Methodology · AU-HOME-019
How the Home Deposit Calculator works
This page documents how the Home Deposit Calculator produces its figures: the engines and formulas it runs, the rule packs it reads statutory values from, the official documents those packs cite, and how the engines are verified.
Engines and formulas
- E01 · Core money and period engine
Integer-cent money arithmetic and explicit period conversions (52 weeks, 26 fortnights, 12 months per year).
Verification
Engines carry boundary tests at every bracket edge, property-based tests, reconciliation invariants and, where official worked examples exist, tests that reproduce them exactly. The full source register is on the sources page.