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Finance Formula Verification

36 of the 36 published finance calculators have an automated formula test suite. Each row gives one calculator's passing cases and the kinds of check behind them.

Last updated 16 September 2026

This is the finance section of the formula verification report, which explains what each kind of case tests, how the counts are produced and what they do not prove. Rows run from the largest suite to the smallest; each row's address ends in the calculator's slug, so one calculator's evidence can be linked and cited on its own. The test file behind every row, and the per-kind numbers, are in the machine-readable report.

Every finance calculator, with its case mix

Automated formula-test coverage for the Finance calculators: passing cases and case mix per calculator
CalculatorCasesCase mix
Cost of Living Calculator5,89280 independent · 20 golden · 16 boundary · 5,750 property · 26 structural
Loan Affordability Calculator5,89280 independent · 20 golden · 16 boundary · 5,750 property · 26 structural
Overtime Pay Calculator5,89280 independent · 20 golden · 16 boundary · 5,750 property · 26 structural
NPS Calculator5,49537 independent · 18 golden · 15 boundary · 5,400 property · 25 structural
Step-Up SIP Calculator5,49537 independent · 18 golden · 15 boundary · 5,400 property · 25 structural
401(k) Calculator3,6224 independent · 20 golden · 27 boundary · 2,836 property · 735 structural
Retirement Calculator1,3193 boundary · 650 property · 666 structural
Savings Calculator2192 golden · 6 boundary · 112 property · 99 structural
Interest Ledger Calculator20920 independent · 50 golden · 55 boundary · 58 property · 26 structural
Car Depreciation Calculator7917 independent · 20 golden · 14 boundary · 12 property · 16 structural
FIRE Calculator7917 independent · 20 golden · 14 boundary · 12 property · 16 structural
Closing Cost Calculator753 independent · 25 golden · 19 boundary · 8 property · 20 structural
Extra Mortgage Payment Calculator753 independent · 25 golden · 19 boundary · 8 property · 20 structural
HELOC Payment Calculator753 independent · 25 golden · 19 boundary · 8 property · 20 structural
Home Equity Loan Calculator753 independent · 25 golden · 19 boundary · 8 property · 20 structural
Student Loan Calculator753 independent · 25 golden · 19 boundary · 8 property · 20 structural
Mortgage Calculator664 independent · 25 golden · 26 boundary · 8 property · 3 structural
Debt-to-Income Ratio Calculator652 independent · 17 golden · 19 boundary · 11 property · 16 structural
APY Calculator649 independent · 16 golden · 12 boundary · 15 property · 12 structural
Auto Loan Calculator615 independent · 18 golden · 18 boundary · 14 property · 6 structural
Loan Calculator5425 golden · 10 boundary · 16 property · 3 structural
Mortgage Refinance Calculator524 independent · 21 golden · 14 boundary · 11 property · 2 structural
Amortization Schedule Calculator512 independent · 21 golden · 12 boundary · 11 property · 5 structural
Compound Interest Calculator488 independent · 20 golden · 9 boundary · 9 property · 2 structural
Home Affordability Calculator487 independent · 14 golden · 15 boundary · 8 property · 4 structural
Loan to Value Calculator482 independent · 13 golden · 6 boundary · 3 property · 24 structural
Debt Consolidation Calculator4126 golden · 10 boundary · 3 property · 2 structural
APR Calculator384 golden · 7 boundary · 20 property · 7 structural
Rent vs Buy Calculator3624 golden · 7 boundary · 3 property · 2 structural
Gratuity Calculator303 independent · 11 golden · 9 boundary · 5 property · 2 structural
Car Lease vs Buy Calculator2914 golden · 11 boundary · 2 property · 2 structural
Freelancer vs Employee Calculator1812 golden · 6 boundary
Barista FIRE Calculator144 golden · 7 boundary · 3 property
Coast FIRE Calculator144 golden · 8 boundary · 2 property
Personal Loan Calculator143 golden · 2 boundary · 7 property · 2 structural
UAE Gratuity Calculator147 independent · 4 boundary · 3 property
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Photo: Leeloo The First / Pexels
Questions about this policy?Published by Calculator Matters (calculatormatters.com). Last reviewed 16 September 2026. Created and maintained by Jay Sudha (about Calculator Matters). These pages are reviewed regularly, and questions are always welcome.
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