Yes, a bank account in Mauritius may need to be declared in France. If you are a tax resident of France, the account must be declared using form 3916, at the same time as your annual income tax return.impots.gouv.fr)
The sensitive issue isn't simply forgetting the form. The CRS system, the automatic exchange of information, and cross-checks make the situation much more visible than before. At the time of writing, impots.gouv.fr still refers to the 2025 version of form 3916-3916 bis, and Article 1736 of the French General Tax Code (CGI) is in force in its version published on July 1, 2026. Always check the version number before filing.impots.gouv.fr)
This guide is intentionally general. Your tax residence, the date of your departure, the nature of the account, and your exact role in the account can change the practical answer, so it's better to consider each case individually rather than drawing hasty conclusions.
Who is required to declare a Mauritian bank account?
The rule applies to individuals, associations, and companies without a commercial form domiciled or established in France. It concerns an account opened, held, used, or closed abroad for all or part of the year, even if you are only a beneficiary of a power of attorney.
In practice, a Mauritian current account, savings account, or business account can be included in the declaration as long as it is linked to your French tax situation. Exceptions exist, but they are limited, so it's best to verify your specific situation before concluding that an account is exempt.
If you are also preparing to move to Mauritius, keep in mind that local taxation, Mauritian tax residency status, and the France-Mauritius tax treaty are all considered together, not separately. You can explore this framework further with [link/information]. the conditions of Mauritian tax resident, Mauritian taxation in 2026 And the France-Mauritius tax treaty.
Which form should I use and when should I submit it?
For a bank account, the correct format is the single form. 3916-3916 bis. It is attached to the overall income tax return, whether you file online or on paper. For foreign bank accounts, box 8UU of form 2042 must be checked, as also mentioned in the... brochure 2042 2026.
Operational summary
| Situation | Practical reflex | Key point |
|---|---|---|
| Bank account in Mauritius | Declare it using form 3916-3916 bis. | The declaration is made with the annual income, not separately. |
| Online declaration | Use the integrated tax return process. | Box 8UU must be checked for foreign bank accounts.impots.gouv.fr) |
| Paper declaration | Download and print the official form. | The form is available on impots.gouv.fr. |
| Account opened, used or closed during the year | Declare the event in the relevant year. | The field covers opening, use, and closing. |
The deposit is therefore made at the time of your tax return, not several months later. If you are in a transition period between France and Mauritius, remember one thing above all: the account does not disappear from the tax radar simply because it is Mauritian.
How the riot police make control easier
The CRS does not replace your French tax return, but it supplements it. On the Mauritian side, financial institutions collect tax residency and NIF information for automatic exchange, as explained the official tax administration page on self-certification, and the MRA indicates that Mauritius has been exchanging information under CRS since 2018 with approximately 140 jurisdictions.
In short, if you open an account in Mauritius while remaining a French tax resident, the bank may ask you for a self-declaration of tax residency. This facilitates the cross-referencing of information between government agencies. This is a practical explanation of how the process works, not a promise that every case will be handled in exactly the same way.
If you are already organizing your departure, the best approach is to first check your overall tax status, then the mechanics of your account. You can rely on France-Mauritius tax comparison to place the CRS within a broader vision of your installation.
What are the penalties for forgetting or failing to declare?
The details are in Article 1736 of the French General Tax Code. Failure to declare a foreign bank account typically results in a fine of €1,500 per account. If the account is located in a state or territory subject to the surcharge stipulated in the legislation, the amount can be increased to €10,000 per account. For a filed but inaccurate or incomplete declaration, the penalty can be €150 per omission or inaccuracy, up to a maximum of €10,000 for the information in question.
The good news is that an oversight is best corrected sooner rather than later. As soon as you notice an overlooked account, you should rectify it without delay, because the administration also considers good faith, the delay, and the overall consistency of the file.
What information should I prepare before filling out the 3916 form?
The form primarily requests identification information, not a complete legal file: account number, name and address of the managing organization, opening date, closing date (if applicable), type of account, and whether the account holder has a power of attorney or is the owner. The official form does not specify any supporting documents to be attached to the submission itself. This is a practical guideline, not a general waiver of the requirement to retain evidence.
