Selling an Inherited House: Sell Now or Pay 15%?

Marcus, a single filer in Phoenix, Arizona, inherited his mother’s house when she passed in March. She bought it in 1988 for $92,000. By the time she died, comparable homes in the neighborhood were selling for $500,000. Marcus assumed he would owe capital gains tax on the $408,000 of appreciation — roughly $61,000 at the 15% long-term rate. He was wrong by about $61,000.

Because his mother owned the home outright and it passed through her estate, Marcus’s cost basis stepped up to the full $500,000 date-of-death value under IRC §1014(a) — a full step-up that applies to any heir of a solely-owned property, in every state. (The extra community-property break Arizona offers is a separate rule that helps surviving spouses, covered below, not a child inheriting.) When he sold it in November for $508,000, his taxable gain was the difference between the $508,000 sale price and his $500,000 basis — about $8,000 before costs, and after subtracting roughly $30,000 in selling costs it actually left him with a small loss for tax purposes. His federal capital gains tax on the inheritance: $0.

That is the single most important fact about selling an inherited house, and most heirs do not know it. The lifetime appreciation the original owner enjoyed is wiped clean at death. You are taxed only on what happens after you inherit. The real decision — the one that determines whether your tax bill stays near zero or balloons — is what you do with the property: sell now, rent it out, or move in.

The step-up in basis: why your gain is near zero

When you inherit appreciated property, IRC §1014 resets its cost basis to the fair market value (FMV) on the decedent’s date of death. This is the “step-up.” The original purchase price — the “carryover basis” that would apply to a gift — is irrelevant. The clock starts over at the death-date value.

Two terms do the heavy lifting here:

• Basis is your tax cost in the property. Your capital gain is sale price minus basis (minus selling costs). A higher basis means a smaller gain and a smaller tax bill.
• Fair market value is what a willing buyer would pay a willing seller on the date of death — established by a qualified appraisal, not by what the home cost decades ago.

The Joint Committee on Taxation has repeatedly flagged the step-up as one of the largest single tax expenditures in the code precisely because it erases unrealized gains permanently. For a home that appreciated from $92,000 to $500,000, the step-up eliminates $408,000 of gain that would otherwise be taxable if the owner had sold during life. Inherit and sell quickly, and you capture that benefit in full.

One more rule works in your favor: inherited property is automatically treated as long-term regardless of how long you actually hold it (IRC §1223(9)). You could sell the week after you inherit and still get the preferential long-term capital gains rates — 0%, 15%, or 20% — rather than ordinary income rates.

The three paths — and what each costs in tax

Here is how the same $500,000 inherited house plays out under each decision. Assume you are a single filer with $90,000 of other taxable income, putting you in the 15% long-term capital gains band (which starts above $48,350 of taxable income in 2026).

Path 1: Sell now

Selling within roughly a year of death is the cleanest tax outcome. Because your basis is the date-of-death FMV, the only taxable gain is post-death appreciation — and over a few months, that is usually small or negative once you subtract realtor commissions (typically 5–6%), transfer taxes, and closing costs. On a $500,000 home, selling costs alone run $25,000–$35,000, which you add to basis. Sell for $510,000 and your effective basis of ~$530,000 produces a $20,000 capital loss, deductible against other capital gains and up to $3,000 of ordinary income per year.

Path 2: Rent it out

Renting keeps the asset but trades the quick-sale advantage for a long-term tax drag. The moment you place the house in service as a rental, you must depreciate the building portion (not the land) over 27.5 years under IRC §168. On a $500,000 property where the building is, say, $440,000, that is about $16,000 of annual depreciation. Depreciation lowers your taxable rental income now — but every dollar claimed is “recaptured” at sale and taxed at up to 25% under IRC §1250. Rent for 10 years and you could face recapture on ~$160,000, a tax of up to $40,000 that the quick-sell heir never sees.

Path 3: Move in

Moving in unlocks the §121 primary-residence exclusion, but only after you own and use the home as your main home for at least 2 of the 5 years before you sell. Meet that test and you can exclude up to $250,000 of gain if single, or $500,000 if married filing jointly. The exclusion stacks on top of the stepped-up basis. If the inherited home is in a fast-appreciating market and you expect it to climb $200,000 over the next several years, moving in shelters that growth that a renter would pay tax on.

Worked example: the $500,000 date-of-death house

Return to Marcus — single, $90,000 of wage income, Phoenix. His mother’s home: $92,000 cost in 1988, $500,000 date-of-death FMV. Watch how the three paths diverge over time.

