Advance Tax Payments – What you need to know

Overview

Belgian tax law provides with a (non-mandatory) tax prepayment system which enables Belgian companies and branches in a tax paying position to make quarterly tax prepayments during their financial year. These tax prepayments are calculated on the provisional profits, but the final settlement is based on the taxable profit of the financial year as reported in the corporate income tax return.

Below, we summarize the key rules and practical takeaways both for corporate income tax purposes as for Pillar Two purposes.
 

Tax increase for insufficient tax prepayments

If no or insufficient tax prepayments are made, the corporate income tax due will be increased with a non-tax-deductible surcharge. For tax year 2027, financial years starting as of 1 January 2026, the surcharge amounts to 6,75%.

Based on the fact that each prepayment will provide the company with a so-called tax credit which can be deducted from the overall surcharge, the aforementioned surcharge can be reduced by making timely corporate income tax prepayments on a quarterly basis.
 

Ultimate dates of payment and credit percentages

For financial years ending per 31 December 2026 (i.e. when financial year coincides with the calendar year, respectively in cases where the financial year consists of more than 12 months and where the financial year ends per 31 December), the following due dates and credit percentages are applicable. 

It should be noted that the tax prepayment dates will differ from the above in case a change in financial year occurred or in case the financial year deviates from the calendar year.
 

Pillar Two tax prepayments

General

Multinational enterprise (MNE) groups and large domestic groups that are subject to the Pillar Two global minimum tax and that are required to pay a domestic top‑up tax (QDMTT) and/or an Income Inclusion Rule (IIR) top‑up tax may make advance payments in order to avoid tax surcharges.

Advance payments must be made via the digital platform MyMinFin (Pillar Two module) or by transfer to specific bank accounts, depending on whether the payment relates to the QDMTT or to the IIR. From a timing perspective, the standard corporate income tax advance payment deadlines apply equally to Pillar Two advance payments. Taxpayers should however ensure that payments are credited to the resp. bank accounts by the relevant deadline, bearing in mind banking processing times.
 

New payment and reference requirements for Pillar Two IIR advance payments as from 2026

Earlier this year, the Belgian tax authorities announced a procedural update affecting advance payments of the IIR top‑up tax under the Pillar Two minimum tax framework.

As from tax year 2026, a revised approach applies to the structured payment references for advance payments made by MNE groups and large domestic groups subject to the Belgian IIR. Under this new approach, IIR top-up tax advance payments must be made by each entity having taxing rights. Such Belgian taxpayer wishing to make an IIR advance payment will be required to use a structured communication generated at the level of the individual entity, either via MyMinfin or through the dedicated tool made available by the Belgian tax authorities. This change applies exclusively to IIR top-up tax advance payments; the existing procedure for advance payments relating to the domestic top‑up tax (QDMTT) remains unchanged.
 

Recapture of bank accounts’ information

Bank account and structured reference vary depending on the type of prepayment. We hereafter summarize these for reference purposes:

• The advance tax payments related to IIR top-up taxes must be made to the bank account number BE68 6792 0023 0834 (Inningscentrum – VA Pijler 2- IIR-bijheffing, Koning Albert II-laan 33, 1030 Brussel), making use of the following BIC: GEBABEBB. Furthermore, the entity level structured reference number must be added.
  
  
• The advance tax payments related to QDMTT top-up taxes must be made to the bank account number BE79 6792 0023 0733 (Inningscentrum – VA Pijler 2- binnenlandse bijheffing, Koning Albert II-laan 33, 1030 Brussel), making use of the following BIC: GEBABEBB. Furthermore, the group structured reference number must be added.
  
  
• As a reminder, the ordinary corporate income tax advance payments must be made to the bank account number BE61 6792 0022 9117 (Inningscentrum – Dienst voorafbetalingen’, Koning Albert II-laan 33, 1030 Brussel), making use of the following BIC: GEBABEBB. Furthermore, the entity level structured reference number must be added.
   

In case you need any assistance with the advance payments or more in general with your obligations under the Belgian Pillar Two legislation, please do not hesitate to reach out to us or your dedicated person of contact.