Arizona does tax 401(k) withdrawals from traditional accounts, treating them as ordinary income at a flat 2.5% rate. Qualified withdrawals from a Roth 401(k) are not taxed by Arizona at all. There is no special state subtraction for private-sector 401(k) distributions, so for most retirees the full taxable amount that appears on the federal return flows through to the Arizona return.
How the 2.5% Rate Gets Applied
Arizona starts its calculation from your federal adjusted gross income.1Arizona Legislature. Arizona Code 43-1001 – Definitions A traditional 401(k) distribution is ordinary income on your federal return, so it lands in your Arizona gross income automatically. From there, Arizona lets you subtract certain retirement income (covered below) and the standard deduction, then applies a single 2.5% rate to what remains.2Arizona Legislature. Arizona State Senate Fact Sheet for S.B. 1828 The flat rate replaced the state’s graduated brackets starting with the 2023 tax year.
The standard deduction is adjusted each year for inflation, and Arizona lets you increase it by a percentage of the charitable contributions you would have claimed if you itemized. For a retiree whose only income is a modest 401(k) draw plus Social Security, those deductions can shrink the taxable portion substantially before the 2.5% is even applied.
Roth 401(k) Withdrawals Are Not Taxed
Qualified Roth 401(k) distributions are tax-free federally, which means they never appear in your federal AGI and never enter Arizona’s tax calculation.3Internal Revenue Service. Retirement Topics – Designated Roth Account A distribution qualifies when the account has been open at least five years and you are 59½ or older.
If you pull earnings from a Roth 401(k) before meeting those requirements, the earnings portion is taxable federally and Arizona picks it up the same way. Your original after-tax contributions still come out untaxed regardless of timing.
Is There an Exemption for Private 401(k) Income?
No. Arizona’s retirement-income subtractions are narrow, and a private employer’s 401(k) is not on the list. Here is what the state does exempt or reduce:
- Social Security and railroad retirement benefits included in your federal AGI are fully subtracted, making them exempt from Arizona tax.4Arizona Legislature. Arizona Code 43-1022 – Subtractions from Arizona Gross Income
- Uniformed services retired or retainer pay is fully subtracted for tax years beginning after December 31, 2020, with no dollar cap.4Arizona Legislature. Arizona Code 43-1022 – Subtractions from Arizona Gross Income
- Benefits, annuities, and pensions from qualifying federal, Arizona state, and Arizona local government retirement systems are subtracted up to a combined $2,500.4Arizona Legislature. Arizona Code 43-1022 – Subtractions from Arizona Gross Income
If your 401(k) came through a private employer, none of these apply. The full taxable distribution is subject to the 2.5% flat rate.
A Pending Bill That Could Change This for Older Retirees
S.B. 1371, introduced in Arizona’s 57th Legislature, would create a subtraction for distributions from any retirement account — including 401(k), 403(b), 457, and traditional IRA plans — for taxpayers who are at least 67 years old. The subtraction would be capped at the Arizona standard deduction for the taxpayer’s filing status.5Arizona Legislature. SB1371 – House Bill Summary The bill text applies to tax years beginning after December 31, 2024.6Arizona Legislature. Senate Bill 1371 – Bill Text If enacted, it would be the first Arizona subtraction covering private-sector 401(k) withdrawals. Confirm the bill’s status with the Arizona Department of Revenue before relying on it.
Early Withdrawals Before Age 59½
Federal law adds a 10% penalty on 401(k) withdrawals taken before age 59½, unless an exception applies.7Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions Arizona does not add its own early-withdrawal penalty. The distribution is taxed at the same 2.5% flat rate that applies to any other income. On a $50,000 early withdrawal, Arizona would collect $1,250 or less after deductions, on top of whatever federal tax and penalty applies.
Required Minimum Distributions
At age 73, federal law requires annual distributions from traditional 401(k) accounts and most other tax-deferred plans.8Internal Revenue Service. Retirement Topics – Required Minimum Distributions (RMDs) These RMDs land in your federal AGI, and Arizona taxes them at 2.5%. Skipping the RMD carries a 25% federal penalty on the amount you should have withdrawn, so avoiding the Arizona tax by not taking the distribution is not a viable strategy. Roth 401(k) balances still inside an employer plan are also subject to RMDs; rolling them to a Roth IRA before 73 removes that requirement.
Rollovers Do Not Trigger Tax
Moving money directly from a 401(k) into an IRA or another qualified plan is not a taxable event federally or in Arizona. A direct rollover never enters your federal AGI, so there is nothing for Arizona to tax. The key is that the funds move custodian-to-custodian; a check written to you starts a 60-day clock and 20% federal withholding, and missing the redeposit converts the amount into a taxable distribution.
Setting Up Arizona Withholding on Your Distributions
Arizona does not automatically withhold state tax from 401(k) payments. You can request voluntary withholding by filing Form A-4P with the plan administrator or the payer of your distribution.9Arizona Department of Revenue. Request for Arizona Voluntary Income Tax Withholding on Retirement Income You pick a percentage between 0.5% and 3.5%, and you can add a flat dollar amount per distribution if you want. Choosing 2.5% mirrors the flat tax rate, though your actual bill may come in lower once deductions apply. The form goes to your plan administrator, not to the state, and stays in effect until you file a new one. Withholding cannot be applied to Roth distributions that are excluded from Arizona gross income.
When Estimated Payments Are Required
If your Arizona gross income tops $75,000 (or $150,000 filing jointly) in both the current and prior year, Arizona requires quarterly estimated payments.10Arizona Legislature. Arizona Code 43-581 – Payment of Estimated Tax This trips up retirees who take large 401(k) distributions without any employer paycheck feeding withholding. To avoid an underpayment penalty, your combined withholding and estimates must equal at least 90% of the current year’s tax or 100% of the prior year’s. No penalty applies if your total liability after withholding and credits is under $1,000. For many retirees, setting up voluntary withholding on the 401(k) itself is simpler than tracking quarterly deadlines.
Who Actually Owes Arizona Tax
Your residency status decides the reach of Arizona’s tax on your 401(k). Full-year Arizona residents owe state tax on every 401(k) distribution received during the year, regardless of where they earned the money or where the plan is administered.11Arizona Department of Revenue. Individual Income Tax Information A retiree who worked 30 years in Ohio and now lives in Phoenix pays Arizona tax on every dollar pulled from that former employer’s plan.
Part-year residents owe Arizona tax only on distributions received after they became residents. A March withdrawal taken from another state, followed by a July move to Arizona, stays outside Arizona’s tax base for that year.11Arizona Department of Revenue. Individual Income Tax Information
Nonresidents generally owe no Arizona tax on 401(k) distributions. Retirement plan payments are sourced to the recipient’s state of residence, not the state where the plan was established,12Arizona Legislature. Arizona Code 43-1091 – Gross Income of a Nonresident and federal law bars states from taxing the retirement income of former residents who have moved elsewhere.