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Step-Up in Basis

step-up in ba·sis

Also called Basis Step-Up, Stepped-Up Basis

Short Definition

The tax rule that generally resets an inherited asset’s cost basis to its value at the date of death, rather than what the original owner paid. It is usually the single biggest reason inherited property owes little capital gains tax.

In a Sale

What This Means When the House Is Being Sold

This is the piece of tax law that makes selling inherited property far less costly than families often fear going in. A house purchased decades ago for a fraction of its current value generally does not carry that original low basis forward to the heirs. Instead, basis resets to the value at the date of death, meaning a sale reasonably soon after death, at or near that same value, frequently produces little to no taxable gain at all.

The word usually matters here more than it might seem. Community property held between spouses can receive different, sometimes more favorable treatment than separate property, and the specific rules can vary depending on how title was held.

Waiting to sell erodes this benefit rather than preserving it, since any appreciation after the date of death is ordinary taxable gain measured from that reset basis forward.

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Not to Be Confused With

What Tells Them Apart

Step-Up in Basis is the rule or mechanism itself. Cost Basis is the resulting number that rule produces, the figure gain is measured against going forward. Date of Death Value is typically what establishes that new basis figure, usually through an appraisal. Capital Gains Tax is what ultimately gets calculated using the stepped-up basis once the property sells.

Questions

Questions People Ask

Why does inherited property often owe little capital gains tax when sold?

Because its cost basis generally resets to the property's fair market value at the date of death rather than carrying forward what the original owner paid, often decades earlier at a much lower price. A sale reasonably close to that date, at a similar value, frequently produces little or no taxable gain as a result.

Does step-up in basis apply the same way to property held jointly by spouses?

Not always identically. Community property can receive different, sometimes more favorable basis treatment than separate property when one spouse dies, and the rules depend on how title was actually held. A tax advisor should confirm how this applies to a specific property before a sale is planned around assumptions.

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