Sourcing standards
- Legal, tax and regulatory topics require official government sources, with URL and effective date recorded.
- Definitional content must match the mainstream usage of the industry, not one vendor's marketing gloss.
- Statistical claims are only made when we hold a verifiable primary source; otherwise we describe the mechanism, not a number.
- Every researched claim on an article is traceable through its listed sources.
Calculator verification
- Each of our fifteen calculators implements a documented, versioned formula.
- Expected results are verified independently by hand-calculation before being encoded as automated tests.
- The test suite covers standard cases, edge cases (zero rates, division by zero, negative inputs) and unit conversions with exact factors.
- Formula versions are recorded; behavior changes bump the version and are shown on the calculator page.
Estimates vs facts
Calculator outputs are estimates built from your inputs and stated assumptions: we label them as such everywhere. They are not approvals, appraisals or predictions. Educational articles distinguish clearly between definitions (verifiable), mechanisms (verifiable) and scenarios (assumptions you choose).
Review cadence
Every published piece carries a 'fact-checked' date. Content is re-reviewed when the subject matter changes or at least annually. Country hubs additionally record which official sources were consulted and when.
Reporting a problem
Found an error? Use the contact page with the URL and what you believe is wrong, plus a source if you have one. Serious factual errors are corrected within 5 business days; corrections are noted on the affected page. We would rather be corrected than confident.