E-invoicing in France: what has applied since 1 September 2026, and the impact on outsourced accounting

France’s e-invoicing reform, postponed several times, entered its rollout phase on 1 September 2026. For a company that entrusts all or part of its accounting to a third party, it changes the division of tasks — and sets precise deadlines.

The calendar

According to the calendar published by Pennylane and the tax administration’s practical guide:

• 1 September 2026: every VAT-registered company must be able to receive electronic invoices through an approved platform. Large and mid-sized companies must also issue them and transmit transaction data (e-reporting).
• 1 September 2027: SMEs, very small businesses and micro-enterprises must in turn issue their invoices electronically and carry out e-reporting.

Invoices go through an approved platform, registered by the tax administration, that receives, issues and transmits them. Exchanging PDFs by email is no longer enough.

What it changes for outsourced accounting

Your accounting provider cannot bring you into compliance alone: choosing the platform, officially designating it and the quality of invoicing data are the company’s responsibility. But outsourced accounting is well placed to help, because flows are being standardized:

• Reception: supplier invoices arrive in a structured format, easing automatic entry and reconciliation — at the price of checking for anomalies (duplicates, amounts, VAT).
• Issuance: customer data (company ID, billing address, order number) must be accurate at source; an error is rejected or blocks payment.
• E-reporting: some transaction data must be sent to the administration, on its own schedule.

A checklist for business owners

1. Map your current invoicing tools and their compatibility with an approved platform.
2. Choose and designate your platform in the official directory; check that it interfaces with your management or accounting tool.
3. Clean your reference data: customer records, identifiers, payment terms.
4. Put in writing who does what with your accountant: who receives, who validates, who fixes a rejection.
5. Plan training for those who issue or validate invoices, before the deadline for your category.

A point of vigilance: data

An invoice contains personal and commercial data. Entrusting that flow to a provider requires the usual guarantees: confidentiality, limited access, known hosting — see our approach to compliance. Automation doesn’t excuse you from knowing who sees what.

This article is general information on the calendar; precise terms (thresholds, exceptions) should be checked against official sources or with your advisor.

Sources

• Pennylane — E-invoicing calendar (in French)
• impots.gouv.fr — E-invoicing practical guide (in French)
• Journal du Net — Are you ready for e-invoicing? (in French)