What a Bid Bond Actually Is
If you’re a contractor and you’ve started bidding on public or larger private construction projects, there’s a good chance you’ve run into the requirement to submit a bid bond along with your bid. A lot of contractors, especially those newer to the process, aren’t totally sure what a bid bond is doing or why it’s even required. So let’s just start there.
A bid bond is a type of surety bond. It goes in with your bid when you’re competing for a construction contract, and it essentially tells the project owner that if you win the bid, you’re committed to following through. You’ll sign the contract. You’ll provide whatever performance and payment bonds are required. You’re not just throwing in a number and hoping you don’t actually win.
The bid bond is a guarantee of intent. It protects the project owner from the scenario where a contractor submits the lowest bid, gets awarded the project, and then backs out—either because they realized they underbid, found a better job, or just can’t secure the required bonds to actually perform the work. Without a bid bond, project owners have no real recourse when that happens. They’re left scrambling to re-award the project, probably to the next lowest bidder at a higher price, and they absorb that difference.
With a bid bond in place, the surety company backs up the contractor’s commitment. If the contractor wins and then doesn’t follow through, the project owner can make a claim on the bond and recover the difference between the winning bid and the next lowest bid, up to the amount of the bond.
There are three parties involved in any surety bond, and a bid bond is no different. You have the principal—that’s the contractor who’s bidding the work. You have the obligee—that’s the project owner requiring the bond, whether that’s a government agency, a municipality, a school district, or a private developer. And you have the surety—that’s the bonding company that backs the guarantee.
It’s important to understand that a surety bond is not insurance for the contractor. It’s a financial guarantee. If a valid claim gets paid out by the surety, the contractor is still on the hook to repay the surety. You’re not transferring risk the way you do with insurance. You’re providing a guarantee, and the surety is essentially co-signing for your reliability.
Why Bid Bonds Are Required
Project owners—especially government entities—deal with a lot of contractors. Some of those contractors are well-established and financially stable. Others are newer, smaller, or maybe stretched thin on other jobs. From the owner’s perspective, the bidding process only works fairly if the contractors bidding are actually capable of doing the work and intend to follow through if selected.
Bid bonds exist to filter out contractors who aren’t serious or who haven’t thought through whether they can actually execute the project. When you have to obtain a surety bond to submit a bid, a third party—the bonding company—has already evaluated whether you have the financial strength and track record to take the job on. That’s a real filter.
For public projects—federal, state, county, city, school districts, municipalities—bid bonds are often required by law. At the federal level, the Miller Act requires contractors bidding on federal construction contracts over $150,000 to furnish a bid bond, and then a performance bond and payment bond if they’re awarded the work. The bid bond is the first step in that process.
Most states have their own version of the Miller Act, commonly called Little Miller Acts. These apply to state-funded projects and often to projects funded by counties and municipalities as well. The thresholds and specific requirements vary by state, but the concept is the same. If you’re pursuing public construction work in most parts of the country, bid bonds are part of the process.
Private projects can require them too. Larger developers, commercial construction clients, and owners who are financing major builds often require bid bonds as well. It’s not strictly a government thing. Any owner who wants to run a competitive bidding process and protect themselves from contractors who don’t follow through may require a bid bond.
The Bid Bond Amount and What It Covers
Bid bonds are typically written for a percentage of the total bid amount. The most common requirement is ten percent of the bid, though five percent is also fairly standard depending on the project and the owner’s requirements. Some projects specify a flat dollar amount rather than a percentage. The bid documents will tell you exactly what’s required, and it’s worth reading them carefully before you submit.
The bond amount is not what you pay for the bond. It’s the maximum exposure the surety has if a claim is made. If you bid a two million dollar project and the bid bond is ten percent, the bond amount is two hundred thousand dollars. That’s the maximum the project owner can recover if you win the bid and then fail to execute.
What the project owner actually recovers on a valid bid bond claim is the difference between your bid and the next lowest responsible bid, up to the bond amount. So if you bid two million and the next lowest bidder was at two point one million, and you back out, the owner can claim the hundred thousand dollar difference. The bond amount caps the claim. If the difference exceeds the bond amount, the owner can only collect up to the bond limit.
This is worth understanding clearly: the bid bond isn’t meant to be a profit center for project owners. It’s meant to make them whole for the additional cost they incur when a contractor fails to follow through.
How Bid Bonds Are Priced
Here is one of the things that surprises a lot of contractors when they’re new to the bonding process: bid bonds are often free, or close to it. Many surety companies issue bid bonds at no premium charge, particularly when they’re issued as part of a larger bonding program or when the contractor is already prequalified with the surety.
The cost, if any, is usually a small flat fee or a very modest percentage of the bond amount. Compared to the cost of a performance bond or a payment bond, bid bonds are inexpensive. The real cost of getting bonded is typically in the performance and payment bonds that come after you win the job.
