Editorial standards

These standards apply to every calculator, guide and dataset on CalculatorHub. They are enforced in our build, not just stated here.

Accuracy

Every published figure is either sourced to an official government authority and recorded with its date, or it is a market-variable input you enter yourself with a clearly labelled default. We never assert a real-world figure we cannot confirm against an official source.

Government sources only

Figures come from official government, state and local authorities such as the IRS, the Social Security Administration, state departments of revenue, the Bureau of Labor Statistics and the Federal Reserve. We do not take figures, formulae or wording from other calculator or commercial websites.

No guessed data

If a figure cannot be confirmed, we either keep it as an editable field with a note to check the current figure with the authority, or we hold the page rather than publish a guess. "We do not know yet" is an acceptable, honest answer; a confident wrong number is not.

Original work

Every tool is built from first principles. We derive each formula from the official rule, implement it ourselves, write the explanation in our own words, and use our own worked examples. Nothing is copied from competitors.

Verification

Each tool ships with a worked example that runs as an automated test, so the visible maths and the code can never silently diverge. Formulae are checked across edge cases, and figures are re-verified whenever a source changes.

Provenance and review

Each figure-bearing page shows its official sources, the date each figure is current as at, and the date a human last reviewed it. Tools are reviewed by James Graham, editor; jurisdiction-specific review expands as the site grows.

Localisation

Non-English and country-specific content is genuinely localised, with the correct local rules, currency, spelling and terminology, never machine-translated.

Corrections

If you spot an error, email hello@calculatorhub.com. We check the report against the official source and correct it promptly, and significant figure changes are recorded in our public change history.

CalculatorHub provides general information, not financial, tax, legal or investment advice.