The Inherited House: Step-Up in Basis, Then What?

How Does the Step-Up in Basis Work?

When you inherit property, your cost basis resets to its fair market value on the owner's date of death. A house your parents bought for $90,000 that's worth $650,000 when they pass gives you a $650,000 basis. Sell it for $660,000 six months later and your taxable gain is $10,000 — not $570,000. The lifetime of appreciation is simply never taxed.

Two mechanics matter. First, document the date-of-death value — a professional appraisal, ordered promptly, is the record that defends your basis years later. Second, the executor can elect an alternate valuation date six months after death for the whole estate, but only when it reduces both the estate's value and estate tax due — with the exemption at $15 million in 2026, that election is rarely in play for most families.

Community property adds an Arizona-relevant wrinkle for surviving spouses: property held as community property generally receives a full step-up on both halves at the first death, not just the deceased spouse's half. Titling decisions made decades ago quietly determine the tax outcome now.

Should I Sell, Keep, or Rent the Inherited House?

Strip the sentiment out for one exercise and ask: if I were handed the cash value of this house today, would I buy this exact property as an investment? That's what keeping it means.

Selling soon after death is the cleanest path: the stepped-up basis means little or no capital gains tax, and the proceeds can be redeployed into a diversified portfolio matched to your actual goals.

Renting converts a tax-free liquidity event into a business. It can work when the numbers work — but understand what you're trading: depreciation deductions taken along the way are recaptured at sale, appreciation after death is fully taxable, and you've taken on tenant, maintenance, and concentration risk in a single asset. Holding an empty house “to decide later” is the worst of both: carrying costs with no income while the decision ages.

Moving in resets the frame entirely — it becomes a housing decision, and future gains above your stepped-up basis can eventually qualify for the primary-residence exclusion once you meet the ownership and use tests.

What About Multiple Heirs and Out-of-State Property?

Siblings inheriting a house together is where good estates go sideways. One wants to sell, one wants to rent, one wants to live there. Decide early, in writing, with a buyout formula — the step-up gives every heir a low-tax exit at the start; a forced sale three contentious years later gives nobody one.

Geography matters too. Arizona has no estate or inheritance tax, but that protection stops at the state line: an Arizona family inheriting a house in a state with its own estate tax, or an heir living in an inheritance-tax state, can owe state-level tax the federal rules never touch. Out-of-state property also usually means ancillary probate in that state — a reason many families title such property in a revocable trust before it's ever inherited.