Portugal

Today deadline for delivery of the global minimum IRC declaration

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Briefings

Portuguese multinational companies must submit their Global Minimum Tax (GTM) declaration by September 30, 2026, extending the deadline from June 30. This applies to large groups with fiscal years ending between December 2024 and March 2025, covering entities generating 750 million euros or more in worldwide income. The extension was granted by the Portuguese government to facilitate coordinated multinational reporting and minimize errors, utilizing OECD's internal dispute resolution mechanisms. Netjets, the only known qualifying US multinational with a Portuguese operation exceeding this threshold, is subject to the 15% global minimum tax rate.

Key points

• The Portuguese government extended the deadline for Global Minimum Tax (GTM) declarations from June 30 to September 30, 2026, applying to large multinational groups with fiscal years ending between December 2024 and March 2025.
• The GTM regime requires entities generating 750 million euros or more in worldwide income to file a declaration annually with the AT, with Netjets identified as the sole known qualifying US multinational with a Portuguese operation exceeding this threshold.

Context and limitations

Coverage is limited to the specific GTM declaration deadline extension; other related information such as the GIR (Global Information Return) model, specific penalties, or future tax adjustments remains unreported.

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