Calwarden
Back to calculator
Finance & LoansGenerated accuracy model review: 2026-05-06

VA Mortgage 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

  • 1. **Base Loan** = Price - Down Payment. 2. **Funding Fee** = Base Loan * Fee %. 3. **Total Loan** = Base Loan + Funding Fee. 4. **Monthly Payment** is calculated on the Total Loan amount.

Test cases

Default input regression check

Generated from the checked-in default inputs and calculate function.

Inputs

  • Home Price: $300,000
  • Down Payment: $0
  • Interest Rate: 6%
  • Use Type: first
  • Term: 30 Years

Expected outputs

  • Monthly P&I: Invalid input
  • VA Funding Fee: Invalid input
  • Total Loan Amount: Invalid input

Known limitations

  • Funding fee rates are based on standard 2024 charts. Rates may vary slightly for Reservists/National Guard in some historical contexts, though mostly unified now.

Assumptions

  • Inputs are interpreted exactly as entered in the calculator form.
  • The calculation runs locally in the browser using the current checked-in calculator definition.

Unit handling

  • Home Price accepts values in $.
  • Down Payment accepts values in $.
  • Interest Rate accepts values in %.
  • Use Type accepts one of the configured options.
  • Term accepts values in Years.
  • Monthly P&I is displayed as currency.
  • VA Funding Fee is displayed as currency.
  • Total Loan 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.

Version history

1.0.0 - 2026-05-06

Generated accuracy and testing page from the current va-mortgage-calculator calculator definition.

Change log

2026-05-06

Published default regression test documentation and metadata fallbacks for VA Mortgage.

Calculator transparency

Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.

Use calculator