The full reference on tax-deferred like-kind exchanges. Timelines, qualified intermediaries, boot, depreciation recapture, DSTs, reverse exchanges, estate planning, and the state-level gotchas that surprise investors at tax time.
A 1031 exchange defers federal capital gains tax and depreciation recapture when you swap one investment property for another of equal or greater value through a qualified intermediary. Both clocks start the day your relinquished property closes.
45 days to identify replacement properties in writing to your QI. 180 days to close on one of them. Weekends count, the IRS does not extend them outside federally declared disasters, and missing either deadline kills the deferral. Plan to identify by day 40 and close by day 170.
A 1031 exchange lets you sell an investment property without paying federal capital gains tax at the time of the sale, provided you reinvest every dollar into a replacement through a qualified intermediary. The name comes from Internal Revenue Code Section 1031. The 2017 TCJA narrowed it to real property only, so equipment and personal property no longer qualify. For rental investors, nothing changed.
The core idea is deferral, not forgiveness. Two tax bills are waiting when you sell: capital gains tax on the appreciation, and depreciation recapture at a flat 25 percent federal rate on every dollar of depreciation you claimed (or were allowed to claim). A landlord who bought a four-plex in 2012 for 400k and sells for 900k in 2026 can easily face a combined federal hit north of 150k before state tax. A 1031 pushes that bill into the future and keeps 100 percent of your equity in the next deal.
Who qualifies is simpler than most think. Both properties must be real property held for productive use in a trade or business or for investment. Single-family rentals, multifamily, commercial, industrial, raw land, and qualifying fractional interests all count. Primary residences do not. Flips you bought with intent to resell do not. The 1031 exchange glossary entry has the one-paragraph version.
The typical 1031 investor is a working operator with two to twenty rentals who wants to roll appreciated equity into a better deal without handing a third to the IRS.
Everything downstream collapses into four rules. Miss any one and the exchange fails, which means the full gain becomes taxable in the year of the relinquished sale.
From the day your relinquished property closes, you have 45 calendar days to deliver a written, signed identification of replacement properties to your qualified intermediary. The identification must be unambiguous, typically a full street address. No verbal identification, no "a duplex in Phoenix." If day 45 lands on Christmas, the deadline is still Christmas.
From that same closing date, you have 180 calendar days (or the due date of your tax return for that year, whichever is earlier) to close on one or more of the properties you identified. Closing means recorded deed and funded purchase, not contract signing or earnest money deposit.
For real estate, like-kind is extraordinarily broad. Any real property held for investment can be exchanged for any other real property held for investment. A single-family home can become a warehouse. A strip mall can become timberland. What is not like-kind: stocks, partnership interests in an operating entity, notes, REIT shares (unless you use a specialty structure), and any property held primarily for resale.
You cannot touch the money. Not in your personal account, not in an LLC account you control, not for an hour on the way to the next closing. A QI is an independent third party who takes assignment of your sale contract, receives proceeds at closing, holds them in a segregated account, and wires them to the replacement closing on your instruction. Constructive receipt kills the exchange, and this is the rule investors violate most often by accident.
Section 1031 supports four distinct structures, each with a different risk profile and fee schedule.
| Structure | When you buy | QI fee range | Best for |
|---|---|---|---|
| Forward (delayed) | After you sell | 1,000 to 1,500 | The default. Sell first, identify within 45, close within 180. |
| Simultaneous | Same day as sale | 1,000 to 1,500 | Rare. Both closings at the same table. |
| Reverse | Before you sell | 5,000 to 15,000 | You found the deal first. An EAT parks it while you sell the relinquished. |
| Build-to-suit | Before build complete | 7,000 to 20,000 | Use proceeds to build or improve the replacement before taking title. |
The forward delayed exchange is the workhorse. Ninety percent of exchanges run this way: close your sale, QI takes the money, identify within 45, close within 180.
