Common Identification Mistakes in a 1031 Exchange

Once you close on the sale of your relinquished property, the clock starts immediately. You have exactly 45 calendar days to identify your potential replacement properties in writing. This deadline is strict and cannot be extended for weekends, holidays, or most unforeseen circumstances, with only very limited exceptions for federally declared disasters.

Missing the 45-day deadline will disqualify the entire exchange.

The identification must be:

• In writing
• Signed by the exchanger
• Delivered to the Qualified Intermediary or another party involved in the exchange
• Received before midnight on the 45th day

A verbal identification is not sufficient.

The IRS limits the number of properties that can be identified, so taxpayers must comply with one of the following rules:

The Three-Property Rule

You may identify up to three replacement properties, regardless of their value.

You only need to acquire one of the three identified properties to complete the exchange successfully. This is the most commonly used rule because it offers both simplicity and flexibility. Most investors use this option by identifying three properties and closing on the one that best aligns with their investment strategy.

The 200% Rule

You may identify more than three properties, provided the total fair market value of all identified properties does not exceed 200% of the fair market value of the relinquished property.

For example, if you sell your relinquished property for $500,000, you may identify any number of replacement properties as long as their combined value does not exceed $1,000,000.

You must still acquire at least one of the identified properties.

The 95% Exception

You may identify any number of properties with no value limitation, provided you acquire properties representing at least 95% of the total fair market value of everything you identified.

This rule is rarely used because it requires closing on nearly every identified property, which creates significant practical risk.

Proper Property Description Matters

The replacement property must be described with enough detail to be clearly and unambiguously identified.

For real estate, a street address or legal description is generally sufficient.

Can You Change Your Identification?

Yes—but only before the 45-day deadline.

You may revoke, replace, or modify your identification at any time during the identification period. Once Day 45 passes, your identification becomes final and cannot be changed.

Common Identification Mistakes to Avoid:

Missing the Deadline

The 45-day identification period begins on the closing date of the relinquished property—not when you receive the exchange proceeds.

This is one of the most common and costly mistakes.

Your Qualified Intermediary should confirm your exact identification deadline in writing.

Identifying Too Few Properties

Many investors identify only one replacement property, leaving no backup plan if that transaction falls apart.

If your only identified property becomes unavailable after Day 45, your exchange fails—and the full capital gains tax becomes due.

Always build in options.

Using Vague Property Descriptions

An identification that says “a commercial property in Kansas City” is not sufficient.

The IRS requires identification of a specific, clearly identifiable property. Vague descriptions can invalidate the exchange.

Violating the Three-Property Rule

If you identify four or more properties, you must verify compliance with the 200% Rule.

Failing to do so can disqualify the entire exchange, even if everything else was handled correctly.

In a 1031 Exchange, timing and documentation are everything. Proper identification is one of the most critical steps in preserving your tax deferral—and one of the easiest places for investors to make costly mistakes.

Working closely with an experienced Qualified Intermediary helps ensure your exchange stays compliant from Day 1 through closing.