6.3 Contract Bonds: Bid, Performance & Payment
Key Takeaways
- A bid bond guarantees the contractor will enter the contract at the bid price if awarded; a performance bond guarantees completion per the contract; a payment bond guarantees payment to subcontractors, laborers, and material suppliers.
- On public works, a payment bond substitutes for the mechanics' lien because public property cannot be liened.
- The federal Miller Act and Arizona's Little Miller Act require performance and payment bonds on public construction above statutory thresholds.
- The AZ ROC license bond (a condition of licensure under Title 32) is distinct from project-specific bid, performance, and payment bonds and is not a substitute for them.
- A surety bond is a credit instrument: if the surety pays a claim, the contractor must reimburse the surety, unlike insurance where the insurer absorbs covered losses.
The Three Project Bond Types
Quick Answer: The three contract bonds tested on the Arizona general contractor exam are the bid bond (guarantees the contractor will enter the contract at the bid price if awarded), the performance bond (guarantees completion of the project per the contract), and the payment bond (guarantees payment to subcontractors, laborers, and material suppliers). They are common on public works and many commercial projects.
A contract bond is a three-party surety agreement in which a surety (typically an insurance company) guarantees that a principal (the contractor) will perform a specific obligation to an obligee (the project owner or the subcontractors and suppliers working under the contractor). The three project bonds below are the core of what the AZ ROC exam tests.
Bid Bond
A bid bond guarantees that a contractor who submits a bid will, if the contract is awarded to that contractor, enter into the contract at the bid price and furnish the required performance and payment bonds. If the contractor refuses to sign the contract or cannot furnish the required bonds, the surety pays the obligee the difference between the low bid and the next lowest responsible bid, up to the bond's penal sum. Bid bonds protect owners from speculative or irresponsible bids that would force rebidding.
Performance Bond
A performance bond guarantees that the contractor will complete the project in accordance with the terms of the contract — including scope, schedule, and quality. If the contractor defaults, the surety may (depending on the bond's terms) complete the work itself, finance the contractor to complete, or pay the owner the cost of completion up to the bond's penal sum. Performance bonds are typically 100% of the contract amount on federal and many public projects.
Payment Bond
A payment bond guarantees that the contractor will pay subcontractors, laborers, and material suppliers who furnish labor or materials to the project. If the contractor fails to pay, the unpaid party may make a claim directly against the surety up to the bond's penal sum. On public works, the payment bond substitutes for the mechanics' lien — because public property cannot be liened, the payment bond is the primary payment security for subs and suppliers on public jobs.
When Are Bonds Required?
| Project type | Bid bond | Performance bond | Payment bond |
|---|---|---|---|
| Federal public works (Miller Act) | Often | Required (100% of contract) | Required (100% of contract) |
| State/local public works (Little Miller Act) | Often | Required per statute/threshold | Required per statute/threshold |
| Private commercial | Often at owner's discretion | Often required by owner/GC | Often required by owner/GC |
| Private residential | Less common | Less common | Less common |
The federal Miller Act requires performance and payment bonds on federal construction contracts exceeding a statutory threshold. Arizona's "Little Miller Act" imposes similar requirements on state and local public works above certain thresholds.
Licensure Bond vs. Project Bonds
It is critical to distinguish the license bond required for AZ ROC licensure from project-specific contract bonds:
| Feature | AZ ROC license bond | Project bonds (bid/performance/payment) |
|---|---|---|
| Purpose | Condition of AZ ROC licensure; protects consumers against licensee violations | Guarantees performance and payment on a specific project |
| Required by | Arizona Registrar of Contractors (A.R.S. Title 32) | Project owner / public agency |
| Scope | All work performed under the license | One defined project |
| Penal sum | Set by AZ ROC by license classification | Typically tied to contract amount |
| Surety | A surety authorized in Arizona | A surety acceptable to the obligee |
Applicants for an AZ ROC license must submit proof of a license bond as part of the application. The license bond is NOT a substitute for project-specific performance or payment bonds, and project bonds are NOT a substitute for the license bond. A contractor may need both at the same time.
Exam tip: the AZ ROC exam distinguishes the statutory license bond (licensure requirement under Title 32) from the contract surety bonds (project-specific under the construction contract). Do not confuse the two.
Comparison Table
| Bond | Guarantees | Obligee | Typical penal sum | When required |
|---|---|---|---|---|
| Bid | Contractor will enter the contract at bid price | Project owner | 5–10% of bid | At bid submission |
| Performance | Contractor will complete the project per contract | Project owner | 100% of contract | After award, before work starts |
| Payment | Contractor will pay subs, laborers, suppliers | Subcontractors / laborers / suppliers | 100% of contract (public) | After award, before work starts |
How Surety Bonds Differ From Insurance
A surety bond is a credit instrument, not insurance. With insurance, the insurer absorbs the covered loss. With a surety bond, if the surety pays a claim, the surety has the right of indemnity against the contractor (principal) — the contractor must reimburse the surety. This is a fundamental distinction tested on the exam.
On a public works project, which bond serves as the primary payment security for subcontractors and material suppliers because public property cannot be liened?
What is the fundamental difference between a surety bond and an insurance policy?