The Arizona capital gains tax runs off the state’s flat 2.5% individual income tax rate, but a 25% subtraction on qualifying long-term gains pulls the effective state rate down to 1.875%. Short-term gains, meaning assets held one year or less, get no subtraction and pay the full 2.5%. Whatever Arizona charges sits on top of federal capital gains tax, so your real cost depends on both layers.
How Arizona Taxes Long-Term vs. Short-Term Gains
Arizona begins your state return with the federal adjusted gross income from your Form 1040. The legislature has adopted the federal Internal Revenue Code’s income definitions, so the short-term and long-term capital gains you calculate federally carry straight over without recalculation.1Arizona Legislature. Arizona Code 43-102 – Declaration of Intent
Held one year or less, a gain is short-term and taxed federally at your ordinary income rate. Held longer than a year, it is long-term and gets preferential federal rates plus Arizona’s subtraction.2Internal Revenue Service. Topic No. 409, Capital Gains and Losses Capital gains are not carved out into a separate Arizona category; they flow into your Arizona gross income at the flat 2.5% rate that took effect in tax year 2023.3Arizona Legislature. SB1828 – 551R – Senate Fact Sheet – Omnibus; Taxation
The 25% Long-Term Capital Gains Subtraction
Arizona’s most valuable provision for investors is a subtraction equal to 25% of the net long-term capital gains included in your federal AGI. Only 75% of a qualifying long-term gain gets taxed, which is how the effective rate lands at 1.875% instead of 2.5%.4Arizona Legislature. Arizona Code 43-1022 – Subtractions From Arizona Gross Income
There is a catch that trips up long-time investors: the subtraction only applies to assets acquired after December 31, 2011. Stock you bought in 2005 and sell today produces a long-term gain federally but does not qualify for Arizona’s 25% subtraction. For gifted or inherited property, the acquisition date is the date the original owner acquired the asset, not when it was transferred to you.4Arizona Legislature. Arizona Code 43-1022 – Subtractions From Arizona Gross Income
If you cannot document when you acquired an asset, the subtraction is disallowed outright. Keep brokerage statements, purchase confirmations, and closing documents. Most disputes with the Arizona Department of Revenue on this subtraction turn on proof of the acquisition date, not on whether the gain itself qualifies.
Federal Exclusions That Also Cut Your Arizona Tax
Because Arizona starts with federal AGI, any federal exclusion that keeps a gain out of AGI keeps it out of your Arizona tax base too. No separate Arizona claim is needed.
Selling Your Home
Own and live in your primary residence for at least two of the five years before selling, and you can exclude up to $250,000 of gain if single, or $500,000 if married filing jointly.5Office of the Law Revision Counsel. 26 USC 121 – Exclusion of Gain From Sale of Principal Residence That excluded amount never appears in federal AGI, so Arizona never sees it.
Inherited Property and Arizona’s Community Property Advantage
Inherited assets get a stepped-up basis to the fair market value at the date of death, wiping out tax on appreciation during the decedent’s lifetime. Arizona is a community property state, which amplifies the benefit: when one spouse dies, both halves of community property receive the step-up, not just the decedent’s half.6Office of the Law Revision Counsel. 26 USC 1014 – Basis of Property Acquired From a Decedent If an Arizona couple bought stock together for $100,000 and it was worth $500,000 when one spouse died, the survivor’s new basis is the full $500,000. In a non-community-property state, only the decedent’s half would step up, leaving a basis of $300,000.
Qualified Small Business Stock
Federal Section 1202 lets you exclude up to 100% of gain on qualifying C corporation stock held more than five years, capped at the greater of $10 million or ten times your adjusted basis. Because the exclusion pulls the gain out of federal AGI, Arizona conforms automatically.
What Your Combined Federal and Arizona Rate Looks Like
The total tax on a capital gain is federal plus Arizona. Federal long-term rates are 0%, 15%, or 20% depending on taxable income, with 28% on collectibles and 25% on the depreciation-recapture portion of real estate sales.2Internal Revenue Service. Topic No. 409, Capital Gains and Losses Short-term gains are taxed federally at ordinary rates that reach 37%.
Add Arizona on top: 1.875% on a qualifying long-term gain, or 2.5% on a short-term gain. A single filer in the 15% federal long-term bracket selling a qualifying asset pays a combined rate of roughly 16.875%.
