The Step-Up in Basis: Eliminating Capital Gains on Inherited Wealth
Executive Summary
In the realm of federal tax law, Section 1014 of the Internal Revenue Code provides one of the most powerful wealth-preservation mechanisms available to High-Net-Worth families: the “Step-Up in Basis.” When an individual passes away, the tax basis of the highly appreciated assets they leave behind is automatically readjusted—”stepped up”—to the current Fair Market Value (FMV) on the date of their death. This simple adjustment effectively erases all embedded capital gains taxes that accumulated during the decedent’s lifetime.
Consider a patriarch who purchased a commercial property for $2 million in 1990. By 2026, the property is worth $20 million. If he sells the property while alive, he triggers a capital gains tax on the $18 million profit, potentially costing the family over $4 million in federal and state taxes. [IRC Sec. 1001] However, if he holds the property until his death and leaves it to his children, their new “cost basis” becomes $20 million.
If the children immediately sell the property for $20 million, their taxable capital gain is mathematically zero. [IRC Sec. 1014] This provision heavily disincentivizes UHNW families from liquidating highly appreciated assets during their lifetime. Instead, family offices employ the “Buy, Borrow, Die” strategy—holding appreciating assets indefinitely, borrowing against them to fund lifestyle needs, and utilizing the step-up in basis to pass the wealth tax-free to the next generation.
Structural Background
To maximize this tax code provision, investors must deeply understand the difference between transferring wealth while alive versus transferring wealth at death.
Lifetime Gifts (Carryover Basis)
If you give an asset to your children while you are alive, they receive your original “carryover basis.” [IRS Pub. 551] If you bought stock for $100,000 and gift it to your daughter when it is worth $1 million, her basis remains $100,000. When she eventually sells the stock, she will owe capital gains taxes on the entire $900,000 of appreciation. For this reason, giving highly appreciated assets to heirs during your lifetime is often a severe tax error.
Transfers at Death (Step-Up Basis)
Assets that are included in your taxable estate at the time of your death receive the step-up. This includes assets held in your individual name, assets in a Revocable Living Trust, and assets held as Joint Tenants. Because the IRS assumes these assets could be subject to the 40% federal estate tax, it grants relief on the capital gains side, preventing double taxation on the same wealth. [IRC Sec. 1014]
If you live in a community property state (like California, Texas, or Washington), the tax benefits are doubled. When one spouse dies, both the deceased spouse’s half and the surviving spouse’s half of the community property receive a full step-up in basis. [IRS Pub. 555] This allows the surviving spouse to sell jointly owned assets completely tax-free immediately after their partner’s passing.
Risk Layer
The step-up in basis is not a universal blanket; certain asset classes and trust structures are specifically excluded from this benefit.
Income in Respect of a Decedent (IRD)
The step-up only applies to capital assets. It explicitly does *not* apply to Income in Respect of a Decedent (IRD). [IRC Sec. 691] IRD includes traditional IRAs, 401(k)s, unpaid bonuses, and tax-deferred annuities. Because the principal and growth inside a traditional IRA were never subjected to income tax during the decedent’s lifetime, the heirs inherit the account with no step-up and must pay ordinary income tax on every dollar they withdraw.
The Irrevocable Trust Trap
A common operational conflict in UHNW estate planning is balancing the federal estate tax exemption with capital gains elimination. When you move an asset into a completed-gift Irrevocable Trust to shield it from the 40% estate tax, that asset is permanently removed from your estate. Consequently, when you die, the assets inside that irrevocable trust generally do *not* receive a step-up in basis. Your heirs will inherit the trust’s carryover basis.
Strategic Framework
Optimizing the step-up in basis requires a meticulous “asset location” strategy, determining exactly which assets should be gifted now versus which should be held until death.
Actionable Portfolio Allocation Steps
Coordinate with your CPA and family office to implement these tax-efficiency rules:
- Hold Highly Appreciated Assets: Never gift your primary residence, low-basis founder’s stock, or fully depreciated commercial real estate during your lifetime. Hold these in your individual name or Revocable Living Trust to ensure they receive a 100% basis step-up at your passing.
- Gift Cash and High-Basis Assets: If you want to utilize your lifetime gift exemption, transfer cash, newly acquired stock, or assets with minimal appreciation. This transfers the wealth without passing on a latent capital gains tax bomb.
- Execute the “Buy, Borrow, Die” Model: If you need cash to buy a yacht or fund a new venture, do not sell your $10 million stock portfolio. Instead, secure a Securities-Backed Line of Credit (SBLOC) against the portfolio. You pay a small interest rate while the assets continue to grow tax-deferred. Upon your death, the assets get a step-up, the estate pays off the loan tax-free, and the heirs receive the clean balance.
- Secure Formal Appraisals: The step-up is not automatic on paper. Upon your death, your Executor must immediately hire qualified appraisers to formally establish the exact Fair Market Value of your real estate and private businesses as of your Date of Death (or the alternate valuation date). [IRS Form 706]
| Wealth Transfer Event | Cost Basis Treatment | Capital Gains Tax Result for Heirs |
|---|---|---|
| Lifetime Gift to Children | Carryover Basis (Donor’s original cost) | High (Heirs pay tax on all historical growth when sold) |
| Transfer via Irrevocable Trust | Carryover Basis (Trust’s original cost) | High (Trust or beneficiaries pay tax upon sale) |
| Inheritance at Death (Non-Community) | Full Step-Up to FMV at Death | Zero (If sold immediately at FMV) |
| Spouse’s Death (Community Property) | Double Step-Up (Both Halves to FMV) | Zero (Surviving spouse can sell 100% tax-free) |
The step-up in basis is a profound wealth multiplier. By aggressively preventing the probate process while strategically retaining highly appreciated assets within the taxable estate, UHNW families can mathematically eliminate millions of dollars in capital gains liability.
Frequently Asked Questions
Yes. The IRS currently classifies cryptocurrency (like Bitcoin or Ethereum) as property, not currency. Therefore, it is treated as a capital asset. If you hold highly appreciated crypto until your death, your heirs will receive a full step-up in basis to the market value of the coin on your date of death. [IRS Notice 2014-21]
Yes. Section 1014 works in both directions. If you buy a stock for $500,000 and it is only worth $200,000 when you die, your heirs inherit a “stepped-down” basis of $200,000. They cannot sell the stock and claim the $300,000 capital loss. To capture the loss, you must sell the depreciated asset while you are still alive. [IRS Pub. 550]
Generally, no. Inheritances of capital assets (cash, real estate, standard brokerage accounts) are not considered taxable income to the recipient at the federal level. [IRC Sec. 102] The only taxes involved would be the federal estate tax (paid by the estate, not the heir) and potential capital gains taxes on any future appreciation *after* the date of death step-up.
Typically no, but there is an advanced strategy. A grantor can use a “swap power” (a common feature in Intentionally Defective Grantor Trusts). Before death, the grantor swaps cash or high-basis assets from their personal accounts into the irrevocable trust, in exchange for pulling the highly appreciated, low-basis assets back into their personal name. By dying with the appreciated assets back in their own name, they secure the step-up. [IRC Sec. 675(4)]
Series
Estate Planning & Trust Strategy
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Data Sources & References
- [1] Internal Revenue Code (IRC) — 26 U.S. Code § 1014 – Basis of property acquired from a decedent
- [2] Internal Revenue Service (IRS) — Publication 551: Basis of Assets