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PDF invoice vs e-invoice: what is the difference?
Updated: 1 November 2026 · Klik&Shop
Many business owners think an invoice they email as a PDF is an e-invoice. In law and in practice it is not. The difference is structure: can software read the data without retyping it?
Two kinds of electronic invoice
- Plain electronic invoice: for example a PDF. It is a picture of an invoice. People can read it; software has to guess or retype the data.
- Structured e-invoice: a data file (usually UBL XML) in which every item has a fixed place: invoice number, VAT numbers, lines, VAT amounts. Software reads it without errors. When sent via Peppol it usually follows Peppol BIS Billing 3.0.
Comparison
| PDF invoice | E-invoice (UBL / Peppol) | |
|---|---|---|
| Readable by | People | Software (and people, with a viewer) |
| Processing | Retyping or OCR | Automatic |
| Checking | Manual | Automatic against fixed rules |
| Delivery | Peppol network, portal or email | |
| Belgium B2B (since 2026) | Not sufficient | Mandatory |
| Netherlands B2B (now) | Allowed if customer agrees | Allowed |
When can you still send a PDF?
Netherlands: between businesses a PDF is allowed if your customer agrees. Invoices to central government require an e-invoice. The government plans mandatory B2B e-invoicing from 1 July 2030 (Netherlands timeline).
Belgium: between Belgian VAT-registered businesses a structured e-invoice has been mandatory since 1 January 2026. A PDF may be added voluntarily but does not count as the mandatory invoice (Belgium mandate).
Consumers: in both countries you can still give consumers a PDF or paper invoice.
Is a UBL file with an embedded PDF a good idea?
Yes: UBL allows attachments. The UBL data is leading; the PDF is a readable copy. Make sure the amounts in the PDF match exactly.
From PDF to e-invoice
You don't need new software right away. With the web form you enter your invoice data and download a validated Peppol BIS 3 UBL invoice. For automation there is the API, and you can check a received or self-made file in the validator.
FAQ
Is a PDF invoice an e-invoice?
In everyday language sometimes, but legally and technically no: an e-invoice under the mandates is a structured file, such as UBL, that software can process automatically.
Can I convert a PDF to UBL?
Not reliably automatically. It is better to create the invoice again from your data as UBL, for example with a generator, and attach the PDF if you like.
Is an e-invoice a valid VAT invoice?
Yes, as long as all legally required invoice details are included. A structured e-invoice has the same legal value as a paper invoice.
Do I store e-invoices differently?
You keep the e-invoice itself (the XML file) for the statutory retention period. A readable rendering helps during audits.
Create or check a Peppol e-invoice yourself
Create 2 invoices for free with the web form, validate without limits in your browser, or automate with the API (5 free a month).
Not tax or legal advice. This article gives general information based on public sources (as of 1 November 2026). Rules can change; check your own situation with the tax authority (Belastingdienst, Belgian FPS Finance at efactuur.belgium.be) or your accountant.