The Forty Five Day Identification Period

The forty five day identification period is the first of two deadlines that govern every delayed like kind exchange under Section 1031. The clock starts on the day the relinquished property closes escrow, not the day a listing goes live and not the day an offer is accepted. For a Phoenix, AZ investor selling a Maricopa County property, that closing date is the trigger, and the forty five calendar days that follow, including weekends and holidays, are the only window in which replacement property can be formally identified to the qualified intermediary.

This guide explains what identification actually requires, why the deadline is unforgiving, and how Phoenix investors typically plan around it. It is written as an educational reference for investors who are new to exchange timing rules or who want a refresher before starting a sale.

What counts as a valid identification

Identification is a written document, signed by the taxpayer, that describes candidate replacement properties with enough detail that a title company could locate them, typically a street address or legal description. It must be delivered to the qualified intermediary, the seller of the replacement property, or another party involved in the exchange who is not a disqualified person, such as the investor or the investor's immediate family or existing service providers. A verbal mention to a broker, a saved listing, or an internal note does not satisfy the requirement. The Internal Revenue Service recognizes three identification approaches. The three property rule allows identification of up to three properties regardless of value. The two hundred percent rule allows identification of more than three properties as long as the combined fair market value does not exceed twice the value of the relinquished property. The ninety five percent rule allows identification of any number of properties without a value cap, provided at least ninety five percent of the identified value is actually acquired by the end of the exchange.

Why Phoenix investors plan before the sale closes

Because the forty five day window begins at closing and cannot be extended for any reason, including delays caused by financing, weather, or an intermediary's availability, most experienced Phoenix, AZ investors begin evaluating replacement candidates while the relinquished property is still under contract. Greater Phoenix submarkets such as Scottsdale, Tempe, Mesa, Chandler, and Gilbert each move at different paces, and a shortlist that looks adequate on paper can shrink quickly if a target property receives a competing offer during the identification window. Investors who wait until after closing to start looking often find themselves choosing from a narrower set of options than they intended, or defaulting to the two hundred percent rule with properties they have not fully evaluated. A written identification submitted with time to spare also gives the qualified intermediary and any lenders more room to review financing contingencies before the one hundred eighty day exchange period runs out.

Common mistakes during the forty five day period include identifying a property by an informal address or nickname rather than a legal description a title company can locate, sending identification directly to a real estate agent instead of the qualified intermediary or another eligible party, and revising an identification list verbally after the written notice was already delivered. An identification, once properly delivered, generally can be revoked or replaced with a new written identification, but only if the replacement is also delivered before midnight on day forty five. After that point, the list is locked regardless of whether a better option surfaces. Because Phoenix, AZ closings sometimes involve properties recorded with Maricopa County on a Friday afternoon, investors and their teams often confirm the exact recorded closing date with the title company in writing, rather than assuming the date on the purchase contract, since a discrepancy of even one business day changes when the forty five day window ends.

Investors identifying replacement property outside Arizona should also account for how quickly out of state brokers and sellers respond to identification related requests, since a slow response from a distant seller can eat into the limited days remaining before the deadline. Building a shortlist with a small amount of redundancy, rather than identifying only the single property the investor most wants, is a common practice among Phoenix investors managing the three property rule, since it preserves flexibility if a primary target falls out of contention during the window. Regardless of the identification strategy chosen, the qualified intermediary generally provides a written confirmation once an identification notice is received, and Phoenix investors typically keep that confirmation, along with the identification letter itself, in the exchange file for future reference.

Missing the forty five day deadline, even by a single day, generally disqualifies the exchange. When that happens, the funds held by the qualified intermediary become taxable, and the investor recognizes gain on the original sale in the year the exchange failed. There is no extension process built into the statute for ordinary circumstances, although federally declared disasters can sometimes trigger IRS relief for affected taxpayers. Because the consequences of missing the window are significant, calendar tracking, written confirmation from the intermediary, and a documented identification letter are standard practice for Phoenix investors managing this deadline.