Understanding the Miller Act: A Contractor's Complete Guide

What Is the Miller Act?

The Miller Act, codified at 40 U.S.C. §§ 3131–3134, is the foundational federal statute governing surety bond requirements on public construction projects in the United States. Originally enacted in 1935, the Miller Act was designed to protect the federal government and the workers and suppliers who contribute to federal construction projects by mandating that contractors furnish performance bonds and payment bonds before being awarded any federal construction contract exceeding $150,000.

The law was born out of a practical necessity. Unlike private construction, where subcontractors and material suppliers can file mechanics' liens against the property to secure payment, federal property cannot be subjected to liens. The Miller Act bridges this gap by requiring a payment bond that functions as a substitute for lien rights, ensuring that those who furnish labor and materials on federal projects have a reliable mechanism for recovering what they are owed.

Understanding the Miller Act requires familiarity with the three parties involved in every surety bond arrangement:

• Obligee (Federal Government): The entity that requires the bond and is protected by it. On Miller Act projects, the obligee is always the federal government agency awarding the contract, such as the U.S. Army Corps of Engineers, the General Services Administration, or the Department of Veterans Affairs.
• Principal (Contractor): The general contractor or prime contractor who is awarded the federal construction contract. The principal is the party required to purchase the bond and is ultimately responsible for fulfilling the contract obligations.
• Surety (Bonding Company): The insurance company or surety company that issues the bond and guarantees the contractor's performance and payment obligations. If the contractor defaults, the surety is obligated to step in and ensure the project is completed and subcontractors are paid.

The Miller Act applies to virtually every type of federal construction project, including the construction, alteration, or repair of any public building or public work of the United States. This encompasses everything from military base construction and federal courthouse renovations to highway projects administered by federal agencies and Veterans Affairs hospital expansions. If the federal government is the project owner and the contract exceeds the $150,000 threshold, contract surety bonds are required under the Miller Act.

Miller Act Bond Requirements

The Miller Act imposes specific bonding requirements that contractors must satisfy before work begins on any qualifying federal construction project. These requirements cover three primary bond types: performance bonds, payment bonds, and bid bonds. Each serves a distinct purpose in protecting the interests of the government, subcontractors, and suppliers.

Performance Bonds

A performance bond guarantees that the contractor will complete the project according to the terms and specifications of the contract. Under the Miller Act, the performance bond must be equal to 100% of the contract price. If the contractor fails to complete the work, abandons the project, or otherwise defaults on the contract, the surety company must either arrange for the project to be completed by another contractor or compensate the federal government for the cost of completion.

Performance bonds protect the obligee, the federal government, from the financial consequences of contractor default. They provide assurance that the project will be finished on time and to specification, regardless of what happens to the original contractor.

Payment Bonds

A payment bond guarantees that the contractor will pay all subcontractors, laborers, and material suppliers who contribute to the project. Because federal property cannot be subjected to mechanics' liens, the payment bond serves as the primary remedy for unpaid parties on federal construction projects.

Under current law (as amended by the Construction Industry Payment Protection Act of 1999 and implemented by FAR 28.102-2), the payment bond must equal 100% of the original contract price — the same as the performance bond. If the contract price increases, additional protection equal to 100% of the increase is required. The contracting officer has discretion to reduce this amount only by making a written determination supported by specific findings, but the payment bond must never be less than the performance bond amount.

Bid Bonds

While the Miller Act itself focuses on performance and payment bonds, federal procurement regulations under the Federal Acquisition Regulation (FAR) also require bid bonds for competitively bid federal construction contracts. A bid bond guarantees that if a contractor is awarded the project, they will enter into the contract and furnish the required performance and payment bonds. Bid bonds are typically set at 20% of the bid amount, with a maximum penal sum of $3 million.

Bid bonds protect the government from contractors who submit artificially low bids and then withdraw, causing delays and additional costs in the procurement process. At Surety Specialist, bid bonds are always free to the contractor. We believe that no contractor should pay out of pocket just for the right to compete for work. Our bid bond program is designed to remove barriers and help contractors pursue every opportunity available to them.

Who Is Protected by the Miller Act?

