Capital Gains Tax Calculator
Estimate 2026 U.S. long-term capital gains tax using filing status and taxable income.
Last updated: October 15, 2026
Estimated long-term capital gains tax
$0.00
- Net long-term gain: $0.00
- Gain taxed at 0%: $0.00
- Gain taxed at 15%: $0.00
- Gain taxed at 20%: $0.00
On this page
Quick summary: Estimate 2026 U.S. long-term capital gains tax using filing status and taxable income.
Read the method, example and limitations
Updated reference sections in this guide are in English.
Guide language: English. Updated October 15, 2026.
What this calculator estimates
The Capital Gains Tax Calculator estimates tax on investment gains from the difference between sale value and cost basis under the rate assumptions entered.
Inputs and units
Enter Filing status, Taxable ordinary income ($), Long-term capital gain ($), Capital losses / adjustments ($). Use the units shown. Required fields cannot be blank. Use zero only where that field and the model allow it. Select Calculate after changing the values.
Method and assumptions
Apply 2026 long-term gain thresholds by filing status. Enter ordinary taxable income, not gross wages. The gain after the entered basis adjustment first fills remaining room in the 0% bracket, then the 15% bracket, with the rest taxed at 20%.
Worked example
For a single filer with 48,000 ordinary taxable income and a 2,000 gain, 1,450 fits below the 49,450 zero-rate threshold. The remaining 550 is taxed at 15%, giving 82.50.
Limitations
The model excludes short-term gains, losses, NIIT, state tax, collectibles and unrecaptured real-estate depreciation. Income and gain must use the same year. This rate estimate is not a completed tax return.