The 1031 exchange, in Los Angeles.

If you've owned an investment property in Los Angeles for any meaningful length of time, you're probably sitting on a meaningful gain. A duplex bought in West Adams in 2015 for $650,000 might be worth $1.4M today; a small Mid-City apartment building purchased a decade ago has likely doubled. Sell it without planning, and federal capital gains, depreciation recapture, California state income tax, and (above certain thresholds) Measure ULA can take a third or more of the proceeds off the table. The single most useful tax provision in real estate — Section 1031 of the Internal Revenue Code — is what allows you to defer most of that, indefinitely, by rolling the gain into the next property.

This primer is the working version for LA investors. It covers what a 1031 exchange actually is, the two deadlines that run everything, the California-specific wrinkles (the clawback, FTB Form 3840, mandatory withholding), how it interacts with Measure ULA, and the common LA scenarios where it pays off — and the cases where it isn't the right move. It's not a substitute for a conversation with a CPA and a qualified intermediary; it's the read that lets you have that conversation with context.

What a 1031 Exchange Actually Is.

A 1031 exchange, named after Section 1031 of the Internal Revenue Code, lets a real estate investor sell an investment or business-use property and reinvest the entire proceeds into another like-kind investment property, deferring federal capital gains tax, depreciation recapture, and (in most states, including California) state income tax on the gain. The investor doesn't avoid the tax forever — the gain is deferred, not eliminated — but it can be deferred again, and again, by rolling each subsequent sale into another exchange. If held until death, the heirs receive a stepped-up basis, and the deferred gain effectively disappears.

Three structural requirements define the exchange. Like-kind: both properties must be real property held for investment or business use. The like-kind standard is broader than most people think — raw land for an apartment building, an LA duplex for a Phoenix retail strip, a rental SFR for a DST (Delaware Statutory Trust) interest in commercial real estate all qualify. What doesn't qualify: a primary residence (use Section 121 exclusion instead), a property held for "sale" (flips, dealer property), and personal-use vacation homes that don't meet the rental-use thresholds.

Same taxpayer rule: the legal entity that sold the relinquished property must be the same entity that acquires the replacement. An LLC sells, the same LLC must buy. A trust sells, the same trust must buy. This often becomes the planning bottleneck on partnership-held assets.

Qualified intermediary: the proceeds from the sale cannot touch the investor's hands or bank account. A third party, the QI, holds them between transactions. Constructive receipt — even briefly — invalidates the exchange.

The Two Deadlines That Run Everything.

Once you close on the relinquished property, two clocks start running — and both are absolute. No extensions for weekends, holidays, escrow delays, lender issues, or natural disasters. Missing either deadline by a single day collapses the exchange and triggers full tax on the gain.

The 45-day identification rule. Within 45 calendar days of closing on the sale of the relinquished property, you must identify potential replacement properties in writing — usually delivered to your qualified intermediary. The standard mechanism is the Three-Property Rule: identify up to three candidate properties, of any value. There's also a 200% Rule (any number of properties, as long as their combined value doesn't exceed 200% of the relinquished sale price) and a 95% Rule (any number with no value cap, but you must acquire 95% of the identified value). Most LA investors use the Three-Property Rule.

The 180-day completion rule. You must close on the replacement property within 180 days of the relinquished sale — OR by the tax filing deadline for the year of the sale, whichever comes first. This is the Q4 trap: if you sell after October 16, the default deadline becomes April 15 of the next year (shorter than 180 days). Filing a tax extension before April 15 restores the full 180-day window. This is the single most expensive technicality in 1031 land; a planning conversation with your CPA before the relinquished sale closes prevents it.

The Qualified Intermediary — And Why It Matters Before the Sale.

The qualified intermediary is the third party who holds your sale proceeds between transactions. They're not your agent, not your CPA, not your attorney — they exist for one purpose: to keep you from having constructive receipt of the funds, because the moment you do, the exchange dies.

Two practical points. First, the QI must be engaged before the relinquished property closes. You cannot retroactively designate a QI on a sale that already happened — if the proceeds go to your account first, the exchange is invalid, full stop. Second, the QI has custody of your money for the entire exchange window. Vet them. Use an established firm with insurance, segregated client accounts, and a clean track record. The 1031 industry has had several high-profile QI failures over the years where investors lost their funds.

California's Specific Rules — The Clawback.

California follows federal 1031 framework but adds three state-specific layers that LA investors should understand.

The clawback rule. When you exchange a California property for an out-of-state replacement — an LA duplex for a Texas apartment building, say — California's Franchise Tax Board (FTB) keeps tracking the deferred gain. When you eventually sell that out-of-state property without doing another 1031 exchange, California will tax the original deferred gain at California rates — even if you've moved out of state by then. The clawback ensures California eventually collects on gains accumulated on California property. To enforce tracking, FTB requires you to file Form 3840 annually while holding the out-of-state replacement property. Skipping the filing doesn't make the clawback go away; it just makes it harder to defend later.

Mandatory withholding (Form 593). California requires the escrow company to withhold 3.33% of the sale price at closing as a default. For a valid 1031 exchange, you (or your QI) file Form 593 to claim an exception — but the form must be filed properly at closing, and the exchange must be for full value to qualify for the full withholding exemption.

