European E-Invoicing: a complete guide to compliance for 2026

Starting in 2026, Europe is moving toward mandatory electronic invoicing for all intra-EU B2B transactions, driven by the ViDA package (VAT in the Digital Age). This shift marks a fiscal revolution that, beyond reducing tax evasion, aims to build an integrated digital single market.

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European e-invoicing is the system for exchanging invoices in a structured, standardised format, based on the EN 16931 standard, which will become mandatory for all intra-EU B2B transactions from 1 July 2030, under the ViDA package (VAT in the Digital Age). Several Member States — including Belgium, Poland and France — have already introduced earlier national mandates during 2026.

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At a glance

• The ViDA package introduces mandatory cross-border B2B e-invoicing across the EU from 1 July 2030
• Belgium (from 1 January 2026), Poland — via the KSeF system, from 1 February 2026 for large companies and 1 April 2026 for all others — and France (from 1 September 2026) have already made national mandates operational
• The EN 16931 standard defines the common semantic data model for invoices; the updated EN 16931-1:2026 was formally published by CEN on 18 March 2026
• The Peppol network, based on the four-corner model, ensures secure transmission between certified Access Points
• Italian companies need to prepare through ERP gap analysis, choosing a Peppol Access Point, SDI-Peppol integration, reviewing sending timelines, and cleaning up master data

What will change with the ViDA directive

The ViDA directive (VAT in the Digital Age) marks a turning point for VAT management across the European Union. It introduces mandatory B2B e-invoicing for all cross-border transactions starting 1 July 2030, a date confirmed by the ViDA work programme published by the European Commission on 20 May 2026. Several Member States have nonetheless brought the transition forward at national level: Belgium made B2B e-invoicing mandatory from 1 January 2026 (with a tolerance period until 31 March 2026), Poland rolled out its KSeF mandate from 1 February 2026 for large taxpayers, extending to all others from 1 April 2026, and France has confirmed its mandate will take effect on 1 September 2026, with no further delays.

The role of the EN 16931 standard and Peppol

The European e-invoicing system rests on two fundamental pillars: the EN 16931 standard and the Peppol network.

Learn more: Peppol e la fatturazione elettronica: vantaggi e procedure di scambio

1. The EN 16931 standard

This standard defines a single semantic data model for invoices, making invoice formats interoperable across Member States. The updated EN 16931-1:2026 was formally published by CEN (European Committee for Standardization) on 18 March 2026, formalising updates to the semantic model and confirming that Member States may use alternative standards for domestic transactions, provided they remain compatible with the EU-wide framework. With this standard, an electronic invoice issued in Italy can be automatically read and processed in Germany or France, removing the need for manual intervention.

Accepted formats:

• UBL 2.1
• CII (Cross Industry Invoice)

2. Peppol: the transmission network

Peppol is the European infrastructure that ensures the secure transmission of electronic invoices between countries. It uses a “four-corner” model in which the sender and recipient of an invoice are not directly connected, but interface through certified Access Points. This system ensures the security and compliance of cross-border operations.

Key deadlines for European e-invoicing

While the full EU-wide e-invoicing mandate will not apply until 1 July 2030, several Member States have brought their own deadlines forward, with mandates already active in 2026. Here is an updated calendar of the main deadlines:

Country	Mandatory date	Details
Belgium	1 January 2026	B2B mandate for all resident businesses, Peppol BIS 3.0 format. Confirmed in force, with a tolerance period until 31 March 2026; near real-time e-reporting planned from January 2028
Poland	1 February 2026 (large enterprises) – 1 April 2026 (all other enterprises) – 1 January 2027 (micro-enterprises)	Mandate confirmed in force via the KSeF system, for all B2B transactions
France	1 September 2026	Confirmed, final date, with no further delays: receiving obligation for all businesses, issuing obligation for large and medium-sized companies. Small and medium enterprises follow from 1 September 2027
Germany	January 2025/2026	Receiving obligation already active; transition toward mandatory issuance (2027-28)

Operational roadmap: how to prepare for European e-invoicing

For Italian companies, adapting to the new European e-invoicing requirements calls for strategic preparation. Here are the 5 essential steps to ensure compliance:

1. ERP systems gap analysis

Check whether your ERP software can generate UBL files compliant with the EN 16931 standard. If not, the system will need to be upgraded to ensure compatibility.

2. Choosing a Peppol Access Point

Register with a certified provider that can act as a Peppol Access Point to transmit and receive electronic invoices. Choosing the right Access Point is crucial to ensure secure, compliant transmission.

3. SDI-Peppol integration

Companies already using the Sistema di Interscambio (SDI) for domestic e-invoicing will need to integrate bridge solutions that automatically translate invoices issued in the national format into the European format required by foreign partners.

4. Reviewing sending timelines

Prepare to send electronic invoices quickly, ideally within 2-10 days of the transaction. The European system provides for near real-time reporting, so companies will need to align their sending processes accordingly.

5. Data quality and master data

Clean up supplier and customer master data, making sure identification codes (such as the VAT ID or Peppol Participant ID) are correct. Errors in this data can lead to automatic invoice rejection.

Intesa’s solution: full support for international e-invoicing

Intesa offers an integrated platform for international e-invoicing, designed to simplify adaptation to European regulations. Our solution ensures:

• Full compliance with ViDA and Peppol requirements
• Integration with the Italian SDI system and the Peppol network for international exchanges
• Compliant archiving of electronic invoices, in line with European document retention standards
• End-to-end support for ERP system upgrades and intra-community transaction management

Discover Intesa’s solution for international electronic invoicing.

Glossary

• ViDA (VAT in the Digital Age): EU regulatory package introducing mandatory e-invoicing and digital reporting for intra-EU B2B transactions from 2030
• EN 16931: European standard defining the common semantic data model for electronic invoices
• Peppol: European network for the secure exchange of electronic documents between certified Access Points
• Access Point: certified node through which sender and recipient interface on the Peppol network
• UBL / CII: structured formats accepted for electronic invoices compliant with the EN 16931 standard
• SDI (Sistema di Interscambio): Italian platform for domestic e-invoicing
• KSeF (Krajowy System e-Faktur): Poland’s national mandatory e-invoicing system

Conclusion: get ready for European e-invoicing with Intesa

2026 is a pivotal year for fiscal digitalisation across the European Union. With the adoption of mandatory B2B e-invoicing, Italian companies trading abroad need to prepare for a new digital interoperability system. Intesa offers an integrated solution that supports businesses through every phase of the transition. Don’t risk being unprepared: contact Intesa today to find out how we can help you navigate European e-invoicing with ease and ensure compliance with international regulations.

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Discover the solutions for your company’s digital transformation:

• Electronic Archiving
• Customer Digital Onboarding
• EDI – Electronic Data Interchange
• Electronic Invoicing Platform
• International Electronic Invoicing
• Corporate Electronic Signature
• Document Management Software
• Supply Chain Management