The reverse exchange flips the order. You find your replacement first, fund it through an exchange accommodation titleholder (EAT) that the QI sets up, then sell your relinquished property within 180 days to retire the parked position. This is how you avoid losing a hot deal to a faster buyer. The 180-day clock is just as unforgiving in the other direction. Mechanics in the reverse 1031 exchange guide.
The build-to-suit or improvement exchange lets you use exchange proceeds to fund construction or major improvements on the replacement before you take title. The EAT holds title during the build, and improvements made before your 180 days expire count toward the exchange value. Use it when the replacement as-is does not absorb enough proceeds. The build-to-suit walkthrough covers the rules and costs.
Pick the simplest structure that works. Every step up adds cost and legal exposure.
The 45-day rule has three sub-rules, and you pick which one to use. Most investors default to the three-property rule without realizing there are two alternatives.
Identify up to three replacement properties, no matter what they are worth. A 10-million apartment, a 2-million industrial park, and a 500k duplex, and you only have to close on one. This is the default path and gives you backup options.
Identify any number of properties, but their combined fair market value cannot exceed 200 percent of the sale price of your relinquished. If you sold for 800k, you can identify up to 1.6 million in total FMV across as many properties as you want. Useful when spreading proceeds across many smaller acquisitions.
Identify more than three properties with total FMV over 200 percent, but you must close on at least 95 percent of the identified value. Rarely used because it eliminates backup options.
Identification is a signed document delivered to the QI. No phone calls, no emails with "pretty sure about these three." The document has to be unambiguous (street address or legal description) and in your QI's hands by midnight of day 45 in your QI's time zone. You can revoke and re-identify as many times as you want before day 45, but once the clock hits zero your list is locked.
The single biggest cause of failed exchanges is investors who spend the first 30 days doing nothing, then discover on day 38 that their preferred replacement has structural problems. Work the list backwards. Three viable candidates by day 20, each under contract or in serious negotiation by day 35, file identification on day 40 with a five-day cushion. The 1031 exchange timer gives you the exact deadline dates from any start date.
Deep dive 1031 Exchange 45-Day Identification RulesThe 180-day clock sounds generous next to the 45, but it blows up more exchanges in practice. By day 45 you have a list. By day 180 you have funded wires and recorded deeds on at least one of those properties. In between sits appraisal, inspection, loan underwriting, title work, and seller cooperation.
The tax-year overlap is the wrinkle most landlords miss. The 180-day clock is actually "the earlier of 180 days or the due date of your federal return for the year of the sale." Close on November 15, 2026 and your 180-day mark is May 14, 2027, which is after your April 15 return due date. Without an extension your 180 days collapse to 150. The fix is Form 4868, filed before April 15.
Financing is the friction source that blows up the most exchanges. DSCR lenders run 30 to 45 days from application to fund, conventional investment loans run 45 to 60. If you are chaining acquisitions, the slowest loan controls your timeline. Start applications the week you identify, not the month.
PM-managed investors have a second timing problem. If your PM needs 60 days to turn a unit and 30 to market, you cannot start the 1031 clock until that dance ends. The practical operator view is at PM coordination timing.
Deep dive The 180-Day Closing Deadline and How to Protect ItThe QI is the linchpin of every delayed exchange, and where investors make their worst hiring decisions. The industry is lightly regulated: no federal license, no minimum capital requirement in most states, no universal bonding standard. You are wiring six or seven figures to a company and trusting them to hold it untouched for up to six months. Hire accordingly.
What a QI does: takes assignment of your sale contract, drafts the exchange documents, receives proceeds at closing, holds them in a segregated account, tracks your deadlines, processes your identification, and wires funds to the replacement closing on your instruction. A good QI also catches the small errors that would otherwise disqualify the exchange.
What a QI cannot do: give tax advice, tell you which property to buy, be a "related party" (your CPA, attorney, agent, or anyone who has worked for you in the last two years), or commingle funds with operating capital.
Five things to verify before you hire:
The full interview checklist is in the QI selection guide.
