Mandatory e-invoicing in Europe: everything your business needs to know

Paper invoices and PDF attachments sent by email are fast becoming a thing of the past. Across Europe, governments are rolling out mandatory e-invoicing requirements, and the pace of change is accelerating. Whether you operate in France, Spain, Germany or beyond, the question is no longer if your business will be affected: it is when, and how prepared you will be when the deadline arrives.

This guide covers everything you need to know: the regulatory context, who is affected, key deadlines by country, the technical requirements, and the first concrete steps to take today.

1. Why is e-invoicing becoming mandatory?

The push towards mandatory electronic invoicing is driven by three converging objectives shared by tax authorities across Europe and beyond:

• Combating VAT fraud. The European Commission estimates that VAT fraud costs EU member states over €60 billion annually. Electronic invoicing, with its structured data and automated reporting to tax authorities, dramatically reduces opportunities for manipulation.
• Simplifying tax administration. When invoices are issued in machine-readable structured formats, tax declarations can be pre-populated automatically: reducing the administrative burden on businesses and improving accuracy.
• Accelerating the digital transformation of economies. Mandatory e-invoicing is part of a broader shift towards fully digital supply chains, faster payments, and real-time financial visibility.

At the European level, the VAT in the Digital Age (ViDA) directive, adopted in 2024 and progressively entering into force from 2028, sets a unified framework for e-invoicing and digital reporting across all EU member states. National mandates, however, are already rolling out ahead of ViDA, each with their own timelines and technical specificities.

2. Who is affected?

The short answer: virtually every business. While the specific scope varies by country, the general principle is consistent across all European mandates:

• All businesses registered for VAT are affected: from large corporations to SMEs, sole traders and micro-enterprises.
• B2B (business-to-business) transactions are the primary target, with B2C and cross-border transactions following in subsequent phases.
• B2G (business-to-government) e-invoicing has already been mandatory in most EU countries for several years and serves as the foundation for B2B mandates.

In most countries, implementation is phased: large companies face earlier deadlines, with SMEs and sole traders given additional time to adapt.

3. Key deadlines by country

France

France’s e-invoicing reform is one of the most advanced in Europe. Following the abandonment of the Public Invoicing Portal (PPF) in October 2024, the only route for compliance is through a certified platform (plateforme agréée, or PA).

Spain

Spain has two distinct but complementary regulatory frameworks running in parallel:

Germany

Germany introduced mandatory B2B e-invoicing from 1 January 2025 for the receipt of electronic invoices. Issuance obligations follow a phased schedule: large companies from 1 January 2027, and all other businesses from 1 January 2028.

Across Europe and beyond

Belgium, Poland, Croatia, Greece, Romania and Slovakia all have mandates entering into force between 2026 and 2027. The ViDA directive will harmonise these national approaches from 2028 onwards. Outside the EU, countries including the UAE, Malaysia, the Philippines and Morocco have also introduced or announced e-invoicing mandates.

4. What does e-invoicing actually require?

Structured electronic formats

A key distinction: an e-invoice is not a PDF sent by email. For an invoice to qualify as a legally compliant electronic invoice, it must be issued in a structured, machine-readable format that allows automated processing. The main formats recognised across Europe are:

• Factur-X (France, Germany): a hybrid format combining a human-readable PDF with an embedded structured XML file. Particularly suited to SMEs.
• UBL (Universal Business Language): an international XML standard widely used across Europe and beyond.
• CII (Cross Industry Invoice): a UN/CEFACT standard XML format, also used in hybrid formats such as Factur-X and ZUGFeRD.
• Facturae (Spain): the native Spanish structured format, already mandatory for B2G transactions since 2015.
• EDIFACT: used primarily for large-scale EDI exchanges between major trading partners.

Plain PDFs, Word documents or image files will not be accepted as legally valid e-invoices once mandates are fully in force.

