Overview

Facturation Express

Facturation Express is a suite of 4 complementary tools for compliance with French e-invoicing (DGFiP reform 2026-2027) and the ADEME tertiary decree.

The 4 products

Sheets → Factur-X

Google Workspace add-on that turns your Google Sheets rows into Factur-X invoices (PDF/A-3 + XML EN 16931).

Target: Freelancers and small businesses — €0 to €19/month

OPERAT Express

Web wizard to prepare your OPERAT declarations (tertiary decree): Enedis/GRDF CSV import, ADEME calculations, import file.

Target: Multi-site SMBs — €90 to €190/year/site

PrestaShop Module

PrestaShop module that automatically generates Factur-X for each B2B order.

Target: E-commerce merchants — €99 to €149 + €49/year

e-invoicing SDK

TypeScript library to connect business software to French e-invoicing.

Target: Software editors — €290 to €990/month

Regulatory timeline

Date	Obligation
1/9/2026	Mandatory reception — all French companies must accept Factur-X invoices
30/9/2026	Annual OPERAT declaration for tertiary buildings ≥ 1,000 m²
1/9/2027	Mandatory issuance for SMBs and micro-enterprises

Important legal notice

Issuer responsibility

These tools generate invoices and prepare declarations. The issuer (you, your store, your software) remains responsible for verification and submission of documents.

None of the tools in this ecosystem automatically submits, transmits to approved platforms, or guarantees fiscal compliance beyond EN 16931 technical validation.

Where to start

Sheets → Factur-X Generate Factur-X from Google Sheets

OPERAT Express Prepare your ADEME declarations

PrestaShop Module Automatic Factur-X on PrestaShop

e-invoicing SDK Integration into your business software