1031 Exchange Timeline: Every Deadline You Need to Know

The 1031 Exchange Timeline at a Glance

The 1031 exchange timeline consists of three key milestones that every investor should understand before initiating an exchange.

Both deadlines are measured in calendar days, not business days. The deadlines do not extend if they fall on a Saturday, Sunday, or federal holiday.

Day 0: The Sale Closes and the Clock Starts

The 1031 exchange timeline begins on the day the relinquished property sale closes. The specific date is determined by the closing date on the settlement statement, which is when title transfers. The contract date or the date of agreement is not relevant for purposes of starting the clock.

At closing, all sale proceeds must go directly to the Qualified Intermediary. The exchanger cannot take actual or constructive receipt of the funds at any point during the exchange. If the exchanger touches the proceeds, even briefly, the exchange is disqualified under Treasury Regulation § 1.1031(k)-1(g)(4).

The QI must be engaged before closing. Attempting to set up a QI arrangement after the sale has already closed is too late, and the transaction will not qualify as a valid 1031 exchange.

One practical consideration: engage the QI well before listing the property for sale. This ensures the exchange agreement and escrow instructions are in place before a buyer materializes. For the full list of IRS requirements that apply to a valid exchange, see our guide to the 7 key IRS requirements for a 1031 exchange.

Days 1 Through 45: The Identification Period

Within 45 calendar days of closing on the relinquished property, the exchanger must formally identify one or more potential replacement properties. This requirement is codified in 26 CFR § 1.1031(k)-1(c)(2).

The identification must be made in writing, signed by the exchanger, and delivered to the Qualified Intermediary or another party involved in the exchange who is not a disqualified person. The written notice must include an unambiguous description of each identified property, typically a street address, legal description, or assessor's parcel number.

The Three Identification Rules

The IRS provides three alternative rules for how many replacement properties an exchanger may identify, found in 26 CFR § 1.1031(k)-1(c)(4).

• The Three-Property Rule allows the exchanger to identify up to three replacement properties regardless of their fair market value. This is the most commonly used rule.
• The 200% Rule allows identification of more than three properties, provided their combined fair market value does not exceed 200% of the fair market value of the relinquished property at the time of sale.
• The 95% Exception permits identification of any number of properties at any value, but only if the exchanger actually acquires properties representing at least 95% of the total value of all identified properties. This rule is rarely used due to the high risk of failure.

Key Identification Period Details

The identification list can be changed or revoked at any time before midnight on Day 45. Once midnight passes, the list is final. No additions, substitutions, or revocations are permitted after that point.

The 45-day deadline does not extend if it falls on a weekend or federal holiday. An exchanger whose Day 45 falls on a Saturday must still deliver the identification notice by midnight Saturday.

As a practical matter, submit the signed identification notice before close of business on the last business day before Day 45. This accounts for potential delivery issues and confirms timely receipt by the QI. For strategies on managing this window effectively, see our 45-day identification tips and strategies.

Days 46 Through 180: The Exchange Period

The exchanger has 180 calendar days from the date of the relinquished property sale to close on the replacement property. Because the 180-day period begins on the same day as the 45-day identification period, only 135 days remain after the identification deadline passes.

During this phase, the exchanger must close on one or more of the previously identified replacement properties. No changes to the identification list are permitted after Day 45. All exchange funds held by the QI should be directed toward the replacement property purchase. Any exchange proceeds that are not reinvested constitute “boot” and are subject to taxation.

The Tax Return Due Date Rule

The exchange period does not always last the full 180 days. Under IRC Section 1031(a)(3)(B), the exchange period ends on the earlier of two dates: 180 calendar days after the relinquished property sale, or the due date (including extensions) for the exchanger's federal income tax return for the year the relinquished property was sold.

This distinction becomes important for sales that occur late in the calendar year. Consider this illustrative example: an investor sells a relinquished property on November 1, 2025. The 180-day deadline falls on April 30, 2026. However, the investor's 2025 federal tax return is due April 15, 2026. Because April 15 comes before April 30, the exchange deadline is April 15 unless the investor files a tax extension.

Filing Form 4868 extends the tax return due date to October 15, 2026, which restores the full 180-day window. For any property sold after mid-October, filing a tax extension is a straightforward precaution that protects the full exchange period.

The 180-day deadline, like the 45-day deadline, does not extend for weekends or federal holidays.

What Happens If You Miss a 1031 Exchange Deadline

Missing the 45-Day Identification Deadline

If the exchanger fails to deliver a valid identification notice by midnight on Day 45, the exchange is immediately and automatically invalidated. There is no partial credit, grace period, or opportunity to cure the deficiency.

