If you own a rental property in California that has gone up a lot in value, selling it can mean a large tax bill. A 1031 exchange lets you defer that tax by putting the proceeds into another investment property instead of cashing out. It’s a powerful tool, but the deadlines are strict, the paperwork matters, and California has its own rules that follow you even if you move your money to another state. This guide explains how it works, what trips people up, and when simply selling may be the better choice.

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What a 1031 Exchange Does

Section 1031 of the Internal Revenue Code lets you defer federal capital gains tax and depreciation recapture when you exchange real property held for business or investment for other “like-kind” real property. California follows the same basic rule for state tax. The tax isn’t forgiven, it’s postponed. Your basis carries over to the new property, and the deferred gain comes due when you eventually sell in a taxable sale.

Like-kind is broader than many people expect. For real estate, almost any investment property can be exchanged for almost any other investment property in the United States: a single-family rental for a fourplex, an apartment building for a commercial building, or land held for investment for a rental. Since 2018, only real property qualifies. What doesn’t qualify:

Your primary residence or a vacation home you mostly use yourself
Property you bought mainly to fix and resell
Property outside the United States, if you’re exchanging U.S. property

The Rules You Can’t Miss

Use a qualified intermediary

You can’t receive the sale proceeds yourself, even briefly. A qualified intermediary (QI) holds the money between the sale and the purchase. The QI must be set up before your sale closes. If the money lands in your account, the exchange fails. Your attorney, real estate agent, or anyone who has worked for you in certain roles within the past two years generally can’t serve as your QI.

The 45-day identification deadline

You have 45 days from the day you close the sale to identify possible replacement properties in writing. Most people use the three-property rule, which lets you name up to three properties of any value. There are other identification rules for naming more, but they come with stricter conditions.

The 180-day closing deadline

You must close on the replacement property within 180 days of selling, or by the due date of your tax return for that year (including extensions), whichever comes first. If you sell late in the year, file an extension so you don’t lose part of the 180 days. These deadlines generally aren’t extended for weekends or holidays.

Watch out for boot

To defer all of your gain, the replacement property generally needs to be worth at least as much as the one you sold, and you need to reinvest all of your net proceeds. Any cash you take out, or any drop in mortgage debt that isn’t made up with new cash or a new loan, is called “boot” and is taxable.

California’s Clawback Rule and Form FTB 3840

California does something most states don’t. If you exchange California property for property in another state, California keeps track of the gain that came from your California property. When you eventually sell the out-of-state property in a taxable sale, California still taxes that original California gain, even if you no longer live here.

To keep track, the Franchise Tax Board requires Form FTB 3840 for the year of the exchange and every year after that, generally until the deferred California gain is recognized. According to the FTB, if you don’t file it, the FTB can estimate your income and assess tax, penalties and interest. This is easy to forget once your property and your tax preparer are both out of state, so put it on your calendar every year.

California also generally requires withholding of 3⅓% of the sales price when California real estate is sold. A properly structured 1031 exchange can qualify for an exemption, but cash you take out of the exchange may still be subject to withholding. Your escrow officer and QI will handle Form 593, but it helps to know about it ahead of time.

A Worked Example

Here’s a simplified, made-up example. It ignores state tax details and assumes no mortgage.

	Amount
Original purchase price	$400,000
Depreciation taken over the years	$120,000
Adjusted basis	$280,000
Sale price	$1,100,000
Selling costs	$60,000
Net proceeds	$1,040,000
Gain	$760,000

Full exchange: The owner buys a replacement property for $1,040,000 or more and puts the full $1,040,000 into it through the QI. No tax is due now. The new property’s basis is lower than its price, reflecting the deferred gain.

Partial exchange: The owner reinvests $940,000 and takes $100,000 in cash. That $100,000 is boot and is taxable now. The rest of the gain stays deferred.

Outright sale: The owner pays federal tax on the $760,000 gain, including depreciation recapture, plus California income tax. California taxes capital gains as ordinary income, with rates up to 13.3%. A CPA can estimate the actual number for your situation, and it’s worth doing before you decide.

One more angle worth knowing: under current federal law, heirs generally receive a stepped-up basis when they inherit property, which can wipe out a gain that was deferred through earlier exchanges. That’s why some owners exchange more than once and never sell in a taxable sale. Whether that fits you depends on your age, your family, and how long you really want to keep managing property.

Where Selling for Cash Fits

A 1031 exchange works the same whether your buyer pays cash or uses a loan. What matters is that the proceeds go to the QI. A cash buyer can help with timing, since there’s no lender delay that could push your closing and your 45-day clock out of sync with the property you want to buy. If your rental has tenants, read our guide on selling a tenant-occupied property in Los Angeles before you set a timeline.

When Selling Outright Beats a 1031

A 1031 exchange makes sense when you want to keep owning investment property. It’s often the wrong move when:

You’re done being a landlord and don’t want another property to manage
Your gain is small, or you have losses that can offset it
You need cash for retirement, a business, or family needs
You’d be rushed into buying a property you don’t really want just to hit the 45-day deadline
The property was your primary residence for at least two of the last five years, so part of the gain may be excluded

On that last point, see our article on the capital gains exclusion when selling a California home. And if you’re weighing whether to keep a rental at all, our look at whether small landlords should hold or sell under LA rent caps may help.

Common Questions

Can I do a 1031 exchange into property in another state?

Yes. Federal rules allow it. Just remember California’s clawback rule and the yearly FTB 3840 filing.

Can I move into the replacement property later?

The property needs to be held for investment when you acquire it. Converting it to a personal residence right away can put the exchange at risk. Talk to your CPA before making plans like this.

What happens if I miss the 45-day deadline?

The exchange generally fails, and the sale is treated as a taxable sale. Have your replacement options lined up before you close.

Selling Your Rental

Whether you’re doing an exchange or just want to be done, Cash Home Buyers CA buys rental property across California, with or without tenants. We either buy directly or bring a vetted cash buyer, and we can close on a date that fits your QI’s timeline. Talk with your CPA and qualified intermediary first, then call us at (424) 435-2326 or request a no-obligation offer online.

1031 Exchange on a California Rental Property: What It Requires