The Step-Up in Basis at Death

The step-up in basis is perhaps the most powerful tax provision available to long-term investors and their heirs. When you inherit a security, its cost basis is reset ("stepped up") to its fair market value on the date of death, completely wiping out any built-in gains. If your parent bought Apple at $10 and it's worth $200 when they pass, you inherit it with a $200 cost basis. The $190 per share gain is never taxed.

For long-term buy-and-hold investors, this fundamentally changes estate planning strategy. Instead of harvesting all gains before death, you may want to deliberately hold appreciated securities to your heirs, unlocking a tax-free wealth transfer worth billions in aggregate to American families.

Quick definition: The step-up in basis (IRC Section 1014) is a provision allowing inherited property to have its cost basis adjusted to fair market value on the date of the owner's death. This "steps up" the basis, eliminating all built-in gains and resetting the heirs' cost basis to current market value, wiping out lifetime appreciation in terms of tax liability.

Key Takeaways

• Inherited property receives a "stepped-up" basis to fair market value at death, eliminating all built-in capital gains—a tax benefit worth billions annually to American estates.
• This applies to stocks, bonds, real estate, and most investment property; not to retirement accounts (IRAs, 401ks), which still face income tax on distributions.
• An heir can immediately sell inherited appreciated securities and owe zero capital gains tax—a powerful liquidity tool with no tax cost.
• The step-up is worth most on securities held decades (large unrealized gains) and for ultra-long-term holdings (30+ years to pass these assets to the next generation).
• The step-up is not automatic and requires proper estate planning: securities must clear probate or be held in trust to qualify for the benefit.
• Congressional proposals periodically threaten the step-up; long-term investors should understand how it works but not assume it will persist forever.

How the Step-Up Works

When someone dies and leaves property to an heir, the heir's cost basis is reset to the fair market value on the date of death (or six months later, if the executor elects the "alternate valuation date").

Example:

• Your parent buys Microsoft in 1995 at $30 per share.
• Microsoft is worth $300 per share on the date of your parent's death.
• Your parent's unrealized gain: $270 per share.
• You inherit 100 shares.
• Your cost basis (as the heir): $300 per share (not $30).
• You immediately sell at $300 per share: zero capital gains tax.

The $27,000 built-in gain ($270 × 100 shares) is never taxed to you or your parent's estate (unless the estate is subject to estate tax, a separate issue).

Compare this to harvesting: if your parent had sold the shares during life, the $27,000 gain would have faced federal tax (15-20% for long-term gains) plus state taxes, costing $4,500–$7,000 in immediate taxes. The step-up saves exactly this amount, and the full sale proceeds remain invested for your lifetime.

The Long-Term Investor's Advantage

The step-up is most valuable for buy-and-hold investors. Active traders who harvest gains regularly have little unrealized gain sitting at death. Long-term holders—who deliberately avoid selling appreciated securities for decades—accumulate enormous unrealized gains, all of which evaporate at death.

This creates a perverse incentive: to maximize the step-up's value, you should deliberately hold appreciated securities until death, not harvest them in low-bracket years.

Example Comparison:

Strategy	Lifetime Taxes	Inherited Value	Total to Heirs
Harvest all gains in low years	$50,000	$950,000	$950,000
Hold until death (get step-up)	$0	$1,000,000	$1,000,000

In this example, the step-up winner holds the securities for life, avoiding lifetime taxes, and the heirs receive the full $1 million (or invest the extra $50,000 for decades).

However, this assumes no estate tax. If your estate is large enough to owe federal estate tax (estates over $13.61 million per person in 2024), the calculus changes. The step-up applies regardless of estate tax, but there may be a combined federal+state tax cost that shifts the optimal strategy.

The Exclusion Amount and Estate Tax Context

The federal estate tax is separate from the capital gains tax. However, they interact with the step-up.

In 2024, each individual can pass $13.61 million to heirs estate-tax-free. Married couples can pass $27.22 million. Amounts above this are subject to a 40% federal estate tax.

The step-up applies to all inherited property, regardless of estate size. Even if your $50 million estate pays $15 million in estate tax, the heirs still receive a stepped-up basis on all securities, wiping out built-in gains for capital gains tax purposes.

Scenario: A $50 million estate with $30 million of unrealized gains.

• Federal estate tax due: 40% × (50M − 13.61M) = $14.556 million.
• Estate pays estate tax from other assets (cash, real estate).
• Heirs receive $35.444 million in assets (after estate tax).
• Cost basis is stepped up to fair market value, so $30 million of gains is eliminated.
• If heirs later sell inherited securities, they owe zero capital gains tax on those appreciated securities, despite paying $14.556 million in estate tax.

This is complex: high-net-worth families sometimes pay estate tax and capital gains tax on the same assets. Planning should address both.

Inheritance Tax vs. Capital Gains Tax

The step-up is an income tax benefit, not an estate tax benefit. Heirs pay no capital gains tax on appreciated inherited property. Depending on the estate size, they may pay federal estate tax, state inheritance tax, or both—but these are separate taxes levied on the estate, not on the gains themselves.

