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Real Estate InvestorGenerated accuracy model review: 2026-05-06
1031 Exchange Timeline Calculator accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- Identification deadline = closing date + 45 calendar days. Exchange deadline = closing date + 180 calendar days.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Sale/Closing Date: 2026-05-01
Expected outputs
- Estimated 180-Day Exchange Deadline: 2026-10-28
- Estimated 45-Day Identification Deadline: 2026-06-15
- Deadline Summary: Milestone | Estimated date; Relinquished-property closing | 2026-05-01; 45-day identification deadline | 2026-06-15; 180-day exchange deadline | 2026-10-28
Known limitations
- This calculator does not determine eligibility, identification validity, related-party treatment, boot, financing structure, tax-return due-date issues, or compliance with IRS rules. It is not tax or legal advice.
Assumptions
- All values, dates, rates, and tax assumptions are entered by the user.
- Calculations run locally in your browser and are not stored by Calwarden.
- Results are planning estimates only and are not tax, legal, accounting, lending, or investment advice.
Unit handling
- Sale/Closing Date accepts calendar dates.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current 1031-exchange-timeline-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for 1031 Exchange Timeline Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.