How long do I have to identify replacement property in a 1031 exchange?

Forty-five calendar days from the date you transfer the relinquished property. The identification must be in writing, signed, unambiguous enough to identify the property, and delivered to your qualified intermediary or another party to the exchange before midnight on day 45. Calendar days means weekends and federal holidays count; the deadline does not roll to the next business day. There is no extension available for the 45-day period except in the case of a federally declared disaster where the IRS issues specific relief.

Is the 180-day 1031 deadline always 180 days?

No, and this is the trap that catches fourth-quarter sellers. The exchange period ends on the earlier of 180 calendar days after the transfer, or the due date including extensions of the taxpayer's federal income tax return for the year in which the relinquished property was transferred. If you close in November or December, your return due date in the following spring arrives before day 180 and the exchange period contracts. Filing IRS Form 4868 for an individual return, or the equivalent extension for an entity return, before the original due date restores the full 180 days.

What are the three identification rules for a 1031 exchange?

The three-property rule lets you identify up to three replacement properties with no limit on their combined value. The 200% rule lets you identify any number of properties so long as their aggregate fair market value does not exceed 200% of the value of the property you sold. The 95% rule lets you identify any number of properties of any value, but you must actually acquire at least 95% of the aggregate value of everything you identified. Most exchanges use the three-property rule; the 200% rule is common when stacking several smaller assets.

Can I change my identification after day 45?

No. You can revoke and re-identify freely at any point during the 45-day period, in writing and delivered the same way the original identification was, but once day 45 passes the list is fixed. You may only acquire property from that list. This is why the identification list should be built deliberately rather than filed at the last minute — a list of three properties where two are unrealistic is effectively a list of one.

What happens if I miss a 1031 deadline?

The exchange fails and the sale is treated as a taxable sale in the year the relinquished property was transferred, triggering federal capital gains tax, unrecaptured Section 1250 depreciation recapture at rates up to 25%, and potentially the 3.8% net investment income tax. There is no partial credit for being close and no administrative appeal. The deadlines are statutory. The only recognized relief is IRS disaster-related postponement for taxpayers affected by a federally declared disaster.

1031 Exchange · September 25, 2026 · Steven Owen

1031 exchange deadlines: the 45-day and 180-day rules, and the trap that shortens them

A 1031 exchange runs on two clocks that start the day your sale closes: 45 calendar days to identify replacement property in writing, and 180 calendar days to close on it. Both are calendar days — weekends and holidays count, and nothing rolls to the next business day. The part almost nobody is told: the exchange period actually ends on the earlier of day 180 or the due date of your tax return for the year of the sale. Sell in November and your 180 days can quietly become 140 unless you file an extension. Everything else in an exchange is negotiable. These dates are not.

When the clock starts

Both periods begin on the date the relinquished property is transferred — in practice, the closing date of your sale, not the date you signed a contract, not the date the title company received funds, and not the day you decided to exchange. Day one is the day after closing. If you close on September 30, day 45 is November 14 and day 180 is March 29.

If you are selling multiple properties as part of one exchange, the clocks run from the first transfer. That single sentence has ended more exchanges than any other rule in this article. An owner selling three small assets over a four-month period does not get three sets of deadlines; they get one, dated from the first closing.

Day 45: identification

By midnight on day 45 you must deliver a written identification to your qualified intermediary or another party to the exchange. It has to be signed, and it has to describe the property unambiguously — a street address or legal description, not “a retail building in Round Rock.” You may revoke and replace the list as many times as you like inside the 45 days, using the same delivery method. After day 45 the list is frozen, and you can only acquire what is on it.

You choose one of three identification rules:

Rule	How many you can identify	Value limit	What you must acquire
Three-property rule	Up to 3	None — any value	Any one or more of them
200% rule	Unlimited	Aggregate FMV ≤ 200% of the property sold	Any of them
95% rule	Unlimited	None	At least 95% of the aggregate identified value

Most exchanges use the three-property rule because it is simple and imposes no value ceiling. The 200% rule earns its keep when you are replacing one larger asset with several smaller ones. The 95% rule is a trap dressed as flexibility — miss the 95% threshold by a single property and the whole identification fails.

A practical note from running these searches: identify three real options, not one option and two decoys. Backup identifications only work if you would actually close on them. Sellers who list a primary target plus two properties they have never toured discover in week seven that they have no fallback at all.

