KiwiTools guide
Data sources and assumptions
We distinguish official rules and guidance, externally supplied records, illustrative presets and the values you provide.
Tax-year rules (2027)
Income-tax brackets, the 1.75% ACC earners' levy and its $156,641 cap, KiwiSaver settings, student-loan settings and applicable tax-credit settings are centralised from Inland Revenue material for 1 April 2026 to 31 March 2027. They must be reviewed before a new tax year is published.
Energy, transport and employment guidance
Electricity Authority, EECA and MBIE material supports power-bill, appliance and solar context. NZTA supports RUC and vehicle guidance. Employment New Zealand supports public-holiday, annual-leave and pay concepts. Rules that affect a result are kept separate from editable prices and usage assumptions.
Outdoor locations and changing conditions
Outdoor place pages use authorised location records and validated local snapshots for tracks, huts, campsites, dog-friendly walks and freshwater fishing access. Live alerts and forecasts are requested separately where available. These records do not grant land access or replace current signs, permission, regulations, booking services or land-manager notices.
Mortgage, property and comparison inputs
Rates, property values, deposits, terms, council assessments, buying costs, rent, vacancy, fuel prices, flight costs, mobile-plan prices and ownership assumptions are entered or editable planning values. Defaults are examples, not offers, national averages or predictions. Relevant context is drawn from Reserve Bank, Settled, Sorted, Commerce Commission and Consumer Protection guidance.
Addresses, school zones and maintained dates
School-zone results depend on address matching and Ministry of Education mapped enrolment-zone data. Boundaries and enrolment schemes can change, and near-boundary results require confirmation. Public-holiday and regional-anniversary dates are maintained as application data and should be checked against official guidance for important leave planning.
Appliance and scenario presets
Wattages, duty cycles, kWh-per-cycle values, growth assumptions and example costs are editable starting points. They are not measurements of every model or predictions of future prices. Labels, manuals, bills, quotes, measured use and provider terms should take priority.
Review and corrections
Each tool page identifies relevant sources, assumptions or data limitations. Material rule, dataset or formula changes should be updated with the related logic and supporting content. Corrections can be reported through the contact form linked in the footer.