Social Security is not taxable in Arizona at the state level. Arizona Revised Statutes 43-1022 lets you subtract every dollar of Social Security retirement, survivor, and disability benefits that appears in your federal adjusted gross income, with no income cap and no phase-out.1Arizona Legislature. Arizona Revised Statutes 43-1022 – Subtractions From Arizona Gross Income The federal government can still tax a portion of your benefits, and because Arizona builds its return on top of your federal numbers, the state exemption only works if you actively claim the subtraction on your Arizona return.
Claiming the Subtraction on Your Arizona Return
Arizona starts its income tax calculation with your federal adjusted gross income, which already includes any federally taxable Social Security. The state offsets that with a line-item subtraction authorized by ARS 43-1022, paragraph 10, which points to the amount of benefits included under Internal Revenue Code Section 86.1Arizona Legislature. Arizona Revised Statutes 43-1022 – Subtractions From Arizona Gross Income
In practice, you take the exact dollar figure from Line 6b of your federal Form 1040 or 1040-SR and enter it as a subtraction on Arizona Form 140. Whether that number is $3,000 or $30,000, the entire amount comes out of your Arizona gross income.2Legal Information Institute. Arizona Admin Code R15-2C-305 – Social Security and Railroad Retirement Benefits Filing software handles this automatically in most cases. If you prepare your return by hand or use a preparer unfamiliar with Arizona, skipping this line means paying state tax on income the legislature has already exempted.
How Much of Your Benefit Is Federally Taxable
The state subtraction only matters to the extent that some of your Social Security is federally taxable in the first place. The IRS calculates that using “provisional income,” which is your adjusted gross income plus tax-exempt interest plus half of your Social Security benefits for the year.3Internal Revenue Service. Publication 915 – Social Security and Equivalent Railroad Retirement Benefits That figure determines whether 0%, up to 50%, or up to 85% of your benefits land on Line 6b.
For single, head of household, or qualifying surviving spouse filers:
- Below $25,000: none of your Social Security is federally taxable.
- $25,000 to $34,000: up to 50% may be taxable.
- Above $34,000: up to 85% may be taxable.
For married filing jointly:
- Below $32,000: none of your Social Security is federally taxable.
- $32,000 to $44,000: up to 50% may be taxable.
- Above $44,000: up to 85% may be taxable.
If none of your benefits are federally taxable, Line 6b is zero, nothing carries into your Arizona AGI, and the state subtraction is simply zero. The federal calculation is what decides the size of the number you subtract in Arizona.
The Married Filing Separately Trap
Filing status can wipe out the federal exemption thresholds entirely. If you file married filing separately and lived with your spouse at any point during the year, your base amount drops to zero, and up to 85% of your Social Security is automatically federally taxable regardless of how low your income is.4Office of the Law Revision Counsel. 26 USC 86 – Social Security and Tier 1 Railroad Retirement Benefits Only couples who lived apart for the entire year get the same $25,000 and $34,000 thresholds that single filers use.3Internal Revenue Service. Publication 915 – Social Security and Equivalent Railroad Retirement Benefits Arizona still lets you subtract whatever ends up on Line 6b, but that Line 6b figure will be far larger than it would be on a joint return. Run the numbers both ways before committing.
SSI and Railroad Retirement
Supplemental Security Income is a separate program, and the IRS does not tax SSI payments at all.5Internal Revenue Service. Social Security Income SSI never enters your federal adjusted gross income, so it never appears on your Arizona return and there is nothing to subtract.
Tier 1 Railroad Retirement benefits follow the same federal rules as Social Security under IRC Section 86, with the same provisional income thresholds. Arizona’s subtraction under ARS 43-1022 covers railroad retirement benefits alongside Social Security, so the combined amount reported on Line 6b comes out of your Arizona gross income the same way.1Arizona Legislature. Arizona Revised Statutes 43-1022 – Subtractions From Arizona Gross Income
If You Missed the Subtraction on a Past Return
If you filed an Arizona return in an earlier year and forgot to subtract your Social Security, you overpaid. You can file an amended return on Arizona Form 140X to claim the missed subtraction and request a refund. Arizona generally allows four years from the date the return was originally due or filed, whichever is later, to correct an overpayment.6Arizona Legislature. Arizona Revised Statutes 42-1104 – Statute of Limitation; Exceptions Check each year’s return against Line 6b of the matching federal form to see how much you may be owed.
Whether You Need to File at All
Not every Arizona retiree has to file a state return. The filing thresholds by status are:7Arizona Department of Revenue. Individual Income Tax Information
- Single or married filing separately: $15,750
- Head of household: $23,625
- Married filing jointly: $31,500
If Social Security is your only income source, you likely fall below these thresholds once the state subtraction is applied. If you also have pension income, investment earnings, or part-time wages, those can push you over the line. Even when your Arizona liability works out to zero, filing is the only way to claim the subtraction on record and close the year cleanly.