Two things decide whether a job in Arizona makes you money: getting the license your work needs, and setting aside the right tax. Arizona licenses its contractors and taxes their profit, so both are worth getting right before you take work on.
Each section below points to a tool that runs your exact numbers for Arizona.
Tax in Arizona
Arizona has a flat 2.5% state income tax on top of your federal taxes. A flat rate makes the math simple: the same percentage applies whatever you earn. You still owe federal income tax and self-employment tax on your profit as well, and you make estimated payments to both the state and the IRS through the year.
On sales tax in Arizona, the state runs a transaction privilege tax (TPT) rather than an ordinary sales tax. Prime contracting is taxed at 5.6% state plus local on your gross receipts, with a 35% standard deduction; maintenance, repair, replacement and alteration jobs are taxed only on the materials at purchase, with your labor exempt. Confirm it for your kind of job before you quote.
Work out what to hold back on the Tax Set-Aside Calculator, which runs the federal and self-employment numbers for Arizona.
Getting paid: liens and retainage
A mechanic's lien is the tool that actually gets a Arizona contractor paid, and in Arizona you generally have to record it within 120 days of completion. There is usually an earlier notice to send first, so do not wait until the filing deadline to start. Miss it and you lose the lien, so the dates matter.
Enforcing it has its own clock. 6 months from recording. Work out your dates on the Lien Deadline tool, and if they are close, get an attorney to confirm them against the statute (A.R.S. §§33-992.01(C), 33-993(A), 33-998).
On money held back as retainage, here is where Arizona lands:
NOT VERIFIED AS A WHOLE ROW. The public-works sections were read and the public cap and its 60-day release each carry their own citation. The private side was not read: A.R.S. §32-1129.01 would not retrieve from here, so every private figure on this row is unchecked. The whole-row stamp is withheld until both sides have been read.
- Private work: No statutory cap on private work in Arizona. Whatever your contract says governs, so read the withholding clause.
- Public work: 10% of each certified and approved monthly progress estimate.
- Release: Public: 60 days from completion, or the filing of a notice of completion, of the contract.
And the step-down is not the same thing as a right. Arizona cuts the rate to 5% when the contract is 50% complete and the contractor is making satisfactory progress. That drop is not automatic: somebody has to make a finding in your favor first, and reaching the milestone on its own entitles you to nothing. Ask in writing and get the finding recorded. 10% is reinstated on any later progress payment if the owner determines progress is not satisfactory.
Heads up: The private-work figures are not verified. Only the public-work sections were read.
Check the Retainage Calculator before you sign a contract that holds back more.
There is no Arizona retainage letter on this site, and the NOT VERIFIED line above is why. A letter that tells the party holding your money what to hand over only gets written over a row that has been read against the statute in full. The Arizona forms below are a different thing: they are the statute's own waiver wording, reproduced, and do not rest on the retainage row.
Free Arizona lien waiver forms
Arizona sets out the wording of a lien waiver in its own statute. These are reproduced from it rather than reworded, because the wording is the part that carries the legal effect. What a signature costs you differs from state to state, and not every state makes a waiver that departs from the form unenforceable, so read the notes on the form itself before you sign one.
- Arizona: Conditional Waiver and Release on Progress Payment, for when someone asks you to sign away a stage payment before the money has cleared
- Arizona: Unconditional Waiver and Release on Progress Payment, for when the stage payment has cleared
- Arizona: Conditional Waiver and Release on Final Payment, for when someone asks you to sign off the last payment before it has cleared
- Arizona: Unconditional Waiver and Release on Final Payment, for when the final payment has cleared
Do you need a license in Arizona?
Arizona requires a state contractor license to take building work on. The threshold that triggers it: $1,000 or more, or any work needing a building permit. Working unlicensed when your job needs a license is the expensive mistake here. Classification caps sit in ADMINISTRATIVE RULE and run the opposite way: B-2 General Small Commercial 2,000,000 or less, C-61/R-61 50,000 or less, R-62 5,000 or less (A.A.C. R4-9-102, R4-9-103). Subsection D removes the small-job exemption entirely for fire-safety work and for connection to natural gas, propane or petroleum gas supply. The license comes from Arizona Registrar of Contractors (ROC). Arizona accepts the NASCLA commercial exam, useful if you work across state lines.
Trade licenses for electrical, plumbing and HVAC are usually separate and often required even where a GC license is not. See what applies to your trade on the Contractor License Checker.
Building codes and permits
Arizona has no single statewide building code, so the edition you build to and whether you need a permit depend on your city or county. Do not assume the town next door adopted the same code or the same amendments.
