Two dates must be separated
According to the French tax authority’s guidance, all VAT-liable businesses established in France must be able to receive electronic invoices from 1 September 2026. Issuance starts then for large and mid-sized companies and on 1 September 2027 for SMBs and microbusinesses.
Reception and issuance may therefore start on different dates for an SMB. Businesses under the French VAT exemption regime may also be concerned. Confirm your category, flows and exclusions with an accountant or qualified adviser.
Map flows before choosing a tool
List sales and purchase invoices, credit notes, deposits, domestic B2B transactions, international flows and consumer sales. Identify where invoices are created, where customer data comes from, who approves them and where statuses need to return.
This prevents an interface being selected before data and responsibilities are understood. It also reveals incomplete fields, duplicate customers and exceptions that cannot follow the main flow.
Approved platforms and interoperability
Businesses will use an approved platform for the functions covered by the reform. Ask each provider which operations it supports, how statuses are returned and how data can be exported. A branded connector does not by itself prove interoperability.
Test representative cases without exposing sensitive data: multiple VAT rates, credit notes, deposits, rejection, identity correction and status changes. Document who acts when an invoice cannot be transmitted.
Do not oversimplify e-reporting
E-reporting covers certain flows outside domestic electronic invoicing. Frequencies and deadlines depend in part on the tax regime; the authority publishes an official frequency and deadline table. Do not assume one universal cadence.
Keep tax rules, which require qualified validation, separate from the technical project: formats, access, data migration, interfaces, controls and error logs.
A practical preparation plan
Clean customer and supplier data, appoint an owner, confirm affected tools and write test scenarios. Then validate reception, issuance, status feedback, credit notes and continuity during an outage.
The tax authority also provides a calendar FAQ. Review official sources when the project starts because operational details may change.
What Synerium can deliver
Synerium can map journeys, design interfaces, connect available APIs, organize tests and monitor issues. We do not replace an accountant or tax adviser and cannot independently certify the tax compliance of an accounting process.
A useful first deliverable is a map of data and invoice states, followed by a journey prototype and acceptance plan. Scope depends on available APIs, systems and permissions.
At Synerium, Studio is a scoped website project financed directly by Synerium over 36 months, with launch fees. Source code can be provided on request from month 12 without cancelling the remaining payments; full ownership transfers at month 36. Infinity covers recurring needs: design from Starter, marketing and SEO/GEO from Premium, development from Ultimate. Scope and active capacity depend on the selected plan. An unlimited request queue does not mean a full-time team or unlimited output. Current prices, commitments, exclusions and third-party costs are detailed on the offer pages.
Show us your systems and flows to scope an integration.