Updated July 30, 2026. Quick answer (2026): An inherited home takes a basis stepped up to date-of-death fair market value, which is why most inherited-home sales produce little or no taxable gain. Section 121 usually does not apply and usually does not need to.
An inherited house is rarely the only thing inherited.
The step-up usually settles the tax on the house. What is left is an estate to unwind. The matching service below introduces you to advisers who pay to meet you.
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Why most inherited-home sales produce almost no taxable gain
An inherited home does not carry the decedent’s basis. It takes a basis stepped up to fair market value at the date of death. A house bought in 1978 for $52,000 and worth $610,000 when the owner died has a basis of $610,000 in the heir’s hands. Sell it a few months later for $625,000 with $37,500 of selling costs and the amount realized is $587,500 — a loss of $22,500 against that stepped-up basis, not a $573,000 gain.
Section 121 is usually irrelevant here, and that is the point
Heirs reach for the $250,000 exclusion because it is the rule they have heard of. It generally does not apply: the exclusion requires the property to have been the taxpayer’s principal residence for two of the last five years, and an heir who never lived there fails that test outright. It does not matter, because the step-up has already done more work than the exclusion would have. The exclusion only re-enters the picture if the heir moves in and lives there long enough to satisfy 121(a) in their own right.
What actually creates a taxable gain on an inherited home
Two things. Time — appreciation between the date of death and the date of sale is real gain, which is why estates that sit unsold for years can owe. And rental use — if the heir rents the property out before selling, depreciation accrues and comes back at up to 25 percent under Section 121(d)(6) and the unrecaptured Section 1250 rules, whether or not the exclusion was ever available.
Getting the date-of-death value right is the whole ballgame
Basis is whatever the property was worth on that date, and that figure is the single largest determinant of the tax. A contemporaneous appraisal is worth far more than a later reconstruction, and a Zillow estimate pulled three years afterwards is not evidence.
Related
Methodology
- Exclusion caps, the 2-of-5 test, the nonqualified-use allocation, the reduced-exclusion fraction and the depreciation carve-out are taken from the text of 26 U.S.C. 121. The 3.8 percent rate and its thresholds are from 26 U.S.C. 1411. Both were read on 2026-07-30.
- Section 121 caps and Section 1411 thresholds are written in the statute as fixed dollar amounts with no indexing mechanism, so they are built in. Long-term capital gain brackets ARE indexed annually, so your rate is an input rather than a lookup.
- Figures were computed by two independently written engines that agree to the cent, and the calculator on this page reproduces both exactly.
- Federal only. State treatment varies and some states do not follow the federal exclusion.
Educational estimate, not tax advice, and not a filed return. Federal only. Confirm anything that changes a filing decision with a CPA or tax attorney.
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Selling to a sibling instead of the market? The buyout has its own arithmetic — the sibling buyout calculator computes each seller’s gain and the buyer’s blended basis, and a non-pro-rata distribution can sometimes do the whole thing with no sale at all.