E-invoicing: 5 misconceptions that waste your time (and money)
Since electronic invoicing became mandatory in Belgium, we hear all sorts of contradictory information. Some of these misconceptions are harmless. Others could cost you a fine of €1,500. Let's debunk them, misconception by misconception.
Since the beginning of 2026, e-invoicing via PEPPOL is mandatory for all Belgian companies subject to VAT that invoice other businesses. Yet, a few months after the law took effect, many executives and freelancers are still operating with false information. Here are the five most common misconceptions we hear, and what is actually happening.
A PDF sent by email is already an electronic invoice
MYTH: I have been sending my invoices by email for years. So, this is already electronic invoicing. The obligation is fulfilled.
REALITY: A PDF is a dematerialized invoice, not an electronic invoice in the legal sense. The difference is not in form, it is in substance.
A PDF invoice is a document designed to be read by a human. Your client receives it, opens it, and manually enters the amounts into their software. A structured electronic invoice, on the other hand, is a file designed to be read directly by accounting software, without human intervention.
The format adopted in Belgium is Peppol BIS Billing 3.0, based on UBL 2.1. This file contains the same information as a traditional invoice but organized according to a standardized structure that all compatible software can read automatically.
Sending a PDF by email after January 1, 2026, to a Belgian client subject to VAT is sending an invoice that the VAT administration considers as not issued. Your client can legally refuse it. And you risk a fine as soon as the violation is detected.
I can still wait, the obligation is not really enforced.
MYTH: The authorities are not really going to check in the first few months. There is always an informal transition period. I'll see that later.
REALITY: The official grace period has been over since March 31, 2026. Fines have been applicable since April 1, 2026.
The Federal Public Service Finance did indeed announce on December 2, 2025, a grace period for the first quarter of 2026, under strict conditions: the company had to demonstrate that it had made reasonable efforts to comply and that the delay was beyond its control. This was not a general exemption for everyone.
This grace period ended on March 31, 2026. Since April 1, 2026, the Royal Decree of July 8, 2025, applies fully.The administration is not required to issue a warning before imposing a fine.A sanction can theoretically be applied as soon as the first detection of a violation.
Moreover, the risk does not only come from the administration. It also comes from your clients. A VAT-registered client who receives a PDF can legally refuse it and demand a compliant invoice before paying. This impacts your cash flow immediately, without waiting for a tax audit.
PEPPOL compliance generally takes a few hours in Odoo Enterprise. The longest part is entering the PEPPOL identifiers of your clients. But this can be done in bulk.
It is complicated and costly to implement.
MYTH: PEPPOL is an IT project. You need to change software, hire developers, invest several thousand euros. I don't have the resources for that.
REALITY: For most SMEs and freelancers, compliance takes a few hours and costs little or nothing. Your current software probably already integrates it.
If you are using a serious invoicing software updated since 2025, PEPPOL is almost certainly available in your current version. In Odoo Enterprise, for example, PEPPOL access is included in the license, with no additional fees and no volume limits. Activation: a few clicks in the accounting settings.
If your software does not yet support PEPPOL natively, there are separate access point solutions (Billit, Falco, Peppol Box) that connect to your existing system via files or an API. Some are free for limited use.
The time-consuming part is not technical: it is entering the PEPPOL identifiers of all your clients. But this can also be done in bulk via an Excel import in most software. It is not a project, it is an administrative task.
My accountant is taking care of it, it's not my problem
MYTH: Electronic invoicing is an accounting issue. My accountant will handle it. I don't have to worry about it.
REALITY: The obligation concerns your business, not your accountant. You are the one who must issue your invoices via PEPPOL, not him.
Your accountant or fiduciary can assist you in achieving compliance and advise you on the choice of solution. But it is your business that issues the invoices, and therefore it is your business that must be connected to the PEPPOL network to transmit them correctly.
The confusion arises from the fact that some fiduciaries use tools like Horus Office or Exact Online that are themselves PEPPOL compatible. In this case, it is often the fiduciary who manages the technical part of the connection. But even in this case, you need to check with him that your invoice issuance workflow is compliant, and not just the reception on the fiduciary's side.
In case of a fine, it is your business number that is penalized, not your accountant's.This is a good reason to check directly with him where you stand, rather than assuming everything is in order.
Checking that your main clients are registered on PEPPOL takes less time than you think. Most software indicates if a client is findable before sending.
It doesn't change anything in my daily life, it's just an administrative obligation
MYTH: I will activate PEPPOL because I have to, but in the end it won't change anything. It's just a box to check.
REALITY: For those who play the game, e-invoicing actually reduces the time spent on billing, both on the issuance side and especially on the reception side.
The obligation is binding, that is undeniable. But it has a side effect that many leaders discover with surprise: when their suppliers finally send compliant invoices via PEPPOL, these invoices are automatically imported into the accounting software. No one copies the amounts by hand anymore. No one searches for the PDF in the email inbox. Bank reconciliation becomes faster.
This is particularly visible for companies that receive many purchase invoices each month. A few dozen invoices processed automatically instead of manually means several hours saved each month on tasks with no added value.
Some also see an improvement on the payment side. Customers who receive a structured invoice in their software can validate it and initiate payment without any additional manipulation. The time between issuance and payment can mechanically shorten.
E-invoicing has been presented as a constraint. For those who have really implemented it, it often becomes a real time saver by the second month.
What you need to take away from all this
Structured electronic invoicing via PEPPOL has been mandatory since January 1, 2026, for B2B transactions between Belgian companies subject to VAT. The grace period is over. Fines are in effect. And compliance is much simpler than many think.
If you have not yet activated PEPPOL, the question is no longer "should I do it" but "how much longer am I risking a fine and invoices being rejected by my clients". The best answer to this question is: the sooner the better.
If you are using Odoo Enterprise and have not yet configured PEPPOL, please contact us. This is a setup that we systematically do on all our Belgian projects, and it can be resolved quickly.
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