USA Long-Term Capital Gains Tax Calculator
Enter your other taxable income and your long-term capital gain to estimate the federal tax on that gain.
USA Long-Term Capital Gains Tax Calculator
Estimate federal long-term capital gains tax (single filer), including the Net Investment Income Tax.
Long-term capital gains stack on top of your ordinary taxable income and are taxed at 0%, 15% or 20% depending on which bracket that income falls into. High earners may also owe the 3.8% Net Investment Income Tax (NIIT) on top.
Example
- With the default values shown above, this calculator returns: Total Taxable Income (incl. gain) ≈ USD 110,000.00; Capital Gains Tax ≈ USD 4,500.00; Net Investment Income Tax (3.8%) ≈ USD 0.00; Total Tax on Gain ≈ USD 4,500.00.
Frequently Asked Questions
Why does my gain use two different tax rates?
Long-term capital gains are stacked on top of your ordinary income, so part of a large gain can fall in the 15% bracket while the rest spills into the 20% bracket — this calculator computes that split automatically.
Who owes the Net Investment Income Tax?
Single filers with modified adjusted gross income over $200,000 owe an additional 3.8% NIIT on the lesser of their net investment income or the amount over that threshold.