The distinction starts with the buyer
B2B invoicing is between businesses. B2G invoicing is from a business to a government or public-sector buyer. Both can involve structured data, validation and system-to-system exchange, but the legal scope and buyer instructions may differ. The term “e-invoicing mandate” is incomplete unless it identifies the transaction, parties, jurisdiction and effective rules.
How do the contexts differ?
This table is a research framework, not a statement that every B2B or B2G transaction follows one model.
| Question | B2B | B2G |
|---|---|---|
| Recipient | A private business. | A public contracting authority or other government buyer. |
| Where to check requirements | National law, tax authority guidance and buyer contract or specification. | Procurement law, public buyer portal and applicable national implementation. |
| Exchange route | Agreed partner channel, provider, network or mandated system. | The channel specified by the public buyer or applicable rules. |
| Related processes | Accounts payable, tax reporting and partner onboarding may be separate. | Procurement references, public buyer validation and payment workflow may also matter. |
What does the EU public procurement framework say?
Directive 2014/55/EU concerns electronic invoicing in public procurement. The European Commission explains that public authorities must be able to receive and process invoices compliant with the European standard for contracts within the Directive's scope. This receiver obligation is not the same as a universal requirement for every EU supplier to issue an e-invoice on every sale. National implementation and buyer instructions still need review.
EN 16931 addresses core invoice meaning and supported syntax bindings. It does not, by itself, specify one network for every transaction. See EN 16931 explained for the layers.
Is B2B e-invoicing mandatory everywhere?
No single answer covers every country, transaction and date. Some jurisdictions have domestic B2B measures, others have different scopes or phased rollouts. Tax reporting may be related but is not identical to exchanging an invoice with a buyer. EU VAT in the Digital Age measures also have phased timing and should not be confused with a current national requirement.
Use the relevant authority's current law and implementation guidance. The jurisdiction research page explains what to record instead of presenting an unverified global deadline list.
A five-question scope check
Record the official source and its update date beside the answer. If a buyer's technical instruction differs from a general article, clarify with that buyer and obtain qualified advice for legal interpretation.
- Who are the legal seller and buyer, and where are they established?
- Is this B2B, B2G or another transaction type?
- What is the transaction date and which rules are effective then?
- Is the requirement to issue, receive, exchange, report or retain data?
- Which format, route, identifiers and exceptions apply to this transaction?
What should an implementation team do next?
Segment partners by context and rule set before choosing one technical route. Test a representative invoice with each major buyer group, including acknowledgements and rejections. The ERP integration checklist translates that research into data, interface and operations work. Avoid using the presence of a PDF, portal or Peppol connection alone as proof of legal compliance.
Related guides
- EN 16931: a starting point — What the European e-invoicing semantic model covers, how syntax differs and where local rules begin.
- What is electronic invoicing? — How a structured e-invoice differs from a digital document and what happens between sender and recipient.
- ERP integration checklist — A phased checklist for connecting e-invoice data, exchange routes and finance operations.
Primary sources and further reading
These official resources support the standards and regulatory context. Check their current versions before implementation.
- European Commission: eInvoicing in public procurement ↗ — Public procurement scope and receiver obligations
- European Commission: European legislation on eInvoicing ↗ — Directive 2014/55/EU and the European standard
- European Commission: eInvoicing country factsheets ↗ — Country-level research starting point
- European Commission: VAT in the Digital Age ↗ — EU VAT reform and phased measures