Selling an investment in Alabama triggers two taxes: the federal capital gains tax and Alabama’s state income tax. Because Alabama gives no break for long-term gains, the state side is simply your ordinary rate. This calculator combines both so you can see the full cost of a sale.
How it works
The federal treatment depends on how long you held the asset. Long-term gains (held more than a year) use preferential rates that stack on your other taxable income:
0% up to $47,025 single / $94,050 joint of total income
15% from there up to $518,900 / $583,750
20% above those thresholds
Short-term gains (held a year or less) are taxed at your ordinary federal rate. A 3.8 percent net investment income tax applies to gains above 200,000 dollars single or 250,000 dollars joint of modified AGI. Alabama then taxes the entire gain as ordinary income at 2 / 4 / 5 percent, stacked on your other income, so for most filers the state share is the 5 percent marginal rate.
Example
A single filer with 80,000 dollars of other income and a 20,000 dollar long-term gain has already used the 0 percent band, so the federal gain is taxed at 15 percent (3,000 dollars). Alabama adds 5 percent (1,000 dollars). Total tax on the gain is about 4,000 dollars, leaving 16,000 dollars after tax.
Notes
This is a simplified model. Real returns involve loss carryovers, the exact NIIT calculation on net investment income, qualified dividends, and Alabama’s federal income tax deduction, none of which are fully modeled here. Use it for planning and confirm with the current rules at irs.gov and revenue.alabama.gov.