Most people assume that inheriting a home means inheriting a tax problem. The reality is that the federal tax code built one of its most favorable provisions specifically for heirs: the step-up in basis. For many families, it turns what looks like a massive capital gain into little or no tax liability at all.
The step-up in basis is not complicated, but understanding it precisely means the difference between making a costly tax mistake and capturing a benefit that was always yours to take.
What step-up in basis actually means
When you buy an asset, your cost basis is what you paid for it. If you sell it later for more than you paid, you owe capital gains tax on the difference. Standard rules.
Inherited assets work differently. Under Section 1014 of the Internal Revenue Code, the cost basis of an inherited asset is reset to its fair market value on the date the original owner died. Not what they paid for it. Not an average of what they paid and what it is worth now. The full current fair market value at the time of death.
This provision is called the step-up in basis because the basis steps up to the current value, erasing all the appreciation that occurred during the original owner’s lifetime.
A concrete example:
Your parent purchased a home in 1985 for $95,000. By the time they passed, the home was worth $420,000. That $325,000 of appreciation happened over 40 years. Under carryover basis rules (what applies to gifts), you would inherit that $95,000 basis and owe capital gains on $325,000 when you sell. Under the step-up in basis rules that apply to inherited property, your basis is $420,000. If you sell for $428,000 and pay $12,000 in selling costs, your net proceeds are $416,000 and your taxable gain is zero.
Why the appraisal at death is critical
The stepped-up basis is equal to the home’s fair market value at the date of death. This value must be documented. Without documentation, the basis is undefined and potentially challengeable.
A formal appraisal conducted by a licensed real estate appraiser as of the date of death is the standard method of establishing the stepped-up basis. This appraisal is typically ordered as part of the estate administration process and is used to:
- Establish the stepped-up basis for capital gains purposes
- Value the asset for estate tax purposes (if the estate is large enough to owe estate tax)
- Support the personal representative’s inventory filing with the probate court
If an appraisal was not done at the time of death, it can sometimes be done retroactively through a “retrospective” appraisal that uses comparable sales data from around the date of death. This is less clean than a contemporaneous appraisal and may be scrutinized by the IRS if challenged.
Bottom line: If you are the executor or personal representative, order a date-of-death appraisal as early as possible. If you are an heir and the appraisal was not done, ask whether one can still be commissioned and how solid the resulting number would be.
What the step-up does not cover
The step-up in basis is powerful, but it has limits:
Post-inheritance appreciation. The step-up only addresses the appreciation that occurred before the date of death. Any increase in value from the date you inherited forward is fully taxable when you sell.
| Period | Appreciation | Taxable? |
|---|---|---|
| During original owner’s lifetime | $325,000 | No, eliminated by step-up |
| From date of death to your sale date | $45,000 | Yes, at long-term capital gains rates |
Rental property depreciation. If you rent out the inherited home and claim depreciation deductions, those deductions reduce your basis below the stepped-up amount over time. When you sell, the IRS recaptures depreciation at a rate of up to 25% federally. This is called depreciation recapture and it applies even if the sale price is below what you originally inherited the home for.
Gifts are different. If the original owner gave you the property during their lifetime rather than leaving it to you at death, you receive carryover basis, not stepped-up basis. The distinction matters enormously for appreciated property. Receiving a gift of a home worth $420,000 that was bought for $95,000 means you inherit a $95,000 basis and would owe capital gains on $325,000 when you sell (less selling costs). Inheriting the same home at death means a $420,000 basis and potentially zero taxable gain.
The alternate valuation date
In certain circumstances, the estate can elect to value its assets as of 6 months after the date of death rather than on the date of death itself. This is called the alternate valuation date election.
The alternate date can only be elected if it reduces both the gross estate value and the estate tax owed. It is typically used when asset values declined significantly in the months after death (market downturn, for example).
If the alternate date is elected and the home’s value was lower 6 months after death, the stepped-up basis is lower. A lower basis means a larger potential gain when you eventually sell. Understanding which date the estate used is important for your capital gains planning.
Ask the estate attorney or executor which valuation date was used and make sure the basis documented in your records reflects that date.
How capital gains are calculated with the stepped-up basis
The calculation is straightforward once you have all the numbers:
Step 1: Identify your stepped-up basis. This is the appraised fair market value at the date of death (or alternate valuation date if elected).
Step 2: Add capital improvements you made after inheriting. Renovations that increase the home’s value, documented with receipts, add to your basis.
Step 3: Calculate your net sale proceeds. Take the gross sale price and subtract commissions, title fees, transfer taxes, and other closing costs paid by the seller. The result is your net proceeds.
Step 4: Calculate the gain. Subtract your adjusted basis (Step 1 plus Step 2) from your net proceeds (Step 3). If the result is positive, that is your taxable gain. If it is zero or negative, you owe no capital gains.
Step 5: Apply the appropriate rate. Inherited property gains are always long-term. Federal long-term rates are 0%, 15%, or 20% depending on your taxable income. State rates vary separately.
Use our net proceeds calculator to run your own numbers before you make a decision.
Step-up in basis vs. the primary residence exclusion
These are two separate tax benefits that can stack together:
| Benefit | What it covers | Who qualifies |
|---|---|---|
| Step-up in basis | All pre-death appreciation | All heirs automatically |
| Primary residence exclusion (Section 121) | Up to $250,000 or $500,000 of post-inheritance gains | Heirs who move in and live there 2 of 5 years before selling |
If you move into the inherited home and live there for at least 2 of the 5 years before selling, you may be able to exclude a significant additional amount of gain on top of the step-up benefit. This is the “2-year rule” commonly referenced in discussions of inherited property taxes.
Not every heir can or wants to move in, but for those who can, the combination of the two benefits can protect a very large amount of appreciation from capital gains entirely.
The bottom line
The step-up in basis is automatic, powerful, and the single most important tax concept for anyone inheriting real estate. It resets your starting point to the home’s value at the date of death, eliminating all pre-death appreciation from your taxable gain. Heirs who sell quickly and near the appraised value often owe nothing in federal capital gains.
The actions that matter: document the stepped-up basis with a formal appraisal, track capital improvements from the day you inherit, and consult a CPA before you sign anything.
When you are ready to sell, cash home buyers purchase inherited homes as-is with no repairs or commissions, and close within days of title clearing. Visit our inherited house situation page to learn more, or get a no-obligation offer to see what your inherited property is worth today.
