Inherited Asset Capital Gains Tax Calculator

Introduction to inherited asset capital gains tax

When an heir sells inherited property or investments, the prior owner’s purchase price often is not the tax starting point. In many U.S. cases, the asset receives a stepped-up basis: its fair market value on the date of death becomes the heir’s basis. The practical question is therefore usually how much the asset changed in value after death, rather than how much it appreciated during the deceased owner’s lifetime. This calculator estimates that post-death tax exposure before a sale of real estate, stock, cryptocurrency, a business interest, or another inherited asset.

A basis is the tax measurement used to determine gain or loss. For a purchased asset, it commonly begins with cost and can be adjusted for improvements, reinvested distributions, depreciation, and other events. For inherited assets, Internal Revenue Code section 1014 generally supplies a different starting point. The model on this page uses the fair market value at death as that new starting point. This can be especially important for a house bought decades ago, an investment portfolio with a very low cost basis, or a family business that has increased in value over many years.

The original basis is still worth entering, even though it is not used for the main inherited-gain calculation. It provides a useful comparison with the outcome if the deceased owner had sold before death. That comparison does not prove a tax result, but it makes the economic effect of a full step-up easier to understand. If an asset worth $500,000 at death was originally purchased for $100,000 and later sells for $525,000, the model focuses on $25,000 of post-death appreciation, not the entire $425,000 increase during the prior owner’s lifetime.

Do not confuse a step-up with a cash payment from the government or a rule that eliminates every tax connected with an inherited sale. It is a basis rule. Selling expenses, state rules, depreciation recapture, trust administration, estate elections, and income from other sources can all matter. A carefully supported date-of-death valuation is therefore as important as the arithmetic. For real estate, an appraisal or other credible valuation evidence may be appropriate; for marketable securities, the estate’s valuation and brokerage records are often central.

How to use the inherited asset capital gains tax calculator

Start by selecting the asset type. The real estate, securities, business, cryptocurrency, and other choices use the same broad basis logic, while investment property activates the simplified depreciation-recature estimate when years of depreciation are entered. Next, enter fair market value at death. In this calculator, that amount becomes the new basis. Enter the deceased owner’s original cost basis as well, because the results compare the inherited scenario with a historical-basis scenario.

Enter the expected gross sale price before selling costs and tax. This page deliberately does not deduct commissions, transfer taxes, legal fees, capital improvements, capital losses, or other adjustments. Those omissions keep the estimate understandable, but they also mean the result is not a substitute for a return calculation. The months between death and sale are displayed in the narrative summary as planning context. They do not change the formula here, because the simplified model assumes the relevant valuation remains the fair market value at death.

The filing-status field chooses a simplified Net Investment Income Tax threshold. The federal-bracket selection is used in two different ways. With the long-term selection, brackets of 12% or below produce a 0% capital-gains rate in this model, brackets through 24% use 15%, and higher brackets use 20%. With the short-term selection, the selected ordinary-income bracket becomes the assumed gain rate. Assets acquired from a decedent generally receive long-term treatment under federal rules even if the heir sells promptly, but the alternate choice allows a user to test a different fact pattern.

Finally, enter total net investment income for the year and a flat state capital-gains rate if one is useful for planning. The calculator applies a simplified 3.8% NIIT estimate only when the model’s income threshold is exceeded. A zero in either optional planning field is appropriate when the item does not apply or when you prefer to review that component separately. Press Calculate Capital Gains Tax to reveal the basis, tax, proceeds, comparison, and plain-language summary.

Inherited asset tax formula and result interpretation

The calculator first limits the post-death sale gain to zero or more. In other words, a sale below the supplied date-of-death value does not create a negative tax bill in this tool. It then estimates federal capital gains tax, state tax, NIIT where the simplified income threshold is exceeded, and recapture for the investment-property assumption. The result tables are arranged so that the source of each amount remains visible rather than being hidden inside one total.

Read the first results table as the basis story. Fair market value at death is the modeled stepped-up basis, and sale price less that basis is the modeled capital gain. Read the next table as the tax story. The federal rate is a planning assumption rather than a progressive tax computation. Recapture, NIIT, and state tax are shown separately because their rules are not interchangeable with the regular long-term capital-gains rate. The final table shows gross sale price less the modeled taxes; it does not represent net cash after commissions, mortgages, liens, closing costs, or estate expenses.

