1031 Exchange and Inheritance: Step-Up in Basis and Estate Planning

A real estate investor can defer capital gains tax for an entire career, then pass the property to their heirs and watch the tax disappear. It sounds too good to be legal. It is really just two ordinary features of the tax code working in sequence.

The first is the 1031 exchange, which lets you sell one investment property, buy another, and defer the tax on your gain. The second is the stepped-up basis at death. Your basis is what a taxable gain is measured against, roughly what you paid for a property. At death, the tax code resets it to the property's current value, which can erase the gain you spent a lifetime deferring.

How the step-up in basis works

Under IRC Section 1014, an inherited property is valued at its fair market value on the date of death, or on an alternate date six months later. That value becomes the heir's basis. It replaces whatever basis the original owner had, including every dollar of gain deferred through earlier 1031 exchanges.

Example: Say you buy a rental property in 2000 for $200,000. Over 25 years and three 1031 exchanges, you build that into a portfolio worth $2 million, while your cost basis stays around $200,000. Sell it all, and you would owe capital gains tax on roughly $1.8 million of gain.

Hold it instead, and your heirs inherit at the $2 million fair market value. That becomes their basis. If they sell the next day for $2 million, their taxable gain is zero. The $1.8 million of deferred gain is wiped out.

Building the strategy over a career

During your working years, a 1031 exchange defers the tax on each sale, so the full pre-tax amount stays invested. More capital keeps working, whether you are trading up from smaller properties to larger ones or moving from concentrated holdings to a more diversified set.

Later in life, the math changes. The gains you have been deferring matter less, because the step-up at death is set to eliminate them. At some point you may stop exchanging and simply hold what you own.

A typical path looks like this:

1. Acquire investment property and build equity through rental income and appreciation
2. Exchange into larger or better properties, deferring all capital gains
3. Continue exchanging as long as it serves your investment goals
4. In later years, hold your appreciated portfolio
5. At death, heirs receive a stepped-up basis

The pattern is decades of tax-deferred compounding, followed by a basis reset that clears the accumulated tax.

Why entity structure matters

The step-up applies cleanly to property owned individually or in a revocable living trust. The property steps up to fair market value, and heirs inherit with the higher basis.

Partnerships and multi-member LLCs are more complicated. A partnership interest may step up at death, but the heir's basis in the underlying property depends on whether a Section 754 election is in place, which lets the partnership adjust the basis of its own assets, and on how the partnership allocates that basis. This is where entity structuring meets estate planning, and professional guidance is important.

Some investors hold properties in individual trusts or single-member LLCs specifically to preserve a clean step-up.

When a step-up may not be the priority

• If you are in your 40s or 50s, the step-up is decades away, and the immediate work is accumulation and tax-deferred compounding through exchanges.
• If you plan to spend your wealth in retirement, the step-up never applies, because the property is sold during your lifetime.
• If tax law changes, the step-up could be modified or repealed. Current law provides it; future legislation is uncertain.
• If simplification matters more, a very elderly investor with a large deferred-gains portfolio may find that selling, paying the tax, and simplifying is worth more than holding complex assets for a step-up.

Coordinating estate documents with your exchange strategy

Your estate plan - will, trust, beneficiary designations - should line up with your 1031 exchange strategy:

• Confirm that trust language preserves the step-up. Some provisions can quietly reduce it.
• Make sure exchange documents and trust documents agree on which entity holds the replacement property.
• If properties are going to multiple heirs, consider how each property affects each heir's tax situation and investment preferences.

Communicating with heirs

Many investors skip this step. Your heirs should know:

• What properties they will inherit and their approximate value
• That their tax basis will be the fair market value at the date of death, not your original purchase price
• Their options: hold, sell with gains measured from the stepped-up basis, or exchange again
• Who to contact for professional guidance (your CPA, exchange advisor, estate attorney)

A short written summary tucked into your estate plan keeps heirs from acting on the wrong assumption, such as thinking they carry your original low basis and overpaying tax they do not owe.

Where to start

Whether this strategy fits depends on what you want the property to do. Are you building wealth to pass on, or planning to spend it in retirement? Does your entity structure support a clean step-up? Those questions come before the paperwork. An advisor who understands both 1031 exchanges and estate planning can help you see how the two fit together.