A 1031 exchange deadline calculator computes the two critical deadlines you must meet to complete a like-kind exchange and defer capital gains tax: the 45-day identification deadline and the 180-day closing deadline.
Enter Sale Closing Date
The date you closed on the sale (relinquished property)
How to Use the 1031 Exchange Deadline Calculator
This 1031 exchange deadline calculator computes the two non-negotiable deadlines that govern every like-kind exchange. Missing either deadline disqualifies the entire exchange and triggers immediate capital gains tax.
The Two Critical Deadlines
Day 1 is the closing date of your property sale. From that date, you have exactly 45 calendar days to identify replacement properties in writing to your qualified intermediary. You have exactly 180 calendar days from the same closing date to close on the replacement property.
Working with a Qualified Intermediary
A qualified intermediary (QI) must hold the sale proceeds — you cannot touch the money. The QI receives the funds at closing, holds them in escrow, and transfers them to purchase the replacement property. Engaging a QI before closing is essential; you cannot set up a 1031 exchange after receiving the proceeds.
Year-End Considerations
If your 180-day deadline falls after your tax return due date (typically April 15 for calendar year filers), you must file a tax return extension. Otherwise, the deadline may be shortened to the tax return due date. This is a common pitfall for properties sold in October-December.
Frequently Asked Questions
What are the 1031 exchange deadline rules?
A 1031 exchange has two critical deadlines starting from the day you close on the relinquished property sale: (1) 45-day identification deadline — you must identify potential replacement properties in writing. (2) 180-day closing deadline — you must close on the replacement property. Both deadlines are firm with very limited exceptions.
What happens if I miss the 45-day identification deadline?
Missing the 45-day deadline disqualifies the entire exchange. You would owe capital gains tax on the full sale profit. There are no extensions except in very rare cases declared by the IRS (such as Federally declared disaster areas). Work with a qualified intermediary well before the deadline.
Can the 180-day deadline be extended?
The 180-day deadline is generally not extendable. The only extension is if your tax return due date comes before the 180 days — in that case you must file an extension. If selling late in the year, the 180-day clock may be shorter than expected due to tax filing deadlines.
What is the 3-property rule?
Under the 3-property rule, you can identify up to 3 replacement properties regardless of value. This is the most common identification strategy. Alternatively, the 200% rule allows identifying more properties as long as total fair market value doesn't exceed 200% of the relinquished property value.
Do weekends and holidays count in the 45-day rule?
Yes, the 45 and 180-day deadlines include weekends and federal holidays. If the deadline falls on a weekend or holiday, it does not automatically extend to the next business day. Always confirm exact deadlines with your qualified intermediary.
Is this calculator free?
Yes, completely free with no signup required. This tool calculates dates only — consult a qualified intermediary or tax advisor for exchange strategy guidance.