What Is 1031 Exchange?
A 1031 exchange defers taxes when you sell a rental or investment property and buy another. You've got 45 days to identify replacement properties and 180 days to close. The replacement must be equal or greater value; you must reinvest all net proceeds. A Qualified Intermediary holds your sale proceeds — you can't touch the money or the exchange fails. On a $1.2 million sale with $400,000 in gains, a proper 1031 can preserve roughly $150,000 in equity that would otherwise go to taxes. Investors who 1031 consistently build 38% more wealth over 20 years than those who pay taxes and reinvest what's left.
A 1031 exchange (IRC Section 1031) lets you sell an investment property and defer capital gains and depreciation recapture by reinvesting the proceeds into a like-kind replacement property of equal or greater value, using a Qualified Intermediary to hold the funds.
At a Glance
- 45-day rule: Identify replacement properties in writing by day 45 from sale
- 180-day rule: Close on replacement by day 180 (runs concurrently with 45-day period)
- QI required: Qualified Intermediary must hold proceeds — you cannot have constructive receipt
- Same or greater value: Replacement must be equal or greater; reinvest all net proceeds for full deferral
- Boot = taxable: Cash or debt relief received (replacement costs less) is taxable
- Depreciation recapture: Section 1250 gain taxed at 25% — 1031 defers it when done correctly
How It Works
You sell your relinquished property. The proceeds don't go to you — they go to a Qualified Intermediary (QI), a third party that holds the funds in escrow. You never touch the money. That's the rule. Touch it, and the exchange fails. You owe taxes.
The timeline. Both clocks start at closing. Day 45: identify replacement properties in writing — specific addresses, signed and dated, delivered to the QI. Day 180: close on one or more identified properties. Miss either deadline and the deferral is gone. No appeals. One exception: if your tax return due date falls before day 180 (e.g., you sold in November), your deadline is the earlier of 180 days or your filing date. File an extension to get the full 180 days.
Identification options. Three-Property Rule: identify up to 3 properties regardless of value. 200% Rule: identify any number with total value up to 200% of your sale price. 95% Rule: identify any number if you end up acquiring 95% of their combined value.
Same or greater value. To defer 100% of gains, your replacement property must cost at least as much as your net sale proceeds, and you must reinvest every dollar. Buy for less? The difference is "boot" — taxable. Take cash out? Boot. Replacement has less mortgage debt than your old property? Debt relief is boot.
Boot rules. Boot is the taxable portion. You're taxed on the lesser of: (a) boot received, or (b) your total realized gain. Sell for $500,000, buy for $450,000 — $50,000 boot. Taxable. But if your gain was only $30,000, you're taxed on $30,000. The rest of the boot isn't double-taxed.
Real-World Example
Marcus: Trading up from a duplex to a 12-unit.
He sells his Memphis duplex for $420,000. After paying off the $280,000 mortgage and $12,000 in selling costs, net proceeds: $128,000. His basis is $180,000 (purchase minus depreciation taken). Realized gain: $240,000. Depreciation recapture: $85,000. Without a 1031, he'd owe roughly $75,000 in federal and state taxes.
He engages a QI ($1,200 fee). Day 42: he identifies a 12-unit in Cleveland for $485,000. Day 165: he closes. He invests the full $128,000 plus $357,000 in new cash. Total replacement: $485,000 — greater than net proceeds. No boot. Gain deferred.
His new property has higher NOI and more units. He's scaled up without a tax hit. When he eventually sells the 12-unit, he can 1031 again — or pay taxes then. The deferral compounds. $75,000 stayed invested instead of going to the IRS.
Pros & Cons
- Defers federal and state capital gains — keep 100% of equity working in the next property
- Defers depreciation recapture (25% rate) — no immediate hit on previously claimed deductions
- Lets you trade up — sell a smaller property, buy a larger one, scale the portfolio
- No limit on number of exchanges — you can 1031 repeatedly, deferring until you eventually cash out or die (stepped-up basis for heirs)
- Reverse exchange option — buy the replacement first if you find the right deal before selling
- Strict deadlines — 45 and 180 days are unforgiving; no extensions except disaster declarations
- QI required — adds $750–$2,000+ in fees; you don't control the funds during the exchange
- Replacement must be equal or greater — can't downsize and keep full deferral
- All-cash replacement is rare — you usually need additional capital to trade up
- Complexity — boot calculation, identification rules, and timing require careful planning
Watch Out
The biggest mistake: touching the money. The moment you receive sale proceeds directly, the exchange is dead. The QI must be engaged before you close on the relinquished property. Your sale contract must assign your rights to the QI. If your buyer writes you a check and you deposit it, you're done — no 1031.
Second: the tax return deadline trap. Sell in late October or November? Your 180-day period may end at your April 15 filing date — giving you fewer than 180 days. File a full tax return extension to push the deadline and get the full 180 days. Don't assume you have until day 180.
Third: identification mistakes. Vague descriptions ("a property in the Cleveland area") don't work. You need a specific address. And if you identify 4 properties under the 200% rule but only close on 2 that total 80% of the identified value, you may have boot — the 95% rule requires acquiring 95% of what you identified.
Ask an Investor
The Takeaway
A 1031 exchange is the primary tool for scaling a rental portfolio without the tax hit. Sell, identify within 45 days, close within 180, reinvest everything in a like-kind replacement. Use a Qualified Intermediary — you can't touch the money. The replacement must be equal or greater value. Get it right and you defer capital gains and depreciation recapture. Get it wrong and you owe. See the portfolio scaling guide and tax optimization guide for how 1031 fits into a scaling strategy.