Who it is for
The site is primarily built for Polish people who live, work or run a business in the Netherlands. Dutch and English versions let them share the same explanation with a partner, employer or adviser.
Creator and responsibility
Michał selects topics, builds the calculators, documents assumptions and publishes corrections. He does not present himself as a tax adviser; practical experience shapes the questions, while official publications determine rates and rules.
More than one final number
A useful result keeps revenue, VAT, expenses, taxable basis, tax, Zvw and personal take-home separate. Guides and full worked examples show how a rule affects the result and which information remains outside the model.
Editorial checks
For an update we first check the original public source, then the formula, boundary values, examples, translations, metadata and internal links. The review date changes only after the entire connected path has been checked again.
Languages and original value
Polish is the primary publication. Translations make the same material understandable and are not presented as artificially different pages merely to increase impressions.
Independent and free
The calculators require no account and entered financial figures remain in the browser. Advertising does not influence formulas, results or recommended content; short legal and supporting pages contain no ad placements.