The 1031 Exchange, Explained: Defer Taxes When You Sell an Investment Property
How a 1031 like-kind exchange lets investors defer capital gains taxes — the 45/180-day clocks, qualified intermediary rules, equal-or-greater math, and the mistakes that blow exchanges up.
Sell an investment property at a gain and the tax bill can eat 20-30% of your profit between federal capital gains, depreciation recapture, and state tax. Section 1031 of the tax code offers a legal deferral: roll the full proceeds into another investment property, follow the rules exactly, and pay nothing now. The rules are unforgiving about deadlines and paperwork — but they're mechanical, not mysterious.
The rules that matter
- Investment or business property only — not your home, and (since 2018) real estate only.
- 'Like-kind' is broad: any U.S. real estate held for investment swaps for any other — a rental house for a retail condo, land for an apartment building.
- 45 days from closing to identify replacement properties, in writing, to your intermediary (typically up to three candidates).
- 180 days from closing to finish buying. Both clocks run concurrently, and neither extends because your deal hit a snag.
- A qualified intermediary (QI) must hold the sale proceeds. Touch the money yourself — even one wire to your account — and the exchange is dead.
- Equal or greater: to defer everything, the replacement must cost at least as much as what you sold, with all equity reinvested and equal-or-greater debt. Any shortfall ('boot') is taxable.
The timeline in practice
Engage the QI before your sale closes — this is the step people miss, and it can't be fixed retroactively. Close the sale; proceeds go straight to the QI. Start hunting immediately: 45 days evaporates, and serious exchangers are shopping before they close. Identify up to three candidates in writing by day 45, go under contract, and close by day 180 with the QI funding the purchase. Then hold: the safe-harbor practice is to genuinely operate the replacement as an investment (most advisors want to see two years).
What blows exchanges up
- No QI in place at the sale closing — instantly fatal, no cure.
- Missing day 45 because the replacement hunt started too late.
- Downsizing (cheaper replacement or less debt) and getting surprised by taxable boot.
- Identifying only one candidate that then falls through — name your full three.
- Trying to exchange a flip or your residence; 1031 is for held investments.
Frequently asked
How much does a 1031 exchange cost?
Qualified intermediary fees typically run about $750-$1,500 for a standard delayed exchange, plus your normal closing costs on both transactions. Against a five- or six-figure deferred tax bill, it's usually the best-priced service in the entire transaction.
Can I 1031 into multiple properties, or with a partner?
Multiple replacements are fine — the three-property identification rule (or the 200%-of-value alternative) governs how many you can name. Partnership situations are trickier: the same taxpayer that sold must buy, so restructuring ownership before a planned exchange takes advance tax advice.
What happens to the deferred tax eventually?
It carries into the new property's basis and comes due when you finally sell without exchanging. Investors either keep exchanging ('swap till you drop' — heirs may receive a stepped-up basis that eliminates the deferred gain) or time the final sale for a low-income year. This is squarely CPA territory; Theo can explain mechanics, but file with a professional.
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