01 · Mandates
Mandatory E-Invoicing in Europe: What Is Actually Obligatory
E-invoicing in Europe explained: the EU requirements and regulations, when e-invoicing becomes mandatory, and which national law actually obliges your business.
Mandatory e-invoicing in Europe
The invoice stopped being a document. It became a filing.
Independent analysis of mandatory e-invoicing in Europe: the national mandates and their dates, the EN 16931 model, the clearance networks, and what a finance function must change.
Start here
One anchor piece for each of the six sections. Each one links down to the analysis underneath it.
02 · Standards
EN 16931: The European Semantic Standard for the Core Invoice
EN 16931 explained: the European e-invoicing standard's semantic model, its two syntax bindings and its validation rules, and what it deliberately leaves open.
03 · Networks
Four Corners, Five Corners: The Two Architectures of European E-Invoicing
The four-corner and five-corner models are the two architectures of European e-invoicing. How each routes an invoice, who sees it first, and where each one fails.
04 · VAT reporting
VAT in the Digital Age: What the Digital Reporting Requirements Actually Change
The ViDA digital reporting requirements explained: what the VAT in the Digital Age directive changes for intra-Community trade, national regimes and the invoice.
05 · Compliance
Authenticity, Integrity and Legibility: The Three Properties an Invoice Must Keep
Authenticity of origin, integrity of content and legibility: what the VAT Directive requires of every invoice from issue to the end of retention, and how to prove it.
06 · Implementation
E-invoicing Readiness: The Assessment That Decides Everything After It
An e-invoicing readiness assessment worked in the order the answers bind: scope, documents, data, systems and the receiving side, ending in a defensible cost range.
The six sections
The obligation, the model, the network, the reporting, the evidence and the work.
01
Mandates and Deadlines
Who has to issue a structured invoice, from what date, to whom, and under which national law.
Open section 02Standards and Formats
The European semantic model, the two syntaxes that carry it, and the national profiles built on top.
Open section 03Networks and Transmission
Four corners, five corners and the platforms in between: how a document actually gets delivered.
Open section 04VAT and Digital Reporting
Where the invoice data goes after it is issued, and what the tax administration does with it.
Open section 05Integrity, Signatures and Archiving
Authenticity, integrity and legibility over a retention period measured in years, not months.
Open section 06Implementation and Operations
Master data, ERP readiness, supplier onboarding and the cost model that decides the approach.
Open sectionFrom the library
Analysis across all six sections, from national scope questions to what an exception queue looks like in week three.
01 · Mandates
Belgium's Structured Invoicing Obligation
Belgium's B2B e-invoicing mandate has applied since 1 January 2026: structured invoices between Belgian businesses over an existing network, with no state platform.
01 · Mandates
Croatia's Fiscalisation 2.0: eRačun Issuing, Receiving and Fiscalisation
Since 1 January 2026, VAT-registered Croatian businesses issue and receive eRačun and report each one to the Tax Administration. Who is in scope, the deadlines and 2027.
01 · Mandates
Derogations Under Article 395, and Why They Are Ending
For a decade, a Member State that wanted to mandate e-invoicing had to ask the Council for permission. That requirement shaped every national mandate in Europe, and it has now been removed.
01 · Mandates
Directive 2014/55/EU: The Mandate That Started With Public Procurement
The EU e-invoicing directive, 2014/55/EU, obliges public bodies to accept invoices built to EN 16931 but obliges no supplier to send one. What it requires, and from when.
01 · Mandates
France's E-Invoicing and E-Reporting Reform
France's e-invoicing reform applies from September 2026: licensed platforms carry the invoice, and a separate e-reporting duty catches what invoicing does not.
01 · Mandates
Germany's B2B E-Invoicing Mandate, Stage by Stage
Germany's B2B e-invoicing mandate: every business has had to receive structured invoices since 2025, issuing follows in stages to 2028, and there is no central platform.
01 · Mandates
Greece's B2B E-Invoicing Mandate: the Second Period from 2 November 2026
Greek businesses with 2023 revenue up to €1m must e-invoice from 2 November 2026, with a transition to 31 January 2027. What changes, and the route through myDATA.
01 · Mandates
Italy's SdI: What a Decade of Clearance Looks Like
Italy's SdI exchange system has cleared domestic B2B invoices longer than any system in Europe. How it works, what an SdI code is, and what is still difficult.
What this publication is
Sourced to the text, not to a vendor's summary of the text.
Writes and edits The Clearance Model. Background in administration and finance: reading primary legislation and published technical specifications directly, and modelling what a compliance obligation costs to meet.