How our calculators are built, checked and updated.
Each calculator starts with a concrete question. We define the required inputs, units, expected output and assumptions before implementing the formula.
For regulated Moroccan topics, we prefer public and institutional sources such as the Moroccan Tax Administration, CNSS, Bank Al-Maghrib and Autoroutes du Maroc. Secondary sources may help explain a topic but should not replace an official source when one is available.
We identify the parameters that materially affect the result. When an estimate depends on an assumption, the page or form should make it visible. Results may be rounded for readability.
Calculators are checked with several values, including simple, boundary and representative cases. We also verify that the result remains understandable on mobile devices.
Fiscal, social, tariff and financial rules can change. Pages that depend on such data are reviewed periodically and should be corrected when a new rule becomes applicable.
CalcHub provides estimates and educational tools. A result may differ from an official document, payroll statement, bank contract or professional calculation when specific circumstances apply.
If a result looks incorrect, contact us with the page, input values, result and, when possible, the reference source. Last methodology update: August 2026.