Arizona Preliminary 20-Day Notice Deadline Calculator

    Every party working on a private Arizona construction project — including general contractors, subcontractors, suppliers, and equipment lessors — must serve a preliminary 20-day notice within 20 calendar days of first furnishing labor or materials, per A.R.S. § 33-992.01. Arizona is unique among states requiring ALL parties to file — there is no general contractor exemption like Florida and California provide. Arizona applies a partial-loss rule: late filing still preserves lien rights for work performed in the 20 days before service date plus all future work. Enter your first furnishing date below to see your deadline and exactly how much of your work is currently protected.

    Arizona Difference: ALL Parties Must File

    Unlike Florida and California where general contractors with direct owner contracts are exempt from preliminary notices, Arizona requires every claimant to serve the 20-day notice — including general contractors. Per A.R.S. § 33-992.01(B), failure to file forfeits mechanics lien rights regardless of who you contracted with.

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    How the Arizona 20-Day Deadline Works

    A.R.S. § 33-992.01 requires every claimant to serve a preliminary 20-day notice within 20 calendar days of first furnishing labor, professional services, materials, machinery, fixtures, or tools to the project. The clock starts on the day of first physical furnishing — not contract signing, not bidding, not first invoice.

    Arizona counts calendar days, not business days. Weekends, holidays, and weather days all count. If Day 20 falls on a Sunday, the deadline is still that Sunday — Arizona courts do NOT extend statutory deadlines to the next business day.

    Notice must be served on all required parties: the owner, the original contractor (if the claimant is not the original contractor), the construction lender (if any), and the person with whom the claimant has contracted. Per A.R.S. § 33-992.02, valid service methods are certified mail with return receipt, registered mail with return receipt, or hand delivery only. Email, fax, and first-class mail are NOT valid service methods under Arizona law.

    Who Must File an Arizona Preliminary Notice

    Arizona's preliminary notice statute is broader than most states. Per A.R.S. § 33-992.01(B), the following parties must serve the 20-day notice:

    • General contractors — including those with direct owner contracts (this is the Arizona difference)
    • Subcontractors who contract with a general contractor
    • Sub-subcontractors who contract with subcontractors
    • Material suppliers who furnish materials to anyone on the project
    • Equipment lessors who lease equipment to any project participant
    • Anyone furnishing professional services, machinery, fixtures, or tools

    The only exception is for claimants on owner-occupied residential dwellings where the owner personally contracts with the claimant — and even this exception has narrow limits. When in doubt, file the notice. The cost of filing is dramatically less than the cost of losing lien rights on a disputed payment.

    The Arizona Partial-Loss Rule

    Arizona applies a partial-loss rule similar to California's § 8204(a). Late preliminary notice does not eliminate all lien rights — it shifts them. Filing late preserves lien rights for:

    • All work performed in the 20 days IMMEDIATELY BEFORE the date the notice is served
    • All work performed AFTER the notice is served

    What you lose: lien rights for work performed MORE than 20 days before the service date.

    Concrete example: An Arizona subcontractor starts work March 1 on a project running through June 30. They serve the preliminary notice on March 30 (Day 30, 10 days late). Under A.R.S. § 33-992.01, they lose lien rights for work performed March 1–10 (Days 1–10). They preserve lien rights for work performed March 11–30 (the 20 days before service) plus all work from March 31 through June 30. On a $60,000 subcontract, they might lose protection on $10,000 of early work but preserve protection on $50,000 of remaining work.

    Practical guidance: If you realize you're past Day 20, file the same day or the next business day. Every day of delay shifts another day of work into the unprotected window. Slow payments cost the U.S. construction industry an estimated $280 billion in 2024, according to Rabbet's 2024 Construction Payments Report. Preserving as much lien leverage as possible is the most important step for collecting what you're owed.

    Related Arizona Lien Statutes

    Frequently Asked Questions

    What is the Arizona Preliminary 20-Day Notice deadline?

    All parties working on a private construction project in Arizona must serve a preliminary 20-day notice within 20 calendar days of first furnishing labor, professional services, materials, machinery, fixtures, or tools, per A.R.S. § 33-992.01. Arizona is unique in requiring ALL parties to file — including general contractors with direct owner contracts.

    Do general contractors really have to file in Arizona?

    Yes. Unlike Florida and California where GCs with direct owner contracts are exempt, A.R.S. § 33-992.01(B) requires every claimant — including general contractors, subcontractors, suppliers, equipment lessors, and laborers — to serve the preliminary notice. Failure to file forfeits mechanics lien rights regardless of contract privity with the owner.

    Who else must receive the Arizona preliminary notice?

    Per A.R.S. § 33-992.01, the notice must be served on the owner, the original contractor (if the claimant is not the original contractor), the construction lender (if any), and the person with whom the claimant has contracted. All required recipients must receive the notice for the claimant to preserve full lien rights.

    What happens if you file the Arizona notice late?

    Arizona applies a partial-loss rule similar to California: late filing still preserves lien rights for work performed in the 20 days before service date plus all work going forward. You lose lien rights only for work performed MORE than 20 days before the service date. Filing today always protects more contract value than not filing at all.

    How must the Arizona preliminary notice be served?

    Per A.R.S. § 33-992.02, service must be by certified or registered mail with return receipt requested, OR by hand delivery. First-class mail, email, fax, and overnight courier are NOT valid service methods under Arizona law. LienFlash uses USPS Certified Mail with Return Receipt as standard practice.

    When does the 20-day clock start in Arizona?

    The clock starts on the day you first furnish labor, professional services, materials, machinery, fixtures, or tools to the project — not the day you signed the contract, not the day you bid the job, not the day you sent the first invoice. The first physical day of furnishing on site is Day 1.

    Does Arizona count business days or calendar days?

    Calendar days. Weekends, holidays, and weather days all count toward the 20-day window. If Day 20 falls on a Sunday, the deadline is still that Sunday — Arizona courts do not extend statutory deadlines to the next business day.

    How much does it cost to send an Arizona preliminary notice with LienFlash?

    A single Arizona preliminary 20-day notice through LienFlash costs $24.99 and includes attorney-reviewed A.R.S. § 33-992.01-compliant form generation, USPS Certified Mail with Return Receipt to all required parties (owner, GC, lender, contracting party), and a Certificate of Mailing PDF as proof of service.

    Related Resources

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