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Home & UtilitiesGenerated accuracy model review: 2026-05-06
Home Emergency Fund 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
- Target fund = (monthly mortgage/rent + taxes/insurance/HOA + utilities) x cushion months + repair reserve + insurance deductible.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Mortgage or Rent: 2,200 $/mo
- Taxes, Insurance, HOA: 700 $/mo
- Utilities: 350 $/mo
- Cushion Months: 4 months
- Repair Reserve: $4,000
- Insurance Deductible: $2,500
Expected outputs
- Home Emergency Fund Target: $19,500.00
- Monthly Housing Essentials: $3,250.00
- Monthly Cushion Amount: $13,000.00
Known limitations
- This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
- Use the result as a planning estimate unless the calculator page states a stricter purpose.
Assumptions
- All prices, rates, taxes, and usage values are entered by the user.
- Calculations run locally in your browser and are not stored by Calwarden.
- This is planning math, not financial, tax, engineering, or legal advice.
Unit handling
- Mortgage or Rent accepts values in $/mo.
- Taxes, Insurance, HOA accepts values in $/mo.
- Utilities accepts values in $/mo.
- Cushion Months accepts values in months.
- Repair Reserve accepts values in $.
- Insurance Deductible accepts values in $.
- Home Emergency Fund Target is displayed as currency.
- Monthly Housing Essentials is displayed as currency.
- Monthly Cushion Amount 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 home-emergency-fund-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Home Emergency Fund Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.