The OECD has released an updated list of signatories to the Multilateral Competent Authority Agreement on the Exchange of Global Anti-Base Erosion (GloBE) Information Returns, showing 36 participating jurisdictions as of 29 May 2026.

The Organisation for Economic Co-operation and Development (OECD), on 29 May 2026, released an updated list of signatories to the Multilateral Competent Authority Agreement on the Exchange of Global Anti-Base Erosion (GloBE) Information Returns (GIR MCAA), including the respective dates of signature.

The agreement facilitates the automatic exchange of GloBE Information Returns between tax authorities and reduces compliance costs for multinational enterprise groups by enabling centralised filing through a single system.

The GloBE Information Return is a standardised filing comprising two parts: a General Section covering the multinational group’s corporate structure and a broad overview of how the GloBE Rules apply to it, and one or more Jurisdictional Sections setting out the detailed application of the GloBE Rules and, where relevant, the Qualified Domestic Minimum Top-up Tax in each jurisdiction where the group operates.

GIR MCAA signatories as of 29 May 2026

Jurisdiction Date Jurisdiction Date
Australia 28 Jan 2026 Austria 26 Jun 2025
Barbados 12 May 2026 Belgium 16 Jun 2025
Canada 6 Feb 2026 Croatia 24 Dec 2025
Cyprus 12 May 2026 Czechia 11 May 2026
Denmark 11 Jun 2025 Finland 30 Sep 2025
France 9 Jul 2025 Germany 19 Sep 2025
Gibraltar 14 Jan 2026 Greece 18 Mar 2026
Hong Kong, China 21 Apr 2026 Hungary 31 Oct 2025
Ireland 8 Jul 2025 Isle of Man 9 Apr 2026
Italy 30 Jun 2025 Japan 24 Jun 2025
Korea (rep.) 9 Jul 2025 Liechtenstein 29 Sep 2025
Luxembourg 26 Jun 2025 Netherlands 14 Aug 2025
New Zealand 8 Jul 2025 Norway 1 Sep 2025
Portugal 2 Jul 2025 Romania 9 Apr 2026
Singapore 14 Apr 2026 Slovak Republic 16 Jun 2025
Slovenia 22 Dec 2025 South Africa 2 Oct 2025
Spain 4 Jul 2025 Sweden 4 Nov 2025
Switzerland 28 Aug 2025 UK 1 Jul 2025

Earlier, the OECD published an updated list of signatories, including their signing dates, to the Multilateral Competent Authority Agreement on the Exchange of Global Anti-Base Erosion (GloBE) Information Returns (GIR MCAA) on 5 May 2026.