Step-Up in Basis Estate Planning: The Death Tax Eliminator That Most Families Miss
One of the most powerful tax rules in the entire Internal Revenue Code is Section 1014 — the step-up in basis at death. When a person dies holding appreciated assets, those assets receive a new tax basis equal to their fair market value on the date of death, permanently eliminating every dollar of embedded capital gain that accumulated during the decedent's lifetime. For high net worth families with appreciated real estate, concentrated stock positions, or long-held business interests, this rule represents the ultimate exit from decades of accumulated unrealized gains. Our estate planning advisors build the step-up in basis into every comprehensive wealth transfer strategy.
How the Step-Up Works: The Most Important Tax Provision Most People Don't Know
Under Section 1014, when a taxpayer dies holding property that has appreciated in value, their heirs inherit that property with a new tax basis equal to the fair market value on the date of death — not the original purchase price paid by the decedent. The capital gain that accumulated during the decedent's lifetime — sometimes decades of appreciation — simply disappears from the tax system. Neither the decedent's estate nor the heirs ever pay income tax on that appreciation, regardless of how large it is.
The practical impact is staggering for families with significant appreciated assets. A family that purchased Manhattan commercial real estate in 1995 for $1 million, watched it appreciate to $15 million by 2026, and held it until the owner's death distributes that property to their children with a $15 million basis. If the children sell immediately after inheriting, they pay zero capital gains tax on the $14 million of lifetime appreciation. Compare this to the owner selling the property while alive — potentially triggering $3 to $4 million in combined federal and New York taxes on that $14 million gain. The step-up in basis is the most powerful free tax benefit in the estate planning toolkit, and maximizing exposure to it is a core objective of our estate advisory.
Coordinating Step-Up Planning with 1031 Exchanges
The classic HNWI real estate strategy is exactly this combination: use 1031 exchanges to defer capital gains recognition indefinitely throughout the investor's active investing lifetime, building a larger and larger portfolio by reinvesting the full pre-tax proceeds into each successive property. Then hold the portfolio until death, at which point the step-up in basis permanently eliminates all of the deferred taxable gain accumulated across every 1031 exchange in the chain.
This strategy is completely legal, completely transparent, and has been deliberately preserved by Congress through multiple tax reform efforts precisely because it encourages long-term real estate investment and prevents the lock-in effect that would result if capital gains tax were imposed at each property sale. We model 1031 exchange chains with step-up planning horizons of 20 to 40 years for clients in their 40s and 50s, quantifying the total tax elimination that can be achieved by holding the portfolio through their natural lifetime. For 1031 exchange strategies, contact our team.
What Does NOT Get a Step-Up: IRAs, 401(k)s, and Income in Respect of a Decedent
The step-up in basis does not apply to all assets. Assets held inside traditional IRAs and 401(k) plans do not receive a step-up in basis at death — these accounts contain pre-tax money that was never subjected to income tax during the owner's lifetime, and heirs must pay ordinary income tax on every dollar they withdraw, regardless of when the account was inherited. This distinction creates an important asset location discipline in estate planning: the assets most likely to appreciate significantly should be held in taxable accounts where they can benefit from the step-up, while income-generating assets with lower appreciation potential are better suited to tax-deferred accounts.
Similarly, deferred compensation — non-qualified deferred compensation plan balances outstanding at the employee's death — constitutes Income in Respect of a Decedent (IRD). IRD is income that was earned by the decedent but not yet received or taxed before death. It does not receive a step-up in basis, and heirs must include it in ordinary income when they receive it. For high-earning executives with large NQDC plan balances, the IRD exposure at death must be factored into the estate plan alongside the estate tax, creating a potential combined income-and-estate tax rate on those assets approaching 75% in a New York resident estate. Our HNWI advisors model IRD exposure explicitly in every executive estate plan.
Strategic Asset Retention vs. Gifting: When Not to Do a Step-Up
The step-up in basis creates a powerful argument for retaining highly appreciated assets — particularly real estate and concentrated stock positions — in the taxable estate rather than gifting them away during life. When a taxpayer gifts an appreciated asset, the recipient receives the donor's original carryover basis, meaning the embedded gain survives the gift and will eventually be taxed when the recipient sells the asset. But when the same asset is retained in the estate and passed at death, the step-up eliminates the gain entirely.
However, this calculus changes when the estate is large enough to be subject to the federal or New York estate tax. If retaining an appreciated asset in the estate subjects its full fair market value to a 40% federal estate tax, the estate tax cost may exceed the capital gains tax that would have been paid on an inter-vivos sale or gift. The optimization between the estate tax cost of retention and the income tax cost of gifting requires precise modeling of the specific asset, the estate size, and the timing of the expected death event — analysis that our estate planning team performs as a standard component of every comprehensive engagement.
Related Resources
Estate & Trust Planning
Comprehensive estate planning integrating step-up basis optimization.
1031 Exchange Guide
Chain 1031 exchanges and eliminate deferred gains at death.
Gifting Strategies
When gifting beats holding — the step-up optimization analysis.
HNWI Advisory
Integrated lifetime-to-death wealth transfer planning.