Verify Italian Tax Code
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Frequently Asked Questions
Everything you need to know about Italian Tax Code validation
How is the Italian Tax Code structured?
The Italian Tax Code consists of 16 alphanumeric characters: 3 letters for surname, 3 for first name, 2 digits for birth year, 1 letter for month, 2 digits for day (women add 40), 1 letter and 3 digits for the cadastral code of the birth municipality, and 1 final check letter.
How is the check character calculated?
The check character (16th character) is calculated by summing the values of the first 15 characters according to two different tables for even and odd positions. The remainder of dividing the total sum by 26 determines the check letter (A=0, B=1, etc.).
How is gender determined from the Tax Code?
The birth day (digits 10 and 11) also indicates gender: for women, 40 is added to the actual birth day. Thus a value from 01 to 31 indicates male, while a value from 41 to 71 indicates female.
Does the tool also verify the birth municipality?
The tool shows the cadastral code (Belfiore code) of the birth municipality extracted from the Tax Code, but does not verify whether the code actually corresponds to a real municipality. This would require a complete database of cadastral codes.
How do I tell whether an Italian tax code is valid?
A tax code is formally valid when it has sixteen characters in the right sequence of letters and digits, and the last character matches the one recomputed from the first fifteen. The check tests both.
What can be read inside an Italian tax code?
The code carries three letters from the surname and three from the first name, the date of birth, the sex and the cadastral code of the town of birth. A day of birth above 40 means a woman.
Does the check also say whether the town exists?
It shows the cadastral code of the town of birth as read from the tax code, but it does not check that the code really belongs to an Italian town: that would take the full list of cadastral codes.
Does my data stay private?
Yes, and not because we promise it: this tool runs entirely inside your browser. What you type or upload never leaves your device, so it never reaches a server of ours and there is nothing we could keep, read or lose. You can check it yourself: open the page, disconnect from the internet, and the tool keeps working.
Do you store what I enter?
No. There is no database behind this tool: we do not store your files, your text or your results. When you close the tab nothing is left — not here with us, because it never arrived, and not anywhere else.
Do you profile me? Are you GDPR compliant?
We do not profile you: there is no account to create, we never ask for your email to use a tool, and we keep no profile of what you do. We are an Italian company and we work under the GDPR and the other European rules, with the privacy notice and the consent request in plain sight. One thing we say in full rather than hiding it behind a slogan: the ads on the page are Google's, and Google may use cookies to personalise them. You decide from the consent banner: if you say no the ads stay, but they are not personalised, and the tool works exactly the same.
If it is free, how do you make money?
From the ads on the page, and that is all. We do not sell your data, there is no hidden paid plan, there is no limit that eventually asks for your card, and you do not have to sign up. The ads pay for the servers and for the time we spend writing the tools: that is how we can keep them open to everyone.