Running a trade business in Arizona: the ROC, 20-day notices and TPT

Arizona routes almost everything through one agency, the Registrar of Contractors, and taxes construction through a system found nowhere else. Both are manageable once mapped. The 2026 essentials:

ROC licensing above $1,000

Any construction work over $1,000 (labor and materials, including the handyman's whole job, not per task) or requiring a building permit needs an ROC license. Licenses split into residential, commercial and dual classes across dozens of classifications (electrical, plumbing, HVAC, general building among them), with trade exams, experience verification, bonding scaled to volume, and background checks. Unlicensed contracting is a misdemeanor the ROC actively stings for, and, as elsewhere, unlicensed contracts are unenforceable.

Liens: California-style notices, longer fuse

Arizona borrowed the 20-day preliminary notice: serve it within 20 days of first furnishing (late service reaches back only 20 days). The lien must then be recorded within 120 days of completion, shortened to 60 days if a notice of completion is recorded, with suit within six months. Owner-occupied dwellings are largely lien-proof unless you contracted directly with the owner, a major residential caveat.

TPT: Arizona's different tax animal

Arizona has no conventional sales tax on contracting; it has the Transaction Privilege Tax. Prime contractors on new construction and modification work pay TPT on 65% of gross receipts, while maintenance, repair, replacement and alteration (MRRA) jobs are instead taxed at retail on the materials. Classifying each job as modification or MRRA decides who owes what, and the Department of Revenue publishes matrices because everyone finds it confusing. Get your invoicing categories right once and reuse them.

Workers comp and OSHA

Workers compensation is mandatory from the first employee, and safety is run by ADOSH, Arizona's state OSHA plan, which mirrors federal standards with local enforcement and heat stress emphasis programs that matter in a state where summer sites hit 115°F.

Arizona FAQs for trade businesses

Is there really no handyman exemption above $1,000?

Correct. Over $1,000 total, or any job needing a permit, requires an ROC license, and the ROC runs sting operations. The exemption also cannot be stacked by splitting one job into pieces.

Why can’t I lien an owner-occupied house?

Arizona protects owner-occupants: without a contract directly with the owner, subs and suppliers generally cannot lien an owner-occupied dwelling, so on residential work your protection is contract terms and progress payments.

Modification or MRRA, and why does it decide my tax?

Ground-up and structural modification work is taxed under prime contracting TPT on 65% of gross receipts; maintenance, repair, replacement and alteration jobs are instead taxed at retail on materials. The classification drives who owes what, so decide it at quote time.

This guide is general information, not legal advice. Licensing thresholds, lien statutes and tax rules change; always confirm current requirements with the licensing board, an attorney or your accountant before relying on them.