The effective tax rate divides the total modeled tax by sale price. Tax per dollar of gain divides total modeled tax by the combined gain and recapture base when that base is positive. Neither number is an official tax rate. They are useful comparison tools when evaluating whether to sell promptly, retain an asset, gather more valuation support, or ask an adviser to model a more complete transaction. A very low effective tax rate may simply reflect a large stepped-up basis, not a broad exemption from tax.

Worked example: inherited securities sold after a six-month hold

Suppose an heir receives a portfolio with a fair market value of $500,000 on the date of death. The deceased owner originally paid $300,000. Six months later, the heir expects to sell it for $550,000. The calculator treats $500,000 as the stepped-up basis. The modeled capital gain is therefore $50,000: the $550,000 sale price minus the $500,000 date-of-death value.

Assume long-term inherited-asset treatment, a 15% federal capital-gains rate under the calculator’s bracket logic, and a 5% state capital-gains rate. Before NIIT and recapture, the example produces $7,500 of estimated federal tax and $2,500 of estimated state tax. The basic total is $10,000, leaving $540,000 before selling costs. If the heir’s investment income and other income place the transaction above the applicable NIIT threshold, the 3.8% estimate can increase the total. If the portfolio sells for less than $500,000, this calculator shows no gain tax but does not calculate or carry forward a capital loss.

For comparison, the deceased owner’s historical basis of $300,000 would produce a $250,000 gain at the same $550,000 sale price. The comparison panel estimates the tax using that larger gain and then shows the difference. This is why inherited assets should not be reported using a remembered purchase price without first reviewing estate records and current tax guidance. The correct basis may be materially different from both the original purchase price and the value shown on an old account statement.

Assumptions and limits for an inherited asset sale

This inherited asset tax calculator is a planning tool, not a tax return, legal opinion, appraisal, or valuation report. It assumes a full step-up to fair market value at death and applies one selected federal rate to the gain. In reality, the basis can be affected by an alternate valuation election, partial interests, special-use valuations, partnership adjustments, community-property treatment, estate administration, prior gifts, trusts, foreign assets, and asset-specific rules. An inherited asset can also receive a basis adjustment downward in situations not captured by this simplified page.

The calculator does not determine whether the reported fair market value is defensible. A date-of-death appraisal for real property, the estate tax return when applicable, a fiduciary accounting, brokerage valuation reports, and contemporaneous records may all be relevant. Closely held business interests, artwork, mineral rights, private-company shares, and fractional real-estate interests frequently require more valuation judgment than publicly traded securities. A number entered in a form is useful for scenario planning; it is not proof of a tax basis.

Depreciation recapture deserves special care. The investment-property field estimates accumulated depreciation from 80% of original basis over a 27.5-year schedule and taxes the result at 25%. Actual recapture depends on the property, its placed-in-service date, actual depreciation claimed or allowable, improvements, land allocation, prior exchanges, passive activity rules, and many other facts. It can be inappropriate to infer recapture from years of ownership alone. Treat the recapture row as a conversation starter for property records, not a final amount.

NIIT is also simplified. The actual tax generally considers modified adjusted gross income and net investment income, and it applies to the lesser of relevant excess income or net investment income. This page uses the entered investment income, the modeled gain, a filing-status threshold, and a 3.8% rate as a quick estimate. State taxation can be more complicated still: some states have no individual income tax, some tax gains as ordinary income, and residency or source rules can determine which jurisdiction may tax a sale.

Keep in mind that a capital gain is not necessarily the only financial consequence of a sale. A home may have a mortgage payoff, a business may have entity-level consequences, a beneficiary may owe estate expenses, and an asset in a trust may create fiduciary income-tax issues. Selling costs usually reduce amount realized and can change taxable gain, but this calculator uses sale price before those costs. Before committing to a significant transaction, assemble records and ask a CPA, enrolled agent, tax attorney, fiduciary, or other qualified professional to review the facts.