Back to calculator Use calculator
Real Estate InvestorGenerated accuracy model review: 2026-05-06
Rent vs Sell 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
- Rent path advantage = rental cash flow over the holding period + future net sale proceeds - net sale proceeds today grown by the reinvestment return assumption.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Current Property Value: $425,000
- Current Mortgage Balance: $275,000
- Monthly Rent: $2,700
- Occupancy Rate: 95%
- Monthly Operating Expenses: $900
- Management Fee Rate: 8%
- Monthly Mortgage Payment: $1,650
- Holding Period: 5 years
- Annual Appreciation: 3%
- Sale Cost Rate: 7%
- Future Mortgage Balance: $245,000
- Reinvestment Return: 5%
Expected outputs
- Rent Path Advantage: $48,318.22
- Rental Path Value: $201,791.08
- Sell-Now Reinvested Value: $153,472.86
- Annual Rental Cash Flow: -$2,282.40
- Future Net Sale Proceeds: $213,203.08
Known limitations
- These calculators do not fetch live market rents, property values, platform fees, tax rates, mortgage quotes, rent-control rules, short-term rental regulations, or sale comps. Enter the current assumptions that apply to your property and review important decisions with qualified local professionals.
Assumptions
- All rents, nightly rates, occupancy, operating expenses, management fees, sale costs, appreciation, and reinvestment returns are user-entered assumptions.
- No platform rates, property management rates, rent caps, tax rates, brokerage fees, or market forecasts are hardcoded.
- Results are deterministic planning estimates and are not investment, legal, tax, accounting, lending, or property-management advice.
- Calculations run locally in the browser without uploading private property, tenant, reservation, financing, or sale data.
Unit handling
- Current Property Value accepts values in $.
- Current Mortgage Balance accepts values in $.
- Monthly Rent accepts values in $.
- Occupancy Rate accepts values in %.
- Monthly Operating Expenses accepts values in $.
- Management Fee Rate accepts values in %.
- Monthly Mortgage Payment accepts values in $.
- Holding Period accepts values in years.
- Annual Appreciation accepts values in %.
- Sale Cost Rate accepts values in %.
- Future Mortgage Balance accepts values in $.
- Reinvestment Return accepts values in %.
- Rent Path Advantage is displayed as currency.
- Rental Path Value is displayed as currency.
- Sell-Now Reinvested Value is displayed as currency.
- Annual Rental Cash Flow is displayed as currency.
- Future Net Sale Proceeds is displayed as currency.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
- Currency outputs are displayed with standard US dollar formatting.
- Input precision follows configured step values where provided.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current rent-vs-sell-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Rent vs Sell Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.