#600 · Tax Tool

State Capital Gain Calculator

Estimate state capital gain tax, net gain, after-tax ROI, break-even sale value, and sale price sensitivity using purchase, sale, fee, and rate inputs.

Calculator

State capital gain inputs
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How to use this calculator

  1. Enter the requested federal or state tax values.
  2. Use your own rates, credits, deductions, payments, or sale values.
  3. Click Calculate to see the estimate, status, and supporting metrics.
  4. Use scenarios and related calculators to compare federal and state planning assumptions.

What the result means

The result estimates state tax on a capital gain and shows the gain remaining after state tax. It uses only your entered state rate.

Capital Gain = Sale Value - Purchase Cost - Selling Fees; State Capital Gain Tax = Capital Gain × State Capital Gain Tax Rate

Not every state taxes capital gains the same way. This calculator does not automatically apply state-specific rules.

Example calculation

For a $50,000 purchase, $75,000 sale, $1,000 fees, and a 6% state rate, gain is $24,000, state tax is $1,440, and net gain is $22,560.

Tips for better results

  • Track purchase cost, sale value, and fees.
  • Test sale price scenarios before selling an asset.
  • Compare state gain tax with federal capital gain estimates.

FAQ

What is state capital gain tax?

It is a user-entered estimate of tax on gain from selling an asset at the state level.

How is capital gain calculated?

Sale value minus purchase cost minus selling fees.

Are fees included?

Yes. Selling fees reduce the estimated gain.

Does every state tax capital gains?

No. State rules vary, so this calculator uses the rate you enter.

What is after-tax ROI?

It is net gain after state tax divided by purchase cost.

Capital gain sensitivity

ScenarioWhat it tests
Sale -10%Lower sale value impact.
Current saleCurrent entered value.
Sale +20%Higher sale value impact.

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