Step-Up in Basis at Death: How the Reset Works

Step-Up in Basis at Death: The Answer Up Front

Under the tax code, an heir's basis in inherited assets resets to market value when the owner dies. Stock purchased years ago for $100,000 but worth $800,000 at death hands the heirs an $800,000 basis.

Selling the next day produces essentially zero taxable gain for the estate or heirs. The clock on appreciation effectively stops that day.

This reset is what people mean by the step-up in basis; it quietly erases a lifetime of unrealized appreciation. Congress grants it under Section 1014, and it covers almost everything an estate holds.

Brokerage accounts, a family cabin, and rental property all qualify. A handful of assets are excluded, and those exceptions matter enormously for planning.

How the Reset Mechanically Works

The executor or the family establishes fair market value for every asset, priced on the death date. Most brokerages produce date-of-death statements on request within a few weeks of being asked.

Ask early, because paperwork stalls happen at the worst times. Real estate deserves a formal appraisal, because that number becomes the basis for every future calculation.

Estates facing estate tax may elect an alternate valuation six months after death.

Whatever value the election fixes becomes the heirs' basis going forward.

Most estates below the filing threshold simply use the date-of-death figure. The federal estate exemption stands at $15 million per person in 2026 under current law.

The holding period resets alongside the basis without any action required.

Every inherited asset is automatically long-term in the heir's hands, no matter how briefly they hold it before selling.

That quirk spares heirs from short-term rates on immediate sales.

The guide to inherited property taxes works through the rules with full examples.

The Assets That Never Step Up

Income in respect of a decedent, or IRD, is the exception that catches families by surprise. Untaxed income the deceased earned but never received keeps its taxable character.

Traditional IRAs, 401(k)s, pensions, annuities, and deferred savings bond interest all live in this bucket.

A $500,000 traditional IRA inherits exactly its tax deferral, not a fresh basis. Heirs who withdraw it owe ordinary income tax on every distribution they take. Confusing the two buckets leads heirs to expect a tax-free withdrawal and meet a painful surprise in April.

Roth accounts sit at the opposite pole of the entire classification system for inherited assets.

They were already tax-free, so the step-up question never arises at all.

Installment sale notes and certain deferred compensation plans join the IRD list as well.

Sorting the estate into step-up and IRD buckets is the first move for any executor.

Marriage, Joint Titling, and State Differences

How assets are titled decides how much of a joint portfolio actually steps up. Common-law treatment resets the basis on just the deceased spouse's portion of any jointly owned assets. The surviving spouse keeps original basis on their own half and on separately titled assets.

Community property states play by different rules entirely. At the first death, both halves of community property reset to market value, including the survivor's share.

Nine states plus Alaska's opt-in regime grant this full reset. The community property step-up guide details the mechanics.

The difference is worth real money on any large portfolio. A $1 million portfolio with $200,000 of basis gives a $600,000 new basis under common-law rules.

The same portfolio in a community property state gets a full $1 million basis. Survivors in common-law states sometimes retitle deliberately during life to engineer the better outcome.

Gifts Do Not Get the Same Treatment

Carryover basis is the standing rule for lifetime gifts of appreciated property. Give your daughter the same $100,000-basis stock now worth $800,000 and she receives your basis. The gain waits for her sale instead of vanishing at the transfer.

This asymmetry drives the classic advice about what to give and what to hold. Hold appreciating assets until death, and give away assets that have fallen in value. A donor who gifts winners forfeits the step-up forever, since the reset only triggers at death.

The contrast also shapes end-of-life selling decisions for terminal illness situations. Rushing to sell appreciated stock in the final months of life can trigger gain the estate would erase weeks later. Families facing that situation should weigh the calendar carefully, with the basis rules in IRS Publication 551 as the reference.

Worked Example: One Portfolio, Three Timelines

Consider stock with a $150,000 basis now worth $900,000, held by a widower in a common-law state. If he sells during life, the gain is $750,000 at long-term rates.

NIIT stacks on top for earners above the $200,000 MAGI line. The bill can approach $150,000 depending on his other income that year.

If he dies holding the position, his heirs receive a $900,000 basis instead. An immediate sale after death realizes nearly nothing, and the estate erased $750,000 of gain through the calendar alone. If he gifts the stock instead, his daughter inherits the $150,000 basis and the gain follows her.

Three decisions produce three wildly different tax outcomes on identical property. That spread is why basis planning belongs in every serious estate conversation.