Deep dive How to Choose a 1031 Qualified IntermediaryThis is the section that costs investors the most money through bad assumptions. "1031 exchange" does not mean "zero tax." It means "deferred tax on the portion you actually exchanged." Any value you receive that is not like-kind real property is boot, and boot is taxable up to your realized gain.
Leftover proceeds. You sold for 600k and paid off a 200k loan, so your QI is holding 400k. If your replacement costs 350k, the QI wires 350k to the closing and sends the remaining 50k back to you. That 50k is cash boot, taxable in the year of the exchange.
Debt relief. You had a 300k mortgage on the relinquished. You buy a replacement with a 250k mortgage. The 50k of debt reduction is taxable even though you never saw a dollar of cash. Rule of thumb: your replacement's mortgage plus cash investment must equal or exceed the relinquished's mortgage plus sale proceeds. Match or exceed both value and debt, or you have boot.
Every year you owned the relinquished, you were allowed to depreciate 1/27.5 of the building value. Even if you did not claim it, the IRS treats you as if you did (the "allowed or allowable" rule). When you sell, the total depreciation claimed or claimable comes back as unrecaptured Section 1250 gain taxed at a flat 25 percent federal rate. A 1031 defers recapture along with capital gains, but only to the extent you do not generate boot. Boot triggers immediate recognition of recapture first, then capital gain. That 25 percent is higher than the 15 or 20 percent long-term rate most investors expect, which is why a 50k cash boot can produce a 12.5k federal tax bill plus state tax.
Run the numbers before you commit. The spoke post on boot and depreciation recapture works through three full numerical examples.
Deep dive 1031 Exchange Boot and Depreciation Recapture: The MathNot every exchange ends in another hands-on rental. A Delaware Statutory Trust (DST) is a legal structure the IRS blessed as qualifying replacement property under Revenue Ruling 2004-86. A DST holds institutional real estate (a stabilized apartment, a single-tenant industrial building, a medical office portfolio) and sells fractional beneficial interests to up to 499 investors. Buy a DST interest with exchange proceeds and the IRS treats it as a direct interest in the underlying real estate.
Why investors use DSTs:
The downsides are real. Fees are high (a 5 to 10 percent load plus ongoing management), you have no operational control, liquidity is effectively zero for 5 to 10 years, and sponsor risk is concentrated.
The long-term upside: many DSTs include a Section 721 UPREIT exit, where the sponsor exchanges the DST property into an operating partnership that feeds a public or private REIT. Your DST interest converts to REIT operating partnership units, which you can hold for income and eventually pass at death with a full step-up in basis. Full mechanics in the DST spoke post.
Deep dive 1031 Into a Delaware Statutory Trust: Structure and FeesThe interesting use of 1031 is not avoiding tax on a single sale. It is using deferral as a compounding engine across a decade of deals. I call this the equity cascade.
You buy a 200k property with 40k down and a 160k loan. Five years later it is worth 320k and you have paid the loan down to 145k, so you have 175k in equity. A straight sale costs you 30 to 45k in federal tax. A 1031 into a 400k replacement with a 250k loan keeps all 175k deployed. Your leverage ratio improves, cash flow scales with the larger asset, and you moved 175k across the board without the IRS taking a cut.
Do this three times in a career and you have compounded pre-tax dollars on pre-tax dollars at a clip post-tax sellers cannot match. The 30 to 45k per cycle that would have gone to the IRS is instead earning the same leveraged return as the rest of your equity.
Timing is the hardest part. Exchange when the relinquished has maxed out its appreciation curve, when you have identified a replacement with better unit economics, and when your financing environment is stable enough to close in 180 days. Trading into a trophy at peak prices with peak rates is how you end up with worse cash flow than you left.
My signals: rent-to-price below 0.6 on a stabilized property, cap rate compression below 5 percent, a superior replacement market I already know, and at least 40 percent equity in the relinquished. Without three of four, I hold another year.
