About Calculadora España

Who's behind this

I'm Max Fischer, a software engineer.

Calculadora España started from a very specific need: working out in seconds how much a benefit would pay, how much a landlord could legally raise the rent, or how much tax you'd owe, without wading through the forms on the relevant government portal. What began as a personal project has grown into a collection of over 253 free calculators covering taxes, social benefits, housing, employment, and everyday life in Spain.

I review and update every calculator, every explanation, and every figure on this site myself. If something looks off or you have a question, email me at [email protected].

Why this site exists

When you need a specific number in Spain (how much Active Insertion Income you're entitled to, how much your landlord can legally raise your rent this year, how much municipal capital gains tax you'll owe), you're usually left choosing between three options, none of them great. Official government calculators are reliable but often clunky, with unexplained fields, long forms, and poor mobile support. Commercial comparison sites look nicer, but are usually built to sell you an insurance policy or financial product by the end. And a plain Google search gives you the formula, but doesn't do the maths for you.

The idea behind this Spain calculator site is simple: lightweight, free tools with no sign-up required, and the official source linked right below every result so you can check it yourself. If you just need a number, you'll have it in seconds. If you want to understand where it comes from, the relevant regulation is right there underneath.

This site is funded by advertising. Advertising never influences calculations or recommendations, and ads are always clearly separated from the content.

How each calculator is built and checked

Every calculator goes through the same process before it's published:

1. Official source research. Before writing a single line, I gather the applicable rules: the BOE (Spain's official gazette), ministerial orders, guidance from SEPE, Social Security, the Tax Agency, or whichever body is relevant to the topic. Sources are linked directly on the page itself, not buried in a footer.
2. Implementation and validation. The calculation logic is checked against official worked examples and, where one exists, against the equivalent public calculator, until the figures match to the cent.
3. Ongoing review. I regularly check whether amounts, percentages, and deadlines are still current, whether links to official sources still work, and whether special cases are properly documented.
4. Updates when rules change. When a law, the IPREM, the minimum wage, or an income threshold changes, every affected calculator gets updated.

That said, no calculator replaces advice from a qualified labour consultant, lawyer, or tax advisor in complex situations (self-employment, foreign income, inheritance, unusual family circumstances). The goal is to give you a reliable first read on your situation, not to replace a professional consultation.

Contact

For general questions, suggestions, or to flag an error, email me at [email protected]. More contact details on the Contact page.