Germany vs Belgium B2B e-invoicing: two different paths to EU ViDA digital reporting compliance

As EU e-invoicing compliance accelerates, Germany and Belgium represent two distinct models for B2B e-invoicing. Both countries obtained early derogations, both plan to introduce digital reporting requirements, and both must align with ViDA by 2030.

However, the implementation of e-invoicing in Germany and Belgium differs significantly in terms of Peppol adoption, invoice formats (EN 16931 / UBL), validation, and rollout timelines.

Germany e-invoicing: flexible, multi-syntax, and phased mandate (2025–2028)

Germany deliberately chose an open, decentralised model.

eDelivery isn’t regulated, so email, EDI, and Peppol all coexist, with email still dominating in most scenarios. Multiple syntaxes are allowed, including XRechnung (via UBL/CII) and ZUGFeRD, enabling companies to reuse existing formats and EDI investments.

The mandate is phased. Invoice reception became mandatory in 2025, while sending obligations will only follow between 2027 and 2028. This gradual approach reduces immediate disruption and gives organisations time to adapt their systems and processes. However, the absence of a governed validation layer means invoice varies significantly. Compliance checks are often pushed downstream to buyers, who must resolve errors, incomplete data, or format inconsistencies.

In practice, this flexibility creates fragmentation. Different formats, channels, and maturity levels coexist, making standardisation, automation, and scalability more difficult, especially for companies operating across multiple partners or countries.

Belgium e-invoicing: Peppol-first model, UBL (EN 16931), and 2026 mandate

Belgium opted for a more structured and governed approach to B2B e-invoicing.

Peppol is the mandatory eDelivery channel, unless both parties explicitly agree otherwise, and UBL (EN 16931) is the single required syntax. Validation is enforced through the Peppol framework, meaning non-compliant invoices are rejected before they reach the buyer. The B2B mandate started in 2026, with suppliers responsible for ensuring compliance from day one.

This creates a more standardised and interoperable environment, improving data quality and enabling higher levels of automation. But it also exposes weaknesses much earlier.

On the business side, many organisations struggle with master data readiness and electronic addressing, which are critical for Peppol-based exchanges. Invoice content is often too minimal, missing key business data required for automation, matching, and reconciliation.

System landscapes also create friction. Some companies rely on separate Access Points for sending (operational platforms) and receiving invoices (finance applications), which complicates monitoring and end-to-end visibility, as feedback mechanisms relying on legacy life cycle status response (MLR) are not adapted to dual-vendor setups.

At the ecosystem level, challenges have emerged around the timing of SMP and certificate migrations. And key capabilities such as application response (MLS) are not yet deployed. This reduces transparency and makes invoice lifecycle tracking more complex.

In short, Belgium removes ambiguity but forces organisations and providers to be ready.

Germany vs Belgium e-invoicing: key differences

• eDelivery model: Germany allows multiple channels (email, EDI, Peppol), while Belgium prioritises Peppol as the default network
• Syntax: Germany supports multiple formats (XRechnung, ZUGFeRD), while Belgium enforces UBL (EN 16931)
• Validation: Germany has no central validation layer, while Belgium enforces validation through Peppol
• Timeline: Germany follows a phased rollout (2025–2028), while Belgium applies a 2026 mandate
• Complexity: Germany distributes complexity across participants, while Belgium concentrates it upfront

The takeaway for e-invoicing in Europe

Germany and Belgium illustrate two fundamentally different approaches to B2B e-invoicing.

Germany prioritises flexibility and gradual adoption. Multiple formats, channels, and timelines coexist, allowing companies to adapt at their own pace but leading to fragmentation, inconsistent invoice quality, and increased reliance on buyers to manage compliance. It is already said that e-mail will not be the foundation upon which ViDa DRR will be built.

Belgium, by contrast, enforces standardisation from the start. A single syntax (UBL / EN 16931), Peppol as the default delivery network, and built-in validation create a more controlled and interoperable environment. This requires stronger upfront readiness from suppliers and software platforms, preparing all ecosystems for a full digital process with ViDa DRR.

In essence, Germany distributes complexity over time and across participants, while Belgium concentrates it upfront and enforces it through the network. Both models are now converging toward a common destination with ViDA, real-time or near-real-time reporting, and increased control requirements across the EU. This reflects a broader shift toward standardisation, interoperability, and continuous transaction controls across Europe.

For organisations operating across Europe, the real challenge is not choosing one model over the other — but being able to support both simultaneously, across different countries, mandates, and levels of maturity.

See also: Axway is tracking e-invoicing regulations across the world

Axway can help you navigate e-invoicing

Axway helps organisations navigate different e-invoicing models across Europe with a single, standard-driven approach to B2B and B2G e-invoicing, Peppol connectivity, and upcoming digital reporting requirements. Whether operating in flexible environments like Germany or more regulated frameworks like Belgium, Axway enables companies to ensure compliance, improve data quality, and scale their e-invoicing processes across countries.