Estimate your 2024 federal capital gains tax on stocks, real estate, crypto, and other assets.
Estimated Federal Tax Owed
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Capital Gain
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Tax Rate
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Effective Rate
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Net Proceeds
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This tool provides estimates for educational purposes only. Not financial or tax advice. Neither MayoCalc nor Cook Media Systems assumes any liability. See our Disclaimer and Terms.
Long-Term vs. Short-Term Capital Gains
Assets held more than one year qualify for preferential long-term rates: 0%, 15%, or 20% in 2024. Short-term gains are taxed as ordinary income at rates up to 37%. Waiting past the one-year mark before selling is one of the most impactful tax decisions an investor can make.
What counts as my cost basis?
Your basis is what you paid plus acquisition costs. For inherited assets, basis is typically stepped up to fair market value at death. For gifted assets, you inherit the original owner's basis.
What is the NIIT?
The 3.8% Net Investment Income Tax applies to investment income for earners above $200,000 (single) or $250,000 (married filing jointly).
How can I reduce capital gains taxes?
Key strategies: hold over one year for long-term rates, tax-loss harvesting, donating appreciated assets to charity, and timing sales in lower-income years.