The Miller Act Explained: What Federal Contractors Need to Know in 2026

If you bid federal construction work, the Miller Act is one of the most important laws to understand. It governs when prime contractors on federal public construction projects must furnish performance and payment bonds, and it helps protect both the federal government and the subcontractors and suppliers working on those jobs.

This guide explains what the Miller Act is, when it applies, why it matters, and how it affects contractors pursuing federal projects in 2026.

What Is the Miller Act?

The Miller Act is a federal law that requires bonding on certain federal public construction contracts. In practical terms, it means that before many federal construction contracts are awarded, the prime contractor must furnish both a performance bond and a payment bond.

The purpose is twofold:

• The performance bond protects the federal government if the contractor fails to complete the work.
• The payment bond protects subcontractors and suppliers if they are not paid.

When Does the Miller Act Apply?

The Federal Acquisition Regulation implements the Miller Act bonding requirement at a threshold of more than $150,000 for federal construction contracts. That means for most federal contracts exceeding $150,000 for the construction, alteration, or repair of a public building or public work, the contractor must provide both bonds.

Some summaries still mention the historical statutory threshold of more than $100,000, but current federal procurement rules for construction contracts use the $150,000 threshold under the FAR.

What Bonds Are Required?

The Miller Act generally requires:

• A performance bond for the protection of the federal government.
• A payment bond for the protection of subcontractors and suppliers.

The payment bond is often set at the total contract amount unless the contracting officer determines that amount is impractical, in which case the amount may be adjusted according to applicable rules.

Why the Miller Act Matters

On private construction, unpaid subcontractors may have lien rights against the property. Federal public property is different, so the payment bond serves as a substitute protection mechanism for many unpaid project participants.

For prime contractors, the Miller Act matters because it directly affects bid eligibility, bonding needs, cash flow planning, and surety relationships. If a contractor cannot qualify for the required bonds, it may not be able to win or start the project.

For subcontractors and suppliers, the Miller Act matters because it creates a path to recover payment when statutory and procedural requirements are met.

What About State Public Projects?

The Miller Act applies to federal projects. Many states have similar laws known as Little Miller Acts that impose parallel bonding requirements on state and local public works, although thresholds and procedures vary from state to state.

Contractors pursuing public work should understand both the federal Miller Act and the applicable state-level public bonding laws in their operating territory.

Final Thoughts

The Miller Act remains a cornerstone of federal construction bonding. If your business wants to pursue federal public work in 2026, understanding this law is not optional.

A clear Miller Act strategy helps contractors prepare for underwriting, satisfy procurement requirements, and avoid last-minute surprises that can delay contract awards.

Contact Jobsite Insure
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Phone: 406 401 7220

Ready to win bigger jobs with less friction? Get in touch today and we’ll help you put a practical bonding plan in place.

-Klinton Jones
Principal Insurance Broker