Short answer: Generally, no. The 45-day and 180-day deadlines are set by statute and can't be extended for weekends, holidays or delays. The exceptions: IRS relief for federally declared disasters and combat zone service, and filing a tax return extension (Form 4868) when your return due date would otherwise end the exchange before day 180.
Reviewed by Jon Hilley. Last updated September 29, 2026.
Generally, no. The 45-day identification period and the 180-day exchange period in the 1031 exchange timeline are written into the statute, and neither your qualified intermediary nor the IRS can grant an extension for a slow lender, a delayed inspection or a deal that falls through. The days are calendar days, and a deadline that lands on a weekend or holiday does not roll forward.
There are two real exceptions. The IRS can postpone the deadlines for taxpayers affected by a federally declared disaster or serving in a combat zone. And if your 180 days would be cut short by your tax return due date, filing a return extension restores the full 180 days. A reverse 1031 exchange timeline runs on the same 45 and 180 days, with the same limited relief.
Key rules
- Fixed statutory deadlines: identify replacement property within 45 days and receive it by the earlier of 180 days or your return due date, including extensions (IRC §1031(a)(3)).
- No weekend or holiday extension: the periods are counted in calendar days, and the 45 days run inside the 180 (IRC §1031(a)(3)).
- Disaster relief: the IRS can postpone 1031 deadlines, including reverse exchange deadlines, for affected taxpayers in federally declared disasters (IRC §7508A; Rev. Proc. 2018-58, section 17).
- Military relief: service in a combat zone can postpone tax deadlines (IRC §7508).
- Reverse exchanges use the same clock: identify the relinquished property within 45 days and complete within 180 days after the accommodation titleholder takes title (Rev. Proc. 2000-37).
The return due date trap: filing a tax extension to keep your 180 days
The 180-day period ends on the earlier of day 180 or the due date of your tax return for the year of the sale. For an individual calendar-year filer who sells after mid-October, April 15 arrives before day 180.
You fix this by filing an extension, Form 4868 for individuals, by April 15. The due date then moves to October 15, which is later than day 180, so you get the full 180 days. This is the only "1031 exchange extension" that is fully in your control. Businesses and trusts use their own extension forms and due dates.
How IRS disaster extensions for 1031 deadlines work
When the IRS issues disaster relief, the notice for that disaster lists the affected areas and the postponement period. Under Rev. Proc. 2018-58, a 45-day or 180-day deadline that falls within the relief period is typically postponed by 120 days or to the end of the disaster postponement period, whichever is later, subject to the limits in the specific notice.
Relief generally reaches you if you live in the covered area, or if the relinquished or replacement property, or a key party to the transaction (such as your QI, lender or title company), is located there. The details depend on the notice, so check the IRS announcement for your disaster and confirm with your QI.
Relief is not automatic. It applies only after the IRS issues a notice or news release for a federally declared disaster; a state or local emergency declaration doesn't trigger it on its own. Rev. Proc. 2018-58 also covers taxpayers who have trouble meeting a deadline because of the disaster, for example when a lender won't fund, title insurance isn't available, or exchange documents were destroyed.
Example: a November sale and the April deadline
- Relinquished property sale closes: Monday, November 16, 2026
- Day 45 (identification deadline): Thursday, December 31, 2026
- Tax return due date: Thursday, April 15, 2027 (day 150)
- Day 180: Saturday, May 15, 2027
- Realized gain at stake: $400,000 (including $100,000 of depreciation)
- Federal tax if the exchange fails: $85,200
Without an extension, this investor's exchange period ends April 15, 2027, a full 30 days early. Filing Form 4868 by April 15 restores the deadline to May 15, 2027, and because that is a Saturday, the closing has to happen by then, not the following Monday. If the exchange fails, the tax at stake is $85,200: 25% on the $100,000 of depreciation ($25,000), 15% on the other $300,000 ($45,000) and 3.8% net investment income tax on $400,000 ($15,200). State tax is not included.
Track your own dates with our 1031 exchange deadline tracker.
What to do when you're running out of time
- Identify backups: use the three-property rule to name alternates, not just your first choice.
- Consider a DST as a backup: a DST interest can often close in days, which makes it a common backup identification.
- Close on part of it: a partial exchange is allowed; you pay tax only on the boot.
- Reverse the order next time: if you find the replacement first, a reverse exchange lets you buy before you sell, but the 45 and 180 days still apply to the parked property.
Other questions investors ask
How long do you have on a reverse 1031 exchange?
You have 180 days from the day the exchange accommodation titleholder takes title, and 45 days within that to identify the property you will sell. The only extension is disaster relief. Parking a property longer than 180 days falls outside the Rev. Proc. 2000-37 safe harbor, a riskier position that needs tax counsel. See what an exchange accommodation titleholder does.
Is it possible to do a 1031 exchange after closing?
No. The qualified intermediary has to be in place before your sale closes, so the proceeds go to the QI instead of to you. Once you receive the money, or could have received it, the exchange is no longer available. See how to set up a 1031 exchange.
How many times can you do a 1031 exchange in a year?
There is no limit. You can do as many exchanges as you like, as long as each property is held for investment or business use and each exchange meets its own 45-day and 180-day deadlines. Frequent quick resales, though, can make you look like a dealer holding property for sale.
Does a 1031 exchange ever expire?
The deferral doesn't expire. The deferred gain carries into the replacement property's basis and stays deferred until a taxable sale, and heirs generally receive a stepped-up basis at death (IRC §1014). Only the deadlines inside each exchange are fixed. See what happens when you sell a 1031 exchange property later.
Common mistakes
- Assuming the QI can grant extra time. We get calls around day 170 asking for a short extension. No QI can give one, and closing a day late means the exchange fails.
- Forgetting the return due date. The most common problem we see with late-year sales is a tax preparer filing on time in April without realizing the exchange isn't finished.
- Counting business days. Weekends and holidays count, and a deadline on a Sunday is still a Sunday deadline.
