1031 Exchange explained: how to defer tax on a property sale

Sell an investment property and you usually pay tax on the gain. A 1031 exchange (named after §1031 of the U.S. tax code) lets you avoid paying it right now: you roll the proceeds into another like-kind property and defer the capital-gains tax. Your capital keeps working in full instead of losing 20–37%. Over time that’s tens to hundreds of thousands of dollars of difference.

Here’s how it works, which deadlines are critical, and where California adds a catch.

What a 1031 exchange is

It’s a legal way to defer tax, not erase it. You aren’t hiding the gain — you’rereinvesting it into another property “of like kind,” and the moment of paying tax moves into the future. You can repeat this many times, compounding equity from one property to the next.

The key limit: it works only for property heldfor investment or business use. A personal home doesn’t qualify — that’s covered by a separate rule, §121.

Three numbers to remember

45 days — to identify in writing the property (or properties) you’ll buy.
180 days — to close on the replacement.
0 — the capital-gains tax you pay now, if it’s done right.

An important detail: these clocksrun at the same time from the sale of the first property — they don’t stack. Day 45 comes first, then day 180, inside one window. And they cannot be extended, even if the deadline lands on a weekend or holiday (IPX1031).

What counts as “like-kind”

For real estate the definition is broad: almost any U.S. investment property can be exchanged for almost any other investment property. A duplex for a commercial building, land for a rental home. What matters is that both are used for investment or business, not personal living (IRS).

Why you need a qualified intermediary (QI)

For an exchange to count, youcannot take the money into your own hands between the sale and the purchase. An independent qualified intermediary holds the funds and runs the transaction. If the cash reaches you for even a day, the exchange breaks and the tax comes due.

The catches: recapture and California’s clawback

Two things people forget:

Depreciation recapture. Capital-gains tax is deferred, but the recapture of previously claimed depreciation is usually taxedright away, at up to 25%.
California clawback. If you exchange a California property for a replacement outside the state, California requires you to file Form FTB 3840 every year and will later reach back to tax the deferred California gain when you sell in a taxable transaction (IPX1031).

When it makes sense

A 1031 is most worthwhile when the gain is large and you plan to stay invested and keep growing — from a smaller property into a bigger one, from one market into another. It’s part of a wider picture of buying real estate the smart way, which we cover in the tax strategies section.

This is educational material, not tax or legal advice. Discuss the exact deadlines, amounts, and whether §1031 fits your situation with your CPA and tax advisor.

Frequently asked questions

What is a 1031 exchange in plain terms?

It is a section of the U.S. tax code (§1031) that lets you sell investment real estate without paying tax on the gain right away. Instead you roll the proceeds into another like-kind property and defer the tax. It's a legal mechanism, not a loophole.

What are the deadlines in a 1031 exchange?

Two strict deadlines run at the same time from the sale date: 45 days to identify the replacement property in writing, and 180 days to close. They cannot be extended, even if the deadline falls on a weekend or holiday.

Can I use a 1031 exchange on my primary home?

No. §1031 applies only to property held for investment or business use. Your main home is covered by a different rule, §121, which excludes part of the gain on a home you lived in.

Do I pay any tax at all in an exchange?

Capital-gains tax is deferred, but depreciation recapture is usually taxed right away at up to 25%. California also applies a 'clawback': it later reaches back to tax the deferred California gain if you sell an out-of-state replacement property in a taxable transaction.

Sources

Book a consultation