Capital Gains Tax Calculator 2024
Calculate federal and state capital gains tax on your investments — short-term vs long-term, NIIT, and all 50 states.
Capital Gains Tax Calculator
2024 federal + state rates · short-term & long-term · NIIT
📈Investment Details
🧾Tax Breakdown
Gross Gain / Loss
$5,000.00
$15,000.00 sale − $10,000.00 cost basis
Federal Capital Gains Tax
$750.00
Effective rate: 15.00% · Long-term rates (0/15/20%)
State Tax — California
$665.00
13.30% flat rate · Highest in nation — taxed as ordinary income
Net Investment Income Tax (NIIT)
$0.00
3.8% on gains above $200,000 MAGI
Total Tax
$1,415.00
Effective total rate: 28.30%
Net Proceeds (after all taxes)
$3,585.00
$15,000.00 sale − $1,415.00 total tax
📋2024 Tax Rate Reference
Long-Term Capital Gains Rates (2024)
Key Tax Notes
- • Short-term gains (<1 year) taxed at ordinary income rates (10–37%)
- • Long-term gains (>1 year) qualify for preferential 0/15/20% rates
- • NIIT adds 3.8% for high earners (MAGI > $200K/$250K)
- • State taxes vary widely — CA up to 13.3%, TX/FL 0%
- • Losses can offset gains + up to $3,000 ordinary income
For informational purposes only. Tax laws change — consult a qualified tax professional before making financial decisions. Figures based on 2024 IRS tables.