7 Mistakes That Kill a 1031 Exchange
In 5,000+ exchanges, the failures I've seen almost always trace back to one of seven mistakes. Avoid these and your exchange will close cleanly. These are in order of how often I see them go wrong.
1. Missing the 45-day identification deadline
The single most common killer. From the day your sale closes, you have 45 calendar days — not business days — to deliver a written, signed identification of replacement properties to your QI.
Why it happens: Investors underestimate how fast six weeks moves. They haven't sourced replacements before listing. The identification itself is often drafted the last week and something goes wrong with delivery.
The fix: Start touring and shortlisting replacements before you list your relinquished property. By the time you close on Day 0, you should have two or three realistic candidates already identified in your own head, with at least one under active negotiation. Then the 45-day deadline is confirming a deal, not scrambling to find one.
Full detail: The 45-day rule explained.
2. Constructive receipt — touching the funds
If the sale proceeds touch any account you have control over — even for a minute, even "just to redirect" — the exchange is void.
Why it happens: A title company wires to your attorney's trust account "while the QI's account gets set up." Or the sale closes and the check gets handed to you physically. Or the buyer's funds land in your operating account by mistake and you "just forward them" to the QI.
The fix: The QI's exchange account must be set up before the sale closing is scheduled. Wire instructions must go directly from the title company to the QI's segregated account. You never take possession of the funds in any form.
3. Using a disqualified person as QI
Your CPA, attorney, real estate agent, broker, employee, or family member cannot be your QI. The IRS treats them as your "agent" and disqualifies them specifically.
Why it happens: "My attorney said he'd handle it." "I have a CPA buddy who runs a QI on the side." "My real estate agent set up an LLC for this." None work.
The fix: Use a genuinely independent third-party QI with no prior relationship to you in the past 2 years. Credentials (CES), segregated accounts, and fidelity bonding matter much more than familiarity.
4. Buying down (replacement cheaper than sale)
If your replacement property is cheaper than what you sold, the difference is taxable boot. Buying a $800k replacement after selling for $1M creates $200k of taxable cash boot.
Why it happens: Investors underestimate the total cost of replacement (including debt paydown, closing costs) and accidentally end up with some cash on the table.
The fix: Plan the replacement at a net price equal to or greater than your sale price. "Net" means after accounting for all adjustments. If you must buy down, model the partial-exchange tax before signing so you know what you're paying.
5. Debt down without offsetting cash (mortgage boot)
Replacement mortgage smaller than original mortgage creates mortgage boot, even if you didn't take any cash out.
Why it happens: Investors refinance-down on the replacement to reduce leverage, not realizing the tax implication. Or they sell a high-leverage property and buy a low-leverage one without bringing fresh cash to the deal.
The fix: Either match the old debt level on the new property, or offset the debt reduction with fresh cash from outside the exchange. If you had a $500k mortgage and your new mortgage is $350k, put $150k of fresh cash into the replacement purchase.
6. Converting replacement to primary residence too fast
You can exchange into a property that you later convert to a primary residence — but there's a 2-year minimum rental period first. Move in at 6 months and the IRS can retroactively void the exchange.
Why it happens: Investors plan to "eventually" move into their exchanged property, then have a life change that accelerates the move.
The fix: Maintain genuine investment use for at least 2 years. Document the rental arrangement, have actual tenants (not just family), keep depreciation running, and file Schedule E on your returns. Then convert when the IRS has no case.
7. Related-party exchanges without a 2-year hold
Exchanges involving related parties (family, entities you control, certain affiliates) face a 2-year hold rule on both sides. If either party sells their received property within 2 years, the exchange is retroactively disqualified.
Why it happens: Investors structure creative family exchanges to move property between generations or entities without recognizing the related-party scrutiny.
The fix: Plan related-party exchanges assuming both sides will hold for at least 2 years. If any party plans an early exit, restructure — the two-year rule is much stricter than most attorneys realize.
The meta-mistake: no plan before Day 0
Every one of the above mistakes becomes much less likely if you map the entire exchange — from pre-close prep through tax filing — before your sale closes. The exchange itself takes 4-6 months; the planning should start 3-6 months earlier.
The simplest way to do this: a 30-minute call with your QI before you list your sale. I'll walk through the structure, identify any of these seven traps specific to your deal, and map out the timeline so there are no surprises.
Want me to pressure-test your exchange plan?
30-minute call. We'll walk through your deal and flag any red flags before the clock starts.
Schedule Free Consultation