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) 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.
10 Essential Questions About TIN in France
Common 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?
3. What is the format of the TIN?
4. Which authority issues the TIN?
5. Who needs to register for a TIN?
6. How to register or apply for a TIN?
7. How to verify a TIN in France?
8. How TaxDo Helps Companies with TIN Compliance in France
9. What are the uses of TIN for businesses in France?
10. What happens if a TIN is incorrect or missing?
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 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.