Arizona Capital Gains Tax Calculator

Arizona applies one rate to every dollar of gain, so the interesting question on this page is not where the brackets step but whether they step at all. They do not, and the sweep says so at every scale tested. A $101 gain returns $2.53. A $12,000,000 gain returns $300,000.00. Both report an effective rate of 2.50% and a marginal rate of 2.50%, and so does every figure between them.

The pairs that would expose an edge in a graduated state come back with nothing between them here. At $2,999 of gain the tax is $74.98; at $3,001 it is $75.03, a two-dollar difference in gain costing five cents, which is the flat rate and nothing else. At $9,999,999 the tax is $249,999.98; at $10,000,000 it is $250,000.00. Several states place an exclusion cliff at exactly ten million dollars. Arizona does not, and the calculator confirms it: $250,025.00 at $10,001,000 is the same 2.50% carried straight through.

Arizona taxes a capital gain as ordinary income at a single flat rate of 2.5%, one of the lowest rates among states that tax income at all. Because the schedule has one band, the size of the gain and the size of your salary are both irrelevant to the rate: the first dollar of gain and the millionth are taxed identically.

That makes the state computation a single multiplication, with the effective rate falling straight out of it.

The full sequence:

1. Start with the net gain. Capital losses and loss carryforwards are netted first; what you enter is the net figure.
2. No preferential rate. Arizona has no separate capital gains rate and no long-term holding-period break, so the gain is taxed exactly as wages would be.
3. Apply the rate. Multiply the net gain by 2.5%. Because the schedule is flat, your other income does not push the gain into a higher band, and the calculator does not need to stack the two.
4. Effective rate. Total tax divided by realized gain, which on a flat schedule returns 2.5% at every gain size. Effective and marginal rates are the same number here.
5. Net proceeds. Subtract the state tax from the gain to get what you keep before federal tax.

Consider an investor in Arizona who realizes $100,000 in capital gains from a single asset sale during the year.

1. Identify the gain. The full $100,000 capital gain is added to gross income, since Arizona taxes capital gains at the same statutory rate as wages and other ordinary income, with no separate preferential rate for long-term holdings.
2. Apply the flat rate. Arizona's statutory individual income tax rate is a uniform 2.50%, applied to the entire gain regardless of the investor's total income or how long the asset was held.
3. Compute the tax due. $100,000 × 2.50% = $2,500.00, the state tax liability on this sale.
4. Net proceeds. Subtracting the $2,500.00 state tax from the $100,000 gain leaves the investor with $97,500.00 in state after-tax proceeds, before any federal capital gains tax is applied separately.

Because Arizona applies one flat rate to every dollar of gain, the effective state tax rate here equals the statutory rate itself: 2.50%.

Each additional $1,000 of realized gain costs $25.00 in Arizona tax. The engine confirms it at the ends of the range and in the middle: a $99,000 gain returns $2,475.00 and a $100,000 gain returns $2,500.00; a $10,000,000 gain returns $250,000.00 and a $10,001,000 gain returns $250,025.00. The same $25.00 per thousand at both ends is the practical definition of a flat schedule.

The twelve-row table steps the same slope. State tax due runs $416.67 on a $16,666.67 gain, $1,250.00 at $50,000.00, $2,500.00 at $100,000.00 and $5,000.00 at $200,000.00, with every row's Gain After State Tax column exactly 97.5% of the row above it in the Capital Gain column.

The usual reverse question -- how much can be realised before the next band -- returns no threshold in Arizona, so the useful version is the one about other income. Hold the gain at $100,000 and move other taxable income across $0, $3,000, $5,600, $11,200, $16,000, $26,400 and $75,000. The Arizona tax is $2,500.00 at all seven settings, and net proceeds stay at $97,500.00. A filer earning nothing else and a filer earning $75,000 pay the same state tax on the same gain, to the cent.

That is a real difference from most of the state pages in this corpus, where the other-income box decides how much of the gain lands in the top band. Here the field is retained for consistency across the family and has no effect on the result.

Assuming a long-term exclusion. Several states exclude half of a net long-term gain before applying their rate. Arizona does not, and the engine applies no exclusion. Running the rate against half of a $100,000 gain -- that is, entering $50,000 -- returns $1,250.00, which understates the actual $2,500.00 liability by $1,250.00 on a single sale.

Applying the rate to net proceeds instead of the gain. The calculator's output box shows $97,500.00 retained on the default inputs. Feeding that retained figure back in as if it were the gain returns $2,437.50, understating the bill by $62.50. The engine takes whatever gain you type at face value and has no way to detect the error, because it performs no netting, no basis reconstruction and no proceeds-to-gain conversion.

This calculator is precise about state tax, but several federal and transactional factors sit outside its scope: - Federal Capital Gains Taxes: Federal long-term brackets (0%, 15%, 20%) and short-term ordinary rates up to 37% under IRC § 1. - Net Investment Income Tax (NIIT): The 3.8% surtax on net investment income under IRC § 1411 for single filers over $200,000 (married joint over $250,000). - Alternative Minimum Tax (AMT): Federal AMT calculations under IRC § 55 impacting incentive stock option (ISO) exercise spread. - Section 1031 Like-Kind Exchanges: Tax deferral mechanisms for real property held for productive use in trade, business, or investment. - Qualified Small Business Stock (QSBS): Federal Section 1202 gain exclusions where state conformity varies significantly. - Loss netting: there is no capital loss input. The engine will not net losses or carryforwards against the gain you enter, and it cannot apply the $3,000 excess-loss allowance. - Arizona's standard deduction and exemptions: none are subtracted from the other-income figure. On a flat schedule this changes nothing, since the tax is $2,500.00 at every other-income setting tested, but the input is taken as typed rather than converted from gross pay.

• Assuming Federal Rate Parity: Most states do not offer preferential long-term capital gains rates; gains are taxed at standard ordinary income rates.
• Failing to Track Holding Periods: Short-term gains (assets held ≤1 year) generate higher federal tax liabilities even if state rates treat both holding periods identically.
• Underestimating Multi-State Apportionment: Selling real estate or business assets located in other jurisdictions triggers multi-state non-resident return filing obligations.
• Neglecting Underpayment Penalties: Substantial one-time liquidity events require prompt estimated tax payments within the quarter of sale to avoid statutory penalties.
• Mismatched Cost Basis Records: Failure to document reinvested dividends, stock splits, or structural return-of-capital distributions leads to inflated taxable gain calculations.

• Arizona Department of Revenue: 2026 Statutory Individual Income Tax Rate Schedules. azdor.gov
• Internal Revenue Service (IRS): Publication 544 (Sales and Other Dispositions of Assets) and Publication 550 (Investment Income and Expenses). irs.gov/publications/p544