The 3.8% Net Investment Income Tax
Higher earners owe an additional 3.8% federal surtax on net investment income, including capital gains, once modified adjusted gross income exceeds $200,000 (single), $250,000 (married filing jointly), or $125,000 (married filing separately).7Internal Revenue Service. Topic No. 559, Net Investment Income Tax Those thresholds are not indexed for inflation. Arizona has no equivalent surtax, but a single large gain can push your income over the federal threshold and trigger the 3.8% tax on income that would otherwise have escaped it.
Deferring a Gain With a 1031 Exchange
A 1031 like-kind exchange lets you sell investment or business real property and roll the proceeds into similar property without recognizing gain. Because Arizona conforms to the IRC, the deferral works at both levels. Since the 2017 Tax Cuts and Jobs Act, only real property qualifies. Personal property, equipment, and collectibles are out.8Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use in a Trade or Business
The two deadlines are unforgiving. You have 45 days from selling the relinquished property to identify replacement property in writing, and 180 days to close on it. Miss either and the whole gain becomes taxable in the year of the original sale.8Office of the Law Revision Counsel. 26 USC 1031 – Exchange of Real Property Held for Productive Use in a Trade or Business
Losses, Wash Sales, and Carryforwards
If capital losses exceed capital gains in a year, you can deduct up to $3,000 of the excess against ordinary income ($1,500 if married filing separately). Anything beyond that carries forward to future years.2Internal Revenue Service. Topic No. 409, Capital Gains and Losses
The wash sale rule disallows a loss if you buy the same or a substantially identical security within 30 days before or after the sale. The disallowed loss is added to the basis of the replacement shares, deferring the benefit rather than eliminating it. The rule reaches across all your accounts, including IRAs and your spouse’s accounts.9Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities Both the loss limit and the wash sale rule flow through to Arizona through the shared AGI starting point.
Cryptocurrency Gains
The IRS treats cryptocurrency and other digital assets as property. Selling crypto, swapping one coin for another, or using crypto to buy goods each triggers a taxable event, with the same holding-period rules as stocks.10Internal Revenue Service. Frequently Asked Questions on Virtual Currency Transactions Because Arizona begins with federal AGI, crypto gains are taxed at the state level exactly like stock gains, and long-term gains on tokens acquired after 2011 qualify for the 25% subtraction. The practical challenge is documenting every acquisition cost, sale price, and holding period yourself.
Who Owes Arizona Capital Gains Tax
Arizona defines a resident as someone in the state for other than a temporary purpose, someone domiciled in Arizona who is temporarily away, or anyone who spends more than nine months of the tax year in the state (a rebuttable presumption).11Arizona Legislature. Arizona Code 43-104 – Definitions
- Full-year residents owe Arizona tax on all capital gains regardless of where the asset was located. If another state taxes the same gain, you can claim a credit on your Arizona return for taxes paid to that state.
- Nonresidents owe Arizona tax only on gains from Arizona sources, generally meaning real property located in Arizona. Gains from selling stocks, bonds, or other intangible assets are typically not Arizona-source income for nonresidents.
- Part-year residents owe tax on everything earned while an Arizona resident, plus Arizona-source income earned during the nonresident portion of the year. Form 140PY allocates the income.
Estimated Tax Payments After a Large Gain
A big capital gain can create an estimated tax obligation at both levels. Arizona requires estimated payments if your Arizona gross income exceeds $75,000 ($150,000 on a joint return) and your prior-year income also cleared those thresholds. Payments must total at least 90% of your current-year Arizona liability or 100% of last year’s, whichever is smaller. Arizona waives underpayment penalties if the tax due on the return is under $1,000.12Arizona Legislature. Arizona Code 43-581 – Payment of Estimated Tax; Rules; Penalty; Forms
Federally, estimated tax is due if you expect to owe $1,000 or more after withholding and credits. The safe harbor is 90% of the current year or 100% of the prior year, rising to 110% if prior-year AGI exceeded $150,000.13Internal Revenue Service. 2026 Form 1040-ES Estimated Tax for Individuals Both sets of payments run in four quarterly installments. Sell a highly appreciated asset mid-year with no wages being withheld, and skipping estimated payments can generate penalties at both levels.
Claiming the Subtraction on Your Arizona Return
Full-year residents file Form 140, starting with federal AGI. The 25% long-term capital gains subtraction is claimed in the subtractions section: identify the qualifying gain, calculate the subtraction, and enter it on the appropriate line. If you skip that step, you pay 2.5% instead of 1.875%, and the Arizona Department of Revenue will not correct the error for you.
Nonresidents use Form 140NR to limit tax to Arizona-source income. Part-year residents use Form 140PY to split income between their resident and nonresident periods. All three forms begin with federal AGI and apply the same subtraction rules to qualifying long-term gains within their allocation.