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Taxes/US Capital Gains Tax Calculator

US Capital Gains Tax Calculator

Calculate federal, NIIT, and state capital gains tax for 2025.

2026 RATES50 statesShort/long termNIIT2026 brackets
$
$
✅ Long-term (>365 days = lower tax)
$
+$35000Long-term capital gain
Effective rate: 24.3%
Federal Capital Gains Tax−$5250
State Tax (CA)−$3255
Total Tax Owed
$8505
Net Proceeds
$76495
After all federal & state tax
💡 Long-term gains are taxed at 0%, 15%, or 20% — much lower than short-term.
Data Source & Legal Disclaimer
Effective: 2025 tax year (IRS Rev. Proc. 2024-40)Last updated: 2 days agoUpdate: Annual
Sources: IRS Revenue Procedure 2024-40 (2025 inflation adjustments) · IRS.gov — Tax Brackets & Rates · State tax rates: respective state Department of Revenue websites · IRS Pub 550 — Investment Income & Expenses

Long-term capital gains rates (0%/15%/20%) are based on IRS inflation-adjusted brackets for 2025 (Rev. Proc. 2024-40). NIIT (3.8%) applies above $200K/$250K. State rates are simplified. This is for estimation only — consult a tax professional.

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