# 10 Essential Questions About TIN in France

> Verify French Tax IDs (SIREN, SIRET & VAT) instantly. Prepare for the 2026 e-invoicing mandate, navigate the RNE and INSEE registries, and ensure seamless KYB with TaxDo.

Source: https://taxdo.com/resources/faq/post/verify-france-siren-siret-tin

Last updated: 2026-04-17

In one of the world’s most sophisticated economies, a precise understanding of France’s Tax Identification Numbers (TIN) — specifically the **SIREN**, **SIRET**, and the **VAT Number** — is essential for ensuring corporate compliance, managing KYB (Know Your Business) checks, and navigating the 2026 transition to mandatory e-invoicing. France’s digital tax landscape, governed by the DGFiP and INSEE, is highly automated and strictly monitored, making real-time verification a technical necessity for any entity operating within or trading with the Republic.  
Having a single trusted resource that answers every key question in one place makes all the difference between seamless operations and costly administrative friction. This FAQ blog delivers clear, complete answers to the 10 most essential questions about French TINs — from definition and formats to the 2026 digital mandates.  
Businesses that make the smart choice to use [TaxDo’s GTL (Global TIN Lookup)](https://taxdo.com/services/tax-id-validator) connect instantly to official French national registries, complete every check in one click, and eliminate manual errors—ensuring fast, accurate, and fully compliant Tax ID verification for tax, onboarding, customs, and regulatory reporting purposes.

## Frequently asked questions

### 1. What is a TIN in France?

In France, the concept of a Tax Identification Number is divided between business identifiers and personal tax numbers.

For businesses, the primary identifier is the **SIREN** (_Système d'Identification du Répertoire des Entreprises_), a 9-digit number that remains with the legal entity for its entire life. For individuals, the TIN is the **SPI** (_Simplification des Procédures d'Imposition_), also known as the _Numéro Fiscal_. These numbers are the foundation of all interactions with the French state, from filing corporate income tax to processing social security contributions.

### 2. What types of TIN numbers exist?

France utilizes a hierarchical system of identifiers to categorize taxpayers at different administrative levels:

- **SIREN:** The 9-digit master identifier for the legal entity.
- **SIRET:** A 14-digit identifier for a specific establishment (SIREN + a 5-digit NIC suffix). A company has one SIREN but can have multiple SIRETs for different locations.
- **VAT Number (TVA Intracommunautaire):** An 11-digit number (prefix "FR" + 2-digit key + 9-digit SIREN) used for intra-EU trade.
- **SPI (Numéro Fiscal):** The 13-digit personal tax ID for individuals and sole traders.
- **IACS Number:** A specialized identifier used for agricultural entities receiving EU subsidies.

### 3. What is the format of the TIN?

French identification numbers follow strict mathematical patterns designed for large-scale automation.

- **The SIREN Structure:** Consists of exactly **9 numeric digits** (e.g., `123 456 789`).
- **The SIRET Structure:** Consists of exactly **14 numeric digits** (e.g., `123 456 789 00012`).
- **The VAT Structure:** Comprised of the prefix "**FR**" followed by a 2-digit control key and the 9-digit SIREN (e.g., `FR 12 123456789`).

**Technical Insight:** The SIREN and SIRET numbers are validated using the **Luhn algorithm (Modulo 10)**. The VAT number’s 2-digit key is calculated using **Modulo 97**. Because French tax authorities are moving toward mandatory real-time e-reporting in 2026, validating the 14-digit SIRET is critical; it ensures that the tax invoice is correctly attributed to the specific physical establishment responsible for the supply.

### 4. Which authority issues the TIN?

The [INSEE](https://www.insee.fr/fr/accueil) (National Institute of Statistics and Economic Studies) is responsible for managing the **Sirene** register and issuing SIREN/SIRET numbers.

The [DGFiP](https://www.impots.gouv.fr/) (General Directorate of Public Finances) manages VAT numbers and personal tax IDs (SPI). For new business registrations, all procedures are now centralized through the **INPI One-Stop Shop** (_Guichet Unique_).

### 5. Who needs to register for a TIN?

**VAT Registration Thresholds:**

- **Mandatory Registration:** As of 2026, thresholds are approximately **€91,900** for sales of goods and **€39,100** for services.
- **Mandatory E-Invoicing (2026):** Starting **September 2026**, all large and mid-sized French companies must be able to receive electronic invoices via the **PPF** (Public Portal) or a certified **PDP** (Private Platform), making verified SIRETs indispensable.

**VAT Rates (2026):**

- **Standard Rate:** 20% (Applies to most goods and services).
- **Reduced Rates:** 10% (Catering, transport), 5.5% (Food, books), and 2.1% (Press, reimbursed medicines).

### 6. How to register or apply for a TIN?

The registration process is now 100% digital via the national **Guichet Unique**.

