Capital Gains Tax on a Home Sale: Exclusion Calculator

Estimate your home-sale gain from full adjusted basis, with a Section 121 cap settled elsewhere; the taxable gain shown isn't the tax due.

Taxable gain and exclusion, not the amount of tax owed.

Sale price for the modeled ownership interest

Eligible selling costs

Complete adjusted basis

Use complete tax basis, not purchase price alone.

Externally confirmed Section 121 exclusion mode

Total gain that cannot be excluded

Enter the separately determined part of gain that cannot be excluded.

Enter the complete amounts and select an exclusion mode.

Sources and assumptions

References checked:: 2026-10-01

This is gain and Section 121 exclusion arithmetic, not a tax bill, return, settlement statement or eligibility decision. All amounts refer to the same taxpayer and ownership interest; the tool does not allocate a jointly owned property. It does not calculate tax rates, NIIT, FIRPTA withholding or state taxes. A zero taxable-gain result does not establish zero actual tax or withholding.

Complete adjusted basis includes the applicable original basis, eligible original acquisition costs and capital improvements, less all required adjustments and allowed or allowable depreciation. Not every closing charge increases basis: loan-related fees are not automatically acquisition-basis costs. Routine repairs are not automatically capital improvements. Gift, inheritance and other special basis rules must be determined outside the model; an entered 0 is a documented assumption, not a default rule.

Eligible selling costs reduce the sale price once to obtain amount realized. Use applicable documented commissions and other eligible sale expenses, not every cash deduction on the closing statement. Mortgage principal payoff is not a selling-cost deduction or a basis adjustment here. Avoid counting any expense twice or treating FIRPTA withholding as an automatically eligible sale expense.

Full Section 121 limits generally require ownership AND main-home use for at least 2 years of the 5-year period ending at sale, and no exclusion on another sale during the preceding 2 years. For the full $500,000 joint-return limit, at least one spouse must meet the ownership test; both must meet the use test and the prior-exclusion restriction. Filing status alone is not qualification. Special rules, including surviving-spouse and other exceptions, require outside determination.

A partial exclusion limit must already be determined outside this tool. Separately enter the TOTAL non-excludable gain: applicable allowed or allowable depreciation for periods after May 6, 1997 and any nonqualified-use allocation, without overlapping amounts. The tool does not derive these components, home-office allocations or exception eligibility. Basis must already reflect depreciation; entering the non-excludable part limits exclusion and is not another basis deduction.

If the sale price minus selling costs is below your adjusted basis, the result is a loss and is shown as a negative number. A loss on a personal home generally isn't deductible; the calculator doesn't calculate a deductible loss, refund or credit. With no gain, the exclusion used and the taxable gain are $0, and the non-excludable amount must be 0. An unused exclusion is not a payment or credit.

Amounts keep cents. The calculation subtracts selling costs and your full adjusted basis, then applies the chosen exclusion limit only to the gain left after the non-excludable amount. The amounts shown add up to the cent; no tax rate is assumed. The $2 billion field limit is a form limit, not an IRS limit or a rounding rule for a tax return.

What This Calculator Does

For a U.S. home sale, this calculator works through the gain and the exclusion step by step. Feed it the full adjusted basis, the costs of selling that qualify and the exclusion cap you fixed before starting. The total non-excludable gain gets its own field. The gain, the chosen limit, the exclusion used and the taxable gain each come out on a separate line. It computes no tax owed and makes no call on eligibility.

Who Is This For

Florida home sellers and real estate professionals use it to review documented U.S. tax assumptions together with a tax adviser. Each run covers one taxpayer and one ownership interest, with no split between co-owners. It does not replace a basis determination, a tax return or your closing statement.

How It Works

Type dollar amounts for the sale price, allowable selling costs and full adjusted basis; when an item applies but has no amount, use 0. Next, pick your exclusion mode. The choices are no exclusion, the whole limit once it's confirmed, or a reduced cap worked out before you start. Only that last mode takes a partial amount. Non-excludable gain goes in as a TOTAL, or 0 if there is none. Check all eight outputs. Subtract depreciation a single time and never again. A taxable gain of zero doesn't mean your tax bill is nothing.

Frequently Asked Questions

Is my taxable gain the tax I owe?

No. Take the sale price, remove eligible selling costs, and the result is the amount realized. Deduct your complete adjusted basis from that figure and the difference is the gain. The Section 121 limit you chose reduces only eligible positive gain. What remains is taxable gain, not a tax figure. The tool leaves out the tax rate, the NIIT, state tax and any FIRPTA withholding, so the result shows neither zero tax nor a refund.

What goes into complete adjusted basis?

Your original basis, adjusted up and down. Add qualifying acquisition costs and capital improvements, then take out every required reduction, including depreciation allowed or allowable. Not every loan or closing charge belongs in basis. Say you paid $400,000, with $10,000 in eligible acquisition costs and $50,000 of improvements: basis is $460,000. Sell for $800,000 with $40,000 in selling costs and the gain is $300,000. With a confirmed $250,000 limit and nothing non-excludable, $50,000 is taxable, and that still isn't the tax you owe.

When can I choose the full $250,000 or $500,000 limit?

Only once your qualification has been settled separately. In general, ownership and main-home use must each reach at least 2 years inside the 5-year period before the sale. You also must not have claimed a Section 121 exclusion for a different sale within 2 years before this one. To get the full joint limit, either spouse may meet the ownership test, but both must meet the use test and both must pass the prior-exclusion rule. Filing jointly isn't enough. Surviving-spouse rules and other exceptions each need their own determination.

Does the tool figure a partial exclusion?

No. When your limit is reduced by a change of job, a health problem, circumstances you couldn't foresee or some other exception, that reduced figure is decided elsewhere. Select partial mode and enter the confirmed amount, which may be 0 when that is the limit that was determined. The calculator simply uses whatever figure you give it. It doesn't tally days that qualify, and it can't sign off on an exception.

What happens to the result with depreciation or nonqualified use?

Enter the TOTAL non-excludable gain, worked out before you open the tool. It covers applicable depreciation allowed or allowable for any period after May 6, 1997, plus any nonqualified-use allocations, with no overlap inside the total. Example: a $270,000 basis, a $500,000 sale and no selling costs, gain $230,000. Take out $30,000 non-excludable and $200,000 is eligible. A confirmed $250,000 limit excludes $200,000, leaving $30,000 taxable. Depreciation already subtracted from basis is never deducted again. The tool doesn't compute recapture tax or a home-office allocation.

What if the sale is a loss, the basis was inherited or taxable gain comes out zero?

A loss stays negative in the ledger. On a personal residence it generally isn't deductible, and it won't turn into a refund or a credit. If the sale shows no positive gain, the non-excludable figure is 0, and the exclusion applied and taxable gain read 0 as well. Inherited or gifted? Work out the proper basis separately, and don't treat it as zero to save time. A taxable gain of zero is no evidence that the tax, or the FIRPTA withholding, is zero too. Paying off your mortgage doesn't shrink the gain here.

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Related:Sellers Guide