Arizona capital gains tax for a married couple: a worked example

State tax2026-10-07

A married couple in Arizona with $120,000 of other income and a $250,000 long-term gain pays $35,835 of federal income tax, $4,560 of the 3.8% tax and $4,688 of Arizona tax, and keeps $204,918.

• $4,688Arizona tax
• $35,835federal income tax
• $204,918kept

Federal Tax Layers

The key figures above show the total federal liability for a married couple filing jointly. This amount combines two distinct layers. First, the federal income tax applies to the long-term gain. Because the couple has other income, this gain sits above their ordinary earnings. The rate depends on where their total income falls within the federal brackets. Second, the investment income tax applies to the net investment income. This surcharge hits once income exceeds a specific joint threshold. Both layers are calculated separately but paid together. The table below breaks down these components clearly. It shows how much goes to ordinary federal tax and how much goes to the investment surcharge. The surcharge is not optional if the income threshold is crossed. It applies directly to the gain portion that exceeds the limit. Use the capital gains tax calculator to check your own figures.

Arizona State Rule

Arizona applies its own specific rule to long-term capital gains. The state does not tax the entire gain at its standard rate. Instead, it allows a subtraction from the taxable amount. For assets acquired after a certain date, a portion of the gain is excluded from state taxation. This exclusion reduces the taxable base significantly. The key figures show the resulting state tax amount. This amount is lower than what would be paid if the full gain were taxed. The rule encourages long-term holding by reducing the effective state tax burden. This benefit does not apply to short-term gains. Short-term gains are taxed as ordinary income without the same exclusion. The difference between long-term and short-term treatment is visible in the comparison data. Arizona’s approach creates a distinct advantage for long-term investors compared to those trading frequently. See the Arizona capital gains tax page for details.

Comparing Gain Types

The table above illustrates the difference between long-term and short-term treatment. A short-term gain receives no special exclusion under Arizona law. It is taxed as ordinary income. This results in a higher state tax liability for the same amount of profit. The long-term gain benefits from the partial exclusion, lowering the tax due. This difference is significant for taxpayers with substantial gains. The state tax for a short-term gain is higher than for a long-term gain. This is because the entire amount is subject to tax without reduction. The long-term gain has part of it removed from the calculation. Readers should note that the federal treatment also differs. Short-term gains are taxed at ordinary income rates. Long-term gains qualify for preferential rates. Both federal and state rules favor holding assets for longer periods. The key figures reflect this favorable treatment for the long-term scenario.

Net Amount Kept

After all taxes are deducted, the couple retains a specific portion of their gain. This net amount is shown in the key figures. It represents the profit remaining after federal income tax, the investment surcharge, and Arizona state tax are paid. The calculation is straightforward: subtract the total tax liability from the gross gain. The result is the cash kept by the taxpayers. This figure helps illustrate the effective tax burden on the investment. It is not a recommendation to hold or sell assets. It is simply the arithmetic outcome for this specific example. The kept amount varies based on other income levels and the type of gain. Higher other income can push the taxpayer into higher federal brackets. This reduces the net amount kept. The example assumes a fixed level of other income. Changing this variable would alter the final kept amount. The table provides the precise breakdown for this scenario.

Questions

Every figure on this page is computed by code from the 2026 federal brackets and capital gains thresholds (IRS Rev. Proc. 2025-32) and the 2026 state brackets. See the methodology.