Free banking tools for Spain

Understand your bank in seconds.

Check an IBAN, work out your mortgage payment or the real cost of a loan, and see when your transfer will arrive. Free, with no sign-up, in your browser.

  • Free, with no sign-up
  • What you type never leaves your browser
  • Rules and data from official sources
  • Independent: we're not a bank

Check an IBAN

Paste or type an IBAN from Spain or any other country. We tell you whether it is valid and, if it is Spanish, which bank it belongs to.

Worked out in your browser: nothing you type is sent or stored.

Tools

For everyday questions

Whether an IBAN is right, what you'll pay each month, what a loan really costs and when the money will arrive.

How we work

Clear, free and trustworthy

Guides

What your bank doesn't always explain

Short explanations with examples and the rules that apply in Spain.

Questions

Frequently asked questions

Is bancos.app a bank?

No. It's an independent site of tools and information: it isn't a bank, isn't linked to any institution and will never ask for your passwords, codes or card details.

Do you keep what I type into the tools?

No. Every calculation happens in your browser and nothing is sent. We don't use cookies or analytics either, as the privacy policy explains.

Where does the data come from?

Bank codes from the Banco de España register, holidays from the BOE, the Euribor from the Banco de España's official publication in the BOE, and rules from the legal texts. Every page cites its sources.

Are the calculators exact?

They give estimates from the figures you type. What counts is your bank's offer: compare the TAE and total cost it states.

General information, not financial advice. The calculators give estimates: what counts are the terms of your bank's offer. bancos.app is not a bank and isn't linked to any bank.