French e-invoicing 2026: certified platforms, reliable audit trail and what really changes for your business

France's mandatory e-invoicing reform is often presented as a technology upgrade. That framing is incomplete. The reform restructures the flow of tax data between businesses and the administration (DGFiP), but it does not create the reliable audit trail obligation. It makes that obligation more visible, because invoices will now be transmitted to the DGFiP in real time.

For a business owner or CFO, this means two separate workstreams:

1. Selecting and connecting an approved platform (plateforme agréée, PA, formerly PDP), the only transmission route for invoices between businesses.
2. Documenting the evidence chain that links each invoice to the underlying transaction.

Treating these as a single project is the most common preparation mistake — and the one most likely to leave a compliance gap at the moment of a tax audit.

Source: Direction Générale des Finances Publiques, timetable updated in 2024. Verify at impots.gouv.fr before any deployment decision.

What this means in practice for an SME: from 1 September 2026, even if you are not yet required to issue electronic invoices, you must be able to receive structured electronic invoices from your large suppliers. Your platform must be operational by that date — a full year before your own emission deadline.

The public invoicing portal (PPF) and Chorus Pro#

The PPF is not an alternative to an approved platform for business-to-business flows. Since the refocus announced on 15 October 2024, it neither issues nor receives B2B invoices: it keeps the company directory and centralises the invoicing and e-reporting data that approved platforms send to the tax authority. Chorus Pro, for its part, remains the platform for invoices sent to the public sector (B2G).

In practice, every VAT-registered business must therefore have chosen at least one approved platform to receive its invoices from 1 September 2026.

Approved platforms (plateformes agréées, PA, formerly PDP)#

Approved platforms are private operators registered by the DGFiP. They issue and receive electronic invoices, manage statuses and transmit the required tax data to the PPF.

Our assessment: for an SME issuing more than 100 sales invoices per month with an ERP or accounting software, an approved platform used without a connector generates significant manual workload. An approved platform with a native connector is justified as soon as the cost of manual processing exceeds the subscription fee.

Consider a B2B services SME issuing 200 customer invoices per month and receiving 80 supplier invoices.

With an approved platform but no ERP connector:

• Manual upload and download if no ERP connector is in place.
• Estimated internal effort: 15 to 20 minutes per daily batch, approximately 5 to 7 hours per month.
• Indirect cost at €30/hour fully loaded: €150 to €210 per month.

With an approved platform connected to the ERP:

• Average market subscription observed: €80 to €200 per month depending on volume and features (verify with operator quotes).
• Residual internal effort: rejection monitoring, approximately 1 to 2 hours per month.
• Total cost: €110 to €260 per month, with a saving of 4 to 6 hours and reduced data entry errors.

The direct cost difference is modest. The real gain is data reliability feeding into accounting records and VAT returns.

What article 289 V CGI requires#

Article 289 V of the French Tax Code (Code Général des Impôts) sets four cumulative conditions for an invoice to be authentic and legally probative:

1. Authenticity of origin: the issuer of the invoice must be identifiable with certainty.
2. Content integrity: the data must not have been altered since issue.
3. Legibility: the invoice must remain readable throughout the entire conservation period.
4. Retention: six years under article L102 B of the French Tax Procedures Code (Livre des Procédures Fiscales), ten years for accounting documents under the Commercial Code (article L123-22).

Article 289 bis CGI specifies the conditions for accepting electronically transmitted invoices, including recipient consent and format requirements.

What a reliable audit trail is not#

Simple electronic archiving does not constitute a reliable audit trail. The PAF (piste d'audit fiable) is not a file format question. It is a documentary chain that links, for every invoice, all documents proving the underlying transaction took place.

Minimum recommended chain:

• Signed quote or purchase order
• Delivery note or service completion record
• Invoice issued or received
• Identifiable payment (bank statement, traceable transfer)
• Corresponding accounting entry with matching reference

Without this complete chain, a perfectly formatted electronic invoice can be challenged during a tax audit.

During an accounting audit (vérification de comptabilité), inspectors compare the data in the Fichier des Écritures Comptables (FEC) against invoices issued or received. The reform makes this comparison easier for the administration: transaction data will be available in real time via e-reporting.

