Methodology · AU-HOME-018
Property Buying Costs Calculator
Add general transfer duty to your conveyancing, inspection and other upfront costs for a complete picture of the cash needed to buy.
Engines and formulas
- E08 · Property transaction engine
General transfer duty as bracket base plus rate per $100 or part thereof, from per-state rule packs. Unsupported states block rather than guess.
Registered formulas: §12.8 duty brackets
Rule packs
Statutory values come only from versioned, hash-verified rule packs citing official sources. Current status of the packs this calculator can use:
- au-stamp-duty-nswactive · v0.1.0
- au-stamp-duty-vicactive · v0.1.0
- au-stamp-duty-qldactive · v0.1.0
- au-stamp-duty-waactive · v0.1.0
- au-stamp-duty-saactive · v0.1.0
- au-stamp-duty-tasactive · v0.1.0
- au-stamp-duty-actactive · v0.1.0
- au-stamp-duty-ntactive · v0.1.0
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.