One of the most important aspects of the Miller Act is understanding exactly who has the right to make a claim against the payment bond. The statute creates a clear hierarchy of protection based on the claimant's contractual relationship with the prime contractor.

First-Tier Subcontractors and Suppliers

First-tier subcontractors and suppliers are those who have a direct contractual relationship with the prime contractor. These parties enjoy the strongest protections under the Miller Act. They have an automatic right to file a claim against the payment bond without any advance notice requirement to the prime contractor. If the prime contractor fails to pay a first-tier subcontractor or supplier, that party can proceed directly to filing a lawsuit to recover the amount owed.

Second-Tier Subcontractors and Suppliers

Second-tier subcontractors and suppliers are those who have a direct contractual relationship with a first-tier subcontractor but no direct contract with the prime contractor. These parties are also protected by the Miller Act, but they must follow an additional procedural step. Second-tier claimants are required to provide written notice to the prime contractor within 90 days of the date on which they last performed work or supplied materials. This 90-day notice requirement is critical. Failure to provide timely notice extinguishes the second-tier party's right to claim against the payment bond.

Third-Tier and Beyond

Parties that are three or more tiers removed from the prime contractor, meaning they have no direct contractual relationship with either the prime contractor or a first-tier subcontractor, have no claim rights under the Miller Act. This is one of the most significant limitations of the statute. A material supplier who sells to a second-tier subcontractor, for example, cannot make a Miller Act payment bond claim regardless of the amount owed. These parties must rely on other legal remedies, such as breach of contract claims against the party with whom they have a direct agreement.

Understanding your position in the contractual chain is essential before beginning work on any federal construction project. If you are a lower-tier subcontractor or supplier, you should take steps to clarify your tier status and, when possible, negotiate a direct contract with either the prime contractor or a first-tier subcontractor to preserve your Miller Act claim rights.

How to File a Miller Act Payment Bond Claim

Filing a Miller Act payment bond claim is a structured legal process with specific requirements and strict deadlines. Missing any step can result in the permanent loss of your claim rights. The following is a detailed, step-by-step guide to the payment bond claim process under the Miller Act.

Step 1: Identify the Bond

Before you can file a claim, you need to obtain a copy of the payment bond. Under the Miller Act, the contracting agency is required to provide a copy of the bond to any person who submits a written request. You can request this information from the federal contracting officer overseeing the project. The bond will identify the surety company, the bond amount, and the terms of coverage. Having this information is essential before you proceed with your claim.

Step 2: Serve Written Notice on the Prime Contractor

If you are a second-tier subcontractor or supplier, you must serve written notice on the prime contractor stating the amount claimed and identifying the party to whom you provided labor or materials. This notice must be sent via registered mail (as specified in the statute) or certified mail with return receipt requested (widely accepted in practice) to create a clear record of delivery. While first-tier claimants are not required to provide this notice, it is considered best practice for all claimants to send formal written notice to the prime contractor and the surety to establish a clear record and facilitate resolution.

Step 3: Meet the 90-Day Notice Deadline (Second-Tier Claimants)

Second-tier subcontractors and suppliers must ensure their written notice is received by the prime contractor within 90 days after the date they last performed work or last furnished materials on the project. This is a firm deadline with no exceptions. If you miss the 90-day window, your claim rights under the Miller Act are permanently forfeited. Mark your calendar, set reminders, and send notice well in advance of the deadline to account for mailing times.

Step 4: Wait 90 Days After Last Furnishing Labor or Materials

The Miller Act requires that claimants wait a minimum of 90 days after the date of last work or last delivery of materials before filing a lawsuit. This waiting period is designed to give the prime contractor and surety an opportunity to investigate the claim and make payment voluntarily. During this period, you should continue documenting your claim, gathering invoices, delivery receipts, correspondence, and any other evidence supporting the amount owed.

Step 5: File Suit in Federal District Court

If payment is not received during the 90-day waiting period, the claimant may file a lawsuit in the United States District Court for the district in which the federal construction project is located. This is a jurisdictional requirement under the Miller Act. You cannot file in state court, and you cannot file in a federal court in a different district. The complaint must name the surety company as a defendant and clearly state the amount owed, the work performed or materials furnished, and the basis for the claim.

