Real Estate Decoded - Free Tool

1031 Exchange Calculator

1031 exchange: the deferred-gain math, the 45/180 day windows, and the boot exposure that triggers partial recognition.

Companion to: Real Estate Decoded Chapter 11 (1031 Exchange) - Workbook tab (Tax Strategy Decoded workbook)

Inputs

Outputs

Net sale proceeds
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Realized gain
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Deferred gain (full 1031)
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Mortgage boot (if any)
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Total boot recognized
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Tax on recognized boot
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Tax deferred via exchange
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New property carryover basis
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How to read this tool: Section 1031 defers (NOT eliminates) capital-gains tax when real estate is exchanged for like-kind real estate. The 45-day identification window and 180-day close window are statutory. Boot (cash or mortgage relief) is recognized as taxable gain to the extent of realized gain. New-property basis = replacement cost MINUS deferred gain - so the gain comes back at the next sale unless deferred again.

What this tool is for

1031 exchange is the single most-used tax-deferral tool in US real estate. The discipline: replacement property identified within 45 days, closed within 180 days, equal-or-greater-value, equal-or-greater-debt, no boot. Practitioners like Sam Zell built fortunes on serial 1031 chains compounding tax-deferred. This tool gives you the boot exposure and tax-deferral math.

Benchmarks the practitioner watches

Common mistakes

Educational reference only. Not investment, tax, legal, or real-estate advice. Confirm market-specific cap rates, lender terms, and tax overlay with your own advisors before acting.
Educational references and tools — not legal, tax, accounting, or investment advice, and not a recommendation to buy or sell any security. Consult a qualified professional about your specific situation. © 2026 The Baratelli Institute.