A 1031 exchange has two hard IRS deadlines. Miss either one and the exchange collapses into a taxable sale. The IRS does not grant extensions. Your qualified intermediary cannot negotiate on your behalf. Your CPA cannot file an amendment. The deadlines are federal, absolute, and date-certain.
The two deadlines are 45 days and 180 days. Both clocks start on the same day — the closing date of your relinquished property sale. Most sellers I've worked with who had 1031 exchanges go sideways ran out of time on the first deadline. Understanding the sequence below is the difference between a clean exchange and a six-figure tax bill.
The day your LA multifamily sale closes is Day 0. The qualified intermediary (QI) takes possession of the sale proceeds and holds them in a segregated escrow account. You cannot touch the money yourself — doing so voids the exchange, even unintentionally.
Both the 45-day identification clock and the 180-day exchange clock start running on Day 0.
What you need in place by this date:
- Qualified intermediary engaged and holding sale proceeds
- CPA and attorney aware of the exchange structure
- Initial list of potential replacement properties (ideally — more on this below)
Forty-five calendar days. Not business days. Not court days. Calendar days, inclusive of weekends and holidays. If Day 0 is January 15, Day 45 is March 1.
By midnight of Day 45, you must identify replacement properties in writing to your qualified intermediary. The identification must be specific — street address, legal description, or unambiguous identifier.
Three identification rules, choose one:
Three-property rule: Identify up to three properties of any value. Most common choice. Simple to satisfy.
200% rule: Identify any number of properties, but their combined fair market value cannot exceed 200% of the relinquished property's sale price. Use when you're casting a wider net and each candidate is much smaller than your sale.
95% rule: Identify any number of properties with no value cap, but you must eventually acquire at least 95% of the total identified value. Rarely used — high risk of failure.
What goes wrong in the 45 days:
Most sellers don't start looking for replacements until after Day 0. They then spend the first 15 days getting organized, the next 15 days touring, and the final 15 days negotiating. The result is hurried decisions on replacement properties they wouldn't have chosen with more time.
The fix: start identifying replacements before the relinquished property closes. By Day 0, you should already have your shortlist mapped. The 45 days then becomes a period for due diligence and term sheets, not for starting the search.
One hundred eighty calendar days from Day 0. If Day 0 is January 15, Day 180 is July 14.
By midnight of Day 180, you must have closed on one or more of the identified replacement properties. Not under contract. Not in escrow. Closed — deed recorded, title transferred, QI having released funds to the seller of the replacement property.
Exception: if your federal tax return for the year of the sale is due earlier than Day 180 (including extensions), the tax return deadline controls. For a sale that closes in December, this can shorten the window significantly.
The equal-or-up requirement:
To defer all capital gains and depreciation recapture tax, the replacement property's total value and total debt must equal or exceed the relinquished property's. Trading down creates taxable "boot" equal to the shortfall.
Example: you sell a $5M LA building carrying $2M of debt. To defer all tax, the replacement must be worth at least $5M with at least $2M of debt (or cash substituted for the debt shortfall). Acquire a $4M replacement — $1M of boot, taxed immediately. Acquire a $5M replacement with $1M debt — $1M debt shortfall as boot, taxed.
Failure one: "I can't find a replacement in time." Nearly always caused by starting the search after Day 0. The 45-day clock is unforgiving of preparation gaps.
Failure two: "The replacement deal fell through at Day 60." Sellers identify one property without backup. If diligence kills the first deal, they have no remaining candidates to pivot to. The fix: identify two or three properties, not one.
Failure three: "We couldn't close by Day 180." Most common causes: financing delays, title issues on the replacement, seller-side delays from the replacement seller. The fix: target closing by Day 150, not Day 180. The 30-day buffer absorbs predictable delays.
Failure four: "The QI went out of business during the exchange." Rare but catastrophic. Due diligence on the QI's financial stability is essential — balance sheet, segregated trust accounts, insurance.
Best-practice sequence for a clean 1031:
Sellers who follow this sequence execute clean 1031s. Sellers who compress it pay for the compression in either tax (failed exchange) or poor replacement choices (rushed diligence).
Missing Day 45: the exchange is over. The QI returns proceeds to you, and the sale becomes fully taxable. Federal capital gains, California state tax, and depreciation recapture all apply. For a meaningful gain, that's typically 35-40% of the gain.
Missing Day 180: same outcome. The exchange fails. Tax applies.
There is no cure for a missed deadline. No waiver process. No extension. The 1031 is one of the few tax strategies where procedural compliance is binary.
Most 1031 exchanges that fail, fail on the calendar. Not on the tax strategy, not on the replacement property quality, not on the IRS rules. On the clock.
Sellers who treat the 1031 as a calendar problem — not a tax problem — execute clean exchanges. Sellers who treat it as a tax strategy and assume the calendar will work itself out are the sellers who pay the full tax bill six months after a sale that was supposed to defer it.
Request a free evaluation — including a 1031 timeline planned before your sale closes →
When does the 1031 exchange clock start?
On Day 0 — the closing date of your relinquished property sale. Both the 45-day identification clock and 180-day exchange clock start the same day.
Can I get an extension on 1031 deadlines?
No. The 45-day and 180-day deadlines are federal and absolute. The only exception is federally-declared disaster relief (rare and narrow).
What counts as "identification" of a replacement property?
Written notice to your qualified intermediary before midnight of Day 45, with specific property identification — street address, legal description, or unambiguous identifier.
What if I identify multiple properties and acquire only one?
That's fine under the three-property rule or 200% rule. Acquire at least one identified property by Day 180 and close according to equal-or-up requirements.
Can I change my identified properties after Day 45?
You can revoke and re-identify any time before Day 45. After Day 45, you're locked in to what was identified. You must acquire a subset of those specific properties to complete the exchange.
Related reading:
- The Complete 1031 Exchange Guide for LA Multifamily Investors
- Try the 1031 Exchange Calculator
- 1031 Exchange Mistakes That Cost LA Investors Millions
Michael Sterman is Senior Managing Director Investments at Marcus & Millichap. $1.41 billion across 254 closed transactions — many of them 1031 exchanges that closed clean because the calendar was managed from Day -60, not Day 1.
Thinking about selling? Get a no-obligation evaluation from a broker with $1.41 billion across 254 closed LA multifamily transactions.
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