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Editorial policy

Last updated: October 2026

Financial calculators support important decisions, so we follow these commitments.

Who runs the site

The calculators were developed with the help of artificial intelligence tools and reviewed before publication.

Formulas and sources

The English and Spanish calculators use standard financial mathematics (compound interest, present and future value, NPV, IRR, amortization) and values you enter, such as rates, inflation and taxes. They do not embed the tax rules of any specific country.

How we review

Every calculator is tested with worked examples checked by hand. Each page shows its review date, and the formulas and assumptions are visible on the page and in the PDF reports.

Corrections

Found an error? Write to contato@seudominio.com. We fix it as soon as possible and update the review date.