Meet e-invoicing mandates from the output layer
A compliant e-invoice is generated from your ERP, converted to the right country format, validated, and delivered through the right channel. That whole process runs through the output layer. Interform helps you meet e-invoicing and e-reporting mandates across markets, from the systems you already run, with no change to your ERP.
E-invoicing has moved from policy to active law
Most European markets now mandate structured invoices. Each country sets its own formats, timelines, and transmission methods, and the same source data has to become a different document depending on where it is going.
Different countries require different formats and different deadlines.
The same invoice must become XRechnung, ZUGFeRD, Factur-X, Peppol BIS or a national format.
Mandates are already live or imminent: Italy, Belgium, Poland, France 2026, Germany 2027 to 2028.
ERP systems cover this unevenly, especially for on-premise, hybrid and IBM i setups.
A single rejected invoice can mean no payment, a regulatory breach, or a stalled supply chain.
E-invoicing is only the start. E-reporting and digital transport documents follow next.
E-invoicing mandates, country by country
15 pages on what each market requires, the four compliance models behind every mandate, and the eight things your systems have to do. Written for finance, IT and operations. All positions verified August 2026.
PDF, 15 pages, 0.6 MB. No form to fill in.
Mandate dates
Where e-invoicing is mandatory, and when
Each country sets its own format, its own platform and its own deadline.
Mandates also run outside Europe. Brazil and Mexico have cleared invoices for close to two decades, and obligations are spreading across Asia and the Middle East. This covers the markets Interform serves - if yours is missing, ask us.
Webinar
See what the mandates mean in practice
Pascal Hüben walks through which countries change when, the four compliance models behind every mandate, and what your systems have to be able to do.
Most vendors treat e-invoicing as a finance decision. It is an output problem. Output Management is what InterformNG2 does.
A compliant e-invoice is generated from ERP data, converted to a country format, validated, and delivered. Every one of those steps runs through the output layer, the same layer that already produces your invoices, labels and documents today.
Interform at the output layer
InterformNG2 takes the source data from your ERP, converts it to the format each country requires, validates the structure against the active rules, and delivers it through your existing process. No ERP changes. No new system to introduce.
What InterformNG2 handles
One output layer that turns any ERP's data into compliant invoices, across every market you trade in.
ERP-neutral by design
Connect to Infor, SAP, Microsoft Dynamics, IBM i and other systems from one output layer.
Country format library
XRechnung, ZUGFeRD, Factur-X, Peppol BIS, UBL, OIOUBL and more, built on the EN 16931 model.
Hybrid PDF and XML
Merge a human-readable PDF with the structured XML that carries the legally binding invoice.
Built-in validation
Check each invoice against format rules before it is sent, so fewer documents are rejected.
Flexible delivery
Peppol network, email, file deposit or print, with distribution available as an add-on.
Maintained as standards change
Format and rule updates ship with InterformNG2 as mandates and profiles evolve.
Compliant e-invoices from the system they already run
Auto Nagel, an automotive dealer group in Germany, runs on IBM i. The group is live with XRechnung and ZUGFeRD through InterformNG2, producing compliant e-invoices from the system it already runs, with no change to the ERP.
Read the full case study →Meet the mandate without a project per country
E-invoicing is the start, not the end
E-invoicing is the leading edge of a wider shift to structured, government-regulated documents. E-reporting, digital transport documents and real-time tax reporting are already following on the same networks. This is not only an EU story: other jurisdictions worldwide are introducing their own mandates, on their own timelines. The output layer that handles today's formats is the same one that will handle the next, so you set it up once instead of starting a new project for every market.
E-invoicing mandates: common questions
Short answers on deadlines, formats and what changes next. The full country timeline is above.
See all mandate datesWhen does e-invoicing become mandatory in Germany?
Since 01-01-2025, every business in Germany must be able to receive e-invoices in the EN 16931 format. From 01-01-2027, companies with a turnover above EUR 800,000 must also issue them. From 01-01-2028, the obligation covers all remaining B2B invoices.
When does the e-invoicing mandate start in France?
From 01-09-2026, every VAT-registered business established in France must be able to receive e-invoices, and large and mid-size companies must also issue them. From 01-09-2027, SMEs and micro companies must issue them too.
Which countries require B2B e-invoicing in 2026?
Italy has required B2B e-invoicing through SdI since 2019. In 2026 the obligation reaches Belgium, Croatia and Latvia (01-01-2026), Denmark (01-2026, certified digital accounting system above DKK 300,000), Poland through KSeF (01-04-2026), Slovenia (01-06-2026), France (01-09-2026) and Greece through myDATA (01-10-2026).
Which e-invoicing mandates start in 2027?
Germany (issuing above EUR 800,000 turnover), Spain (large taxpayers above EUR 8M), Slovakia (all B2B via Peppol), Norway (issuing via EHF and Peppol) and Portugal (public sector invoices for all companies) from 01-01-2027. France extends issuing to SMEs and micro companies on 01-09-2027, and Estonia covers all domestic VAT-registered B2B in 2027.
Can we still send PDF invoices?
Not where a mandate applies. A mandate requires a structured invoice that the receiving system can read, such as Peppol BIS, XRechnung or FatturaPA. Hybrid formats such as ZUGFeRD and Factur-X combine a readable PDF with structured XML in one file. In Portugal, PDF invoices are accepted until 31-12-2026; from 01-01-2027 they need a qualified electronic signature.
What is ViDA, and when does it apply?
ViDA (VAT in the Digital Age) is the EU reform of VAT reporting. From 07-2030 it introduces near-real-time digital reporting for cross-border B2B transactions in every EU member state, based on structured e-invoices.
Meet every e-invoicing mandate from one output layer with InterformNG2
Talk to our team about the markets you trade in and the systems you run, or try the software to see how Interform fits your setup.