1.4 Arizona Prompt Pay Act, Contracting Requirements & Mechanic's Liens

Arizona Prompt Pay Act, Contracting Requirements & Mechanic's Liens

Contract administration, timely payment cash flows, and lien rights are vital operational topics for mechanical contractors. Arizona has enacted comprehensive legislation to ensure that contractors and suppliers are paid promptly and that consumers are protected through mandatory contract terms and formal lien notice procedures.

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1. The Arizona Prompt Pay Act (A.R.S. §§ 32-1181 through 32-1188)

The Arizona Prompt Pay Act governs payment schedules on both private commercial/residential construction projects and public works. It prevents project owners and general contractors from unreasonably withholding progress billings and retainage from trade subcontractors.

The Mandatory Billing & Payment Cycles

                               PROMPT PAY PAYMENT TIMELINE
                                            │
   Day 0                   Day 14           │            Day 21                    Day 28
     │                       │              │              │                         │
     ├───────────────────────┼──────────────┼──────────────┼─────────────────────────┤
     │                       │              │              │                         │
Subcontractor /         Owner Approves      │      Owner Pays Prime         Prime Pays Subcontractor
Prime Submits          Progress Billing     │       Within 7 Days            Within 7 Days of Receipt
Progress Billing       (Deemed Approved     │     of Billing Approval        (1.5%/Mo Interest if Late)
                      if No Notice in 14d)  │

1. Owner Approval Window (14 Days): When a prime contractor submits a monthly progress billing to a property owner, the owner has 14 calendar days to approve or certify the billing. If the owner fails to issue a written objection specifying the defective work or disputed items within 14 days, the billing is deemed certified and approved by operation of law.
2. Owner-to-Prime Payment (7 Days): The owner must make payment to the prime contractor within 7 calendar days after the billing is certified and approved (total cycle: 21 days from billing submission).
3. Prime-to-Subcontractor Payment (7 Days): Under A.R.S. § 32-1183, upon receiving payment from the owner, the prime contractor must pay each mechanical subcontractor within 7 calendar days for the subcontractor's approved portion of work.
4. Subtier-to-Supplier Payment (7 Days): Subcontractors must likewise pay their lower-tier subcontractors and material suppliers within 7 calendar days of receiving funds.

Statutory Overdue Interest & Work Suspension

• 1.5% Monthly Interest (18% Annually): Overdue payments begin accruing interest immediately on the 8th day at the statutory rate of 1.5% per month (18% per annum), or at the contract interest rate if specified higher in the written agreement.
• Right to Suspend Performance: If payment is not made within the statutory timeframes, a contractor or subcontractor may suspend work after providing 7 calendar days written notice to the owner/prime contractor, without being in breach of contract.

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2. Mandatory Elements in Arizona Residential Contracts (A.R.S. § 32-1158)

Under A.R.S. §§ 32-1158 and 32-1158.02, a licensed contractor performing residential work must provide the owner with a written contract and deliver copies of the signed contract and required documents at signing. Combined with the license-number posting duty in A.R.S. § 32-1124(B), a defensible Arizona residential HVAC contract contains:

1. Legal Business Identification: Contractor's exact legal business name, registered DBA (if applicable), physical office address, and telephone number.
2. ROC License Information: The contractor's current ROC License Number and exact License Classification (e.g., ROC #345678, Class CR-39 Dual Air Conditioning and Refrigeration).
3. Customer & Property Data: Customer's full name, billing address, and job site street address / legal description.
4. Detailed Scope of Work: A comprehensive description of the work to be performed and equipment to be installed, including equipment manufacturer brands, models, BTUh heating/cooling capacity, SEER2 ratings, and warranty terms.
5. Schedule of Work: Estimated start date and substantial completion date.
6. Financial Terms & Payment Schedule: Total contract price, amount of initial deposit/down payment, and milestone-based progress draw schedule.
7. Right-to-Cure Notice: Mandatory statutory disclosure advising the homeowner of Arizona's Purchaser Right-to-Cure law before initiating legal action.
8. Recovery Fund Notice: Clear written notification explaining the existence of the Arizona Residential Contractors' Recovery Fund and providing ROC contact information.

[!IMPORTANT] Contract Drafting Rule: Omitting the ROC license number from a written bid, estimate or contract violates A.R.S. § 32-1124(B) and is, at the Registrar's discretion, grounds for discipline under A.R.S. § 32-1154(A)(12) (failure in any material respect to comply with the chapter). Note that § 32-1124(C) says such a posting violation is not grounds for voiding the contract or defeating the contractor's claim.

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3. Arizona Mechanic's Liens (A.R.S. Title 33, Chapter 7, Article 6)

A mechanic's lien is a powerful statutory security interest recorded against real property to secure payment for labor, professional services, materials, and equipment furnished for building improvements.

The Preliminary Twenty-Day Lien Notice (A.R.S. § 33-992.01)

To preserve the legal right to record and enforce a mechanic's lien in Arizona, every subcontractor, equipment supplier, and prime contractor must strictly comply with the Preliminary 20-Day Notice requirement:

• Service Window: Must be served within 20 calendar days after the contractor or supplier first furnishes labor, equipment, or materials to the job site.
• Mandatory Recipients: Written notice must be formally served via certified mail (with return receipt) or personal service on: (1) The Property Owner, (2) The Original / Prime Contractor, and (3) The Construction Lender (if any).
• Late Notice Rule: If the notice is served late (e.g., on Day 35), the lien rights are not entirely lost, but they are restricted. A late notice only preserves lien rights for labor and materials furnished within the 20 days immediately preceding the date of service and thereafter. All work performed prior to that 20-day window loses lien protection.
• 30% Cost Increase Rule: A.R.S. § 33-992.01 requires an amended preliminary twenty day notice when the actual estimated total price exceeds by thirty percent or more the total price stated in any prior notice. A notice is not defective merely because the later furnished labor or materials exceed the estimate by less than thirty percent. The amended notice is effective only as to work performed 20 days before the amended notice, or the date the original notice was given, whichever occurs first.
• Owner-Occupied Dwelling Bar (A.R.S. § 33-1002(B)): No mechanic's lien may be recorded against the dwelling of a person who became an owner-occupant before the construction, alteration, repair or improvement, except by a person who executed a written contract directly with that owner-occupant. An HVAC subcontractor on an occupied single-family or two-family home therefore has no lien rights at all, no matter how perfect its 20-day notice; its remedy is the prime contractor's license bond or a breach-of-contract action. Any waiver of § 33-1002 signed by the owner-occupant is void.

Lien Recording & Foreclosure Timeline (A.R.S. § 33-993 & § 33-998)

                                MECHANIC'S LIEN LIFECYCLE
                                            │
   Day 1                  Project Completion       Lien Recorded                 6 Months Post-Recording
     │                            │                     │                                   │
     ├────────────────────────────┼─────────────────────┼───────────────────────────────────┤
     │                            │                     │                                   │
Serve 20-Day                Standard 120-Day      Serve Copy on Owner           Must File Action AND
Preliminary Notice          Recording Window      Within a Reasonable           Record Notice of
(Owner/GC/Lender)           (60d after Notice     Time After Recording          Pendency, or the Lien
                            of Completion)                                      Does Not Continue