Estimate potential tax deferral from a like-kind exchange under IRC Section 1031. Enter your numbers below and click calculate.
What this 1031 exchange calculator helps you estimate
A 1031 exchange calculator gives real estate investors a quick way to model how much capital gains tax and depreciation recapture tax they might defer when swapping one investment property for another. Instead of paying tax immediately after a sale, a properly structured like-kind exchange can move that tax liability forward into the future.
This tool focuses on practical planning numbers: realized gain, estimated boot, recognized gain, and projected tax deferral. It is especially useful when you are comparing multiple replacement properties and want to understand how changes in purchase price, debt, and reinvested cash affect your outcome.
How to use the calculator
1) Enter your sale details
- Sale price and selling expenses determine your net sales proceeds.
- Adjusted basis is used to estimate total gain.
- Accumulated depreciation helps break out the recapture portion.
2) Enter your exchange structure
- Mortgage payoff on the old property and new mortgage amount are used to estimate potential debt relief boot.
- Cash reinvested indicates how much of your sale equity is rolled forward into the replacement asset.
- Replacement purchase price helps assess whether you are trading up or down in value.
3) Enter tax assumptions
Use your expected federal long-term capital gains rate, depreciation recapture rate, state tax rate, and NIIT. The calculator estimates tax in two scenarios: selling without an exchange vs. completing a 1031 exchange.
Understanding the key outputs
- Realized gain: Economic/tax gain created by the sale before exchange treatment.
- Estimated boot: Value not fully sheltered in the exchange (typically cash boot or net debt relief).
- Recognized gain: Portion of gain expected to be taxable now.
- Deferred gain: Gain pushed into the replacement property basis.
- Estimated tax deferred: Difference between taxes owed without exchange and taxes currently recognized with exchange.
Important 1031 rules this calculator cannot replace
45-day identification period
You generally must identify replacement property within 45 days after closing the relinquished property.
180-day exchange period
You generally must acquire replacement property within 180 days of the sale (or tax return due date, if earlier unless extended).
Qualified intermediary requirement
Most deferred exchanges require a qualified intermediary to hold proceeds. Taking constructive receipt of funds can disqualify the exchange.
Like-kind property and investment intent
Both old and replacement properties should be held for investment or productive use in a trade or business. Personal-use property rules are different and more restrictive.
Common planning tips for better 1031 results
- Target equal-or-greater value replacement property when possible.
- Reinvest all net equity to minimize cash boot.
- Replace debt (or offset with additional cash) to reduce mortgage boot.
- Run scenarios early with your broker, lender, CPA, and qualified intermediary.
- Keep strong records for basis, improvements, depreciation schedules, and closing costs.
Final thoughts
A 1031 calculator is a strong first step for exchange strategy. It helps you see the tradeoffs between paying taxes now and compounding more equity inside replacement real estate. Use it to prepare better questions for your professionals, compare deal structures faster, and approach your exchange with clearer expectations.