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A 1031 exchange, named after Section 1031 of the Internal Revenue Code, lets a real estate investor sell investment property and defer the capital gains tax by reinvesting the proceeds into "like-kind" replacement property. The tax is deferred, not eliminated — it carries forward into the new property's cost basis.
For investors who keep upgrading properties over a career, 1031 exchanges can mean decades of compounding without paying capital gains tax. If the property is held until death, heirs receive a stepped-up basis and the deferred gain is permanently eliminated. It's one of the most powerful tax tools in the real estate investor's toolkit — and one of the most ruthlessly strict on timing.
How a 1031 Exchange Works
Four steps. The sequence is fixed — doing them out of order disqualifies the exchange.
Engage a QI before closing
Sign an exchange agreement with a Qualified Intermediary (QI) before you close on the sale of your relinquished property. If you close first and try to add the QI afterward, the exchange is already dead.
Sell the relinquished property
Close the sale. The proceeds go directly to your QI — you never touch the money. Even one day of "constructive receipt" in your account disqualifies the entire exchange and makes the gain taxable.
Identify replacements (45 days)
Within 45 calendar days, deliver a written, signed identification of potential replacement properties to your QI. Identifications must be specific — street address or legal description, not "a duplex in Phoenix."
Close on replacement (180 days)
Close on the replacement property within 180 days of the sale, or by your tax filing deadline (whichever is earlier). If the deadline falls after April 15, file an extension to preserve the full 180 days.
The Critical Deadlines
Two non-negotiable clocks, both starting the day after the sale closes.
Identification Period
To deliver a written, signed list of potential replacement properties to your QI. Calendar days, including weekends and holidays.
Exchange Period
To close on one or more of the identified properties. Or your tax filing deadline if earlier — file an extension to preserve the full 180.
No Extensions for Any Reason
- Not for lender delays. Even if your bank's processing pushes closing past day 180, the exchange fails.
- Not for illness, family emergencies, or business problems.
- Not for the seller backing out of your replacement property. Always identify backup options.
- The only exception: presidentially declared disasters in affected areas, with specific IRS guidance.
- Plan for slippage. Have your QI engaged, replacement candidates identified, and lender pre-approval in place well before day 30.
The Three Identification Rules
By day 45, you must commit to potential replacements under one of these rules. Pick one.
Three-Property Rule
Identify up to 3 properties of any value, with no limit on total. You can close on one, two, or all three of them within the 180-day window.
The most common choice for individual investors. Simple, flexible, and leaves room for one or two backups if the primary deal falls through.
200% Rule
Identify any number of properties, as long as their combined fair market value does not exceed 200% of the relinquished property's value.
Useful when you want to acquire multiple smaller properties — for instance, selling one apartment building and buying several rental houses.
95% Rule
Identify any number of properties of any value — but you must actually acquire at least 95% of the total identified value within the 180 days.
A safety net used rarely, and risky — if even one identified property falls through and pushes you below 95%, the whole exchange fails.
What Qualifies as "Like-Kind"
The 2017 Tax Cuts and Jobs Act limited 1031 exchanges to real property only. Personal property (equipment, art, vehicles) no longer qualifies.
Like-Kind Real Property
All U.S. real estate held for productive use in a trade or business, or for investment, is "like-kind" to all other U.S. real estate held for the same purpose. Geography and property type don't matter.
- Rental house ↔ commercial building
- Apartment complex ↔ raw land
- Farmland ↔ warehouse
- Multifamily ↔ retail strip mall
- Investment condo ↔ office building
- Vacation rental (genuinely rented) ↔ storage facility
Excluded Property
Specific exclusions in the statute, plus the 2017 limitation to real property only.
- Primary residences (use the Section 121 exclusion instead)
- Vacation homes you don't actually rent out
- Property held for resale (inventory, flips)
- Foreign real estate (not like-kind to U.S. real estate)
- Stocks, bonds, partnership interests
- Equipment, vehicles, art (excluded since 2017)
The Qualified Intermediary's Role
Why you can't just sell, deposit the check, and use the money to buy the replacement yourself.
Why a QI is required
The IRS treats any moment you have control over the sale proceeds as "constructive receipt" — meaning you sold the property and bought another, which is a fully taxable transaction. The Qualified Intermediary's only job is to receive the proceeds at closing, hold them in escrow, and forward them directly to the closing of the replacement property — so you never legally or practically touch the cash.