Same federal rules, no California carve-outs. Some states have proposed deviating from federal 1031 treatment. California has not — the exchange is recognized at the state level, same 45/180 timelines, same qualified intermediary requirement, same like-kind standard.

Measure ULA — A 1031 Does Not Defer It.

This is the most common misconception we hear from LA investors at the top of the market. A 1031 exchange defers federal capital gains and California state income tax. It does not defer or avoid local transfer taxes — including Measure ULA.

If you sell a relinquished property in the City of Los Angeles for above approximately $5.32M (the 2026-adjusted lower threshold), ULA's 4% transfer tax is owed at closing — before any of the proceeds even reach the qualified intermediary. Above $10.64M, the rate is 5.5%. On a $10M LA apartment building, ULA alone is $400,000+. The 1031 doesn't help with that piece; it only helps with the gain itself.

Two practical implications: (1) for high-end LA investors, the math of selling vs. holding shifts more than 1031 alone would suggest, because ULA is a one-time hit that recurs on every sale; (2) if you can structure an exchange that doesn't cross the ULA thresholds — selling multiple smaller properties instead of one large one, for example — the total tax cost can be meaningfully lower.

Common LA Investor Scenarios.

Three patterns drive most LA 1031 exchanges we see in practice.

The trade-up. A West Adams or Culver City duplex purchased in the 2010s for $600K–$900K has appreciated to $1.4M–$2.2M, and the owner wants to convert that equity into a larger asset — a fourplex, a small apartment building, or two SFR rentals in a higher-growth submarket. A 1031 lets the entire equity (less ULA where applicable and transaction costs) roll forward without tax, preserving capital that would otherwise be lost to federal capital gains, depreciation recapture, and state tax.

Geographic diversification. An LA investor sells a fully-appreciated rental and exchanges into an out-of-state market with better cash-flow yield (Texas, Arizona, Nevada, the Carolinas) while keeping their LA primary residence. California's clawback is the cost: the deferred gain stays tracked, and CA will eventually collect when the out-of-state replacement is sold without another exchange. Many investors handle this by chaining exchanges indefinitely, then relying on the stepped-up basis at death — which, for now, eliminates the deferred gain entirely.

Type change. A single-family rental that's become more work than it's worth gets exchanged into a passive investment — a triple-net commercial lease, a DST (Delaware Statutory Trust) interest, or a quality multifamily property with professional management. The 1031 enables the strategic shift without the tax friction.

The Costs of an Exchange.

A 1031 exchange has out-of-pocket costs — modest relative to the tax it defers, but real. Qualified intermediary fees in 2026 typically run $800–$1,500 for a standard delayed exchange, more for reverse exchanges or improvement exchanges. CPA preparation of Form 8824 (federal) and FTB Form 3840 (California, ongoing) adds a few hundred dollars per year. Legal review of complex partnership structures, if needed, can run $2,000–$10,000.

Compare that to the tax it defers. On a $1M gain in an LA investment property held by a California resident, the combined federal capital gains (20%), Net Investment Income Tax (3.8%), depreciation recapture (25% on the recapture portion), and California income tax (up to 13.3%) can easily exceed 30% of the gain — $300,000+ on a $1M gain. Against that, $1,500–$2,000 in exchange costs is a rounding error.

When NOT to Do a 1031.

Two scenarios where a 1031 isn't the right tool. Late-life estate planning. If the goal is to pass property to heirs, often the right strategy is to hold to death and let the stepped-up basis eliminate the deferred gain entirely. A 1031 in your 80s adds complexity without much benefit — the basis step-up at death does the same thing without the 45/180 sprint.

Cash-out events. A 1031 is an exchange, not a cash extraction. If you actually want to take chips off the table — reduce real estate concentration, fund a major life expense, retire — pulling cash from the sale is "boot" and is immediately taxable. Sometimes paying the tax is the right answer, particularly if you have offsetting losses, are in a lower-income year, or are restructuring for non-tax reasons.

The general rule: 1031 if you want to stay in real estate with the same after-tax basis; pay the tax if you want to leave real estate or restructure significantly.

Used well, the 1031 exchange is one of the most efficient wealth-preservation tools in the tax code, and it's available to any investor with an investment property, not just institutions. Used poorly — with missed deadlines, weak qualified intermediaries, or scenarios that don't actually need the deferral — it adds cost and complexity without benefit. The decision of whether to use one starts with a conversation with your CPA. The execution starts with the qualified intermediary engagement, before the relinquished property closes. And on the LA real estate side, an agent who knows the off-market inventory in the submarkets you're targeting can dramatically expand what's identifiable inside the 45-day clock — which is often the difference between a clean exchange and a panicked one.

Section 1031 rules cited reflect federal law and California state law as of May 2026. ULA mansion-tax thresholds are adjusted annually and reflect current City of Los Angeles measurements. Tax rates and rules change; individual situations vary widely. This article is informational and educational only, is not tax, legal, or financial advice, and is not a substitute for advice from a qualified CPA or tax attorney. Always consult your tax advisor and qualified intermediary before initiating a 1031 exchange.