Day 180: the deadline that is not always 180 days

The replacement property must be received by the earlier of:

(a)	180 calendar days after the transfer of the relinquished property, or
(b)	the due date — including extensions — of the taxpayer’s federal income tax return for the tax year in which the relinquished property was transferred.

For a sale closing in the first half of the year this is academic; day 180 lands well before the following April. For a fourth-quarter sale it is decisive. Close on November 20 and day 180 is May 19 of the next year — but an individual return is due April 15, which is day 146. Without action you lose five weeks of exchange period, and those are usually the five weeks you need.

The fix is mechanical and cheap: file IRS Form 4868 (or the applicable entity extension) before the original due date of that year’s return. The extension pushes the return due date out and restores the full 180 days. File the extension even if you expect the exchange to close early — there is no downside, and an exchange that slips two weeks is common. Note that an extension of time to file is not an extension of time to pay; any tax owed for that year is still due on the original date.

What does not extend the deadlines

Weekends and federal holidays do not extend either period. A financing delay does not extend them. A seller who will not close does not extend them. A title defect, a failed inspection, a lender repricing at the last minute, a 1031 intermediary’s processing time — none of these matter to the statute. The only recognized relief is an IRS postponement for taxpayers affected by a federally declared disaster, which the Service issues by notice and which has specific eligibility criteria. You cannot plan around it.

How to build the timeline backwards

The way to survive these dates is to run the calendar in reverse before you list, not after you close. On a typical Texas commercial transaction we work back from day 180 like this:

Milestone	Target	Why
Replacement search begins	Before the relinquished property goes under contract	The market takes weeks to surface the right asset; the clock does not care that you started late
Qualified intermediary engaged	Before the sale closes — no exceptions	If you take constructive receipt of proceeds, the exchange is dead before it starts
Two or three targets under LOI or contract	Day 25–40	Leaves room to fail on one without burning the identification
Written identification delivered	Day 40–44, not day 45	Delivery problems on the last day are unrecoverable
Financing committed	Day 90–120	Debt replacement drives boot — see boot and debt replacement
Extension filed if the sale closed in Q4	Before the return’s original due date	Preserves the back half of the exchange period

If the search has not produced real candidates by day 25, that is the moment to widen geography or asset type — or to consider a structure that takes the timing pressure off entirely. A reverse exchange buys the replacement first and sells second, and fractional options such as a DST can close quickly when nothing else will. We cover the search problem itself in finding replacement property in 45 days.

Reporting

The exchange is reported on IRS Form 8824 with the return for the year the relinquished property was transferred — including an exchange that straddles two calendar years and closes the following spring. The form captures the dates, the properties, the realized and recognized gain, and the basis carried into the replacement property. Your qualified intermediary supplies the transaction detail; your CPA prepares the form.

How SCORE helps

Steven Owen is an Austin commercial real estate Agent who builds the exchange calendar before the listing goes live, not after the sale closes. SCORE runs the replacement search in parallel with the disposition, maintains a Central Texas database of on- and off-market assets to shorten the 45-day window, and coordinates with your qualified intermediary and CPA so the dates are somebody’s explicit job. See 1031 exchange services and how a 1031 works, start to finish.

Selling into an exchange this year?

Send us the closing date. We’ll map your day 45 and day 180, flag whether the return due date shortens your window, and start the replacement search now rather than after closing.

Talk to Steven 1031 services

This article is general information for commercial real estate owners and investors, not tax or legal advice. Section 1031 is federal tax law and its application depends on facts specific to you and your property. Before starting an exchange, engage a qualified intermediary and confirm treatment with your CPA or tax counsel — SCORE Property Group and Steven Owen are real estate professionals, not tax advisors, and do not act as a qualified intermediary. Authorities referenced: Internal Revenue Code §1031 as amended by the Tax Cuts and Jobs Act (real property only, effective 2018) and left unchanged by the One Big Beautiful Bill Act signed July 4, 2025; Treas. Reg. §1.1031(k)-1; Rev. Proc. 2000-37; Rev. Rul. 2004-86; IRS Form 8824. Verified as of September 25, 2026. Related: How a 1031 exchange works in Texas · Boot and debt replacement · Finding replacement property in 45 days · Reverse and improvement exchanges.