The QI also prepares the exchange documents, executes the assignments of contract rights, and creates the paper trail the IRS requires under the safe-harbor regulations.
Who can and can't be your QI
Federal regulations specifically disqualify the following from acting as your QI:
Yourself or anyone you control. A family member. Your attorney, real estate agent, accountant, or other professional who has provided you services in the past 2 years (with narrow exceptions for routine financial services). The QI must be an independent third party whose only role in your transaction is facilitating the exchange.
The unregulated-industry problem
The QI industry has no federal license, no bonding requirement under federal law, and minimal oversight in most states. There have been multiple high-profile failures over the years where QIs went bankrupt or commingled client funds, leaving exchangers without their proceeds and without a completed exchange.
When choosing a QI, look for: fidelity bond and errors-and-omissions insurance with substantial coverage limits; segregated, qualified escrow accounts (not commingled with the QI's operating funds or other clients); dual-signature wire requirements; a track record of at least 5–10 years; and ideally membership in the Federation of Exchange Accommodators (FEA).
Types of 1031 Exchanges
The structure changes based on the sequence and the kind of replacement property.
Delayed (Forward) Exchange
You sell first, then identify and close on a replacement within 45 / 180 days. Roughly 90%+ of all 1031 exchanges are this type. The structure most QIs are built around.
Simultaneous Exchange
Both properties close on the same day. The original form of a 1031 — rare today because synchronizing two closings is hard. Usually structured through a QI anyway, for safe-harbor protection.
Reverse Exchange
You buy the replacement first, then sell the relinquished property within 180 days. Useful in competitive markets where you can't risk losing a property. More expensive — requires an Exchange Accommodation Titleholder (EAT) to "park" title.
Improvement / Build-to-Suit
Use exchange proceeds to build or improve the replacement property before taking title. Only materials installed and labor performed before you take title count toward the exchange value. Complex and tightly time-bound.
Delaware Statutory Trust
A DST holds fractional interests in real estate that qualify as replacement property. Lets you 1031 into a passive, professionally-managed share of large commercial property — useful for investors winding down active management.
Tenant-in-Common
Co-ownership structure where multiple investors hold direct, separate fractional interests in a property. Used for 1031 exchanges into larger properties than an individual could buy alone. Less common since DSTs became prevalent.
Boot — When You DO Pay Tax
The most common reason "tax-deferred" exchanges end up partially taxable.
What boot is
Boot is any value you receive in the exchange that isn't like-kind replacement property. Boot is taxable in the year of the exchange — the rest of the gain is still deferred, but the boot portion isn't.
The two common forms:
Cash boot — any leftover proceeds the QI returns to you because you bought a less-expensive replacement. If you sell for $500,000 and buy for $450,000, the $50,000 difference is cash boot, taxable as gain.
Mortgage boot (debt relief) — if your new mortgage is smaller than your old mortgage, the IRS treats the difference as if you received cash. If you paid off a $300,000 mortgage on sale and only took on a $250,000 mortgage on the replacement, that's $50,000 in mortgage boot.
To avoid boot: buy equal or up in value, and replace equal or more debt (or add cash to make up the difference). This is sometimes called the "equal-or-up" rule.
When a 1031 Makes Sense — and When It Doesn't
Deferral is powerful, but it's not always the right move.
1031 makes sense when…
- You plan to keep investing in real estate — not exit the asset class
- You're upgrading to a higher-value property or consolidating multiple smaller ones
- You're rebalancing geographies — selling in a high-tax state, buying in a low-tax state (with state clawback rules considered)
- You're shifting from active to passive via a DST — common pre-retirement move
- You plan to hold the next property until death, so heirs get stepped-up basis and the deferred gain is permanently eliminated
1031 may NOT make sense when…
- You want to exit real estate entirely — deferral just delays the tax bill
- Your gain is small — QI fees ($800–$2,500+) and the rushed timeline may not be worth it
- You haven't found a replacement and you're trying to use 1031 to force a decision under pressure
- You need the cash — any boot you take is taxable
- You're in a low-income year where the gain might be taxed at 0% anyway under the long-term capital gains brackets
- The replacement is in worse condition than the relinquished — depreciation recapture math gets messy
Common Pitfalls That Kill Exchanges
- Engaging the QI after closing the sale. The QI must be in place before the relinquished property closes. After is too late.
