Fancy Capital Gains Calculator
Estimate the federal, state & local capital-gains tax on a stock sale.
Then do fancy things like plot your after-tax value over the price history or scenario plan sales at different prices. Everything stays in your browser; your info is never sent to a server.
Important Legal Disclaimer — Please Read
This tool is provided for general informational and educational purposes only and does not constitute tax, legal, accounting, financial, or investment advice. We are not certified public accountants, enrolled agents, tax preparers, attorneys, registered investment advisers, broker-dealers, or financial planners, and nothing on this site creates any advisory, fiduciary, or professional-client relationship of any kind.
All calculations are estimates generated by automated formulas using simplified assumptions and 2025 tax data, and they may be inaccurate, incomplete, or out of date. Actual tax liability depends on your complete financial circumstances and on federal, state, and local laws that change frequently and are applied at the discretion of the relevant taxing authorities. This tool does not account for many factors that may affect your taxes — including but not limited to the alternative minimum tax, capital-loss carryovers, wash-sale rules, the qualified small business stock exclusion, surtaxes, phase-outs, credits, deductions, estimated-tax penalties, and state- or locality-specific rules and exclusions. Stock-price data is supplied by third parties and may be delayed, inaccurate, or unavailable.
You should not rely on any output from this tool as a substitute for the advice of a qualified professional. Always consult a licensed tax advisor, accountant, attorney, or financial professional before making any financial, investment, or tax decision. You are solely responsible for verifying all figures and for any decisions you make.
To the fullest extent permitted by law, this tool and its creators provide it “as is” and “as available,” without warranties of any kind, express or implied, including any implied warranties of accuracy, merchantability, or fitness for a particular purpose, and disclaim all liability for any loss or damage arising from your use of, or reliance on, this tool or its results. Use of this tool constitutes acceptance of these terms.