The 45 Day Identification Period Explained

The forty five day identification period is the window, beginning on the date the relinquished property closes, during which a San Antonio exchanger must formally name the replacement property or properties under consideration. It is one of the two deadlines that define a 1031 exchange, alongside the one hundred eighty day closing deadline, and missing it generally disqualifies the entire exchange, regardless of how far along the replacement purchase otherwise is.

The forty five day period begins on the date the relinquished property closes, not on the date the exchange agreement is signed or the date the investor starts looking for replacement property, and it runs concurrently with the one hundred eighty day closing deadline rather than sequentially before it. That means an investor is simultaneously working against both deadlines from the first day after closing, and the forty five day window does not pause or reset if the investor is still shopping for a suitable San Antonio replacement candidate.

A valid identification must be in writing, signed by the exchanger, and delivered before midnight on the forty fifth day to the Qualified Intermediary or another party permitted to receive it under the safe harbor rules, such as the seller of the replacement property or the exchanger's attorney, provided that party is not treated as the exchanger's agent. The identification must describe the property with enough specificity, generally a legal description or street address, to be unambiguous; a vague description covering a general area or a range of possible properties does not satisfy the requirement.

Under the standard rule, an exchanger may identify up to three replacement properties without regard to their combined value. Alternative rules exist for identifying more than three, including a two hundred percent rule allowing any number of properties as long as their combined fair market value does not exceed two hundred percent of the relinquished property's value, and a ninety five percent rule allowing any number of properties regardless of combined value, provided the exchanger actually acquires at least ninety five percent of the value of everything identified.

The most common error is treating the forty five day period as a soft target rather than a hard deadline, continuing to negotiate on a preferred property while failing to submit a formal written identification on any backup candidate. Because San Antonio submarkets can move quickly in a given price band, an investor who loses their primary candidate late in the window with no identified alternative on file has effectively forfeited the exchange. A second common mistake is submitting an identification that is too vague, such as identifying property by area or price range rather than a specific address or legal description.

The forty five days are calendar days, not business days, and the deadline is not extended if the forty fifth day falls on a weekend or federal holiday. A San Antonio investor should calculate the exact deadline date immediately after the relinquished property closes and build in a buffer of at least several days before that date to allow time for the written identification to be prepared and delivered, rather than assuming it can be finalized on the deadline itself.

An exchanger may revoke or amend a previously submitted identification at any time before the forty five day deadline expires, which allows a San Antonio investor to swap out a candidate that fails diligence for a better alternative, as long as the replacement identification is also delivered in writing before the same deadline. Once the forty five days have passed, however, the identification list is locked, and no further additions, substitutions, or amendments are permitted regardless of what happens later in the diligence or financing process on any listed property.

Because a locked identification list cannot be changed after the deadline, a San Antonio investor benefits from front-loading as much diligence as possible into the forty five day window itself, including a preliminary title review, a walkthrough or inspection, and a rough financing conversation with a lender, before committing a property to the list. Waiting until after the forty fifth day to discover a problem with the sole identified property leaves the exchanger with no ability to substitute a replacement, which is why identifying more than one candidate, where realistic, is generally treated as standard practice rather than an unusual precaution.