Free real estate calculator

1031 Exchange Calculator

Model cash and debt boot, deferred gain, replacement basis and exchange deadlines.

By Calculate My Property EditorialUpdated September 30, 2026Professional review pending
01 / Your inputs

Start with your property.

Property8 inputs
USD
USD
USD
USD
Only qualifying exchange costs; consult your QI.
USD
USD
USD
USD
Timing2 inputs
All amounts in USD.
Your estimate

Gain deferred

$280,000Based on your inputs · USD
Gain recognized
$0
Replacement basis
$370,000
45-day identification deadline
2026-11-29
Exchange completion deadline
2027-04-13
See the breakdown
Realized gain
$280,000
Cash boot
$0
Net debt boot
$0
The formula

Recognized gain = lesser of realized gain and taxable boot

Assumptions & limitations (1)
  • Simplified fully funded investment/business real-property exchange; a qualified intermediary must structure the exchange before closing. Cash received cannot be offset by new borrowing. The completion limit is earlier of 180 days and the tax-return due date including extensions.
External resource

Review your tax scenario.

Bring the report and basis records to a credentialed tax professional.

Find a tax professionalExternal provider or resource. No paid referral arrangement is active.
Planning estimate. Editorially sourced; independent professional review is pending. How we calculate
Worked example

Follow the default numbers.

With relinquished sale price of $600,000, original basis of $350,000, the model gives gain deferred: $280,000.

The formula is recognized gain = lesser of realized gain and taxable boot. Open the breakdown to trace expenses and assumptions. Change one input at a time to see how your decision changes. This example uses scenario inputs; it is not an offer, tax bill, appraisal or legal determination.

A qualifying exchange is a process

Section 1031 generally applies to real property held for business or investment, not a personal residence or property held primarily for sale. The replacement must be properly identified and received on time. The tool assumes a qualifying exchange structure and shows arithmetic; it does not establish intent, validate identification or arrange a qualified intermediary.

Cash boot and debt relief are distinct

The simplified equity model compares available exchange equity plus additional cash with the equity required for the replacement. Retained cash can be boot. Debt relief not replaced by new debt or contributed cash can also be boot. Additional borrowing does not automatically wash away cash received. Recognized gain is limited to realized gain; the remaining gain is deferred.

The deadline clock does not pause

Identification normally ends forty-five calendar days after transfer. Completion ends at the earlier of one hundred eighty days or the federal return due date including extensions. The dates are calendar-day reminders and do not extend for weekends automatically. Disaster relief, reverse exchanges, multiple relinquished properties and other exceptions require separate treatment.

Replacement basis carries the deferred gain

The simplified replacement basis is replacement value less deferred gain. Actual Form 8824 reporting can include different exchange expenses, other property, liabilities, cash allocations and depreciation carryover schedules. A future sale can recognize deferred amounts. Share the modeled boot, dates and cash requirements with your qualified intermediary and CPA before the transaction closes.

Keep your assumptions with the result

Save the calculation to your deal file to reuse compatible inputs in another tool. The file stays in this browser on this device. Download the CSV to open the complete inputs, results and schedule in Excel or Google Sheets. Use PDF to print the report or save it as a PDF. A share link includes entered financial figures in its URL, so use it only with people you intend to share those numbers with.