E-invoicing: what UBL and Peppol mean for your invoices
Written by Ilias Aarrass5 min read · Published on · Last reviewed on 
In short
A PDF is not an e-invoice: central government already requires a real one, and the Dutch government wants e-invoicing to be mandatory for domestic business invoices from 1 July 2030.
- Digital reporting on those invoices would become mandatory from 1 July 2031; businesses under the small business scheme are exempt.
- The draft bill first goes to public consultation, so the domestic obligation is not yet settled.
- An e-invoice is a structured file, usually in UBL format, delivered straight into your client's system over the Peppol network.
- Between businesses e-invoicing is not mandatory yet: a PDF remains a valid invoice as long as your client agrees to electronic delivery.
Nearly every freelancer emails invoices as a PDF and considers that digital invoicing. For tax purposes that is fine, but it is not an e-invoice. A real e-invoice is a file your client's computer can read and post by itself, without anyone retyping amounts. Anyone working for government bodies knows this already: there it is mandatory. And Europe is preparing legislation that will make e-invoicing far more widely compulsory in the coming years. This article explains what an e-invoice is, where it is already required, what is coming and which step you can take today at no cost.
PDF, UBL and Peppol: the difference in one paragraph
A PDF is a picture of an invoice: fine for a human, useless to an accounting system. An e-invoice is a structured file, usually in the UBL format, in which every detail has its own field: invoice number, date, VAT rate, amount, your registration and VAT numbers. Peppol is not the format but the network over which those files are exchanged securely, comparable to how email works: you and your client each have an address and a provider, and the file lands straight in the recipient's system.
| Form | Readable by | Valid for tax |
|---|---|---|
| PDF by email | Humans only | Yes |
| PDF with UBL attachment | Humans and software | Yes |
| UBL over Peppol | Software, with a view at the recipient | Yes, and mandatory for government |
Where it is already required
If you supply central government, e-invoicing has been mandatory for years: a PDF by email is not processed there. Many municipalities, provinces, water authorities, hospitals and educational institutions likewise accept only e-invoices, often over Peppol. If you freelance in healthcare, education or as a subcontractor in construction for a contracting authority, chances are you have met this already. The practical consequence: no e-invoice, no payment, and therefore needlessly long payment terms.
Between businesses, e-invoicing is not yet mandatory in the Netherlands. Larger clients do increasingly ask for it, simply because it removes manual work from their accounts payable. That makes it a commercial argument for you too: whoever can attach a UBL gets paid faster and with less friction.
What is coming: ViDA
At European level the VAT in the Digital Age (ViDA) package has been adopted. Two things matter. First, since 2025 member states may impose domestic e-invoicing themselves without first asking Brussels, and several neighbouring countries already do. Second, from 1 July 2030 a European obligation applies to e-invoicing and digital reporting on cross-border supplies within the EU. In September 2026 the Netherlands announced it will follow suit: the government wants e-invoicing from 1 July 2030 and digital reporting from 1 July 2031 to be mandatory for domestic business-to-business transactions as well, with an exception for businesses under the small business scheme. The draft bill first goes to public consultation, so it is not yet final.
For most freelancers that is still distant, but it is a real signal: the PDF will eventually stop being the standard. If you already invoice clients abroad, keep an eye on that country's rules; some member states run years ahead of the European schedule and already demand a specific format.
What to arrange now
The step is smaller than the terminology suggests. What matters most is that your invoice details are complete and consistent, because an e-invoice is rejected the moment a required field is missing. Think of your VAT number, your registration number, a unique invoice number in a continuous series, the correct VAT rate per line and, for government, the purchase order number your client gives you.
- In your invoicing software, switch on the option to attach a UBL file alongside the PDF.
- For government assignments always ask for the purchase order number and the preferred channel before invoicing.
- Check whether your package can send over Peppol; if so, request your Peppol address from your supplier.
- Ask suppliers for incoming invoices as UBL too: that saves you retyping their details.
- Store the e-invoice in the format in which you sent it; the seven-year retention obligation applies in full.
Frequently asked questions
Will a PDF invoice still be valid?
At present a PDF is a perfectly valid invoice for VAT, provided your client agrees to electronic delivery. That only changes once a legal obligation arrives, and then only for the transactions it covers. For government assignments a PDF is already not enough. What sending a PDF by email involves is covered in sending invoices by email.
Do I need to buy an expensive accounting package?
No. Attaching UBL is standard in nearly every invoicing package these days, including cheaper ones. Sending over Peppol needs a provider connection, usually included in your subscription or a few euros a month. See choosing accounting software.
My client rejects my invoice over a missing field. Now what?
With e-invoices the check is automated and therefore strict: one missing order number suffices. Do not send a reminder but correct the invoice and resend it under the same number if it has not been processed. If it was already posted, use a credit note.
Does this apply if I only invoice private customers?
For private customers e-invoicing plays no role; there a simplified invoice or till receipt often suffices. These developments mainly concern invoices between businesses and to public bodies.
Sources
- Dutch government opts to introduce e-invoicing and reporting for businessesRijksoverheid · rijksoverheid.nl
- E-invoicing to government bodiesbusiness.gov.nl · business.gov.nl
Sources checked on
This article provides general information based on the rules known for 2026 and does not replace personal tax advice. For your specific situation, we're happy to take a look with you.
