Investor · 10 min read
1031 Exchange in California (2026): Rules + Financing
A 1031 exchange lets a real estate investor defer capital gains tax by reinvesting the proceeds from a sold investment property into a new like-kind one. Named after Section 1031 of the Internal Revenue Code, it swaps a taxable sale for a continued investment, so the gain rolls forward instead of being taxed today. The catch is timing and structure: strict IRS deadlines, a Qualified Intermediary who holds the money, and, in California, extra state rules that follow the gain even across state lines.
What a 1031 exchange actually is
A 1031 exchange is a tax-deferral tool, not a tax loophole and not tax-free. When you sell an investment or business-use property at a gain, the IRS normally taxes that gain in the year of sale. Section 1031 lets you postpone the federal capital gains tax, plus depreciation recapture, if you reinvest the proceeds into another qualifying property and follow the rules exactly.
The gain does not disappear. Your tax basis carries over into the replacement property, so the deferred gain sits there until a future taxable sale. Investors chain exchanges over decades to keep capital working, and if the property is still held at death, heirs may receive a stepped-up basis. That is the long game: defer, reinvest, repeat.
Since the 2017 tax law, only real property qualifies. Personal property, equipment, and vehicles no longer count. The property sold (the relinquished property) and the property bought (the replacement property) must both be held for investment or productive use in a trade or business. Your primary residence and property held primarily to flip do not qualify.
The core IRS rules and deadlines
Four rules do most of the work in a standard exchange:
- Like-kind. For real estate this bar is broad. Any U.S. real property held for investment is like-kind to any other. You can trade a duplex for raw land, an apartment building for a retail strip, or a rental condo for a share in a larger asset. Foreign property is not like-kind to U.S. property.
- 45-day identification. From the day you close the sale of the relinquished property, you have 45 calendar days to identify potential replacement properties in writing to your Qualified Intermediary. No extensions for weekends or holidays.
- 180-day closing. You must close on the replacement property within 180 calendar days of the sale, or by your tax return due date for that year (including extensions), whichever is earlier. The 45 days count inside the 180, not on top of it.
- Qualified Intermediary. You cannot touch the sale proceeds. A Qualified Intermediary (QI), also called an accommodator, holds the funds between the sale and the purchase. If cash hits your bank account or you have the right to receive it, the exchange fails.
Two more requirements govern how much you must reinvest: to fully defer, you generally buy replacement property of equal or greater value, reinvest all the net proceeds, and replace any debt that was paid off on the sale with equal debt or new cash. Fall short on value, equity, or debt, and the shortfall becomes taxable boot.
Identification rules: the 3-property, 200%, and 95% tests
Within the 45-day window you must name your candidate properties, and the IRS caps how many and how much you can identify. You satisfy one of three tests:
| Rule | How many you can identify | The catch |
|---|---|---|
| 3-property rule | Up to three properties, any value | Most common; you can close on one, two, or all three |
| 200% rule | Any number of properties | Their combined fair market value cannot exceed 200% of the relinquished property's sale price |
| 95% rule | Any number, any value | You must actually acquire at least 95% of the total value you identified |
Most investors use the 3-property rule because it is the simplest and leaves room to walk away from a deal that falls apart. The identification must be specific and in writing, signed, and delivered to the QI by midnight on day 45. A street address or legal description is required; vague descriptions are rejected.
The main types of exchange
Not every exchange is a simple sell-then-buy. Four structures cover most situations:
- Delayed (forward) exchange. The standard version. You sell first, the QI holds the proceeds, and you buy the replacement within the 45/180-day windows. The vast majority of exchanges are delayed.
- Reverse exchange. You buy the replacement property before selling the old one, useful in competitive markets where you cannot risk losing the target. An Exchange Accommodation Titleholder parks title to one property until the sale closes. Reverse exchanges are more complex and more expensive, and financing them is harder because the parking entity holds title.
- Improvement (construction) exchange. Lets you use exchange funds to build on or renovate the replacement property. The improvements must be completed and the property received within the 180 days for that value to count toward deferral.
- Simultaneous exchange. Both closings happen the same day. Rare today because the delayed structure is safer and more flexible.
Each structure has its own documentation and its own financing wrinkles. Reverse and improvement exchanges in particular need a lender who understands the parking arrangement and the tight clock.
California specifics: FTB withholding and the clawback
California layers state rules on top of the federal ones, and they trip up out-of-state buyers most often.