- **Step 1: The One-Stop Shop:** All entities must register through the [INPI Procedures Portal](https://procedures.inpi.fr/). This portal replaces all previous physical "CFE" centers.
- **Step 2: Automated Issuance:** Once the INPI validates the dossier, **INSEE** assigns the SIREN and SIRET numbers automatically.
- **Step 3: VAT Activation:** For intra-EU trade, you must request the activation of your VAT number via the **SIE** (Corporate Tax Service) in your professional area.
- **Step 4: Non-Residents:** Foreign companies without a permanent establishment in France must register via the **EE-NR** (Foreign Enterprise Tax Service) in Noisy-le-Grand.

### 7. How to verify a TIN in France?

The most reliable way to verify a French TIN is through official national registries that track active vs. inactive (radié) statuses.

- **Sirene Registry:** Use [Sirene.fr](https://www.sirene.fr/) to confirm the legal existence of a SIREN or SIRET.
- **VAT Check:** Validate "FR" numbers via the **VIES** system or the French **Sirene** portal (which now links VAT statuses).
- **RNE Check:** The [National Register of Companies (RNE)](https://data.inpi.fr/) provides deeper KYB data, including beneficial ownership.

Because a SIREN can be active while a specific branch (SIRET) is closed, manual checks are inefficient for large-scale operations. Enterprise teams use [automated real-time lookups](https://taxdo.com/services/tax-id-validator) to ensure every identifier is valid before processing 2026 e-invoices.

### 8. How TaxDo Helps Companies with TIN Compliance in France

Navigating the transition to mandatory e-invoicing in 2026 requires flawless data hygiene. TaxDo automates the verification of the hierarchical French system:

- **GSV (Global Syntax Validation):** Provides **Luhn** and **Modulo 97** checks for the SIREN, SIRET, and VAT numbers, ensuring data is mathematically sound before entering your ERP.
- **GTL (Global Real-Time Tax ID Verify/Lookup):** Connects directly to **INSEE** and **DGFiP** databases. [TaxDo’s GTL ensures your partners are active](https://taxdo.com/services/tax-id-validator) and correctly registered in the RNE, preventing e-invoicing rejections and VAT fraud.

**TaxDo TIN Validation Coverage in France**

| **Entity Type** | **Identifier Type**   | **Covered by Product**      |
| --------------- | --------------------- | --------------------------- |
| Business        | **VAT Number**        | **GTL (Official Lookup)**   |
| Business        | **SIREN (Base ID)**   | **GTL (Official Lookup)**   |
| Business        | **SIRET (Branch ID)** | **GTL (Official Lookup)**   |
| Business        | **SIREN / SIRET**     | **GSV (Syntax Validation)** |
| Business        | **IACS (Agri ID)**    | **GSV (Syntax Validation)** |
| Individual      | **SPI (Tax ID)**      | **GSV (Syntax Validation)** |

### 9. What are the uses of TIN for businesses in France?

A verified SIREN and SIRET are the essential keys for e-invoicing, KYB due diligence, and social reporting in the French market.

| **Business Context** | **Key Usage of TIN (SIREN / SIRET)**             | **Compliance Criticality**                                                                     |
| -------------------- | ------------------------------------------------ | ---------------------------------------------------------------------------------------------- |
| **E-Invoicing**      | Routing invoices through the **PPF** or **PDP**. | **Blocker:** Invoices without a valid SIRET will be rejected by the 2026 mandate.              |
| **KYB & AML**        | Verifying ownership and status via the RNE.      | **Mandatory:** Banks and B2B platforms must verify SIRENs to prevent "shell company" fraud.    |
| **Customs**          | Linking the **EORI** number to the SIREN.        | **Blocker:** Goods will be held at Le Havre or Marseille without a verified SIREN-linked EORI. |
| **Social Security**  | Filing the **DSN** (Social Declaration).         | **Mandatory:** The SIRET is required to report employee contributions to URSSAF.               |

### 10. What happens if a TIN is incorrect or missing?

Using an unverified French TIN exposes businesses to immediate financial and operational risks:

- **E-Invoicing Failure:** Starting September 2026, an incorrect SIRET will cause your tax invoice to be automatically rejected by the public platform, leading to severe payment delays.
- **KYB Rejections:** If a SIREN is listed as "dormant" or "radié," your partners are legally required to stop payments or terminate contracts under AML vigilance rules.
- **VAT Penalties:** Incorrect VAT formats can lead to the rejection of input tax credits, turning a 20% VAT cost into a permanent loss.
- **Customs Seizures:** EORI numbers not correctly mapped to an active SIREN will result in immediate customs holds on all imports.

## Conclusion

France’s tax system is transitioning to a future where every transaction is reported in real-time. A valid SIREN proves a legal entity exists, but the **SIRET** is the ground-truth identifier for where business actually happens.

[TaxDo](https://taxdo.com/services/tax-id-validator) provides the critical automation layer needed to navigate France's high-stakes e-invoicing and KYB environment. By integrating TaxDo’s GTL and GSV solutions, you eliminate the risks of manual entry and ensure your French operations are 100% compliant with the latest 2026 mandates. Don't risk blocked invoices or customs delays—automate your French tax ID verification with TaxDo today.