Arizona's treatment of military retirement pay changed materially in 2021. Before then, the state allowed a subtraction of only $3,500 of military retired pay per year, taxing the rest at Arizona's regular rates. Starting with tax year 2021, Arizona moved to a full 100% subtraction, meaning military retired or retainer pay is entirely removed from Arizona taxable income regardless of the amount received. A retiree drawing $60,000 a year in military retirement pay pays Arizona income tax on none of it.

The exemption is claimed as a subtraction on the Arizona return, meaning the income is still reported as it flows through from the federal return, then subtracted back out before Arizona tax is calculated. This matters because Arizona's tax software and forms need the subtraction actively claimed, it doesn't happen automatically just because the income is military-sourced; a preparer unfamiliar with the 2021 change can still apply the old, smaller subtraction by mistake.

This treatment only covers military retired or retainer pay, meaning the pension-like payments a service member receives after a qualifying retirement, generally 20 years of service or a medical retirement. It does not extend to active-duty basic pay, to a Thrift Savings Plan withdrawal, or to Social Security. VA disability compensation is a separate category and is already fully exempt from both federal and Arizona tax, so it isn't affected by this rule one way or the other, it was never taxed to begin with.

For a household with a military retiree and a second income source, a civilian pension, a 401(k), Social Security, each piece of income needs to be evaluated on its own terms. The military retired pay is fully exempt. Social Security is not taxed at all in Arizona for anyone, veteran or not. A civilian pension or 401(k)/IRA withdrawal is generally taxed at Arizona's flat 2.5% rate along with all other ordinary income.

Arizona's exemption puts it in the same category as roughly two dozen other states that have moved to fully exempt military retirement pay over the past decade, a substantial shift from a decade ago when only a handful of states offered full exemptions. For a retiring service member choosing among Southwest states, Arizona, Nevada (no income tax on anything), and New Mexico (military retirement also fully exempt) all remove state tax from military retired pay entirely; the practical difference between those three then comes down to how each treats the rest of the household's income.

If you're a military retiree who moved to Arizona sometime after 2021, or has been filing here since before the change, and suspects an earlier return understated the subtraction, generally used an older software template or a preparer's default still reflecting the pre-2021 $3,500 cap, Arizona allows amended returns for several prior years to correct the error and claim a refund of any overpaid tax. This is worth an active check of the last few years' returns rather than an assumption that everything was filed correctly the first time, particularly for retirees who changed preparers or software provider sometime in the last several years.

It's also worth distinguishing this exemption clearly from Arizona's separate, broader property tax exemption programs available to some disabled veterans, which are administered at the county level and governed by entirely different eligibility rules than the income tax subtraction discussed here. A veteran can qualify for one, both, or neither depending on disability rating and county-specific criteria, and conflating the two is a common source of confusion when researching Arizona's veteran-related tax benefits online.

If you're a military retiree in Arizona, or considering a move here, confirm your tax preparer or software is applying the full 100% subtraction, not an outdated $3,500 figure that some online calculators and guides still reference. This is a common enough error that it's worth checking your own return line by line the first year you claim it.

If military retired pay is the household's primary income source, Arizona's overall tax burden in retirement can end up quite low, no state tax on the military pension, no state tax on Social Security, and a flat 2.5% rate on whatever else there is. Run the actual numbers against Nevada (zero income tax on everything) and New Mexico (military pay also exempt, but other income taxed at graduated rates up to 5.9%) before assuming Arizona is automatically the cheapest option; it usually is for this specific profile, but it's worth confirming against your full income picture.

• Assuming only $3,500 of military retirement pay is exempt. That was the rule before 2021; the current rule is a full 100% subtraction with no cap.
• Not actively claiming the subtraction on the Arizona return, since it doesn't apply automatically just because the income is military-sourced.
• Confusing the military retired pay exemption with VA disability compensation, which was already fully tax-exempt at both the federal and state level and isn't affected by this rule.
• Assuming all other retirement income, a civilian pension, a 401(k) withdrawal, gets the same exemption. It doesn't; only military retired or retainer pay qualifies.