The State Capital Gain Calculator estimates state tax on a capital transaction using sale proceeds, adjusted basis, selling costs, a user-entered state gain rate, and available state capital-loss offsets. It separates economic gain from the gain remaining after the entered offset.
States differ in whether capital gains receive ordinary, preferential, excluded, or no broad income-tax treatment. For that reason, the calculator requires the applicable state rate as an input instead of embedding a single rule. It also does not calculate federal tax, depreciation recapture, or transaction-specific exclusions.
1. Enter sale proceeds
Use gross proceeds attributable to the transaction.
2. Enter adjusted basis
Use basis after qualifying additions and reductions.
3. Subtract selling costs
Include transaction costs that reduce gain under the applicable rules.
4. Apply an available loss offset
Enter the portion of state capital losses allowed against this gain in the scenario.
5. Set the state rate
Use the rate that applies to the gain under the relevant state and year, then review tax and after-tax gain.
The result is the estimated state tax attributable to the gain remaining after the entered loss offset under the simplified rate assumption.
State conformity, loss limits, residency sourcing, exclusions, recapture, and holding-period rules may change the taxable amount or rate.
Given: $125,000 sale proceeds, $82,000 adjusted basis, $3,000 selling costs, a $5,000 loss offset, and a 6% state rate.
Calculation: Net gain = $125,000 − $82,000 − $3,000 = $40,000. Taxable gain = $40,000 − $5,000 = $35,000. State tax = $35,000 × 6% = $2,100.
Result: Estimated state capital-gain tax is $2,100.
Interpretation: After the modeled state tax, $37,900 of the $40,000 economic gain remains before federal tax or other adjustments.
Use the rate the state applies to this gain for the relevant year and taxpayer situation. State treatment varies.
Qualifying selling costs may reduce amount realized or otherwise affect gain. Enter only transaction costs permitted for basis or gain calculation.
The tax result is zero in this page. It does not calculate how a loss may offset other income or carry forward.
You can enter aggregated proceeds, basis, costs, and offsets when the same rate assumption is reasonable, but separate calculations may be clearer for different asset treatments.
No. The output is limited to the entered state-rate scenario.