Capital Gains Tax Calculator
Capital Gains Tax Calculator calculates estimated federal capital-gains tax; marginal/effective rates; net gain after estimated tax. Enter your assumptions above to get the primary answer first, followed by supporting metrics and detail where useful.
Inputs
Capital Gains Tax CalculatorResults
Adjust the inputs, then use the primary action. The result will appear here.
What this calculator answers
Capital Gains Tax Calculator calculates estimated federal capital-gains tax; marginal/effective rates; net gain after estimated tax. Enter your assumptions above to get the primary answer first, followed by supporting metrics and detail where useful.
How this calculation works
This tool uses tax year; filing status; ordinary taxable income; short/long-term gains; losses within scope. It returns estimated federal capital-gains tax; marginal/effective rates; net gain after estimated tax. Headline results, charts, schedules, comparisons and exports are generated from the same normalized calculation state.
Worked example
Estimated federal tax on entered gains: 1,500 • Net short-term gain: 0 • Net long-term gain: 10,000
Assumptions
Unless the tool says otherwise, rates are annual percentages, currency inputs are denominations rather than automatic FX conversions, and projections are mathematical models rather than guarantees. Typed values remain authoritative even outside normal slider ranges.
Limitations
Rules, limits, fees and tax calculations require a current versioned source package. When a source is stale or unavailable, the tool uses a truthful unavailable/manual state instead of pretending old data is current.
Sources & review
- IRS Revenue Procedure 2025-32 / 2026 inflation adjustments — United States federal tax/payroll rules. Last reviewed: 2026-09-25.
Privacy and review status
Financial inputs stay on this device by default and are not placed into analytics, advertising or error payloads. Review the methodology or report a calculation issue if something looks wrong. Methodology · Report a calculation issue.
Common questions
What does the Capital Gains Tax Calculator calculate?
It calculates estimated federal capital-gains tax; marginal/effective rates; net gain after estimated tax. The result is based on the inputs and assumptions shown on this page.
What inputs does the Capital Gains Tax Calculator use?
The main inputs are tax year; filing status; ordinary taxable income; short/long-term gains; losses within scope. Change them to model a different scenario.