Step 6: File Within the 1-Year Deadline

The Miller Act imposes an absolute deadline for filing suit. The lawsuit must be commenced no later than one year after the date on which the claimant last performed labor or last furnished materials on the project. This one-year statute of limitations is strictly enforced by the courts. Even if you have a meritorious claim for hundreds of thousands of dollars, filing one day late will result in your case being dismissed. There are no extensions, tolling provisions, or equitable exceptions to this deadline.

Miller Act vs. Little Miller Acts

The federal Miller Act governs bonding requirements on federal construction projects, but every state has enacted its own version of bonding legislation for state and local public works projects. These state statutes are commonly known as "Little Miller Acts," and while they are modeled on the federal law, they can differ significantly in their requirements, thresholds, claim procedures, and deadlines.

Understanding the differences between the federal Miller Act and the applicable Little Miller Act in the state where you are working is critical for contractors, subcontractors, and suppliers. Key areas where these statutes commonly differ include:

• Contract Thresholds: The federal Miller Act applies to contracts exceeding $150,000, but state thresholds vary widely. Some states require bonds on all public works contracts regardless of value, while others set thresholds as high as $100,000 or more.
• Notice Requirements: State Little Miller Acts may impose different notice deadlines, require notice to different parties, or mandate specific forms and methods of delivery that differ from the federal 90-day rule.
• Claim Filing Deadlines: The one-year suit deadline under the federal Miller Act is not universal. State statutes may allow shorter or longer filing periods, and some states measure the deadline differently, from project completion rather than last furnishing of labor or materials.
• Protected Parties: Some states extend protection beyond second-tier subcontractors and suppliers, covering third-tier or even lower-tier parties. Others may limit protections more narrowly than the federal statute.
• Bond Amounts: While the federal Miller Act requires both performance and payment bonds at 100% of the contract price, state requirements may differ, with some states allowing reduced amounts for smaller contracts.

Contractors who work across multiple states must be diligent about understanding the specific Little Miller Act provisions in each jurisdiction. Below are links to our detailed state-specific contract bond guides for some of the most active construction markets:

• Florida Contract Bonds & Little Miller Act Guide
• Texas Contract Bonds & State Bonding Requirements
• Arizona Contract Bonds & Public Works Bonding
• North Carolina Contract Bonds & Bonding Laws
• Georgia Contract Bonds & State Bond Requirements

When bidding on state or municipal projects, always verify the specific bonding requirements with the awarding authority and consult with a knowledgeable surety bond professional to ensure full compliance with the applicable Little Miller Act statute.

Key Miller Act Deadlines

The Miller Act imposes several critical deadlines that claimants must observe to preserve their rights. Missing any of these deadlines can permanently bar your ability to recover payment. The following table summarizes the most important Miller Act deadlines that every contractor, subcontractor, and supplier should know.

These deadlines run from the date of last furnishing of labor or materials, not from the date of contract completion or the date you first became aware of non-payment. It is essential to maintain accurate records of exactly when your last work was performed or your last materials were delivered. Minor punch list items, warranty work, or corrective work performed after substantial completion can potentially extend these deadlines, but the safest approach is to begin the claim process as soon as a payment dispute arises.

How to Qualify for Miller Act Bonds

Qualifying for Miller Act contract bonds requires contractors to demonstrate financial stability, professional competence, and a track record of reliable performance. Surety underwriters evaluate bond applicants using a framework commonly known as the Three Cs of Surety, which provides a comprehensive assessment of the contractor's ability to fulfill the obligations of a federal construction contract.

Character (Credit)

Character refers to the contractor's personal and business credit history, reputation, and integrity. Surety underwriters review personal credit scores of the business owners, check for any history of bankruptcies, tax liens, or judgments, and evaluate the contractor's track record with previous surety companies. A strong credit profile signals that the contractor takes financial obligations seriously and is likely to manage project funds responsibly. Contractors should aim to maintain personal credit scores above 680 and keep business credit reports clean of any derogatory marks.

Capacity (Experience and Equipment)

Capacity refers to the contractor's ability to perform the work. Underwriters assess the contractor's experience with projects of similar size, scope, and complexity to the one being bid. They evaluate the contractor's workforce, equipment inventory, project management systems, and organizational structure. A contractor bidding on a $5 million federal project who has only completed $500,000 jobs will face significant scrutiny. Building capacity incrementally by taking on progressively larger projects is the most effective path to qualifying for major Miller Act bonds.

