Obligations related to the global minimum tax (Pillar 2) are gaining momentum again in 2026. Although the regulation is already known to companies, the upcoming deadlines and administrative requirements have in many cases not yet become routine for Hungarian group entities.

Notifications and returns

For taxpayers with a calendar financial year, the first important step is the notification related to the expected tax liability, the deadline of which is 28 February 2026, which may already be familiar from last year; however, the submission deadline has been extended by two months.

This is followed by the GLoBE  returns and advance payment obligations, which require not only technical administration but also preliminary data collection, group-level coordination, as well as local-level calculations:

• 30 June 2026: submission of the GLoBE return for the 2024 year (end of the 18th month following the tax year)
• 20 November 2026: submission of the GLoBE advance return for the 2025 year (20th day of the 11th month following the tax year)

Data collection challenges

The notification obligation itself does not depend on whether an actual top-up tax payment obligation arises; however, the intention to apply possible reliefs must already be indicated at this stage. Therefore, it is particularly important to clarify in time which entities fall within the scope of the regulation and who is responsible within the group for fulfilling the individual obligations. The notifications may require several types of information — particularly regarding parent and sister company obligations — the collection of which in practice may be more time-consuming than expected.

International background

The international regulatory environment continues to be refinedbased on OECD guidance and technical clarifications. These changes should also appear in the Hungarian legislation in the near future; therefore, up-to-date monitoring and early planning are increasingly key for companies.

Compliance with the global minimum tax is a process, not a one-off task

In relation to the global minimum tax, it is now clearly visible that compliance is not a one-time filing task but a continuously developing process. In the initial period, most companies focused on deadlines; the next step, however, is rather to ensure that group-level data, decisions and responsibilities are established in a stable manner.

Based on experience, the highest risk is not the lack of knowledge of the legislation, but when the necessary information only starts to come together close to the deadlines. Those who begin structured preparation in time can not only simplify administration but also significantly reduce the uncertainty of later accounting and tax decisions.