Investing & Portfolio

Capital Gains Calculator

Estimate gain and tax from proceeds after selling costs, adjusted basis, and an entered capital-gains rate.

Inputs4 editable fields
RatesUser-entered assumptions
ModelInvesting & Portfolio
Finance calculator

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The defaults are sample values. Replace them with current numbers from the decision you are modeling.

Calculations run in this browser and do not transmit your entries.

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Change the sample inputs to match your scenario.

The decision behind Capital Gains Calculator

Estimate gain and tax from proceeds after selling costs, adjusted basis, and an entered capital-gains rate.

Capital Gains Calculator is most useful as a scenario ledger: identify the account or income stream, choose a valuation date, and keep every assumption attached to that case.

After documenting capital gains, treat etf fee comparison as a separate question in the ETF Fee Comparison Calculator. The Mutual Fund Fee Calculator is the cleaner place to test mutual fund fee without changing this capital gains scenario. When bond yield becomes relevant, carry only the matching assumptions into the Bond Yield Calculator.

Capital Gains Calculator can lead to a distinct tax-loss harvesting estimate question. Keep that calculation separate in the Tax-Loss Harvesting Estimate Calculator so the capital gains assumptions remain unchanged.

Loaded scenario to audit for capital gains

The Capital Gains Calculator demonstration begins with Gross sale proceeds $42,000; Selling costs $400; Adjusted cost basis $28,000; Entered capital-gains rate %15. These entries test the form and calculation order; they are not current market assumptions, recommendations, or typical retirement facts.

For capital gains, replace the demonstration as one complete set. Then vary Entered capital-gains rate while holding the other Capital Gains Calculator entries fixed.

Interpreting the Capital Gains Calculator result

Separate the capital gains headline from its supporting rows. An ending value, tax estimate, trade amount, annual income, rate, and break-even age each answer a different question.

A saved capital gains answer should retain its unit, valuation date, and modeled assumptions so it cannot be mistaken for a guaranteed or official amount.

Where the capital gains estimate stops

Capital gains cannot predict market prices, distributions, interest rates, defaults, liquidity, taxes, trading costs, or investor behavior. Constant returns and yields are scenario inputs, and an illustrative allocation is not a recommendation.

Reconcile Capital Gains Calculator with account statements, plan documents, benefit estimates, prospectuses, tax instructions, or other governing records before relying on it.

Assumptions entered for capital gains

Gross sale proceeds. Proceeds before selling costs. In the Capital Gains Calculator record, this value changes the scale of Selling costs. Preserve its source and valuation date.

Selling costs. Entered costs reducing net proceeds. In the Capital Gains Calculator record, this value provides the period used by Adjusted cost basis. Preserve its source and valuation date.

Adjusted cost basis. User-entered basis for the assets sold. In the Capital Gains Calculator record, this value defines the starting position before Entered capital-gains rate. Preserve its source and valuation date.

Entered capital-gains rate. Flat planning rate applied to positive gain. In the Capital Gains Calculator record, this value must share a valuation date with Gross sale proceeds. Preserve its source and valuation date.

How Capital Gains Calculator transforms the inputs

Gain equals sale proceeds minus selling costs and adjusted basis; estimated tax applies the entered rate only to a positive gain.

Capital Gains Calculator uses the visible values only; no unstated market return, inflation rate, tax rule, benefit amount, or account limit is inserted.

Questions about capital gains

What should accompany a saved capital gains result?

Keep the Capital Gains Calculator inputs, result date, formula scope, and the source or rationale behind each modeled percentage with the saved output.

Why preserve the original Capital Gains Calculator scenario?

A saved capital gains baseline identifies whether a later difference came from Entered capital-gains rate, another assumption, or an actual account or plan change.

When should Capital Gains Calculator be recalculated?

Capital gains should be refreshed after a balance, contribution, distribution, benefit estimate, rate, fee, tax assumption, or planning horizon changes.

Which date belongs on the capital gains inputs?

Capital Gains Calculator should use the valuation date attached to Gross sale proceeds. Align the remaining balances and cash flows with that date or clearly label their conversion.

How should two capital gains cases be compared?

A fair Capital Gains Calculator comparison holds the valuation date, cash-flow timing, units, and unchanged assumptions constant before varying one uncertain input.