Global Minimum Tax In Hungary: Filing Deadline Approaches For The 2024 Tax Year

The Global Minimum Tax (GMT) regime has officially entered its first practical compliance phase in Hungary. After months of uncertainty and preparation, the Hungarian Tax Authority (NAV) has now released the long‑awaited filing form, marking a critical milestone for multinational groups subject to the rules.

With the publication of the extended reporting template, companies must now shift from planning to execution. For the 2024 tax year—the first year of application of the Global Minimum Tax in Hungary—the filing deadline is 30 June 2026, placing immediate pressure on in-scope groups to finalize calculations and ensure compliance.

Global Minimum Tax: From Theory to Mandatory Filing

Since the introduction of the Global Minimum Tax under the OECD Pillar Two framework, businesses have been preparing for a fundamentally new approach to corporate taxation. Hungary implemented the regime as of 1 January 2024, aligning with EU directives and global standards.

Initially, compliance obligations focused on registration and notification using the GLOBE forms (GLOBEA and GLOBEM). These forms allowed the tax authority to collect essential information about multinational enterprise (MNE) groups and their Hungarian entities.

However, the release of the extended 24GLBADO (or 24GLOBADO) form in 2026 represents a major step forward. It transforms the Global Minimum Tax from a conceptual framework into a concrete tax filing obligation, requiring detailed reporting of top‑up tax liabilities.

What the Global Minimum Tax Return Requires

The newly published form introduces a structured and comprehensive reporting requirement. Companies subject to the Global Minimum Tax in Hungary must now disclose:

• Identification data of Hungarian group entities and the ultimate parent company
• The amount of top‑up tax payable, including Qualified Domestic Minimum Top‑up Tax (QDMTT) and Income Inclusion Rule (IIR) elements
• The calculated Effective Tax Rate (ETR) under GloBE rules
• Details of advance payments already reported
• Key financial and accounting information relevant for Global Minimum Tax purposes

Importantly, the filing obligation applies even if no top‑up tax is ultimately due—for example, where safe harbour provisions are applied.

30 June 2026: A Key Global Minimum Tax Deadline

For the 2024 tax year, Hungary provides a transitional rule that extends the standard filing deadline. Instead of the typical 15‑month deadline, companies have 18 months to submit their Global Minimum Tax return.

For calendar-year taxpayers, this results in a firm filing and payment deadline of: 30 June 2026

This is the first actual Global Minimum Tax return filing deadline in Hungary, and it is expected to set the standard for future compliance cycles.

Why This Matters: Increased Complexity and Compliance Risk

The introduction of the Global Minimum Tax return is not a simple administrative exercise. It requires:

• Complex ETR calculations based on adjusted financial data
• Alignment between local accounting standards and group reporting frameworks (e.g. IFRS)
• Detailed data collection across multiple jurisdictions
• Assessment of safe harbour eligibility and supporting documentation

As a result, many companies are facing significant challenges in translating theoretical models into practical, audit‑ready filings.

Global Minimum Tax and International Reporting Alignment

The Hungarian reporting framework is not developing in isolation. The structure of the new form reflects broader international trends, particularly:

• The OECD GloBE Information Return (GIR)
• The EU DAC9 reporting requirements

This alignment signals that the Global Minimum Tax will increasingly rely on standardized, cross-border data reporting. Companies should expect further integration between domestic filings and global reporting obligations in the coming years.

Next Steps for Businesses

With the Global Minimum Tax filing deadline rapidly approaching, affected groups should act without delay. Key action points include:

• Reviewing and validating preliminary Global Minimum Tax calculations
• Ensuring consistency between financial statements and GloBE requirements
• Confirming reporting responsibilities (including designated filing entities)
• Preparing the data required for the 24GLBADO / 24GLOBADO form
• Establishing internal documentation to support tax positions

Early action is essential not only for timely filing but also for minimizing risk in potential tax authority reviews.

Conclusion: A Turning Point for Global Minimum Tax Compliance

The release of the Hungarian Global Minimum Tax return form represents a defining moment in the implementation of Pillar Two rules. What was previously a strategic and technical discussion has now become a tangible compliance obligation with immediate deadlines.

As the first filing deadline on 30 June 2026 approaches, multinational groups must ensure they are fully prepared. This first year of reporting will not only test compliance systems but also shape how businesses manage Global Minimum Tax obligations in the future.

Need support with your Global Minimum Tax analysis or filing in Hungary? Now is the time to act—before the first real deadline becomes a missed opportunity.

The content of this article is intended to provide a general guide to the subject matter. Specialist advice should be sought about your specific circumstances.