Moving to Arizona

Arizona taxes residents on everything, nonresidents on what they earn in Arizona, and in the year you move you are both. A resident is anyone domiciled here, or anyone here for other than a temporary or transitory purpose, and anyone who spends more than nine months of the year in Arizona is presumed to be a resident unless they prove otherwise. The move-year return is Form 140PY, which reports all income received while a resident plus Arizona-source income from the rest of the year, and prorates the standard deduction and the dependent credit by the share of federal AGI that is Arizona’s. The rate is the same 2.5% everyone pays. Arizona has no true reciprocity with any state, but it has a reverse arrangement with California, Indiana, Oregon and Virginia: their residents who work in Arizona file an Arizona nonresident return and take the credit for their home state’s tax here, rather than at home. Residents of every other state, and Arizona residents working anywhere, use the ordinary rule: file where the income was earned, file at home, and take the credit at home. Nonresidents who work in Arizona fewer than 60 days in a year are exempt from Arizona withholding, and Arizona has no convenience-of-the-employer rule, so a remote worker is taxed by Arizona only on work physically done in Arizona.

Who is a resident

The statute, A.R.S. 43-104, makes two kinds of people residents: anyone domiciled in Arizona, even while temporarily away, and anyone in Arizona for other than a temporary or transitory purpose, even if domiciled elsewhere. Domicile is the place you consider your true, fixed, permanent home, the one you intend to return to. You can have only one, it continues until you establish another, and the burden of proving a change is on the person claiming it. The Department’s procedure on residency, ITP 92-1, lists the facts it weighs: where you, your spouse and your children physically live; where your cars are registered and your driver’s license issued; where you vote; where your bank accounts and business connections are; whether you bought or sold a home; where you pay property and income taxes; and whether you have consistently used a new permanent address. No one fact controls.

The nine-month rule is a presumption, not a definition. Spend more than nine months of the year in Arizona and you are presumed a resident; you can overcome it with evidence that the stay was temporary or transitory, but the Department starts from the assumption that it was not. Spend less than nine months and you may still be a resident if your domicile is here or your purpose for being here is indefinite. Winter visitors who keep their home, their license and their voting registration elsewhere and leave in April are nonresidents; a visitor who sells the northern home and stays is a resident from the day the intent changed, whatever the day count.

Military members keep the domicile they had when they enlisted, so a service member stationed at Luke or Fort Huachuca from another state is not an Arizona resident, and an Arizona resident stationed elsewhere remains one, with active-duty pay subtracted either way. Military spouses may elect the service member’s domicile and are exempt from Arizona withholding on Form WEC.

The part-year return

Form 140PY has two columns. The federal column carries the full-year amounts from Form 1040; the Arizona column carries income received while a resident plus Arizona-source income received while a nonresident. Wages go by when they were earned, interest and dividends by when they were paid, a pension or IRA distribution by the date of each payment, and a capital gain by the date of sale. The Arizona column total is Arizona gross income; divided by federal AGI it gives the Arizona income ratio, rounded to three places and never more than 1.000. That ratio prorates the standard deduction and the dependent tax credit, so a family that moved in on July 1 and earned 54% of its income here gets 54% of the $32,200 joint deduction and 54% of the $125 per child. The exemptions for age and blindness are prorated the same way.

Subtractions follow the same split. Social Security is subtracted whether received before or after the move. Tips and overtime may be subtracted only to the extent they are in Arizona gross income, which for a mover means the tips and overtime earned after arrival; the senior deduction subtraction follows the Arizona income ratio (verify). The 25% capital gain subtraction applies to post-2011 assets sold while a resident, and to Arizona-source gains sold while a nonresident. The gift credits (Forms 321, 322, 323, 348 and 352) are not prorated; a part-year resident may claim the full amounts against Arizona tax.

If you moved out and had no Arizona-source income afterward, the Arizona column stops at the move date and that is the whole return. If you moved in and sold the former home before arriving, the gain was received while a nonresident from a non-Arizona source and is not Arizona income; if you sold it after arriving, it is, though the federal exclusion of up to $250,000 or $500,000 removes most or all of it from AGI first. See The home sale exclusion.

