Swap-til-you-drop: how the basis step-up works at death

The phrase "swap til you drop" describes a deliberate lifetime strategy: execute Section 1031 exchanges repeatedly to defer capital gains tax, then die holding the properties. Heirs inherit at a stepped-up basis equal to the fair market value on the date of death, and the deferred gain that accumulated over decades simply vanishes.

It is a lawful and well-established planning technique. It is also not automatic. Improper coordination between exchange planning and estate documentation can expose heirs to the very tax liability the strategy was designed to eliminate.

The statutory foundation: IRC Section 1014

The step-up provision lives in IRC Section 1014(a)(1). When a taxpayer dies holding appreciated property, the property's basis is "stepped up" to fair market value at the date of death. Any gain that accrued during the decedent's lifetime -- including gain deferred through 1031 exchanges -- is permanently excluded from the estate's tax calculation.

For a property purchased in 1990 for $400,000, depreciated over the hold period, and exchanged twice into properties now worth $3 million, the heirs' basis is $3 million on the date of death. When they sell, they owe tax only on appreciation above $3 million -- not on the full $2.6 million of deferred gain accumulated over 35 years.

The step-up applies to any form of appreciated property: direct ownership, tenancy-in-common interests, and beneficial interests in a Delaware Statutory Trust. It does not apply to ordinary income items like installment notes or unrealized depreciation recapture that has been accelerated into the estate.

Accumulating exchanges: the compounding effect

The power of the strategy lies in compounding. Each exchange preserves the investor's full equity for redeployment, rather than paying 20-37% of it in federal tax (plus any applicable state capital gains tax). Over a 30-year exchange program in high-appreciation markets like California or the Pacific Northwest, the economic difference between exchanging and paying tax is enormous.

Consider a simplified illustration. An investor sells a $1 million property with a $500,000 embedded gain. A taxable sale at a 30% blended rate yields $850,000 for reinvestment. A 1031 exchange preserves the full $1 million. Over 10 years at a 7% annual appreciation rate, the $1 million compounding base produces approximately $1.97 million versus $1.67 million from the after-tax base -- a $300,000 difference in a single cycle. Across two or three cycles, the gap compounds substantially.

Estate planning integration

The step-up strategy requires direct coordination between the exchange program and the estate plan. Several points are critical.

Revocable living trusts. Property held in a revocable living trust at death generally qualifies for the step-up, because the grantor is treated as the owner for income tax purposes. Property transferred to an irrevocable trust before death, however, may not qualify -- the basis step-up rules depend on whether the property is included in the gross estate under IRC Section 2033 or 2036.

Community property. In community property states -- California, Nevada, Arizona, Washington, and others -- the surviving spouse's half of community property also receives a step-up to fair market value on the date of the first spouse's death. This is sometimes called the double step-up. For married investors in these states, the benefit of the strategy is even greater, because both halves of the community property basis reset at death.

Tenancy in common vs joint tenancy. Property held in joint tenancy with right of survivorship passes automatically to the surviving joint tenant but only the decedent's proportionate share receives the step-up. Property held as tenants in common allows each co-owner's interest to pass through their estate, triggering the step-up on each decedent's share separately. Estate attorneys frequently restructure joint tenancy holdings for this reason.

When to stop exchanging

The strategy does not always call for perpetual exchanges. At some point, the investor's health, the complexity of managing multiple replacement properties, or a desire for passive income may favor a different structure.

The 721 UPREIT contribution offers one alternative: contribute into a REIT operating partnership for liquidity while preserving the step-up benefit at death for OP unit holders. Charitable remainder trusts offer another path for philanthropically inclined investors -- the CRT accepts the appreciated property, sells it tax-free, and pays an income stream to the investor for life, with the remainder passing to designated charities.

A simple hold -- stop exchanging and manage the existing properties for income -- is also a valid endpoint for investors who no longer want to locate replacement properties within the 45-day identification window.

Practical limitations

The step-up strategy has limits that are sometimes understated in promotional materials.

State estate taxes are not automatically eliminated. Several states impose their own estate or inheritance tax on assets passing at death, and the federal step-up does not affect state-level obligations. California, notably, has no separate estate tax as of 2026, but New York and Washington impose meaningful state estate taxes.

The Tax Cuts and Jobs Act of 2017 doubled the federal estate tax exemption to $11.18 million per individual (indexed for inflation, currently above $13 million). Without congressional action, the exemption is scheduled to revert to approximately $6-7 million in 2026. Investors with large exchange portfolios should model both scenarios with an estate attorney.

The step-up in basis is valuable only if the heirs retain the property or sell it shortly after inheriting. Heirs who sell immediately capture the full benefit; heirs who continue to hold and the property appreciates further will eventually owe tax on the post-death appreciation.

Coordination with a qualified intermediary

Nothing about the swap-til-you-drop strategy requires any special election or filing. The 1031 exchange program operates as it normally would. The estate plan simply needs to document clearly which entity or trust holds each property, to ensure the property is included in the gross estate at death and qualifies for the step-up treatment. A qualified intermediary handles the mechanics of each exchange; the estate attorney handles the ownership structure that ensures the step-up applies.

Consult both advisors before beginning a multi-decade exchange program. The structural decisions made at the first exchange often constrain options at the last.