Capital (Financial Strength)

Capital refers to the contractor's financial strength as reflected in their balance sheet, income statements, and cash flow. Surety underwriters look at working capital, net worth, debt-to-equity ratios, and the overall liquidity of the business. For Miller Act bonds on larger federal projects, sureties typically require CPA-prepared financial statements, and for single bond amounts exceeding $500,000, audited financial statements are often required. Key financial benchmarks include a current ratio above 1.5, positive working capital, and a healthy backlog-to-equity ratio.

If you are a contractor looking to pursue federal construction work, the first step is to establish a relationship with a surety bond professional who understands the Miller Act bonding process. At Surety Specialist, we work with over 80 surety companies to find the best fit for your qualifications, whether you are a startup contractor seeking your first bid bond or an established firm looking to increase your bonding capacity for multi-million dollar federal projects. Learn more about performance bonds and bid bonds on our dedicated resource pages.

Common Miller Act Mistakes

Despite the clear requirements of the Miller Act, contractors, subcontractors, and suppliers frequently make avoidable errors that result in the loss of their claim rights or create unnecessary complications on federal projects. Being aware of these common mistakes can help you protect your interests and avoid costly missteps.

1. Not Giving Timely Notice

The single most common and most devastating mistake is failing to provide the required 90-day written notice to the prime contractor. This mistake almost exclusively affects second-tier subcontractors and suppliers who may not realize they have a notice obligation or who lose track of the deadline. By the time they consult an attorney and discover they needed to send notice, the 90-day window has often already closed. The fix is straightforward: send written notice via certified mail as soon as you suspect a payment problem, well before the 90-day deadline approaches. Even if you are a first-tier claimant who is not legally required to give notice, sending notice early is always advisable to create a paper trail and demonstrate good faith.

2. Not Preserving Claim Rights

Many subcontractors sign lien waivers, progress payment releases, or change order agreements that inadvertently waive their Miller Act claim rights. Before signing any document on a federal project, review the language carefully to ensure it does not contain a blanket waiver of your right to claim against the payment bond. Additionally, some contractors attempt to include "pay-if-paid" clauses that condition subcontractor payment on the prime contractor receiving payment from the government. While the enforceability of such clauses varies, subcontractors should be aware that their Miller Act rights exist independently of any contractual payment conditions between the prime and the government.

3. Filing in the Wrong Court

Miller Act lawsuits must be filed in the United States District Court for the district where the federal project is located. Filing in state court, filing in a federal court in the wrong district, or filing in the contractor's home district rather than the project district are all jurisdictional errors that can result in dismissal. Before filing, verify the exact location of the project and identify the correct federal district court with jurisdiction. If the project spans multiple districts, consult with an attorney to determine the proper venue.

4. Missing the 1-Year Filing Deadline

The one-year statute of limitations for filing a Miller Act lawsuit is an absolute bar. Courts have consistently refused to extend this deadline for any reason, including ongoing settlement negotiations, promises of future payment from the contractor, or discovery of additional damages after the deadline has passed. Do not allow settlement discussions or payment promises to lull you into inaction. If you have not been paid and the one-year deadline is approaching, file suit immediately to preserve your rights. You can always continue negotiations while the lawsuit is pending, but you cannot file suit after the deadline has passed.

5. Failing to Document Work and Materials

A Miller Act claim is only as strong as the evidence supporting it. Contractors and suppliers who fail to maintain detailed records of work performed, materials delivered, correspondence with the prime contractor, and payment history often find themselves unable to prove the amount owed or the date of last furnishing. Maintain daily logs, delivery receipts, signed purchase orders, invoices with proof of delivery, and written communications throughout the project. These records are essential not only for Miller Act claims but for any contract dispute resolution process.

Avoiding these mistakes requires vigilance, organization, and a basic understanding of the Miller Act's procedural requirements. When in doubt, consult with a surety bond professional or construction attorney before deadlines expire. The cost of early legal advice is always less than the cost of a lost claim.