Arizona Tax Law

What Is Tax Law in Arizona?

Tax practice in Arizona operates on a two-track structure: federal tax matters route through the IRS and the US Tax Court, while state matters route through the Arizona Department of Revenue (ADOR) and the Arizona Tax Court under ARS § 12-161. Arizona has a flat 2.5% state income tax (effective 2023) — one of the lowest in the country. Arizona has NO state estate tax (federal estate tax exemption $13.61M, 2024).

The state's Transaction Privilege Tax (TPT) — Arizona's quasi-sales tax — operates with multiple business classifications and is administered by ADOR with city-level overlay. TPT classification disputes (which business activity bucket applies) are a high-volume practice area. Property tax appeals follow specific calendar rules with deadlines tied to county assessor valuation notices.

When Do You Need a Tax Attorney?

Common tax matters requiring counsel: IRS audits (correspondence, office, or field), tax fraud defense (criminal charges under 26 USC § 7201 evasion, § 7206 false return, § 7203 failure to file), collection defense (liens, levies, wage garnishments), estate and gift tax planning, TPT classification disputes with ADOR, property tax appeals through county boards of equalization and Arizona Tax Court, and tax litigation.

The US Tax Court allows litigation without prepayment (unlike District Court refund actions, which require pay-then-sue). Arizona Tax Court handles state-level disputes with broad discovery and jury trial available. Offers in compromise are available for AZ taxes under ARS § 42-1004. Voluntary disclosure programs can reduce penalties for taxpayers coming forward proactively.

Arizona Tax Law Sub-Specialties

Tax Law covers several distinct case types in Arizona, each with its own statutory framework and procedural rules. Below are the most common sub-specialties — with the Arizona-specific provisions that distinguish them.

🏛 IRS Audit Representation

IRS audits in Arizona route through the appropriate IRS regional office. Three audit types: correspondence audit (most common, mail-based), office audit (taxpayer visits IRS office), and field audit (IRS agent visits home/business — most serious). Representation: Form 2848 Power of Attorney allows enrolled agents, CPAs, or attorneys to handle audit. Statute of limitations: 3 years from filing for most audits; 6 years for substantial understatement (25%+); unlimited for fraud or failure to file. Audit reconsideration available even after assessment if new evidence emerges. Appeals process: 30-day letter → IRS Appeals Office → 90-day letter → US Tax Court (no payment required to litigate) or pay-and-sue in District Court.

🚔 Tax Fraud Defense (Criminal)

Criminal tax cases are prosecuted by the US Department of Justice Tax Division and US Attorney's offices. Common charges: tax evasion (26 USC § 7201, felony, up to 5 years), filing false return (§ 7206(1), felony, up to 3 years), failure to file (§ 7203, misdemeanor, up to 1 year), willful failure to pay, and conspiracy (18 USC § 371). Criminal investigations originate from IRS Criminal Investigation Division (CID) — different agents than civil examiners. Two-track risk: parallel civil and criminal proceedings can occur. Fifth Amendment rights apply but selective invocation can be inferred negatively in civil cases. Voluntary disclosure programs may reduce criminal exposure for taxpayers who come forward before investigation begins.

⚖ Tax Litigation (US Tax Court & AZ Tax Court)

US Tax Court is the primary federal forum — no payment required to litigate (unlike District Court refund suits, which require pay-then-sue). Tax Court has nationwide jurisdiction with judges traveling to Arizona for hearings. Arizona Tax Court (ARS § 12-161) is a state-level court handling state tax disputes — property tax appeals, TPT disputes, income tax, and corporate tax. Arizona Tax Court has limited jurisdiction; most disputes start with Arizona Department of Revenue (ADOR) protest, then appeal to State Board of Tax Appeals, then Tax Court. Property tax appeals follow specific calendar (annual valuation notices, 60-day protest window). Refund claims: 4-year SOL for AZ income tax overpayments.

📊 Tax Planning & Compliance

Tax planning in Arizona covers income tax, estate/gift tax, sales and use tax (TPT), property tax, and employment tax. Arizona has a flat 2.5% state income tax (effective 2023). Federal estate tax exemption is $13.61M (2024) — most Arizona estates don't owe federal estate tax; Arizona has NO state estate tax. Transaction Privilege Tax (TPT): Arizona's quasi-sales tax (technically a tax on the privilege of doing business). Multiple business classifications with different rates. Property tax: assessed at limited property value based on county assessor valuation; rates vary by jurisdiction. Small business AZ pass-through entity (PTE) tax election available since 2022 — workaround for federal SALT cap.

📋 State Tax Disputes (ADOR)

Arizona Department of Revenue handles state tax matters including individual income tax, corporate income tax, Transaction Privilege Tax (TPT), withholding, and property tax administration. Dispute process: ADOR issues notice → 90-day protest window → administrative review → State Board of Tax Appeals → Arizona Tax Court → Arizona Court of Appeals. Common disputes: TPT classification (which business activity bucket applies), residency for income tax (Arizona aggressive on residency claims for snowbirds), nexus determinations for out-of-state sellers, sourcing of multistate income, and use tax assessments. Offers in compromise available for AZ taxes under ARS § 42-1004. Voluntary disclosure programs can reduce penalties for taxpayers coming forward proactively.

Costs and Timeline

$250-$500/hour. Audit representation: $3,000-$10,000+. Offer in compromise: $3,000-$7,000+.

Arizona Laws and Statutes

A.R.S. Title 42. A.R.S. § 42-1101 (income tax), § 42-5001 (Transaction Privilege Tax). Federal: IRC Title 26.

Tax Law Attorneys by County

Pre-screened tax law attorneys serving each Arizona county. Counts reflect Standard-tier attorneys with active bar status. Counties with active listings show featured attorneys; counties without local listings link to our statewide directory.

Other Arizona Counties

Tax Law attorney coverage is still being built out in these counties. Click any county to browse our statewide pool.

Featured Tax Law Attorneys

Pre-screened tax law attorneys serving Arizona. Browse profiles to find the right attorney for your case.

Arizona Tax Law Guides & Resources

Free guides covering key topics in Arizona tax law. Learn the basics before you hire an attorney.

Common Questions About Arizona Tax Law