Stepped-Up Basis on Inherited Assets

A stepped-up basis is a tax benefit in which inherited property is valued at its fair market value as of the date of the owner’s death, allowing heirs to avoid capital gains tax on appreciation that accrued during the deceased owner’s lifetime.

The Mechanics: Cost Basis at Death

Under ordinary tax basis rules, when you inherit an asset, you do not inherit its original cost basis. Instead, the basis “steps up” (or “steps down,” if the asset declined in value) to the fair market value on the date the deceased owner died.

Here is a concrete example. Suppose your grandmother bought Apple stock in 1985 for $500. By 2026, that stock is worth $150,000. Your grandmother passes away and leaves you the stock. In the eyes of the IRS:

• Your cost basis in the stock = $150,000 (the date-of-death value).
• If you sell the stock the next day at $151,000, your capital gain = $1,000.
• You owe tax only on that $1,000 of post-inheritance appreciation, not on the $149,500 of pre-death gain.

This is transformative. Without stepped-up basis, your grandmother’s heirs would owe long-term capital gains tax on the full $149,500 appreciation when they sold the stock. That would be a tax bill of roughly $22,400 (at 15% federal rate) before any state taxes. With stepped-up basis, the gain is zero (until sale).

Why Stepped-Up Basis Exists

Stepped-up basis was enacted partly for administrative simplicity: the IRS did not want to track the original basis of assets across generations and across decades. The tax code found it simpler to reset basis at death and value assets once, via the estate tax valuation process.

But the practical effect is a massive tax deferral—or elimination—of capital gains tax on inherited wealth. This has made stepped-up basis one of the most valuable tax benefits for high-net-worth families.

Real Estate Example

Stepped-up basis matters most for assets that have appreciated significantly and will be held long-term.

Suppose you and a sibling inherit a commercial building from your parents. Your parents bought it in 1998 for $2 million. Its fair market value on the date of death is $8 million. You and your sibling each inherit 50%, so your basis in your half = $4 million (the fair market value of your half on death date).

If you own the building for five more years and then sell your half for $5 million, your capital gain = $1 million, and you owe long-term capital gains tax only on that $1 million. You pay zero tax on the $4 million of pre-death appreciation your parents’ side of the family realized.

Without stepped-up basis, your basis would have been half of $2 million = $1 million, and your gain on sale would have been $4 million, leading to a much larger tax bill.

Does Stepped-Up Basis Apply to All Assets?

No. The rules have important exceptions.

Most assets get stepped-up basis:

• Publicly traded stocks and bonds.
• Real estate (residential, commercial, investment).
• Collectibles (art, jewelry, antiques).
• Business interests and partnership units.
• Bank accounts and cash (though no step-up is needed; basis is zero regardless).

Key exceptions (no stepped-up basis):

• Traditional IRA and 401(k) plans: Distributions are taxed as ordinary income, not capital gains. The stepped-up basis rule does NOT apply. If your grandmother leaves a $500,000 traditional IRA to you, you owe income tax on withdrawals as if you had earned that money.
• S Corporation stock: Limited; basis steps up but built-in gain liability may apply.
• Depreciated property: If the basis steps down (because the asset is worth less than the original cost), the stepped-down basis applies.

Timing: The Valuation Date

The step-up in basis uses the fair market value determined for estate tax purposes. Generally, this is the date of death. However, executors can elect to use the “alternate valuation date,” which is six months after death, if the estate is subject to federal estate tax and the alternate date results in a lower valuation.

This choice is rare for estates below the federal estate tax exemption (which is very high in recent years), but for large estates, the alternate valuation date can provide a further reduction in taxable gain if asset values have declined.

Inherited Retirement Accounts and the Stretch IRA Trap

One of the most painful interactions occurs with inherited retirement accounts. Suppose your grandmother has a traditional IRA worth $1 million at death. The IRA does NOT receive stepped-up basis. Her beneficiaries must withdraw funds and pay ordinary income tax on those withdrawals.

The 2019 SECURE Act eliminated the “stretch IRA” option (under which beneficiaries could take distributions over their lifetime). Now, most inherited IRAs must be emptied within ten years, accelerating the income tax bill.

This illustrates the value of stepped-up basis by contrast: appreciated stocks in a taxable account, left to the same heirs, would trigger zero capital gains tax at inheritance.

The Future: Potential Limits to Stepped-Up Basis

Stepped-up basis is expensive to the federal government in foregone tax revenue. Several administrations have proposed limiting or eliminating it for very large estates. One proposal would require heirs to recognize gains over a certain dollar threshold at death; another would eliminate stepped-up basis entirely for billionaires.

As of 2026, stepped-up basis remains in full effect for all taxpayers. But the provision is not permanent and could change if lawmakers choose to pay for other tax cuts or spending by constraining wealth transfer benefits.

For planning purposes, families with substantial appreciated assets should consider whether stepped-up basis will remain available in the future, and whether lifetime gifts (which do NOT receive stepped-up basis, a key disadvantage) might be preferable in some cases.

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