France's e-invoicing mandate: integrating an approved platform for foreign suppliers

The verdict in three sentences

Since 1 September 2026, every VAT-registered business in France must be able to receive structured e-invoices, large companies must issue them, and French SMEs follow on 1 September 2027. A supplier based in London or Berlin and not established in France is generally outside the issuance obligation, but its French customers will increasingly expect Factur-X or UBL invoices delivered through an approved platform so their accounts payable stays automated. A custom connector from your ERP falls in Kolonell's simple application bracket, 2,500,000 to 4,000,000 FCFA (3,810 to 6,100 EUR), and takes 6 to 10 weeks.

What the French reform requires, and when

The reform runs through platforms approved by the French tax administration (formerly called PDPs). They exchange invoices between businesses and pass tax data to the public portal. A French e-invoice is not a PDF attached to an email: it is a structured file in one of three core formats, Factur-X, UBL or CII.

The key point for foreign suppliers: your French customer has to e-report what it buys from you. If your invoice arrives as a clean structured file, that reporting is automatic. If it arrives as a scanned PDF, someone in their finance team re-keys it, and your invoice moves to the back of the payment queue. Always confirm your own position with a tax adviser, since VAT establishment rules vary.

Your home market is moving too

ZUGFeRD and Factur-X are technically aligned, so a Berlin supplier that builds one connector can serve French and German clients with the same core logic. A London supplier gets a head start on the UK mandate.

Three integration paths, three budgets

The connector converts invoices into Factur-X or UBL, sends them by API to the platform, pulls back lifecycle statuses and logs every rejection with its reason, so your team fixes the data once.

Mini case study

Lukas, finance lead at an industrial parts supplier in Berlin, sends 300 invoices a month to French customers from an in-house ERP. About 10 % are rejected or re-keyed by French AP teams, so 30 invoices a month, averaging EUR 2,500, get paid about 20 days late. Chasing them costs 30 minutes each, 15 hours a month at EUR 45, or EUR 675. The delayed cash, EUR 75,000 held 20 days longer at a 6 % cost of capital, costs about EUR 250 a month.

With a connector at the top of the simple bracket, 6,100 EUR, and a platform at EUR 100 a month, the net gain is roughly EUR 825 a month. Payback comes in about 7 to 8 months, and the same connector then covers German issuance in 2027 with a format switch rather than a new project.

FAQ

Am I legally required to issue French e-invoices as a foreign supplier?

Generally not if you have no French VAT establishment, but your clients must e-report the purchase. Check your situation with an adviser; the commercial pressure is real from 2026.

Is a PDF by email still accepted?

For now from foreign suppliers, yes, but it costs your client manual work. Structured Factur-X or UBL files are processed without re-keying and paid faster.

How long does a custom connector take?

Six to ten weeks for a single ERP, ten to fourteen weeks when several billing sources must be consolidated. Customer master data clean-up runs in parallel.

Does the connector need maintenance?

Yes, formats and platform APIs evolve. Kolonell maintenance costs 35,000, 75,000 or 120,000 FCFA a month (53, 114 or 183 EUR); Basic is often enough for a stable connector.

Can I switch platforms later?

Yes, if the connector is built with an abstraction layer. Switching then means adapting one module in 1 to 2 weeks.

Let's scope your project. Tell us your ERP, your monthly invoice volume to French clients and your other markets, and we will scope a connector live in 6 to 10 weeks. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.