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: February 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 & referral (lead) disclosure

We may earn revenue through advertising (including Google AdSense), affiliate partnerships, and paid referrals (lead fees) when you choose to submit an enquiry to be contacted by a mortgage broker partner.

This does not change the formulas, inputs, assumptions, or results used in our calculators. Calculator results are generated independently of any advertising, affiliate relationship, or referral arrangement.

Any advertisements, affiliate links, or referral prompts are shown separately from calculations and are labelled clearly. Submitting an enquiry is optional and requires your consent. When you submit an enquiry, we may share your details with a broker partner so they can contact you.

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