how to find it or recover it if lost

through Dorothy Perry January 26, 2023

Tax number: what is it?

A tax number is an identifier automatically assigned by the Tax Department to all natural persons liable for tax in France. Also called NIF for “Fiscal Identification Number”, it is assigned when an individual is registered in the database of the General Directorate of State Finance (DGFIP).

What you need to know about the personal tax number:

  • It is unique: each person has a single tax ID for all tax procedures as an individualIts purpose is to avoid fraudulent links on your behalf
  • Lifetime is fixed
  • It consists of 13 digits
  • It always starts with 0, 1, 2 or 3

Good to know: for businesses, is the equivalent of a tax number SIREN number It consists of 9 digits. On the other hand, the self-employed A micro-enterprise, like individuals, must have a tax number issued by the tax authorities when registering. consists of 14 digits. So, if you are a sole proprietor, you have a tax number (13 digits) as an individual and another number (14 digits) as a professional.

Where to find your tax number: which documents?

The tax number is mentioned in several documents. First, you can find it in your tax documents,

What documents are these? ?

  • Pre-filled tax return: mentioned at the top of the first page


  • All your tax notices (income tax, property tax, etc.): it appears on the top left of the first page, in the “Your references” box.


Warning: if your tax family consists of several people, several tax numbers will be mentioned in the above-mentioned documents. So check if you are “Declares 1” where “Announcement 2”.

In addition, your tax number is also displayed from the date of tax withholding on your pay slip. It is noted in the box below the title in the upper right part of the document ” Registration number “.

Finally, if you are busy with your own business You can find your 14-digit tax number on your business property assessment notices. It appears on the top left of the first page, in the “Your References” box.


If you cannot find the documents mentioned above, there are several solutions to recover a lost tax number.

First, you can redeem it directly online.

Warning: This process needs to be earlier Filled and verified your mobile number in your personal space. If not, skip directly to solution #2 detailed below.

Solution n°1: get your tax number online

Solution #2: Get your tax number over the phone

If you can’t get your tax number online, you can contact the State Financial Center by phone to ask for it.

To do this, you must provide your contact person with your full citizenship status (surname, first name, date and place of birth) and answer other questions that will allow you to be officially identified.

See this article to learn how to contact taxes.

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