The Documentation Burden Falls on Heirs

Brokers do not automatically know date-of-death values for the accounts they hold. Inherited accounts often arrive with the decedent's old basis still attached. The first 1099-B after inheritance can report wildly wrong basis figures to the IRS.

Heirs must supply the estate valuation and correct the broker's record themselves. Real estate compounds the problem, since county records carry the purchase price from decades ago.

Without an appraisal, heirs guess, and guessing wrong costs either tax dollars or audit exposure. For inherited lots, our cost basis methods walkthrough explains how they get identified and reported.

Executors should gather date-of-death statements, appraisals, and any estate tax return that was filed. Those documents settle basis disputes for decades afterward. The spouse death guide covers the surviving-spouse side of these rules.

What the Step-Up Means for Planning

The reset changes the calculus on holding versus selling for older investors. A retiree planning a large gift may preserve more family wealth by holding appreciated assets instead. Spending from basis-heavy accounts during life and leaving the winners to heirs inverts the usual drawdown logic.

The strategy interacts with charitable planning in ways worth comparing directly. Donating appreciated stock during life captures a deduction and avoids the gain immediately.

Heirs, by contrast, could have the gain erased entirely at death. Which route wins depends on rates, income needs, and the family timeline.

Broader techniques sit in the roundup of legal avoidance strategies on this site. Start with the IRS estate tax pages and Publication 551 for the official rules. Few breaks in the code reward careful documentation like this one does.

Valuation Rules in Special Situations

Thinly traded stocks and private company shares resist easy date-of-death pricing. Appraisers use comparable sales, discounted cash flows, or book value adjustments.

The estate should document the method before heirs need the number. A defensible valuation file prevents years of basis disputes later.

Cryptocurrency introduces its own documentation wrinkles at death. Exchanges may not issue date-of-death statements without specific requests.

The executor should export transaction history and capture exchange prices at the date and time of death. The crypto capital gains rules apply normally after the reset.

Business interests demand the most valuation care of any asset class in an estate. Operating agreements often restrict transfers and define buyout pricing at death.

The contractual buy-sell price and the tax basis can diverge by a wide margin. Coordination between the appraiser and the attorney protects both numbers.

Inheritances Passing Through Trusts

Assets passing through testamentary trusts receive the same step-up treatment at death. The trust takes date-of-death basis just like an individual heir would.

Distributions from the trust carry that basis out to beneficiaries over time. The trust's accounting tracks that basis separately from the trust's own taxable income.

Bypass trusts and marital trusts layer extra planning on the same rules. Assets qualifying for the marital deduction still receive a step-up at the first death.

Assets in a bypass trust avoid a second step-up at the survivor's death. The tradeoffs depend on estate size and the exemption in force.

Timing Decisions for Heirs Who Inherit

Heirs gain genuine flexibility the moment the step-up process completes. A position inherited with a fresh basis can be sold immediately with little tax.

It can also be held for years and sold against future gains with the same clean start. The reset removes the embedded-gain clock that constrained the deceased.

An immediate sale makes sense when the position no longer fits the heir's own plan. Concentrated stock from a parent's employer is the classic example.

Diversifying right after death costs almost nothing in tax. Holding purely for sentimental reasons carries a real concentration risk instead.

Holding instead makes sense when the position fits and the dividend stream matters. The new basis also resets any future gifting math for the heir.

Assets given away later carry the stepped-up basis forward to the next generation. Each generation's planning restarts with the last death.

Working With Brokers After the Reset

The broker conversation always goes better with the right documents in hand from the start. Bring the death certificate, the estate's EIN letter, and the date-of-death statement.

Ask specifically how they will report basis on the next 1099-B. Confirm whether they flag the account as inherited in their system.

Inherited positions sometimes arrive split across covered and noncovered lots. Older shares purchased before broker reporting rules may show no basis at all.

The heir should supply the date-of-death value for those lots in writing. A written record with the broker prevents the next five years of mismatches.

One last habit protects the whole plan across generations. Review titling and beneficiary designations after every major family change.

Marriages, moves, and births all shift the step-up math quietly. An hour with the account paperwork each year keeps the reset intact.

The Rules That Decide the Outcome

Date-of-death value, automatic long-term treatment, and the IRD exception form the core. Titling and state law decide how much of a married couple's portfolio resets. Documentation converts all of it from theory into a lower tax bill for the family.

Every estate conversation should start with one question about the asset list. Which positions step up fully, and which carry IRD instead? The answer shapes what heirs sell first, what they hold, and how much wealth actually reaches the next generation.