Multifamily Tools
1031 Exchange Calculator
See realized gain, cash boot, mortgage boot, and the minimum replacement price and new debt to fully defer. Deadlines are 45 days to identify and 180 days to close.
Relinquished vs replacement
Identify by day 45. Close the replacement by day 180. Both run from this closing date.
- Buy equal or greater value
- Reinvest all net equity
- Replace equal or greater debt
Set a closing date to see 45 / 180.
1031 rules this calculator is testing
What is boot in a 1031 exchange?
Boot is value you take out of the exchange — leftover cash or a drop in mortgage balance. Boot is taxable up to realized gain. Buying cheaper or walking with cash creates boot.
Do I have to replace the debt?
Yes, or put in extra cash. If the old loan was $720k and the new loan is $600k, the $120k of debt relief is mortgage boot unless you add $120k of equity.
What are the 45-day and 180-day deadlines?
From the relinquished closing you have 45 days to identify replacement property in writing with the QI, and 180 days to close (or the tax-return due date, if earlier). The clock does not pause.
Educational estimate only. Use a qualified intermediary and a CPA. This does not model depreciation recapture rates, state tax, or related-party rules. Screen the replacement building on the Investment Calculator.