Inherited Asset Capital Gains Tax Calculator

How this inherited asset tax calculator helps

Inherited assets are taxed differently from assets you bought yourself, and that difference can be financially significant. In many U.S. situations, an heir does not use the deceased owner’s original purchase price as the starting point for capital gains tax. Instead, the starting point is often the asset’s fair market value on the date of death. That reset is commonly called a stepped-up basis. If an asset rose sharply in value during the original owner’s lifetime, much of that appreciation may disappear for your capital gains calculation. This page is built to help you estimate what that means in practical terms before you list inherited property, sell inherited stock, cash out a business interest, or liquidate cryptocurrency.

The calculator focuses on the question most heirs eventually ask: if I sell this inherited asset, how much gain is actually taxable to me, and how much tax might I owe? To answer that, the form asks for the date-of-death value, the deceased owner’s original basis, the expected sale price, your filing assumptions, a simplified federal bracket, a state tax rate, and—if the asset is inherited investment property—an estimate of prior depreciation. The results then break the answer into understandable pieces: basis and gain, estimated taxes, after-tax proceeds, and a comparison showing how much the stepped-up basis may have reduced the tax burden compared with a sale by the deceased owner.

That comparison is important because heirs often know the original cost basis and assume it still controls the tax outcome. In many inherited-asset cases, it does not. The deceased owner’s basis is still useful in this calculator, but mainly as a benchmark. It helps you see the economic value of the basis reset itself. If a parent bought a property for $120,000 decades ago and it was worth $620,000 at death, the heir may start with a $620,000 basis rather than $120,000. If the property is sold for about $620,000 soon after inheritance, the heir’s capital gain may be close to zero even though the property appreciated enormously over the parent’s lifetime.

When you fill out the form, begin with the asset details. Choose the asset type first because the calculator uses that choice to decide whether depreciation recapture should be estimated. Then enter the fair market value at death. In this model, that amount becomes the new basis used for the heir’s main gain calculation. Next, enter the deceased owner’s original basis. That number does not generally drive the inherited gain calculation here, but it does power the side-by-side comparison that estimates tax savings from the step-up. Finally, enter the expected sale price. If your sale price is the same as the fair market value at death, the calculator will usually show little or no capital gain. If your sale price is lower, this model does not create a taxable post-death gain.

The remaining inputs refine the estimate rather than replace the basic rule. Filing status affects the simplified Net Investment Income Tax threshold. The long-term versus short-term selector lets you model different federal rate assumptions. In real life, inherited assets often receive long-term capital gains treatment for federal purposes even if you sell quickly, but people still like the ability to test alternate assumptions. The federal bracket selector is a shortcut that helps the calculator assign a rate without running a full return. The state tax field is intentionally simple: you enter a flat percentage so you can see the rough impact of state taxation on your net proceeds.

If the asset is inherited investment real estate, the years-of-depreciation field matters because part of the tax bill can come from depreciation recapture. This calculator uses a simplified annual estimate rather than a detailed property schedule, so it is most useful for planning and comparison. The months-between-death-and-sale field is included because it is a common question and provides context, but this model does not change basis based on the number of months held. Think of it as a planning note rather than a calculation driver. After you submit the form, read the result blocks in order: first the stepped-up basis and gain, then the estimated taxes, then the after-tax proceeds, and finally the comparison with a deceased-owner sale. That sequence usually makes it easy to see whether the projected tax bill is being driven by post-death appreciation, depreciation recapture, NIIT exposure, or state tax.

This calculator is intentionally practical. It is not trying to replicate every IRS worksheet or every state return. Instead, it gives you a fast way to test scenarios such as selling immediately, waiting for a stronger market, or comparing one inherited asset against another. If you are deciding whether to keep an inherited rental, whether to sell inherited stock now, or whether a low post-death gain makes a quick sale attractive, the estimate can help you organize your thinking before you talk with a CPA or advisor.

Formula and result interpretation

The heart of the calculation is simple: capital gain starts with the amount by which your sale price exceeds the fair market value at death. From there, the calculator estimates federal capital gains tax using your selected rate assumption, adds a simplified state tax, adds a simplified NIIT amount when the threshold is exceeded, and adds depreciation recapture tax when relevant for inherited investment property. These formulas are shown below exactly as used in the page narrative.

The result is easiest to interpret when you separate the tax sources. A low sale gain paired with a larger tax bill usually means one of two things in this model: depreciation recapture is contributing a meaningful amount, or the NIIT and state tax assumptions are doing more of the work than the capital gains rate alone. By contrast, if the asset was inherited recently and the expected sale price is close to the date-of-death value, the estimated gain can be small even when the deceased owner had a very low original basis. That is the practical value of stepped-up basis: it resets the tax starting line for the heir.

Worked example and key assumptions

Suppose you inherit an asset with a fair market value at death of $500,000. The deceased owner’s original basis was $300,000, and you later sell for $550,000. Under the stepped-up basis rule, your working basis in this calculator is $500,000 rather than $300,000. Your gain is therefore $50,000 rather than $250,000. If you model a 15% federal long-term rate and a 5% state tax rate, the calculator will show a rough federal tax of $7,500 and a rough state tax of $2,500 before any NIIT or recapture effects. That is why heirs often discover that selling soon after inheritance can produce a much smaller tax bill than they expected.

Even so, the number on this page is an estimate, not a filed return. Real outcomes can differ when you have capital losses, installment sale treatment, trust distributions, special valuation rules, community property adjustments, a large amount of net investment income, or asset-specific exceptions. Depreciation recapture is particularly sensitive to history: an inherited rental property with years of prior depreciation can produce a very different tax profile from inherited stock, even if both have similar market values.

• The calculator assumes the fair market value at death is the heir’s basis for the main gain calculation.
• Federal capital gains treatment is simplified to the rate assumptions selected in the form.
• State tax is modeled as a flat percentage rather than a full state return.
• Depreciation recapture and NIIT are estimated for planning, not for filing.

Use the output as a decision-support tool. It can show you whether the tax cost of selling appears modest, whether state tax changes the picture, and whether the stepped-up basis may have created meaningful tax savings. For large estates, unusual assets, or any situation involving trusts, business entities, or significant depreciation history, a professional review is still the safest next step.