States vary:

• No inheritance tax: Most states.
• State inheritance tax: New Jersey, Kentucky, Maryland, Pennsylvania, Iowa.
• State estate tax: California, Oregon, Washington, Illinois, Connecticut, Maine, Massachusetts, Minnesota, Mississippi, Montana, New Hampshire, New York, Rhode Island, Vermont.

A $5 million estate in New York pays state estate tax (rates up to 16%) plus federal estate tax (40% above the exclusion). The step-up eliminates capital gains tax on appreciated securities, but estate taxes are still due.

Retirement Accounts Do Not Get the Step-Up

This is critical: the step-up does not apply to retirement accounts (IRAs, 401ks, 403bs, Roth IRAs). When an heir inherits a Traditional IRA, they still owe income tax on distributions. The "stepped-up basis" is not available.

However, Roth IRAs are different. While the step-up technically applies, Roth IRAs have no built-in gains to step up—Roth distributions are tax-free anyway. The step-up is moot for Roths.

Implication: Keep appreciated taxable securities in your taxable account and hold them until death. Keep retirement accounts (Traditional IRAs, 401ks) minimal, or name charitable organizations as beneficiaries instead of heirs. This optimizes the step-up for securities while reducing the income tax burden on heirs from retirement distributions.

A $5 million Traditional IRA inherited by a child creates a 10-year distribution requirement and federal income tax on all distributions (up to 37% rate), costing $1.5–$2 million in taxes. The same $5 million in appreciated taxable securities receives a step-up, costs heirs zero capital gains tax, and provides much greater after-tax wealth transfer.

Basis Adjustment at Death vs. Harvesting in Life

For a long-term investor deciding between harvesting gains in low-bracket years and holding until death:

Harvest in low-bracket years:

• Pro: You lock in 0-15% federal tax rates, plus avoid state taxes through relocation.
• Pro: The tax-saved money remains invested and compounds for 20-40 years.
• Con: Creates taxable events, requiring documentation and complexity.

Hold until death:

• Pro: Zero lifetime taxes; the full appreciated value passes to heirs.
• Pro: Heirs receive a stepped-up basis, allowing them to sell and rebalance without tax friction.
• Con: If you die before reaching low-bracket years, the opportunity is lost forever.
• Con: You sacrifice the compounding benefit of early harvesting.

Hybrid approach: Harvest gains in substantial low-bracket years (sabbaticals, unemployment), but hold core positions until death if you expect to remain in high brackets throughout your working life. This captures some tax benefits while preserving the step-up for long-held cores.

Congressional Threats to the Step-Up

The step-up has been a recurring target for congressional reform. Since 2021, various proposals have emerged to limit or eliminate it:

• Carried Interest step-up: Private equity partners would lose the step-up on unappreciated interests (though this narrowly targets a specific group).
• Modified step-up: Some proposals would apply only to a limited amount (e.g., $1 million) per heir or estate, with appreciation above that amount facing capital gains tax.
• Full elimination: Aggressive proposals would eliminate the step-up entirely, requiring capital gains tax on inherited property.

None of these have passed as of 2024, but the threat is real. Congress is unlikely to eliminate the step-up entirely (it affects millions of families), but narrowing it is possible.

Long-term planning implication: Do not assume the step-up will exist when you die. Plan assuming it might be limited or eliminated. This argues slightly in favor of harvesting some gains during your lifetime (to ensure you capture the tax benefit if law changes), while still holding core positions for the step-up benefit.

Real-World Examples

Scenario 1: Tech Stock Held for 40 Years

In 1984, a 35-year-old buys 1,000 shares of Apple at $0.22 per share (adjusted for splits), costing $220. Over 40 years, Apple grows to $200 per share. The investor's cost basis is $220; current value is $200,000.

At age 75, the investor passes away, leaving the Apple to a child. The child's cost basis is stepped up to $200,000 (the date-of-death value).

If the investor had harvested:

• Sell at age 70 when Apple is $150 per share = $150,000 proceeds.
• Realize a $149,780 gain.
• Federal tax at 20% (high earner): $29,956.
• State tax at 10% (California): $14,978.
• Total tax: $44,934.
• After-tax proceeds: $105,066 to reinvest.
• At 7% growth for 5 years until death: $147,098 total value.
• Child inherits $147,098 (and owes no further capital gains tax).

If the investor had not harvested:

• Investor holds until death at age 75 when Apple is $200 per share = $200,000.
• Child inherits with $200,000 stepped-up basis.
• Child can immediately sell at $200,000: zero capital gains tax.
• Child receives $200,000 (vs. $147,098).

Difference: $52,902 additional wealth for the child, purely from the step-up.

This assumes California state taxes and the 20% federal rate. In lower-tax states or with federal 15% rates, the gap narrows. But the step-up remains valuable for very long-held positions.

