The 180-Day Exchange Deadline

The 180-day period counts every calendar day from the closing of the relinquished property, including weekends and holidays, with no pause built in for either deadline. It is not 180 days after identification, and it is not six months in the way a calendar month is measured; it is a straight count of 180 days from the original closing date. An investor whose relinquished property closes in late Washington summer, for example, may find the 180-day deadline lands in the following winter, which affects how much time is realistically available for financing, inspection, and closing logistics on the replacement side.

The 180-day period is capped by the investor's federal tax return due date for the year the relinquished property was sold, including extensions, whichever comes first. In practice this only shortens the window when the relinquished property closes late in the calendar year.

• An exchange that starts in early spring almost always has the full 180 days available, since the following April tax deadline is well past day 180
• An exchange that starts in November or December can see the 180-day count cut short by the April filing deadline unless the investor files for a federal extension
• Filing a timely extension pushes the effective cutoff to October, restoring the full 180 days for late-year closings

An investor whose relinquished property closes in Washington during the last quarter of the year should confirm with their tax preparer whether an extension needs to be filed before the original April deadline, since missing that step can quietly cut a 180-day window down to well under 120 days.

The replacement property acquisition has to actually close, with title transferring to the investor or the investor's exchange entity, before the 180-day period expires. A signed purchase agreement, an accepted offer, or a scheduled closing date that falls even one day past the deadline does not satisfy the requirement. Because financing, appraisal, and title work on the replacement side can each introduce delay, investors working with a lender on a Spokane or Vancouver replacement purchase typically build a buffer of at least two to three weeks before day 180 into their closing target, rather than scheduling the closing for the deadline itself.

Investors identifying more than one replacement property, whether under the three-property rule or the 200 percent rule, need every candidate closing to fit inside the same 180-day window, since the deadline applies to the exchange as a whole rather than to each property separately. A Seattle investor identifying a primary candidate and two backups still has one shared deadline for whichever property actually closes. If the lead candidate falls through with only a few weeks left in the window, there may not be enough time left to close on a backup, which is one reason experienced investors track financing and diligence timelines across all identified candidates simultaneously rather than sequentially. Building a shared closing calendar across every identified property, updated weekly as each deal progresses, keeps the exchange team aware of which candidate is realistically closest to closing well before the deadline becomes a problem.