- Keep the bank statement or account opening contract to find the exact account details.
- Note the full name of the Mauritian bank and its address.
- Gather the opening dates and, if necessary, the closing dates.
- Check if you are the holder, joint holder or only beneficiary of a power of attorney.
- Keep a copy of your submitted declaration so you can respond quickly to the administration if they contact you.
On the form's opening page, impots.gouv.fr requests information consistent with the account data, which confirms that it is essential to fill it out neatly rather than submitting numerous unnecessary supporting documents.impots.gouv.fr)
Mauritian organizations to be aware of during installation
French tax returns are handled by the DGFiP (French Public Finances Directorate), but many readers are also preparing for their arrival or business activities in Mauritius. In this case, several organizations often come into play depending on the topic.
- EDB : for investment projects and permits related to residence, particularly in settlement and employment arrangements.edbmauritius.org)
- PIO : for passport, immigration and visa matters. (police.govmu.org)
- CBRD And Registrar of Companies : for company registration, obtaining a Business Registration Number and completing business formalities.companies.govmu.org)
- Civil Status Office, via the Civil Status Division (CSD): for civil status documents and related certificates. (csd.govmu.org)
- MQA : for the equivalence of qualifications and the recognition of training. (mqa.govmu.org)
- NTA : for the registration, licensing and regulation of land transport. (landtransport.govmu.org)
Their role is not part of the 3916 service itself, but they often structure the settling-in sequence of an expatriate, especially when residence, employment, family and business creation are progressing at the same time.
FAQ on declaring a Mauritian bank account
How to declare a bank account opened abroad, for example in Mauritius, via form 3916 and when to do it?
You declare the account at the same time as your annual income tax return. Online, the filing process includes form 3916 / 3916 bis. If filing on paper, you download the form and attach it to your return. For a bank account, box 8UU of form 2042 must be checked. If the account was opened, used, or closed during the year, it is included in the tax return for the corresponding year.
What are the penalties for forgetting or failing to declare a foreign bank account in France?
Failure to file the 3916 form can result in a fine of €1,500 per account. The legislation also stipulates a penalty of €10,000 in certain cases related to the territories covered by the surcharge. If you have correctly declared the account but with an error or omission, the penalty can be €150 per inaccuracy, up to a maximum of €10,000 for the information in question. The practical principle is simple: it's better to correct the error quickly than to let the oversight persist.
Does the CRS system require the declaration of Mauritian accounts held by a French resident, and how is this verified?
The CRS (Customer Relationship System) does not create the French obligation on its own, as this already exists if you are a tax resident of France. However, the CRS helps tax authorities cross-check information. Banks collect a self-certification of tax residence and tax identification number (NIF), and Mauritius has been exchanging information via the CRS since 2018 with a wide network of jurisdictions. In practice, this makes non-declaration more visible.
How to fill in box 8UU on form 2042 when declaring a foreign account with form 3916?
Box 8UU corresponds to accounts opened, held, used, or closed abroad. You check it when you attach a 3916 or 3916 bis form for a foreign bank account. Do not confuse it with 8TT, which concerns capitalization or life insurance contracts taken out abroad. In practice, 8UU simply informs the tax authorities that a bank account outside of France has been declared on your 2042 form.
Where can I download form 3916 and what supporting documents should I attach when declaring foreign accounts?
At the time of writing, a search for 3916 on impots.gouv.fr returns the 2025 version of form 3916-3916 bis. The document is completed with account details, bank name, dates, and ownership status. It does not require any supporting documents to be included with the submission itself. In practice, keep your statements and account opening documents so you can respond quickly if the tax authorities request further information.
And now ?
If your arrival in Mauritius is underway or already confirmed, take the time to secure both your French tax status and your local settlement. You can start by the conditions of Mauritian tax resident, then link your situation to a tax comparison between France and Mauritius and return to the homepage EXPAT MAURITIUS to organize the next steps of your project.