- Taking constructive receipt. Wire to your personal account, even briefly, kills the exchange.
- Missing the 45-day or 180-day deadline by one day. The IRS does not negotiate.
- Vague identification. "A duplex in Phoenix" doesn't qualify — you need a street address or legal description.
- Identifying more properties than allowed under your chosen rule.
- Buying from a related party who immediately sells — triggers a 2-year holding requirement and IRS scrutiny.
- Underestimating boot — buying down in value or replacing less debt than you paid off creates an unexpected tax bill.
- Picking a QI without a fidelity bond or segregated accounts. Several QI failures over the years have left exchangers without their funds and with a tax bill.
Frequently Asked Questions
The questions investors ask most often before their first 1031.
Can I do a 1031 exchange on a primary residence?
No. 1031 exchanges only apply to property held for productive use in a trade or business, or for investment. Your primary residence doesn't qualify. However, primary residences have their own tax break: Section 121 excludes up to $250,000 of gain ($500,000 married filing jointly) if you've lived in the home for at least 2 of the last 5 years. The two breaks can sometimes be combined when a former rental becomes a primary residence (or vice versa), but the timing and proration rules are intricate — talk to a tax pro.
How much does a 1031 exchange cost?
The QI fee is the main direct cost — typically $800–$1,500 for a standard delayed exchange, more for reverse or improvement structures ($3,500–$7,500+). Beyond that, you pay normal closing costs on both transactions (title, escrow, transfer tax, lender fees) and any additional legal or tax-advisor fees. Compared to the tax you defer — often tens or hundreds of thousands of dollars — the QI fee is small.
What happens to my cost basis?
Your cost basis carries over from the relinquished property into the replacement, with adjustments for any additional cash you put in, debt changes, and boot received. This means your replacement property has an artificially low basis — you'll pay more in depreciation recapture and capital gains when you eventually sell without exchanging. Many investors keep exchanging for decades and then hold until death, when heirs receive a stepped-up basis and the deferred gain is permanently eliminated.
Do states recognize 1031 exchanges?
Most states follow federal 1031 treatment, but a handful have clawback rules: California, Oregon, Massachusetts, and Montana require ongoing reporting and may eventually tax the deferred gain if you later sell the replacement without exchanging again. Pennsylvania historically didn't recognize 1031 at the state level for individuals (though this changed for tax years 2023 and later). If you're moving across state lines as part of the exchange, the state tax angle is worth special attention — ask your CPA.
Can I exchange a property I own with a partner?
Real estate held in a partnership or multi-member LLC raises complications, because the partnership owns the property, not the individual partners. A 1031 exchange must be done at the entity level — all partners participate, or none do. "Drop and swap" strategies, where the partnership distributes property to individual partners before the sale so each can do their own 1031, are common but face IRS scrutiny over the holding period and intent. This is one of the trickiest areas of 1031 practice and genuinely requires a tax attorney.
What if my replacement property falls through after I've identified it?
If you used the 3-property rule and identified backups, you can close on a different identified property within the 180 days. If you only identified one and it falls through, the exchange fails — the QI returns your funds and you pay capital gains tax on the sale. Always identify backup options within your chosen rule, even if your primary deal looks solid. Smart practice: identify up to 3 properties, with the primary plus 2 backups under contract or pre-negotiated.
Authoritative Resources
Official sources to learn more — no affiliate links, no upsells.
IRS Like-Kind Exchange Guide
The IRS's own plain-language overview of 1031 exchanges for real estate. The authoritative starting point.
irs.govIRS Form 8824
The Like-Kind Exchanges form you (or your CPA) file with your tax return to report a completed 1031. Includes the instructions document.
irs.gov/form-8824Federation of Exchange Accommodators
The QI industry's national trade association. Their member directory is a reasonable starting point for finding established Qualified Intermediaries.
1031.orgIRS Fact Sheet on 1031
Older but still useful technical fact sheet with examples of basis calculation, boot, and partial exchanges. Good for understanding the math.
irs.gov/pub/irs-newsFind a Tax Attorney
Our legal services page includes links to the ABA Lawyer Referral, FindLaw, and other resources for locating an attorney experienced in 1031 exchanges.
Legal ServicesMortgage Calculator
Run the numbers on your replacement property's financing. Useful when evaluating whether the math works on the new mortgage.
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