Methodology, sources and limits
Trust does not come from the largest number on screen. It comes from being able to understand where the number comes from.
1. Calculation logic is separate from the interface
Each calculator has typed inputs, validation and a calculation function separate from its visual component. This keeps behaviour testable and lets us add tools without duplicating whole pages.
2. Fiscal data is versioned
Annual assumptions live in a central data layer with an effective year, source and review date. Rules can change, so we flag simplifications instead of hiding them behind a single percentage.
3. An estimate is not an official payroll document
A public calculator does not automatically know every detail of an employment relationship. We therefore show what is included and what is not. An employer payslip and qualified advice remain the references for definitive decisions.
4. Italian terms need context
RAL, TFR, IRPEF, INPS and CCNL do not always have a perfect English equivalent. Our glossary keeps the Italian term visible and explains how it works in practice.
5. Privacy and sensitive documents
The active calculators run in the browser and do not require an account. Future payslip analysis is disabled, will be a separate feature and will prefer local processing when technically possible.
6. Review dates
Pages show when their content was last reviewed. If a rule depends on a CCNL or interpretation, we say so instead of presenting a universal answer.