Frequently asked questions about our calculators

Yes. You can use every calculator at no cost and without creating an account.

Results are based on documented formulas and the values you enter. They are estimates: tax, payroll and pension calculations may vary with your personal circumstances.

We calculate with decimal arithmetic and round at the end, or when an amount is fixed, such as a loan payment. Each currency's decimals are respected.

Every calculator includes its formula, the meaning of each variable, the assumptions and a worked example below the form.

Yes. Calculators with amounts let you choose euros, US dollars, Mexican, Colombian, Argentine or Chilean pesos and Peruvian soles. The currency changes the formatting; it does not convert amounts.

Spain, Mexico, Colombia, Argentina, Chile and Peru. The tax, payroll and pension calculators work with the percentages you enter; each country's official rules will be added once verified.

No. The tools are informational and educational. For important decisions, consult a qualified professional.

There is no need. Calculations run in your browser and preferences such as theme or currency are stored only on your device.

Write to us from the contact page with the calculator, country, tax year and the values you entered.

Yes. Use the language switcher in the header to change between Spanish and English.