How inherited real estate is taxed under federal law, why the step-up matters, and how a date-of-death appraisal protects you.
Under IRC §1014, when a property owner dies, the tax basis of their real estate resets to its fair market value on the date of death. This “step-up” replaces the original purchase price and can eliminate decades of capital gains tax for the heirs.
The “basis” of a property is its value for tax purposes — generally the original purchase price, adjusted for capital improvements and depreciation. When the property is sold, the owner pays capital gains tax on the difference between the sale price and the basis.
When property is inherited, the basis resets to the fair market value on the date of the owner’s death. All appreciation that occurred during the decedent’s lifetime is permanently erased from the tax calculation.
The IRS also treats inherited property as a long-term capital asset regardless of how long the heir actually holds it. Even if the property is sold weeks after the date of death, any gain is taxed at the favorable long-term capital gains rate — not the higher ordinary income rate.
Federal tax law draws a sharp line between property gifted during an owner’s lifetime and property inherited at death. The financial consequences are dramatic.
When property is gifted during the owner’s lifetime (an “inter vivos transfer”), the recipient takes the donor’s original cost basis. If a parent bought a home for $100,000 and gifts it to a child when it’s worth $1,000,000, the child’s basis is still $100,000. Selling the property exposes the child to capital gains tax on $900,000 of appreciation.
If the parent holds the property until death, the child inherits it with a basis of $1,000,000 — the fair market value on the date of death. If the child sells the property for $1,000,000, the taxable gain is zero. The entire $900,000 of lifetime appreciation is legally eliminated.
The IRS maintains an exception under IRC §1014(e) to prevent gaming the step-up. If appreciated property is gifted to a person who dies within one year, and that property passes back to the original donor or their spouse, the step-up is denied. The basis reverts to what it was before the gift. This prevents the strategy of temporarily transferring appreciated assets to a terminally ill person to wash away the capital gains.
In California and eight other community property states, married couples receive one of the most powerful wealth-preservation benefits in the tax code.
In the 41 common law states, when one spouse dies, only the decedent’s 50% share of jointly owned property receives the step-up. The surviving spouse’s half retains its original basis, leaving them partially exposed to capital gains.
In California and the other community property states (Arizona, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin), the entire value of community property — both halves — receives a full step-up to the date-of-death fair market value. This “double step-up” can eliminate all capital gains on the property if the surviving spouse sells.
For surviving spouses in California, obtaining a date-of-death appraisal immediately after the first spouse’s death is essential. It secures the double step-up and protects the surviving spouse’s financial position if they later need to sell or downsize.
The step-up in basis provides a second financial benefit beyond capital gains elimination — one that many heirs don’t know about.
When heirs convert an inherited home to a rental property, the stepped-up basis determines the depreciation schedule. Because the basis has reset to the current fair market value, the heir can calculate annual depreciation deductions on this much higher figure rather than the decedent’s fully depreciated original cost.
Higher depreciation deductions mean lower taxable rental income each year — a substantial ongoing tax benefit for heirs who choose to retain the property as an investment rather than selling.
This dual benefit — capital gains elimination upon sale and enhanced depreciation upon retention — underscores the financial importance of documenting the date-of-death value with a qualified appraisal.
The step-up in basis is available to virtually all heirs, but the documentation requirement falls on different parties depending on the situation.
Most estates fall below the federal estate tax exemption and do not file a federal estate tax return. The burden of proving the stepped-up basis falls entirely on the heir. When the property is eventually sold, the date-of-death appraisal is the sole documentation supporting the basis claimed on the tax return.
High-net-worth estates exceeding the federal exemption (approximately $13 million) must file Form 706 with the IRS. Date-of-death appraisals are submitted to justify the property values that constitute the gross estate. Because the estate tax rate is approximately 40%, accurate valuations are critical.
Successor trustees have a fiduciary duty to accurately account for trust assets upon the grantor’s death. Probate courts typically require an inventory and appraisal of all estate assets. The date-of-death appraisal satisfies both requirements.
When multiple heirs inherit a single property and one wishes to buy out the others, the date-of-death appraisal provides an objective, third-party valuation. This facilitates equitable distribution, satisfies fiduciary duties, and prevents disputes among beneficiaries.
Understanding how the date-of-death value flows through the federal tax system helps explain why the appraisal is so important.
Estates above the federal exemption file Form 706 (Estate Tax Return) with the date-of-death appraisals attached. Under IRC §6035, the executor must also file Form 8971, which reports each beneficiary’s inherited basis to both the IRS and the beneficiary. This creates an unbreakable paper trail — the heir’s future claimed basis cannot exceed the value reported on the estate tax return. These basis consistency rules were enacted to prevent the old practice of claiming low values for estate tax purposes and high values for capital gains purposes.
For the vast majority of estates that do not trigger Form 706, no federal filing officially establishes the property’s date-of-death value. When the heir eventually sells the property, the title company issues a Form 1099-S to the IRS reporting the sale proceeds. The heir then reports the sale on Form 8949 and Schedule D, entering their stepped-up cost basis.
Because no estate tax return exists to back up this number, the privately secured date-of-death appraisal is the sole documentation supporting the basis. Without it, the IRS can challenge and deny the claimed step-up.
The IRS does not take stepped-up basis claims on faith. Understanding the audit risk makes the case for ordering an appraisal clear.
When inherited property is sold, the title company reports the gross sale proceeds to the IRS on a Form 1099-S. If the heir claims a stepped-up basis on Form 8949 that nearly offsets those proceeds — resulting in little or no capital gains — but the IRS has no documentation supporting that elevated basis, an automated correspondence audit (CP2000 notice) can be generated.
If the heir cannot produce a qualified, USPAP-compliant date-of-death appraisal to substantiate the claimed basis, the IRS has the authority to deny the step-up entirely. The result is capital gains tax assessed on the full historical appreciation, accuracy-related penalties of 20% of the underpayment, and compounding interest.
For high-net-worth estates filing Form 706, the IRS audits estate returns at elevated rates, focusing specifically on undervalued assets. The IRS retains its own internal appraisers who can challenge unsupported valuations, questionable adjustments, or the use of non-comparable sales.
The IRS does not accept informal opinions of value. Under 26 CFR §1.170A-17, a “qualified appraiser” must have professional coursework in valuing the asset class, at least two years of relevant experience or a recognized appraisal designation, and independence from the estate.
The appraisal must be USPAP-compliant, include a signed declaration, and use a flat fee — contingency fees tied to the appraised value are prohibited because they create an incentive to inflate the valuation. Automated estimates (Zillow, Redfin), Broker Price Opinions, and opinions from unlicensed individuals do not meet these standards and will not protect you in an audit.
For California properties inherited after February 15, 2021, Proposition 19 adds a second layer of financial consequences beyond the federal step-up.
Prop 19 eliminated the reassessment exclusion for all inherited property that is not the transferor’s primary residence. Inherited rental properties, second homes, and commercial buildings are now reassessed at 100% of their current fair market value on the date of death. For properties held under Proposition 13 for decades, this routinely results in property tax increases of 500% to 1,000%.
Even for the family home, Prop 19 imposes strict conditions. The inheriting child must establish the property as their own primary residence within one year. The exclusion is capped at the prior assessed value plus approximately $1,044,586 (adjusted biennially). If the date-of-death market value exceeds this threshold, the excess triggers a partial property tax reassessment.
Because the date-of-death appraisal directly determines both the step-up in basis (for federal capital gains) and the reassessment calculation (for California property taxes), the accuracy of the valuation has financial consequences on two fronts.