180-day exchange period

The window in a 1031 exchange to close on the replacement property. Also starts the day the relinquished property sells. Runs alongside the 45-day identification period, not on top of it.

Taxes & insurance · Updated September 2026

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Part 1 of 4

Why a seller cares

The 180 days run from the day the old property closes, and the replacement has to close inside them. They include the 45-day identification window, so identifying on day 45 leaves 135 days to close.

Part 2 of 4

A simple example

Your rental closes March 1. Replacements are identified by April 15, and the replacement has to close by August 28.

180-day exchange period: a simple example
The dateWhat it is
March 1Day zero; the sale closes
April 15Day 45; identification deadline
August 28Day 180; the replacement closes or the exchange fails

One clock, two deadlines, both counted from the same day.

Part 3 of 4

What people get wrong

That the 180 days start after the 45. They run together, from the sale.

Part 4 of 4 · where to read next

Where it appears in the sale

What a definition is, and what it isn't

Keighbor is a software company, not a law firm, brokerage, or tax adviser. This is general information, not legal, tax, financial, or real estate advice about your sale. Your situation may differ. Before acting on a contract, disclosure, title, tax, or pricing question, ask an appropriately licensed professional in your state.

Written and researched by Keighbor Research · drawn from the reference glossary · how we research and check what we publish

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