Capital Gains Tax Calculators
Capital Gains Tax Calculator
This calculator estimates federal capital gains tax from sale price, cost basis, selling costs, holding period, filing status, and other taxable income using 2026 federal thresholds.
Federal capital gains estimate
Estimated federal tax
$5,700
Long-term capital gain
Breakdown
About this calculator
Estimate the federal tax on a short-term or long-term capital gain. The calculation separates taxable proceeds, basis, holding period, and other taxable income so the bracket effect is visible.
What the estimate includes
The calculator subtracts selling costs and basis from the sale price to find the gain, then treats gains held more than 12 months as long-term.
Long-term gains use the 2026 federal 0 percent, 15 percent, and 20 percent taxable-income thresholds. Short-term gains are taxed as ordinary income on top of other taxable income.
What it leaves out
The estimate does not model state tax, the net investment income tax, home-sale exclusions, wash sales, loss carryforwards, depreciation recapture, or asset-specific rules.
Use it for a first-pass federal estimate before getting tax advice on a real sale.
By variant
Questions
- Does this include state capital gains tax?
- No. It estimates federal tax only and leaves state rules out.
- When is a gain treated as long-term?
- This tool treats the gain as long-term when the holding period is more than 12 months.
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