The 45-Day and 180-Day Clocks in a Land Exchange

Day 45: written identification

The replacement property must be identified no later than 45 calendar days after the taxpayer transfers the relinquished property. The identification should be signed, delivered to a permitted recipient, and describe the property unambiguously.

Receiving replacement property within the first 45 days generally satisfies the identification requirement for that property. Otherwise, a casual email to a broker or an unsigned personal list may not meet the regulatory rules.

Day 180 may arrive earlier than expected

The replacement property generally must be received by the earlier of 180 calendar days after transfer or the due date, including extensions, of the federal income-tax return for the year in which the transfer occurred.

The 45-day and 180-day periods run at the same time. Completing identification on day 45 does not create another 180 days. Weekends and holidays ordinarily do not extend either period.

A practical land-buyer timeline

Farm and recreational purchases can involve surveys, access questions, environmental review, water or mineral issues, agricultural leases, timber evaluation, financing, and title curative work. Those tasks often consume much of the exchange period.

• Before sale: assemble the team and begin searching for replacement property.
• Days 1–20: tour candidates and begin financial and physical due diligence.
• Days 21–40: negotiate, inspect, and prepare a compliant identification strategy.
• By day 45: deliver the final signed identification.
• Days 46–180: complete diligence, financing, title work, and acquisition.