- Homes: none statewide; each city and county adopts its own edition
- Electrical: none statewide for site-built work; a narrow statewide adoption covers manufactured and factory-built homes only
- Energy: None statewide
- Plumbing: local; the state plumbing code and its commission were repealed
Arizona leaves all four families to cities and counties, and a jurisdiction may adopt nothing at all: Greenlee County neither reviews plans nor inspects. So the honest answer to 'which edition' is your local building department, and there is no state fallback behind it. The only statewide code adoption is the Department of Housing's rule for manufactured and factory-built homes, which does not reach conventional site-built construction.
Source: A.A.C. Title 4 ch. 34 (r. R4-34-102) under A.R.S. Title 41 ch. 37 (manufactured housing); Arizona State Legislature SB 1321 fact sheet (no mandatory statewide energy code); US DOE Building Energy Codes Program state page; A.R.S. Titles 9 and 11 (local adoption authority). We have not yet read this row against Arizona's own adopting authority, so confirm the edition locally before you rely on it.
Check a specific job on the permit tool.
Pay and workers' comp
The minimum wage in Arizona is $15.15 an hour. CPI-indexed; some cities set higher. That is the floor for anyone you put on the books, and it is worth confirming against the state labor department each year because several states step their rate mid-year. Check a rate on the minimum-wage tool.
On workers' comp, the rule that catches people out in Arizona is who has to be covered. Sole proprietors are exempt; corporate officers can elect to exclude themselves. Get a premium range for your trade on the Workers' Comp Estimator.
If a client will not pay
If a client will not pay, you can sue for up to $5,000 in Arizona's Justice Court, Small Claims Division and lawyers are restricted, so it stays fairly informal. That covers most unpaid-invoice disputes for a small outfit; a bigger claim goes to regular civil court where you will probably want an attorney. Walk through whether filing is worth it on the Small Claims checker.
The clock runs the other way too: a client generally has 6 years to sue you over the work under a written contract in Arizona, with an absolute cutoff 8 years after the job is substantially complete. Work out your exposure on the Warranty & Claim Deadline tool.
Common questions
How much state income tax will I pay in Arizona?
Arizona has a flat 2.5% state income tax on your profit, on top of federal income tax and self-employment tax. Use the Tax Set-Aside Calculator to see what to hold back.
Do I need a contractor's license in Arizona?
Yes. Arizona requires a state contractor license. The threshold: $1,000 or more, or any work needing a building permit. It is issued by Arizona Registrar of Contractors (ROC).
What is the small claims limit in Arizona?
You can sue for up to $5,000 in Arizona's Justice Court, Small Claims Division. The filing fee is typically $35. Larger claims go to regular civil court.
How long do I have to file a mechanic's lien in Arizona?
Generally 120 days from completion, and there is usually an earlier notice to send first. Miss it and you lose the lien. Work your own dates out on the Lien Deadline tool.
Are there free Arizona contract and payment forms?
Yes. This page links 4 lien waiver forms reproduced from the Arizona statute rather than reworded. They are free, there is no sign-up, and you fill one in on screen and download it as a PDF or a Word file.
What is the minimum wage in Arizona?
$15.15 an hour in Arizona, above the federal $7.25. Several states step their rate mid-year, so confirm it before you set a payroll.
What building code does Arizona use?
There is no single statewide building code in Arizona: the edition, and whether you need a permit at all, are set by your city or county. Homes: none statewide; each city and county adopts its own edition. Do not assume the next town over adopted the same thing.
The honest bit
These are the 2026 rules for Arizona as they stood when this guide was written, and they change: legislatures move thresholds, deadlines and rates every year. Treat this as general guidance to point you in the right direction, not legal, tax or financial advice. Verify anything you rely on at the source (the IRS, the Arizona tax and licensing agencies, and your local building department) or with a professional. Where Arizona does something unusual, the detail is called out above rather than glossed over.
Related: Tax Set-Aside Calculator · Mechanic's Lien Deadline · Contractor License Checker · Small Claims checker · Working in Your State
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Sources
- Arizona contractor licensing authority · Arizona contractor licensing authority. Who must hold a contractor or trade license in Arizona, and the licensing instrument (https://www.nascla.org/commercial-exam-participating-state-agencies/arizona-registrar-contractors-0)
- Arizona Legislature · Mechanics lien notice, filing and enforcement deadlines in Arizona: A.R.S. §§33-992.01(C), 33-993(A), 33-998. Verified against this authority on 2026-08-09.
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