Italian Tax Code Calculator

How the Italian Tax Code (Codice Fiscale) Calculation Works

The Italian tax code (codice fiscale) is a 16-character alphanumeric code that uniquely identifies each citizen for tax and administrative purposes. It is assigned by the Italian Revenue Agency (Agenzia delle Entrate) and is calculated from a person's personal data.

The Structure of the Tax Code

The 16 characters of the tax code are composed of:

• 3 letters for the surname (first, second, and third consonant; if not enough, vowels are used)
• 3 letters for the first name (same rule as the surname: first three consonants, then vowels if needed; but if the name has more than 3 consonants, the first, third and fourth are used)
• 2 digits for the year of birth
• 1 letter for the month of birth (A=January, B=February, C=March, D=April, E=May, H=June, L=July, M=August, P=September, R=October, S=November, T=December)
• 2 digits for the day of birth (for women, 40 is added, e.g.: born on the 15th becomes 55)
• 4 characters for the cadastral code of the municipality of birth (e.g.: Rome = H501)
• 1 check character calculated with a specific algorithm

Practical Example

For Mario Rossi, born on March 15, 1990 in Rome:

1. Surname ROSSI → RSS (R, S, S)
2. First name MARIO → MRA (M, R, no fourth consonant → A vowel)
3. Year 1990 → 90
4. March → C
5. Day 15 (male) → 15
6. Rome → H501
7. Check character → O

Result: RSSMRA90C15H501O

Homocodia (Duplicate Codes)

When two people generate the same tax code (homocodia), the Italian Revenue Agency resolves the conflict by progressively replacing digits with equivalent letters (0=L, 1=M, 2=N, etc.) to ensure each code is unique.

Reverse Tax Code Lookup

From a tax code, it is possible to determine: date of birth, gender, and municipality of birth. Our calculator also offers this reverse lookup functionality.

When You Need the Tax Code

The tax code is required for: tax returns, employment contracts, opening a bank account, enrollment in the National Health Service (SSN), rental agreements, invoices and tax receipts, and bureaucratic procedures with public administrations.