*The rental path’s $360,000 gain splits into ~$200,000 of post-death appreciation taxed at 15% (~$30,000) plus $160,000 of depreciation recapture taxed up to 25% (~$40,000). Arizona conforms and taxes the gain as ordinary income at its 2.5% flat rate, adding several thousand more — the only path of the three that hands Marcus a real state bill.

The lesson is not “always sell now.” If Marcus needs a home and the Phoenix market keeps climbing, moving in and using §121 can be the best long-run outcome. But if he just wants the money, selling within the first year extracts $500,000 of value at a federal tax cost of essentially nothing.

Watch the NIIT if your income is high

For most heirs the gain is too small to matter, but if you hold the home long enough to accrue large appreciation — or you have substantial other income — the 3.8% Net Investment Income Tax (IRC §1411) stacks on top of the capital gains rate. It applies to the lesser of your net investment income or the amount your modified adjusted gross income exceeds $200,000 (single) or $250,000 (MFJ). Combined with the 20% top long-term rate, the effective federal ceiling on a large inherited-home gain is 23.8%. A quick sale off the stepped-up basis sidesteps this entirely because there is almost no gain to tax.

Half step-up vs. full step-up: where the house is matters

The size of your step-up depends on how the property was owned and on state law. This is where heirs in community-property states get a quiet windfall.

• Inherited from a sole owner: the entire property gets a full step-up to date-of-death FMV. Marcus’s case — the whole $500,000 basis is his.
• Jointly owned in a common-law state: when one co-owner dies, only the deceased’s half steps up. The survivor keeps their original basis on their half. A surviving spouse who co-owned a $500,000 home that cost $100,000 gets a basis of $300,000 — $250,000 stepped-up half plus $50,000 original on their own half.
• Community property (9 states): Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin grant a full step-up on the entire property when one spouse dies, not just the deceased’s half (IRC §1014(b)(6)). The surviving spouse in those states gets the full $500,000 basis — doubling the break versus a common-law state.

If you are a surviving spouse, the state you live in can swing your basis by hundreds of thousands of dollars. Confirm whether your property qualifies as community property before assuming a half step-up.

How to prove the stepped-up basis to the IRS

The step-up is automatic, but the dollar amount is yours to substantiate. The IRS does not tell you the date-of-death value — you establish it, and you carry the burden if audited. Order the documentation in strength:

1. Retrospective qualified appraisal. A licensed real-estate appraiser values the home as of the date of death. This is the gold standard and well worth the $400–$600 cost. Get it promptly — reconstructing a value years later is far harder.
2. Form 706 valuation. If the estate exceeds the federal estate-tax exemption ($13.99M per person in 2026) and files an estate-tax return, the value reported there fixes your basis.
3. Alternate valuation date. An estate may elect to value assets six months after death under IRC §2032 if doing so lowers estate tax — which also resets your basis to that later value.
4. Comparative market analysis or assessor value. Weaker, but acceptable for modest estates: a realtor’s CMA or the county tax-assessor value near the death date.

Keep whatever you use permanently. You may not sell for a decade, and you will need to prove the basis at that point. A $500 appraisal that supports a $500,000 basis is the cheapest insurance you will ever buy against a six-figure phantom gain.

What most people miss

Three traps cost heirs real money:

• Reporting the original purchase price as basis. The single most expensive mistake. Heirs who put $92,000 on Schedule D instead of $500,000 conjure a phantom $408,000 gain and a ~$61,000 tax bill that does not exist. Always use the date-of-death FMV.
• Letting the appraisal slide. “I’ll deal with it when I sell” means scrambling to reconstruct a value years after the fact. Order the retrospective appraisal in the months after death while comparable sales are fresh.
• Renting “just for a while” without understanding recapture. Heirs who rent the home for a couple of years to “wait out the market” quietly start a depreciation-recapture clock. Even a short rental period converts part of a near-zero-tax sale into a taxable event. If you intend to sell, sell — do not park it as a rental first.

And for co-heirs: each sibling reports only their share. Three siblings inheriting the $500,000 home each take a $166,667 stepped-up basis, and a sale at $510,000 produces about $3,333 of gain apiece — not one combined $10,000 gain on one return. If one sibling buys out the others at FMV, the selling siblings recognize gain only on the spread above their basis, which is typically negligible right after death.

The decision lever

The step-up does the work for you — the only variable you control is time and use. If you want the cash and have no use for the house, sell it within roughly a year while the stepped-up basis still matches the market value, and your federal capital gains tax stays at or near $0. If you want a home in an appreciating market, move in and earn the §121 exclusion on future growth. Renting is the one path that affirmatively adds tax — depreciation recapture — so choose it only if you genuinely want to be a landlord, not as a way to “wait and see.” Pull the date-of-death appraisal first, then pick the path; that one document is what keeps a $500,000 sale tax-free.