Deep dive How to Scale a Rental Portfolio with 1031 ExchangesHere is the part of the story that quietly makes the whole strategy work. Section 1014 gives your heirs a step-up in basis at the date of your death. Whatever your adjusted basis was the day before you died, your heirs' basis resets to fair market value. All the deferred capital gain and depreciation recapture you accumulated over decades evaporates at that moment. Your heirs can sell the next day at market price and owe essentially zero federal capital gains tax.
Operators call this "swap till you drop." Buy property, depreciate it, exchange for a larger one, depreciate the larger, exchange again, hold the last until you pass, hand it to heirs with a stepped-up basis. Every dollar of deferred tax becomes a permanent tax reduction for the next generation. This is not a loophole. It is the explicit intersection of Sections 1031 and 1014, and it has been the standard wealth-transfer playbook for multi-generation real estate families since 1921.
Once you are past 55 or 60, the calculus changes. If your deferred gain is 800k, the question is no longer "how do I minimize tax when I sell" but "do I sell at all, or hold and transfer." For most operators with meaningful accumulated gain, the answer is hold. Cash-out refinance to fund retirement income. Use a DST for passive income in the last decade. Let Section 1014 do the work.
Caveats: estate tax is separate from income tax, the federal exemption drops by half in 2026 under current law unless Congress acts, several state estate taxes have much lower thresholds, and the basis step-up only applies to assets in your taxable estate, so certain trust structures can inadvertently disable it. Full mechanics in the swap till you drop post.
Deep dive Swap Till You Drop: The 1031 Estate Planning StrategyFederal 1031 treatment is half the tax picture. Every state with an income tax has its own rules about whether it follows federal Section 1031 and how it handles exchanges that cross state lines. Investors who exchange out of California into Texas and assume they are done have a surprise waiting.
Most states conform cleanly. Sell a rental in Ohio and buy a replacement in Ohio and the state follows federal treatment. The issues start with two categories: non-conforming states and clawback states.
Non-conforming: Pennsylvania historically did not allow 1031 deferral at the state level for individuals, so PA residents exchanging PA property owed state income tax on the gain even when the federal exchange was valid. Recent legislation has aligned PA with federal treatment for property placed in service after specific effective dates, but legacy positions still matter and the mechanics differ for entities versus individuals.
Clawback states: California, Oregon, Massachusetts, and Montana let you defer state tax when you exchange, but track the deferred gain and tax it later if you sell a replacement located outside that state. California's FTB Form 3840 is the classic example. Exchange CA-source property into an out-of-state replacement and you owe CA an annual informational return for every year you hold the replacement. Miss a Form 3840 and CA can declare the entire deferred gain immediately taxable.
Practical rule: before you close any cross-state exchange, retain a CPA licensed in both the source and destination states. The state tax conformity post has current rules state by state.
Deep dive 1031 Exchange State Tax ConformityThe hardest part of a 1031 is not the tax law. It is keeping the paper trail clean across six months of activity involving a QI, a CPA, two closing agents, a property manager, a lender, and yourself. When the audit letter arrives in 2029 asking for the 2026 closing disclosure and the depreciation schedule that fed the adjusted basis, you want that folder ready in 30 seconds.
That is the problem DoorVault was built to solve. I built it because I was running eight rentals across three PMs and losing my mind every April. Knox (the AI) reads every document you upload (closing disclosures, settlement statements, appraisals, PM statements, HUD-1s, loan documents) and extracts the numbers into the right fields on the right property. When it is time to brief your CPA on the relinquished basis, the closing costs, and the depreciation schedule, you export one clean packet.
For 1031 investors, DoorVault keeps the relinquished and replacement linked in one portfolio, tracks every dollar that feeds the adjusted basis calculation, stores the exchange agreement and QI correspondence in the property's document vault, and exports a CPA-ready package at year end. The 1031 investor landing page walks through the specific features.
The free plan covers two properties with every feature unlocked. Enough to load the relinquished and the replacement and see how the paper trail comes together. Start free at doorvault.app.
Two properties, every Knox AI feature unlocked, no credit card. Load your relinquished and replacement before your next exchange and see the paper trail come together in one place.
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