Data Sources & Methodology

MoneyWiseCalc Australia provides calculators and guides designed to help you estimate common financial outcomes. We focus on accuracy, transparency, and regular review — especially for finance topics where reliability matters.

Last updated: January 2026

1 Data sourcing policy (Australia)

We build each calculator using publicly available information from official Australian government bodies, regulators, and reputable institutions. Where a figure is an "assumption" (e.g., a default interest rate), we label it clearly and allow you to change it.

Common source types include:

Australian Taxation Office (ATO)
Tax tables, Medicare levy rules, payroll-related guidance (where applicable)
Reserve Bank of Australia (RBA)
Cash rate / economic reference data used for context or defaults
State Revenue Offices
Stamp duty schedules, concessions, surcharges, thresholds
Fair Work Ombudsman
Minimum wage / employment standards where relevant to payroll tools
Other official publications
State budget papers, legislative instruments, official calculator references

Each calculator page includes a Sources section with direct references and effective dates.

2 Calculation methodology (AU)

We use standard financial formulas and apply Australian statutory rules only where they are explicitly included in the calculator's inputs and logic.

Mortgage & home loan calculators
  • Method: Standard amortisation (reducing balance) repayment calculations
  • Assumptions: Compounding and repayment frequency are stated on the page (and configurable where relevant)
Salary / employer cost / payroll calculators
  • Method: Applies relevant tax scales and statutory components that are selected or enabled (e.g., Medicare levy, superannuation where applicable)
  • Important: Results are estimates; individual circumstances (offsets, rebates, HELP/HECS, salary packaging, private health cover) can change outcomes
Stamp duty calculators
  • Method: Applies published state/territory schedules and concessions/surcharges only when the matching options are selected (e.g., first home buyer, owner-occupier vs investor)
  • Note: Eligibility rules can be complex; calculators provide estimates for planning

3 Verification & testing

To maintain accuracy, we:

  • Test calculators using known scenarios and edge cases
  • Compare outputs with published examples or official reference calculators where available
  • Maintain automated checks so rate table changes don't break results

4 Update cadence (Australia)

  • Tax year changes: Reviewed when published tables change for the new financial year
  • State duty/rate changes: Reviewed when state schedules or thresholds change

Each calculator page shows:

  • "Effective date" (where relevant)
  • "Last verified"
  • A short changelog (when practical)

5 Assumptions & limitations

MoneyWiseCalc Australia provides estimates only. Real-world results may differ due to:

  • Lender policy differences, rounding, and fees
  • Eligibility rules (first home buyer schemes, surcharges, exemptions)
  • Personal tax details not captured in the inputs

6 Advertising & affiliate disclosure

We may earn revenue through advertising (including Google AdSense) and/or affiliate partnerships. This does not change the formulas used in calculators.

Any partner offers are shown separately from calculations and are labelled clearly.

7 Important Disclaimer (Australia)

MoneyWiseCalc Australia provides general information and tools only. We do not provide financial, tax, or legal advice. Consider seeking independent professional advice before making decisions.

8 Report a discrepancy / contact

If you believe a calculator result is incorrect or a source needs updating, contact:

Email: contact@moneywisecalc.com.au