What actually costs something is getting prequalified with a surety company in the first place. The underwriting process—where the surety reviews your financials, your work history, your backlog, and your capacity—takes time and sometimes requires paid professional services like reviewed or audited financial statements. But that’s not the bid bond itself. That’s the cost of building your bonding capacity.
Once you have bonding capacity established with a surety, getting a bid bond issued for a specific project is usually a pretty straightforward process. You provide the bid documents, the bond amount, the project details, and the obligee information, and the bond gets issued.
The Underwriting Side of Things
If you want to be able to bid bonded work, you need to get through surety underwriting first. That process looks at who you are as a contractor and whether the surety is comfortable guaranteeing your performance.
The three areas underwriters focus on most are often referred to as the three C’s of surety: capital, capacity, and character. Capital is your financial strength. Capacity is your ability to actually perform the work given your equipment, staff, and current worklog. Character speaks to your reputation and track record.
Financial Statements
For smaller bonds, a personal financial statement or a simple company balance sheet might be enough. For larger bonds—and the thresholds vary by surety, but typically once you’re looking at six or seven figure bond amounts—most sureties are going to want Compiled, Reviewed, or Audited financial statements prepared by a CPA. The larger the bond amount, the more rigorous the financial requirements tend to be.
Sureties are looking at your working capital, your net worth, your debt levels, your profitability, and whether your business is trending in the right direction. A contractor who has strong assets relative to their liabilities and shows consistent profitability is going to have an easier time getting bonded than one who is highly leveraged or has been losing money.
Work History and Experience
Your track record matters. Have you completed similar work before? Did you complete it on time and within budget? Do you have references from project owners and architects who can speak to your performance? Sureties want to see that you know how to execute projects of the type and size you’re bidding. A contractor who has never done a public works project bidding on a ten million dollar highway contract is going to face more scrutiny than one who has a track record of successfully completing projects of that scope.
Current Workload and Backlog
Capacity isn’t just about what you’ve done—it’s about what you’re currently doing. If your company is already stretched thin on existing projects, taking on another large job creates real risk. Sureties look at your current work in progress relative to your company’s capacity to understand whether you can actually absorb a new project without overextending.
Credit and Character
Personal and business credit history matters. Outstanding judgments, tax liens, or a history of payment disputes with subcontractors or suppliers are red flags in the underwriting process. Character in the surety context also includes your professional reputation—are you known as someone who deals honestly with project owners, subcontractors, and suppliers?
Getting Set Up Before You Need a Bond
One of the best things a contractor can do is get bonding capacity in place before they have a specific project in front of them with a deadline. When a bid due date is looming and you haven’t been through the underwriting process yet, it creates real stress and sometimes leads to contractors either missing out on the project or getting a bond through a less favorable channel because they’re in a rush.
Working with an agency like Uncle Sheldon to get prequalified with a quality surety ahead of time means that when a bid bond opportunity comes up, you’re ready. The underwriting is already done. Issuing the bond for a specific bid is fast. You can compete for work without scrambling at the last minute.
Getting prequalified also gives you a better sense of your bonding capacity—what single project limit and aggregate limit the surety will support. That’s valuable information for your business planning. If you know your current bonding capacity is five million dollars on a single project and ten million in aggregate, you know what size work you can realistically pursue.
Bid Bonds and What Comes After
A bid bond is the beginning of the surety bond story on a construction project, not the end of it. When you win a bid on a project that required a bid bond, the project owner is almost certainly going to require performance and payment bonds before the contract gets signed.
Performance Bonds
A performance bond guarantees that you’ll complete the project in accordance with the contract. If you abandon the project, go bankrupt, or fail to perform to the contract’s requirements, the surety steps in. The surety might find another contractor to complete the work, pay the project owner the cost of completing the work, or in some cases complete the work themselves. Performance bonds are typically written for the full contract value.
Payment Bonds
A payment bond guarantees that you’ll pay your subcontractors, suppliers, and laborers. If you don’t pay the people who helped you complete the project, the payment bond protects them. Payment bonds are critically important on public projects because subcontractors and suppliers on public work can’t file a mechanic’s lien against a government property the way they can on a private project. The payment bond is their protection.
Payment bonds are also typically written for the full contract value.
The bid bond, performance bond, and payment bond together form what’s often called the contract bond package. They’re related, and the underwriting that supports your bid bond is the same underwriting that supports the performance and payment bonds. That’s why getting prequalified with a surety before the project is awarded is important—the surety needs to know you’re bondable for the full contract before they’ll issue a bid bond for the competitive phase.
Public Projects vs Private Projects
The mechanics of bid bonds are similar on public and private projects, but there are some differences worth knowing about.
