Key takeaways
- A non-compliant VAT invoice exposes you to two families of fines: proportional (a multiple of the tax) and non-proportional (a fixed amount per breach).
- Article 70, § 2 of the VAT Code sets a fine equal to twice the tax due, with a minimum of 50 euros per irregular invoice.
- Purely formal breaches fall under the fixed scale of Royal Decree No. 44, capped at 5,000 euros per breach.
- Fraudulent intent tips the case into the criminal sanctions of article 73: imprisonment and a heavy criminal fine, raised by the new Penal Code in force since 1 September 2026.
For VAT purposes, an invoice is not a mere receipt: it is a regulated document whose form binds the business. Non-compliant VAT invoicing in Belgium — a missing invoice, a wrong detail, an incorrect rate — is therefore not a harmless slip: it opens the door to a fine. The baseline rule sits in article 70, § 2 of the VAT Code, which provides for a fine of up to twice the tax due, with a minimum of 50 euros per invoice.
The stakes grow with the B2B e-invoicing obligation that took effect on 1 January 2026: compliance now also turns on the format. This article sets out the VAT fines for a non-compliant invoice, their legal basis, their amounts, and how the administration scales them.
Two families of VAT fines
The VAT Code draws a line between two kinds of administrative fine, depending on whether the breach affects the amount of tax. Grasping the distinction keeps a calculation error from being confused with a simple missing detail.
A proportional fine is calculated as a percentage of the VAT concerned: it targets breaches that bear directly on the tax due or deducted. A non-proportional fine is a fixed amount per breach, independent of the tax amount: it strikes formal breaches, such as the absence of a mandatory detail.
Proportional fines: a multiple of the tax
This is the heaviest sanction, because its size tracks the VAT at stake. Article 70, § 2 of the VAT Code targets the invoice specifically: where an invoice is not issued, or where the details on the parties' identification number, name or address, the nature or quantity of the goods or services, the price or its accessories are inaccurate, the fine is equal to twice the tax due on the transaction, with a minimum of 50 euros.
The same mechanism reaches beyond the invoice: article 70, § 1 penalises the non-payment or late payment of the tax with a fine equal to twice the tax evaded. The logic is constant: the higher the VAT at stake, the higher the potential fine.
the tax due
maximum proportional fine (art. 70, § 2)
minimum per invoice
floor of the proportional fine
cap per breach
non-proportional fine (RD No. 44)
Non-proportional fines: the fixed scale
Where the breach is purely formal and has no bearing on the tax due, the VAT Code provides for a non-proportional fine of 50 to 5,000 euros per breach (article 70, § 4), the precise amount of which is set by Royal Decree No. 44 of 9 July 2012 according to the nature of the breach and its repetition. The scale rises with each new breach of the same kind.
That ceiling is the legal maximum. Article 2 of Royal Decree No. 44 provides that, where the breach is committed with intent to evade the tax, the highest fine provided for is doubled, without exceeding 5,000 euros per breach.
| Proportional fine | Non-proportional fine | |
|---|---|---|
| Calculated as a percentage of the VAT | ||
| Fixed amount per breach | ||
| Legal basis | Art. 70 VAT Code | RD No. 44 of 9 July 2012 |
| Targets errors affecting the tax due | ||
| Targets formal breaches |
When an error becomes fraud: criminal sanctions
Beyond the administrative fine, non-compliant invoicing can fall under criminal law, but on a strict condition: fraudulent intent. Article 73 of the VAT Code punishes anyone who, with intent to defraud or to cause harm, breaches the provisions of the Code or its implementing decrees with imprisonment and a heavy criminal fine. The level of these penalties was raised by the new Penal Code, in force since 1 September 2026.
False invoices and fictitious invoicing circuits typically fall into this register. A good-faith error never does: the intentional element is at the heart of the criminal offence. That is the difference between a missing detail and organised fraud.
How the administration scales the fine
The amounts in the VAT Code are legal maximums, not automatic tariffs. FPS Finance applies reduction scales, in particular those of Royal Decree No. 41 of 30 January 1987, which bring the proportional fine well below twice the tax for a first non-fraudulent breach. Good faith, voluntary correction and a clean record all count in the taxpayer's favour.
What weighs on the amount of the fine
Intent
A good-faith error is reduced; intent to evade the tax removes the reduction and can double the fixed fine.
Repetition
The Royal Decree No. 44 scale rises with each new breach of the same kind.
Correction
Fixing the error voluntarily, for instance through a corrective invoice, is a mitigating factor.
Impact on the tax
A purely formal breach falls under the fixed fine; an error that understates VAT falls under the proportional one.
VAT-compliant invoices, without thinking about it
YouInv applies the mandatory details, the rates and the expected Peppol BIS format, to cut the risk of error at the source.
Avoiding the fine: compliance first
The best protection is still a correct invoice first time. The mandatory details of a Belgian invoice and a correct VAT rate cover most causes of a proportional fine. When a wrong invoice has already gone out, a corrective invoice lets you fix it before any audit.
Since 1 January 2026, compliance also covers the form of the document. The B2B e-invoicing obligation requires a structured e-invoice compliant with the EN 16931 standard, in the Peppol BIS format by default, for transactions between taxable persons established in Belgium: an invoice that does not use that channel also becomes a potential irregularity. Compliant software shifts the risk: it produces the right format and the right details with no manual step.
Further reading
- Mandatory details of a Belgian invoice: the list that drives compliance.
- The corrective invoice: fixing an invoice already issued.
- The legal framework of B2B e-invoicing: the obligation from 1 January 2026.
The authoritative source governs: the VAT Code published by FPS Finance.
What fine do you risk for a non-compliant VAT invoice in Belgium?
Article 70, § 2 of the VAT Code provides for a proportional fine equal to twice the tax due on the transaction, with a minimum of 50 euros, when an invoice is not issued or carries inaccurate details about the parties' identification, the nature, the quantity or the price. For purely formal breaches, a fixed fine set by Royal Decree No. 44 applies instead.
What is the difference between a proportional and a non-proportional fine?
A proportional fine is calculated as a percentage of the VAT at stake (up to twice the tax due under article 70 of the VAT Code). A non-proportional fine is a fixed amount per breach, set by Royal Decree No. 44 of 9 July 2012, which targets formal breaches with no direct impact on the tax due.
Does the administration always apply the maximum fine?
No. The amounts written into the VAT Code are legal ceilings. FPS Finance applies reduction scales, notably those of Royal Decree No. 41 of 30 January 1987, so a first good-faith error is in practice penalised well below the maximum. Intent to evade the tax, by contrast, removes the reduction.
Can a non-compliant invoice lead to criminal sanctions?
Yes, but only where there is fraudulent intent. Article 73 of the VAT Code punishes anyone who breaches the Code with intent to defraud with imprisonment and a heavy criminal fine, the level of which was raised by the new Penal Code in force since 1 September 2026. An involuntary error falls under administrative fines only.
Does mandatory e-invoicing change the risk of a fine?
It shifts it to the form. Since 1 January 2026, B2B transactions between taxable persons established in Belgium run through a structured e-invoice in the Peppol BIS format. An invoice that does not comply with that format, or is not sent through the required channel, becomes a breach that can be penalised like any other invoicing irregularity.
