2025 Capital Gains Tax Calculator
Calculate the tax on stock sales, investment gains, and other capital gains. Includes short-term, long-term, and NIIT calculations.
Capital Gains Details
$
$
Held less than 1 year — taxed as ordinary income
$
Held more than 1 year — preferential rates
Total Capital Gains Tax
$7,500
15.0% effective
After-Tax Proceeds
$42,500
NIIT (3.8%)
$0
Does not apply
Tax Breakdown
Long-Term Gains Tax (preferential rates)$7,500
Total Capital Gains Tax$7,500
Short-Term vs. Long-Term Capital Gains
The holding period determines how your gains are taxed. Assets held for one year or less generate short-term capital gains, which are taxed at your ordinary income tax rates. Assets held for more than one year generate long-term gains, which receive preferential tax rates of 0%, 15%, or 20%.
Net Investment Income Tax (NIIT)
High-income taxpayers may owe an additional 3.8% on investment income. This applies to the lesser of your net investment income or the amount by which your MAGI exceeds the threshold for your filing status.