Inherited Stock: Definition, How It Works, and Example

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Inherited stock is shares of a company that a beneficiary receives after the original owner dies. Under U.S. federal tax law, the heir does not take over the owner’s purchase price. The shares get a new cost basis equal to their fair market value on the date of death, known as a stepped-up basis. Gain built up during the original owner’s lifetime is never subject to capital gains tax. The heir owes it only on growth after the date of death, and only when the shares are sold.

What Happens to Your Stocks When You Die

When a stockholder dies, the shares stay in the account and are frozen until someone with legal authority claims them. The route they take depends on how the account was titled:

1. Transfer-on-death (TOD) or named beneficiary: the brokerage moves the shares directly to the beneficiary, usually without probate.
2. Joint account with right of survivorship: the surviving owner keeps the account.
3. Trust: the trustee distributes or holds the shares under the trust’s terms.
4. Will or no will: the shares become part of the probate estate. The executor (or court-appointed administrator) gathers the assets, pays debts and taxes, then distributes what remains.

To transfer the shares, the broker typically asks for a certified death certificate, proof of identity and, for probate assets, proof of the executor’s authority, such as letters testamentary or a court order. The executor usually completes the firm’s transfer paperwork, and the shares then move into the heir’s own brokerage account.

Cost Basis of Inherited Stock

Cost basis is the amount subtracted from sale proceeds to find a taxable gain or loss. For inherited stock, federal law resets that basis to fair market value at death:

Taxable gain = sale proceeds − (date-of-death value per share × shares sold)

How the Date-of-Death Value Is Set

For publicly traded shares, fair market value is generally the average of the stock’s high and low trading prices on the date of death. If death falls on a weekend or holiday, prices from the nearest trading days are averaged. The estate’s executor may instead elect an alternate valuation date six months after death. That election is allowed only if it reduces both the value of the gross estate and the estate tax owed. If made, the heir’s basis becomes the alternate-date value.

Brokers often update the basis on the transferred lot. Heirs should still confirm the figure, because an incorrect basis on the sale’s tax form leads to overpaying or underpaying.

Example of Inherited Stock

Hypothetical: A mother bought 100 shares at $20 each, a total cost of $2,000. On the day she dies, the shares average $150, so they are worth $15,000. Her son inherits them, and a few months later sells all 100 at $160 for $16,000.

• Son’s cost basis: 100 × $150 = $15,000
• Taxable gain: $16,000 − $15,000 = $1,000, taxed at long-term capital gains rates
• Untaxed lifetime gain: $15,000 − $2,000 = $13,000

If instead the shares had been bought at $100 and fallen to $25 by the date of death, the son’s basis would be $25 per share. The $75-per-share loss is gone, and he cannot use it to offset other gains.

Inherited Stock vs. Gifted Stock and Retirement Accounts

Gifted stock received during the giver’s lifetime generally keeps the giver’s original basis, called a carryover basis. Had the mother in the example given the shares to her son while alive, his basis would have been $2,000. Selling at $16,000 would produce a $14,000 taxable gain instead of $1,000.

Stocks inside an inherited IRA or 401(k) do not get a step-up. The account passes as a retirement account. Withdrawals from a traditional account are taxed as ordinary income, and distributions must follow the required withdrawal rules for beneficiaries. Selling one stock and buying another inside the inherited account is not itself taxable.

Community property: in community property states, a surviving spouse may receive a step-up on both halves of community-owned stock, not just the deceased spouse’s half.

Why It Matters for Estate Planning

The step-up affects when it makes sense to sell. An owner holding highly appreciated shares may leave them to heirs rather than sell and pay tax on the gain. Shares that have lost value point the other way: selling before death lets the owner claim the loss, which the heir could never deduct.

Limitations of Inherited Stock

• Estate tax still applies to large estates: the step-up removes income tax on lifetime gains, not estate tax. The estate pays that tax on its total value above the federal exemption, before heirs receive anything.
• Probate delays: shares without a TOD or beneficiary designation can sit untouched while probate runs, and their price can move in the meantime.
• Concentration risk: an inherited position may be a large share of the heir’s net worth. Because the reset basis leaves little embedded gain right after death, diversifying early often costs little in tax.

FAQs

The Bottom Line

Heirs and owners of appreciated or declining shares are the ones most affected by the stepped-up basis. Heirs should confirm the date-of-death basis their broker reports, since diversifying soon after inheriting often costs little in tax. Owners can hold highly appreciated shares to pass on, but should consider selling shares that have lost value before death to claim a loss the heir could never deduct.