Step-up in basis is the single biggest tax advantage in U.S. real estate inheritance, and most heirs don’t realize they’re sitting on it until a CPA explains it after the fact. Here’s how it actually works, where the traps are, and what it means in dollars.
The basic rule
Under IRC Section 1014, when someone dies owning appreciated property — including real estate — the person who inherits it generally gets a new cost basis equal to the property’s fair market value on the date of death (or, if the estate elects it, an alternate valuation date six months later). This is different from a gift: if your parent gifts you a house while alive, you inherit their original (usually much lower) basis. If you inherit it after they die, the basis resets to current market value.
Why that matters in real dollars
Say a parent bought a rental property decades ago for around $80,000. It’s worth around $450,000 at the time of death. Without step-up, selling it would trigger capital gains tax on roughly $370,000 of appreciation. With step-up, the heir’s basis becomes around $450,000 — so if they sell shortly after inheriting, at close to that value, there’s little to no capital gains tax owed at all. That gap is often five or six figures in avoided tax, on a single property.
The community property double step-up
This is the detail most people miss. In community property states (Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin, plus opt-in Alaska), when one spouse dies, the surviving spouse gets a step-up in basis on the entire property — not just the deceased spouse’s half. In a common-law state, joint tenancy or tenancy-by-the-entirety property only steps up the deceased spouse’s 50% share, leaving the survivor’s original basis on their half. For a long-held, heavily appreciated property, that difference alone can be worth planning around — it’s part of why some couples look at moving assets into community property before one spouse’s health declines, though that’s a decision to make with an estate attorney, not from a blog post.
Depreciation recapture also resets
If the property was a rental, the original owner’s accumulated depreciation deductions don’t carry over to the heir either. The heir’s basis for future depreciation starts fresh at the stepped-up value, and — critically — the depreciation recapture tax (normally owed on the gain attributable to depreciation already claimed) generally doesn’t apply to the heir on inherited property. This is a second, separate benefit stacked on top of the capital gains reset.
What heirs need to do at the time of inheritance
| Step | Why it matters |
|---|---|
| Get a qualified appraisal as close to the date of death as possible | This sets your new basis — without documentation, the IRS can challenge whatever value you later claim |
| Check for a Form 8971 / Schedule A from the estate | Estates required to file Form 706 must report the basis of inherited assets to both the IRS and the heir — use that reported value as your basis, the IRS now cross-checks it |
| Keep records of the original owner’s basis too | You’ll need it if any alternate valuation election or partial step-up (common-law joint tenancy) applies |
| Don’t rush a sale before the appraisal is finalized | Selling before you’ve established the stepped-up value on paper makes it harder to defend that basis if audited |
FAQ
Does step-up in basis apply to a house with a mortgage still on it? Yes — the mortgage balance is a separate liability from basis. The heir’s basis is the stepped-up fair market value regardless of what’s still owed on the loan.
What if I inherit the property but don’t sell it right away? The stepped-up basis still applies going forward — it’s locked in at the date of death value, not the date you eventually sell. If the property appreciates further after you inherit it, you’ll owe capital gains only on the appreciation that happens after that point.
Could step-up in basis be repealed or limited? It’s been proposed in federal tax reform discussions before, generally aimed at high-value estates. Nothing has changed the core rule as of now, but anyone doing serious estate planning around this should confirm current law with a CPA or estate attorney rather than relying on a general article, since this is exactly the kind of provision that gets revisited in tax legislation.
Verdict
Step-up in basis is the reason inherited real estate is almost always better sold by the heir than gifted while the original owner is alive, tax-wise. The two things that actually protect the benefit are getting a proper date-of-death appraisal and knowing whether you’re in a community-property or common-law state before you assume the whole property stepped up. Skip either step and you’re negotiating with the IRS from a weaker position than you need to be in.
