Jersey and Guernsey Adopt Global Minimum Tax Rules

Jersey's States Assembly unanimously adopted legislation on October 22, 2024, to implement an Income Inclusion Rule and a 15% Multinational Corporate Income Tax[5][22][23]. Concurrently, Guernsey implemented the OECD's Pillar Two global minimum tax rules, including a Multinational Top-up Tax, effective January 1, 2025[1][2]. Charles Parkinson, Guernsey's Treasury lead, stated fewer than 10 percent of multinational companies were relocating from the British Crown dependency due to the increased corporation tax[4].

These legislative actions by Jersey and Guernsey align with a global effort to ensure large multinational enterprises pay a minimum effective tax rate of 15% wherever they operate[10][18][20][21]. This shift impacts jurisdictions traditionally known for lower tax rates by targeting profit shifting and base erosion.

What the Records Show

The OECD's Pillar Two rules, also known as the global anti-base erosion rules, apply to multinational enterprise groups with annual consolidated revenues of €750 million or more[1][2][6][8][10][13][20]. Their primary objective is a minimum 15% effective tax rate for these large MNEs[1][9][10][11][13][18][19][20][21].

Guernsey's Multinational Top-up Tax (MTT) acts as an Income Inclusion Rule under the global rules[3][16]. A Guernsey-resident entity becomes liable for MTT if it is the Ultimate Parent Entity of an in-scope MNE Group or an Intermediated Parent Entity under certain conditions[3][16]. Most local entities in Guernsey will remain unaffected due to various thresholds and exclusions[1].

Jersey's adopted legislation includes both an Income Inclusion Rule (IIR) and a 15% Multinational Corporate Income Tax (MCIT) for in-scope entities[5][6][7][23]. The MCIT is structured as a "covered tax" for global rule purposes, ensuring Jersey profits contribute to the effective tax rate calculation[7]. Most Jersey entities will also not be affected, as the legislation targets large multinational groups[7]. Jersey confirmed it will not implement an Undertaxed Profits Rule at this time[6]. Both Jersey and Guernsey's new rules take effect for accounting periods beginning on or after January 1, 2025[1][2][5][6].

What Changed

Large multinational groups in Guernsey and Jersey now face a minimum 15% effective tax rate[1][5][9]. Guernsey's Treasury lead, Charles Parkinson, reported that fewer than 10 percent of multinational companies had relocated from the island due to these tax increases[4]. The States of Guernsey estimates a baseline of £93 million in Pillar Two receipts, though a discount rate is applied for future uncertainty[15].

What We Could Not Confirm

PrimaryBrief could not confirm the exact number of companies that have relocated from Guernsey. We also could not confirm the specific financial impacts on individual companies operating in either Guernsey or Jersey. The precise number of companies within either jurisdiction that meet the €750 million revenue threshold remains unconfirmed.