The four reverse-credit states

Most states handle cross-border wages one way: you file a nonresident return where you work, a resident return where you live, and your home state gives you a credit for the tax paid where you work. Arizona does that with everyone except California, Indiana, Oregon and Virginia. With those four the credit runs backwards. A California resident who works in Arizona files Arizona Form 140NR, pays California on the same wages, and claims the credit for the California tax on Arizona Form 309, in Arizona. The employee can also stop Arizona withholding by giving the employer Form WEC. Going the other direction, an Arizona resident who works in California, Oregon or Virginia files a nonresident return there, pays Arizona as a resident, and claims the credit on the other state’s nonresident return rather than on Form 309; Indiana follows the same pattern for its residents working here, and an Arizona resident working in Indiana should check which return carries the credit. None of this is reciprocity. Both states still tax the wages and both returns are still filed; only the location of the credit changes.

For every other state the Arizona resident claims Form 309 on the Arizona return. The credit is the smaller of the other state’s tax on the doubly taxed income or the Arizona tax on it, computed by proration, and it is applied after Arizona’s other nonrefundable credits, cannot exceed the Arizona tax, and cannot be carried forward. Only net income taxes count: not city taxes, not withholding as such, not the other state’s penalties or interest. A copy of the other state’s return goes with Form 309. A resident of a no-income-tax state who works in Arizona files Form 140NR and has no credit to take anywhere; the Arizona tax is simply owed.

Remote work across the line

Arizona taxes nonresidents on income from Arizona sources, and for wages that means work physically performed in Arizona. There is no convenience-of-the-employer rule. A Nevada resident who works from home for a Phoenix company owes Arizona nothing on those wages and should give the employer a Form A-4 electing zero Arizona withholding; a Phoenix resident who works from home for a California company owes Arizona on everything, as a resident, and owes California nothing on the days worked at home in Arizona (verify). Days spent working in the office in the other state are that state’s to tax, so keep a calendar.

A nonresident who comes into Arizona to work fewer than 60 days in a year is exempt from Arizona withholding, provided the employer has property, payroll and sales in Arizona. The exemption is from withholding, not from tax; if the Arizona-source wages exceed the filing threshold, a 140NR is still due.

What the former state will look at

A move from a high-tax state to Arizona draws attention from the state left behind, and the audit is of the move, not of the Arizona return. The former state will want the date the Arizona home was occupied, the date the old home was sold or leased, the license and registration dates, where you voted next, where your doctors and advisers are, where the children attend school, and the location of anything you call home. If you keep the old house, it will also count days, and Arizona’s nine-month presumption does not protect you from the other state’s test. The clean move is the one where the facts all point the same way in the same month.

The year you move: a checklist

• Pick the date. Residency begins the day you arrive with the intent to stay. Write it down, and let the closing date, the lease, the license and the registration cluster around it.
• Get the Arizona driver’s license and register the vehicles. Register to vote.
• File Form A-4 with the new employer. The default 2.0% is often too low for a two-earner household; 2.5% is the safe pick.
• If you move in from California, Indiana, Oregon or Virginia and keep working for an employer there, or move out to one of them and keep working here, sort out which return carries the credit before the first payroll.
• Tell your pension payer and IRA custodian. Arizona withholding goes on Form A-4P; the former state’s withholding should stop, since it can no longer tax the pension.
• Keep a calendar of days in each state.
• If you are 65 or older and bought a home, calendar the Senior Freeze: two years of residence in the home are required before the county assessor will take the application, and the deadline is September 1.
• Make the gift credits work for you in the move year. They are not prorated, and gifts through April 15, 2027 count for 2026.
• Check the estimated payment rule. If Arizona gross income exceeds $75,000 single or $150,000 joint this year and next, Arizona expects quarterly payments from the second year on.
• File two part-year returns, one for each state, and keep both with the federal return.