Capital Gains Tax Calculator
Calculate federal long-term and short-term capital gains tax, NIIT surcharge, and state capital gains tax.
Tax year
Long-term capital gains tax
$2,250
15% federal rate on $15,000
Total capital gains tax
$2,250
On $15,000 in total gains
Effective rate on gains
15.0%
Total tax ÷ total gains
Show the math
Long-term capital gains are taxed at 0%, 15%, or 20% depending on your total taxable income including the gains. Short-term gains are added to ordinary income and taxed at the same bracket rates (10%–37%).
LT gains tax = $15,000 × 15% = $2,250
Total gains tax = $2,250 = $2,250
Your effective rate on $15,000 of total gains is 15.0% after all federal and state taxes.
Frequently asked questions
No data stored•Updated June 2026