FTB withholding. When California real estate is sold, the buyer or escrow is generally required to withhold 3.33% of the sale price (or an alternative amount based on the gain) for the Franchise Tax Board. In a properly structured 1031 exchange, you can claim an exemption from this withholding by certifying on the FTB forms that the sale is part of a like-kind exchange. Get the exemption paperwork to escrow before closing, or the withholding comes out of your proceeds.
The California clawback (Form FTB 3840). This is the rule investors miss. If you defer California-source gain and buy replacement property outside California, the state does not forgive its share. California continues to track that deferred gain and requires you to file Form FTB 3840 every year for as long as the gain remains deferred. When you eventually sell the out-of-state replacement in a taxable transaction, California taxes the gain that originally accrued here. Skip the annual 3840 filing and the FTB can estimate the tax and assess it. The clawback means you cannot 1031 your way out of California income tax simply by moving the money to Texas or Nevada.
Boot and how to fully defer
"Boot" is any value you receive in the exchange that is not like-kind property. Boot is the taxable part, and it comes in two flavors:
- Cash boot. Net sale proceeds you do not reinvest. If you sell for 800,000 and buy for 750,000, that 50,000 difference is cash boot and is taxed.
- Mortgage (debt) boot. Debt relief that is not replaced. If you paid off a 400,000 loan on the sale but only take on 300,000 of new debt (and add no cash to cover the gap), the 100,000 of reduced debt is mortgage boot and is taxed, even though no cash came to you.
To defer the entire gain, three things must be equal or greater on the replacement side: total value, the equity you reinvest, and the debt you carry. This is exactly why financing matters. If you paid off a large loan on the sale, you often need a comparable loan on the replacement to avoid mortgage boot, not because you lack the cash, but because replacing the debt is what keeps the deferral whole.
Financing the replacement with a DSCR loan
The replacement purchase usually needs a mortgage, and the 1031 clock is unforgiving. A conventional investment loan can take 45 to 60 days and asks for tax returns, W-2s, and debt-to-income underwriting, which is a poor fit for an investor whose income sits in K-1s and Schedule E and whose deadline is fixed.
DSCR loans are built for this. A Debt Service Coverage Ratio loan qualifies on the replacement property's rental income, not your personal income. There are no tax returns and no personal DTI calculation; the underwriter checks that the rent covers the mortgage payment (typically a DSCR of 1.0 to 1.25 or better). That means faster closings, often inside the 180-day window with room to spare, and no scramble to document personal income.
DSCR loans also help you solve the boot problem. Because you can size the new loan to match or exceed the debt you paid off, you replace the relinquished debt and avoid mortgage boot while keeping more cash in reserve. They work for single rentals, multifamily, and short-term rentals, and they close in the name of an LLC, which many investors prefer for a 1031 hold.
Save Financial arranges DSCR and other investor financing structured to close on 1031 timelines. With offices in Newport Beach and Marina del Rey, we coordinate with your Qualified Intermediary and escrow so the loan is not the thing that blows your 45- or 180-day deadline. If you know your sale is coming, get pre-underwritten early so the replacement side is ready the moment you identify.
Common mistakes that blow the exchange
Most failed exchanges fail for avoidable reasons:
- Touching the money. Taking receipt of proceeds, even briefly, disqualifies the exchange. The QI must be engaged before the sale closes, not after.
- Missing the 45-day identification. The window is hard. Line up candidate properties before you sell, not after.
- Buying down in value or debt. Cash boot and mortgage boot quietly create a tax bill even when the exchange otherwise works. Size the replacement and its financing to match.
- Financing that closes too slowly. A conventional loan that slips past day 180 kills the deferral. Match the loan product to the deadline.
- Wrong intent. Property held to flip, or a personal residence, does not qualify. The relinquished and replacement properties must both be held for investment.
- Ignoring Form FTB 3840. California investors who buy out of state must file the 3840 annually or face assessment under the clawback.
This article is educational and is not tax or legal advice. 1031 exchanges are technical, and the details of your situation change the answer. Engage a qualified CPA or tax advisor and a Qualified Intermediary before you sell, and let them structure the transaction. Save Financial arranges financing; we do not provide tax advice.
About this article: Save Financial publishes California mortgage and real-estate-investing guides. We are a California-licensed mortgage brokerage (NMLS #377740, DRE #01875766) serving all 58 counties, specializing in DSCR and hard money loans for investors. For a real quote, apply online or call 949-379-5320.