard to see how surety-ready your business is right now.
Take the Contractor Bond Scorecard