Scenario 2: Concentrated Position with Estate Tax Considerations

A founder with a $60 million net worth (mostly in company stock) passes away. The estate includes $30 million in unrealized gains on company stock.

Federal estate tax due: 40% × ($60M − $13.61M) = $18.556 million.

The heirs must pay $18.556 million in estate taxes. They sell some company stock (received with a stepped-up basis) to raise cash to pay taxes.

Because the stock received a step-up, they can sell $18.556 million worth of stock and realize zero capital gains tax (the cost basis equals the sale price, the stepped-up amount). Without the step-up, the same sale would generate capital gains tax on the $30 million of appreciation, costing an additional 20% × $30M = $6 million to the heirs.

In this case, the step-up reduces the tax burden on heirs from (Estate Tax + Capital Gains Tax) to just (Estate Tax), saving $6 million.

Common Misconceptions

1. The step-up only applies if the estate is taxable. False. The step-up applies to all inherited property, regardless of estate tax. Even small estates benefit.

2. Heirs must immediately sell; otherwise, they forfeit the step-up. False. The step-up is permanent. If an heir inherits appreciated stock and holds it for another 20 years before selling, the step-up was "used"—the original investor's gains were never taxed, and the heir's new gains start from the stepped-up basis.

3. The step-up applies to retirement accounts. False. IRAs, 401ks, and other retirement accounts do not step up. Heirs must pay income tax on distributions, and the account must be distributed within 10 years (as of the 2019 SECURE Act).

4. If you harvest gains, you lose the step-up benefit. False. The step-up applies to whatever securities remain at death. Harvesting some and holding others is a hybrid strategy that captures both benefits.

5. The step-up is guaranteed forever. Probably not. Congress has repeatedly proposed limiting or eliminating it. Plan assuming it might change.

FAQ

Q: Do I need to own securities until death to get the step-up, or can I sell and reinvest in new securities? A: The step-up applies to inherited property, not to how long you held it before death. If you inherit Apple stock, harvest the step-up by selling it, and then buy Microsoft with the proceeds—the Microsoft is not stepped up (you're the new owner with a new cost basis). Only the original inherited property gets the step-up.

Q: What if I live in a state with an inheritance tax? A: The step-up eliminates capital gains tax but not state inheritance tax. Your heirs will owe state inheritance tax if you live in a state with one (New Jersey, Pennsylvania, etc.). The step-up does not change this.

Q: Should I harvest all my losses before I die? A: No. Capital losses are only valuable if you have gains to offset or income to shelter. If you die with unused loss carryforwards, they expire and your heirs cannot claim them. It's worth harvesting losses during life to offset gains or ordinary income, but do not hold losing positions to the grave hoping your heirs will benefit.

Q: Does the step-up apply to cryptocurrency or other digital assets? A: Yes. Any property (physical or digital) receives a stepped-up basis at death. Cryptocurrency with built-in gains will have its cost basis reset to fair market value on the date of death.

Q: If I'm in poor health, should I harvest gains now or hold them for the step-up? A: If you expect to die soon, holding for the step-up is likely optimal (assuming you have heirs and not a large enough estate to owe federal estate tax). The tax-free transfer is worth more than the compounding on a harvested amount over a short period. However, consult a tax professional, as your specific situation (estate size, state taxes, age) affects the decision.

Q: Can I gift appreciated securities to my heirs now to avoid probate? A: You can, but you should not expect a step-up on gifted property—only on inherited property at death. Gifting during your lifetime locks in your cost basis for your heirs. The heirs get your cost basis, not a stepped-up basis. Hold until death to preserve the step-up.

Related Concepts

• Cost basis: The original purchase price of a security; capital gains are the difference between sale price and cost basis.
• Estate tax: Federal tax (40%) on estates exceeding $13.61 million (2024); applies to net worth at death.
• Inheritance tax: State tax (0-18%) on bequests to heirs; varies by state and relationship to deceased.
• Capital gains tax: Federal tax on investment profits; long-term gains are taxed at 0%, 15%, or 20%; short-term gains are ordinary income.
• Fair market value: The price at which property would sell between a willing buyer and seller; used to value inherited property for basis purposes.

Summary

The step-up in basis is a powerful wealth-transfer tool for long-term investors. Securities held until death are inherited with a cost basis equal to their fair market value on the date of death, completely eliminating all built-in capital gains from income taxation.

For buy-and-hold investors with very long time horizons (30+ years), the step-up often outweighs the benefit of harvesting gains in low-bracket years. The full appreciated value passes to heirs tax-free, and heirs can immediately sell and rebalance without capital gains tax friction.

However, the step-up is not automatic—proper estate planning is required—and it is not guaranteed to persist forever. Congress periodically threatens to limit or eliminate it. A balanced approach combines selective harvesting in low-bracket years with holding core appreciated positions until death, capturing both the compounding benefit of early tax savings and the step-up benefit on long-held securities.

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Read the next article: Donating Appreciated Stock