Mandatory data fields

Structured e-invoices must include all standard invoice information (VAT numbers, supplier and buyer details, line items, amounts, payment terms) plus, in most countries, additional mandatory fields:

• France: SIREN/SIRET number of the buyer, delivery address if different from the billing address, transaction type (goods, services or mixed), VAT payment option.
• Spain: the invoicing software must generate a unique record identifier, a digital hash ensuring tamper-proofing, and a QR code linking to the AEAT’s verification portal.

Transmission and reporting

Beyond the invoice itself, most mandates impose reporting obligations to tax authorities:

• France: e-reporting of B2C and cross-border transactions to the tax authority (DGFiP).
• Spain (Verifactu): optional or mandatory real-time transmission of invoice records to the AEAT, depending on the taxpayer’s chosen mode.
• Germany: structured invoice data flows from issuer to receiver, with no centralised clearance model.

Long-term archiving

Electronic invoices must be retained for the legally required period with guaranteed integrity, authenticity and accessibility. In France, this is 10 years for accounting purposes. In Spain, 4 years for tax purposes and 6 years under commercial law. Archiving must use qualified timestamping and tamper-proof storage — not simply saving files to a shared drive.

5. What changes compared to today?

For finance and accounting teams, this means a significant shift in how invoices are created, sent, received and stored. For IT and software teams, it means integrating your ERP or accounting software with certified platforms and ensuring your systems generate the required structured formats.

6. The first steps to take today

Whatever your company size or country of operation, the time to act is now. Here is a practical starting framework:

• Step 1 — Map your invoice flows. Identify the volume and types of invoices you issue and receive (B2B domestic, B2G, B2C, cross-border). This determines which obligations apply to you and in what order.
• Step 2 — Audit your current tools. Does your accounting software or ERP generate structured formats? Is your current invoicing system compliant with the incoming mandates? If not, what updates are needed?
• Step 3 — Choose your certified platform. In France, you must designate a certified platform (plateforme agréée) via a formal mandate signed by your legal representative. In Spain, you must ensure your software is Verifactu-certified. In both cases, selecting your platform early gives you time to integrate, test and train your teams before the deadlines.
• Step 4 — Plan your archiving strategy. Determine how and where you will store e-invoices for the required retention period, with the legal evidential value required.
• Step 5 — Train your teams. Finance, accounting, procurement and IT teams all need to understand the new workflows and their responsibilities under the new framework.

7. Frequently asked questions

Q — Is a PDF sent by email a valid e-invoice?

No. Once the mandates are fully in force, only structured electronic invoices in approved formats (Factur-X, UBL, CII, Facturae etc.) will be legally valid. A PDF, even a digital one, does not qualify as a structured e-invoice under current European regulations.

Q — Does mandatory e-invoicing apply to sole traders and micro-businesses?

Yes, but with later deadlines in most countries. In France, sole traders must comply from 1 September 2027. In Spain, sole traders (autónomos) must use Verifactu-certified software from 1 July 2027. The obligation applies regardless of company size.

Q — What happens if we miss the deadline?

Penalties vary by country. In France, non-compliant certified platforms face fines of up to €45,000 per year. In Spain, businesses using non-certified software can be fined up to €50,000 per year; software providers face fines of up to €150,000. Beyond financial penalties, invoices issued outside the required framework may lose their fiscal validity.

Q — Do we need a different solution for each country we operate in?

Not necessarily. A well-designed global e-invoicing platform will support multiple country mandates natively, handling format translation, routing to the relevant tax authority, and legal archiving — all from a single integration. This is particularly important for multinationals and companies with cross-border supply chains.

Q — How long does it take to implement an e-invoicing solution?

It depends on your current systems and the complexity of your invoice flows. A straightforward API integration with an ERP can be operational in a few weeks. A full deployment across multiple entities and countries typically takes three to six months. Starting early gives you time to test, train and resolve issues before the regulatory deadline.

Q — What is the difference between e-invoicing and e-reporting?

E-invoicing refers to the structured electronic exchange of invoices between businesses (B2B) or between businesses and government (B2G). E-reporting refers to the obligation to transmit transaction data, typically from B2C or cross-border sales, directly to the tax authority, even when the underlying invoice does not go through a certified platform.