Glossary term
Step-Down in Basis
A step-down in basis occurs when inherited property's tax basis resets downward to fair market value because the property is worth less at death than its prior basis.
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What Is a Step-Down in Basis?
A step-down in basis occurs when inherited property's tax basis resets downward to fair market value because the property is worth less at the owner's death than its prior basis. People often discuss inherited assets in terms of a step-up in basis, but the same fair-market-value reset can move basis down when an asset has declined.
Basis matters because it helps determine taxable gain or loss when property is sold. If an asset had a $500,000 basis before death but is worth $400,000 at death, the heir's basis may be $400,000. The unrealized loss does not simply transfer to the heir.
Key Takeaways
- A step-down in basis is the downward fair-market-value reset for inherited property.
- It can eliminate a built-in loss that existed before death.
- The rule is part of the same inherited-property basis framework that can create a step-up.
- It can affect whether selling before or after death preserves a tax loss.
- Estate planning should consider depreciated assets as well as highly appreciated assets.
How It Works
Under inherited-property basis rules, the basis of property acquired from a decedent is generally tied to its fair market value at the relevant valuation date. When the fair market value is higher than the decedent's basis, people call the result a step-up. When fair market value is lower, the result is a step-down.
The reset can be favorable for appreciated property and unfavorable for loss property. It can wipe away unrealized gain, but it can also wipe away unrealized loss. That asymmetry is important in estate and income-tax planning.
Example
Assume an investor bought publicly traded stock for $100,000. At death, the shares are worth $65,000. If the heir receives the stock with a basis equal to the date-of-death value, the heir's basis is $65,000. If the heir later sells the stock for $70,000, the heir generally has a $5,000 gain, not a $30,000 loss measured from the original $100,000 purchase price.
If the original owner had sold the stock before death, the owner might have recognized the capital loss, subject to tax rules and limits. That is why loss assets can require a different planning conversation from appreciated assets.
Step-Up Versus Step-Down
Asset condition at death | Basis result | Planning consequence |
|---|---|---|
Fair market value above prior basis | Step-up | Built-in gain may be reduced or eliminated. |
Fair market value below prior basis | Step-down | Built-in loss may be reduced or eliminated. |
Fair market value near prior basis | Little change | Basis reset may have limited tax effect. |
Where It Shows Up
Step-down issues can appear with concentrated stock positions, real estate purchased near a market peak, private business interests, collectibles, partnership interests, and depreciated investment assets. The issue is easy to miss because many estate-planning conversations focus on avoiding capital gains from appreciated assets.
For families, the practical question is whether a loss should be harvested before death, held for non-tax reasons, donated, or handled in another way. Tax is not the only factor; liquidity, investment quality, transaction costs, health, family goals, and state law all matter.
What to Watch
Valuation matters. Public securities are generally easier to value than real estate, private companies, or collectibles. Estates may also use an alternate valuation date in certain circumstances, which can affect basis and estate-tax reporting. Documentation should support the value used.
Community property, joint ownership, trusts, and special tax elections can change the analysis. A step-down is a simple label, but the basis result depends on how the property was owned and how it passes at death.
The Bottom Line
A step-down in basis is the unfavorable side of the inherited-property basis reset. It can erase a built-in loss when property passes at death, so depreciated assets deserve as much planning attention as appreciated assets.