The QI returns the exchange funds to the taxpayer, and the sale of the relinquished property is treated as a fully taxable event. The following taxes may apply to the recognized gain:

• Federal long-term capital gains tax at rates of 0%, 15%, or 20% depending on the taxpayer's income bracket.
• Depreciation recapture tax at a rate of up to 25% under IRC § 1250 on previously claimed depreciation deductions.
• The Net Investment Income Tax (NIIT) of 3.8% for taxpayers with modified adjusted gross income exceeding $200,000 (single) or $250,000 (married filing jointly).
• State income taxes may also apply depending on the jurisdiction.

Missing the 180-Day Exchange Deadline

Missing the 180-day deadline produces the same result. The exchange is invalidated, exchange funds are returned by the QI, and the full capital gains tax liability would generally become due. Taxpayers who did not plan for this contingency may face additional penalties and interest on the unpaid tax.

Can Deadlines Be Extended?

In nearly all cases, no. The IRS does not grant individual extensions for 1031 exchange deadlines. There is no provision to request additional time due to financing delays, title issues, seller disputes, or personal hardship.

The only exception involves federally declared disasters, discussed in the following section. The IRS did grant temporary extensions during COVID-19 under IRS Notice 2020-23, but those provisions are no longer in effect.

Deadline Extensions: Disaster Relief

Under Revenue Procedure 2018-58, the IRS may postpone the 45-day and 180-day deadlines for taxpayers affected by federally declared disasters. Section 17 of Revenue Procedure 2018-58 extends deadlines to the later of 120 days from the original deadline or the published disaster relief deadline.

To qualify, the taxpayer must be in the covered disaster area, or the exchange property, essential records, or a key transaction party (such as the QI, lender, or escrow agent) must be located in the affected zone.

The extension is automatic. No application or formal request is required, but the taxpayer should document eligibility and notify the QI in writing of the revised deadlines.

Recent examples include Hurricane Helene in 2024, where the IRS extended deadlines to May 1, 2025 for taxpayers in seven affected states, and Washington State severe storms in December 2025, with deadlines extended to May 1, 2026.

Outside of federally declared disasters, no mechanism exists to extend 1031 exchange deadlines for any reason.

Special Timeline Situations

Reverse 1031 Exchange Timeline

In a standard 1031 exchange, the investor sells the relinquished property first and then acquires the replacement. A reverse exchange reverses this sequence: the investor acquires the replacement property before selling the relinquished property.

Because the IRS does not allow the taxpayer to hold title to both properties simultaneously, an Exchange Accommodation Titleholder (EAT) temporarily holds the replacement property under a Qualified Exchange Accommodation Agreement (QEAA). The safe harbor for this structure is established in Revenue Procedure 2000-37.

The reverse exchange timeline mirrors the standard exchange. The clock starts when the EAT acquires the replacement property. Within 45 calendar days, the taxpayer must identify the relinquished property to be sold. Within 180 calendar days, the relinquished property must be sold and the exchange completed. The EAT holding period is limited to 180 days under the safe harbor.

Reverse exchanges are more complex and more expensive than standard exchanges due to the EAT structure and associated legal, financing, and holding costs. However, they protect investors who find a replacement property before their current property sells.

Improvement (Build-to-Suit) Exchange Timeline

An improvement exchange allows the investor to use exchange funds to construct or renovate the replacement property. The EAT typically holds title during construction, and the QI or EAT disburses exchange funds to cover improvement costs.

The same 45-day identification and 180-day exchange deadlines apply. All exchange-funded improvements must be completed within the 180-day window. This tight timeline makes improvement exchanges impractical for large-scale construction projects, though they can work for renovations or smaller builds that can be finished within six months.

Multiple Relinquished Properties

When an investor sells more than one relinquished property, each sale starts its own independent set of 45-day and 180-day deadlines. Overlapping timelines require careful tracking and coordination with the QI to avoid missing any individual deadline.

Planning Checklist: How to Stay on Track

Before Listing the Relinquished Property

• Engage a Qualified Intermediary.
• Begin researching potential replacement properties.
• Consult a tax professional about exchange structure and tax implications.
• Notify your real estate agent that the sale will be part of a 1031 exchange.

At Closing (Day 0)

• Confirm the QI receives all sale proceeds directly from escrow.
• Mark Day 45 and Day 180 on the calendar and verify whether either falls on a weekend or holiday.
• If closing after mid-October, file a tax extension (Form 4868) to protect the full 180-day window.

During the Identification Period (Days 1 Through 45)

• Conduct property due diligence and market analysis on potential replacement properties.
• Finalize the identification list and submit the signed notice to the QI before the Day 45 deadline.
• Confirm the QI has received and acknowledged the identification notice.

During the Exchange Period (Days 46 Through 180)

• Negotiate the purchase agreement for the identified replacement property.
• Coordinate with the QI for fund disbursement at closing.
• Close on the replacement property before Day 180 (or the tax return due date, if earlier).
• Retain all exchange documents for IRS records.

Frequently Asked Questions