On public projects—federal, state, and local government contracts—the requirements are set by statute. The Miller Act and various state Little Miller Acts specify what bonds are required, what the bond amounts must be, and what forms are acceptable. There isn’t a lot of flexibility. If the law says you need a bid bond for a certain project, you need a bid bond. The forms used are often standardized as well.
On private projects, the requirements are set by the project owner or developer, and there’s more variability. Some private owners require bonds on the same terms as public projects. Others have their own forms and their own requirements. Some private projects don’t require bonds at all. If you’re bidding a private project and the bid documents require a bond, read those documents carefully to understand exactly what’s being asked for—the form, the amount, and any specific language requirements.
Some surety forms are acceptable to some obligees but not others. Government agencies sometimes have approved bond forms that they require you to use. If there’s any question about whether a bond form will be accepted, it’s worth clarifying with the owner or their representative before you submit.
What Happens If You Win and Then Can’t Bond
This is a scenario that happens more than you’d think, and it’s worth talking about directly. A contractor bids a job, wins, and then goes to get the performance and payment bonds—only to find out their bonding capacity isn’t sufficient, their surety won’t approve the bonds, or they can’t get bonded at all.
When that happens, the project owner can make a claim on the bid bond. The contractor is on the hook to the surety for whatever gets paid out. And the contractor’s relationship with that surety—and potentially with other sureties in the market—is damaged.
It’s one of the reasons why understanding your bonding capacity before you bid is so important. Winning a job you can’t bond is not just a headache—it has real financial and reputational consequences. Don’t bid bonded work unless you know your bonding capacity can support what you’re bidding.
If you’re working with Uncle Sheldon, we’ll help you understand those limits and make sure you’re not out there bidding work that’s going to put you in a bad position.
Consent of Surety
Some bid documents require what’s called a consent of surety, which is a letter from your surety company confirming that they will issue the required performance and payment bonds if you’re awarded the contract. This is different from the bid bond itself—it’s a pre-commitment from the surety to bond the finished project.
Not every project requires it, but when they do, it’s usually because the project owner wants an extra level of confidence that the bonds will actually be issued at award time. If you’re bidding work that requires a consent of surety, talk to us early in the process so we can work with the surety to get that letter together before the bid deadline.
Finding the Right Surety Market
Not all surety companies are the same, and not all surety markets work the same way. There are standard commercial surety markets that work well for contractors who have strong financials and a clean track record. There are also markets that specialize in contractors who are newer, smaller, or who have some complications in their history. The rates, terms, and service quality vary.
As an independent agency, Uncle Sheldon isn’t tied to a single surety. We work with multiple markets and can find the right fit for where you are in your business. Whether you’re a well-established contractor looking for competitive terms or a smaller contractor trying to get into bonded work for the first time, we can work with you on that.
We also understand that the surety relationship matters over time, not just on the first bond. A surety that’s difficult to work with at claims time or that drops contractors at the first sign of trouble isn’t a good long-term partner. We try to match contractors with sureties that are going to be reasonable partners as your business grows.
The Claims Process on a Bid Bond
We hope you never need to deal with this from either side, but it’s worth understanding how bid bond claims work.
If a contractor wins a bid and then fails to execute—doesn’t sign the contract, doesn’t provide the required performance and payment bonds, or otherwise refuses to proceed—the project owner notifies the surety and makes a formal claim. The surety investigates to confirm the claim is valid. Was the contractor actually awarded the job? Did they refuse or fail to proceed as required?
If the claim is valid, the surety pays the project owner the difference between the winning bid and the next lowest bid, up to the bond amount. And then the surety looks to the contractor to repay that amount. That right of repayment from the principal is a fundamental feature of surety bonds that distinguishes them from insurance.
From a contractor’s perspective: don’t walk away from a bid bond commitment without very good reason and without talking to your surety or bonding agent first. There may be legitimate defenses to a bid bond claim in certain circumstances—a material mistake in the bid, for example—but that’s a situation where you need legal and professional guidance quickly.
Working With Uncle Sheldon on Bid Bonds
We work with contractors at all stages of the bonding process. If you’ve never been bonded before and want to understand what you need to do to get there, we can walk you through it. If you’re already established with a surety but need help with a specific project or want to see if there’s a better market for your program, we can help with that too.
The process starts with a conversation. We want to understand your business—what kind of work you do, how long you’ve been in business, what size projects you typically pursue, and where you want to take things. From there we can help you think through the underwriting process, what documents you’ll need, and what the right bonding market might look like for your situation.
We are an independent agency and brokerage, which means we work for you, not for any single surety. Our job is to find the right fit for your operation and help you build the bonding capacity you need to pursue the work you want.
Bid bonds are the first step in a bigger picture. Getting them right matters. We’re here to help you do that.