Frequent friction points observed in audit files:

• Invoices without an associated purchase order in the information system (flows without upstream evidence).
• Credit notes not justified by a returns document or written agreement.
• Deductible VAT on supplier invoices where origin authenticity is insufficient.
• Discrepancy between invoice date, delivery date and accounting entry date.
• Absence of retained versions when an invoice was modified.

The underestimated risk: many companies assume that switching to electronic invoicing automatically resolves their reliable audit trail requirement. It does not. A Factur-X invoice transmitted via a PDP is technically authentic and integral in the technical sense — but if it is not linked to a purchase order and a traceable payment, the PAF remains incomplete.

Three structured formats are recognised under the reform:

• Factur-X: a Franco-German hybrid format (human-readable PDF with embedded XML data). Recommended for businesses wanting a document readable by humans and processable automatically. Multiple profiles of increasing complexity (MINIMUM, BASIC WL, BASIC, EN 16931, EXTENDED).
• UBL (Universal Business Language): an international XML format widely used in European public procurement and B2B e-commerce.
• CII (Cross Industry Invoice): an XML format derived from the UN/CEFACT standard, used notably in EDI environments.

In practice: if your ERP or invoicing software natively generates Factur-X EN 16931 or EXTENDED, you are aligned with the most complete requirements. If you currently export plain PDFs, a format migration is necessary before September 2026 or September 2027 depending on your company size.

In the migration projects we support, technical blockers rarely appear at the platform selection stage. They emerge when connecting the ERP to the PDP, or when feeding PDP status responses back into the accounting software.

Key 2026 watchpoints:

• Mandatory field mapping: SIREN number, EU VAT number, delivery address, customer order reference — all must be populated in the ERP for the PDP to generate a valid invoice.
• Status management: a transmitted invoice can be accepted, rejected or disputed. The ERP must receive these statuses and trigger a correction workflow. Without this feedback loop, rejected invoices can remain pending without anyone being alerted.
• B2C and cross-border e-reporting: sales outside the e-invoicing scope (B2C, exports) require separate e-reporting. This flow also goes through the approved platform.

A consulting SME (15 staff, €3m revenue) uses an invoicing application that is separate from its accounting system. During migration preparation, three problems emerge:

• 22% of client records contain no SIREN number (legacy clients created before data entry was made mandatory in the software).
• Purchase orders are exchanged by email and not archived in the management system.
• The invoicing software exports plain PDFs and has no connector to a registered approved platform at the time of the audit.

The migration is pushed back by three months to correct the data, create a purchase order archiving procedure, and select compatible software. Without this preliminary audit, the SME would have been technically connected to a PDP but unable to transmit valid invoices on the day.

• Identify your issue obligation date (large companies/ETI: September 2026; SMEs/micro-businesses: September 2027).
• Confirm reception capability by September 2026 (all VAT-registered companies).
• Audit customer and supplier master data: SIREN numbers, EU VAT numbers, billing addresses.
• Verify that your software or ERP generates a recognised structured format (Factur-X, UBL, CII).
• Choose an approved platform (formerly PDP) suited to your volume and ERP integration level.
• Configure status feedback (accepted, rejected, disputed) in your system.
• Document the PAF evidence chain for each flow type (standard sales, deposits, credit notes, subscriptions).
• Verify legally probative archiving for 6 years under article L102 B LPF, and 10 years for accounting documents under article L123-22 of the Commercial Code.
• Train commercial and accounting teams on new workflows.
• Run a pilot on a limited scope before full deployment.

A basic approved platform, without deep integration, may be enough if:

• Volume below 50 sales invoices per month.
• No ERP or management software requiring automated integration.
• Internal resources available to manage flows manually.
• Short-term budget constraints.

An approved platform integrated with your ERP is justified if:

• Volume above 100 invoices per month.
• ERP or accounting software for which a certified connector exists.
• Need for approval workflow and automated status management.
• Wish to integrate legally probative archiving in the same solution.
• Contractual constraints from large clients or group entities that impose their own PDP.

For related compliance topics, see our guides on different VAT rates on an invoice and mandatory tax declarations for businesses in 2026. If your business handles foreign-currency flows, our analysis of multi-currency accounting details the archiving and conversion constraints that apply.

Updated 9 October 2025. Thresholds, formats and implementation dates may evolve: verify current data at impots.gouv.fr and DGFiP publications before any operational decision. This article is for information only and does not replace personalised advice adapted to your flows, systems and legal situation.