| Status | Enacted Law |
| Law | Finance Act 2025, issued on August 8, 2025 |
| Effective Date | Years of assessment commencing on or after July 1, 2025 (fiscal years ending on or after January 1, 2025) |
| IIR | No |
| UTPR | No |
| QDMTT | Yes |
| Filing Deadlines | Standard |
| Safe Harbours | No |
A Communique of October 29, 2025 issued by the MRA provides that:
– The QDMTT applies to a resident company forming part of an in-scope multinational enterprise group with a fiscal year ending on or after 1 January 2025
– The deadlines for QDMTT notifications that are already due, have been extended to 30 November 2025
– The online portal for making a QDMTT notification is now open.
The Finance Act 2025, enacted on August 8, 2025, includes a QDMTT from July 1, 2025.
OVERVIEW
The Finance Act 2025, enacted on August 8, 2025, introduces a new Sub-Part AF to the Income Tax Act to include a domestic minimum top-up tax (intended to be a QDMTT) for years of assessment commencing on or after July 1, 2025. The Communique of October 29, 2025 clarifies that the QDMTT applies to a resident company forming part of an in-scope multinational enterprise group (MNE) with a fiscal year ending on or after January 1, 2025.
The Income Inclusion Rule (IIR) and Under-Taxed Profits Rule (UTPR) are not included.
GLOBE APPLICATION
General
The Finance Act, 2025 provides for a high-level introduction of a QDMTT. As such it includes the key provisions of the OECD Model Rules but the detailed adjustments are not yet provided.
As such, the law provides for:
-Scope of the QDMTT;
-Key definitions from the Model Rules, including consolidated financial statements, excluded entities, government entities, investment entities, permanent establishments ;
-Provisions for mergers/demergers;
-GloBE ETR calculation;
-Administrative provisions.
Key aspects of the Model GloBE Rules are, however, not included including GloBE income adjustments, definitions for the International Shipping exemption, adjusted Covered Taxes adjustments and the calculation of the Substance-Based Income Exclusion.
Administrative Guidance
Only limited aspects of the OECD Administrative Guidance are included in the law (relating to the QDMTT pushdown adjustments).
Safe Harbour and Penalty Relief Guidance
The OECD Safe Harbours are not included in the law.
ELECTIONS
Elections in the OECD Model Rules
No elections from the OECD Model Rules are included in the law.
Elections in the Administrative Guidance
No elections from the OECD Administrative Guidance are included in the law.
DEVIATIONS FROM THE OECD MODEL RULES/EU GLOBAL MINIMUM TAX DIRECTIVE
As the law only provides for a high-level QDMTT there are significant differences from the OECD Model Rules. Aside from the IIR and UTPR aspects not being addressed, few of the detailed GloBE adjustments for GloBE Income/Adjusted Covered Taxes are included, and the law does not include any GloBE Elections. Further details are expected to be provided in Regulations.
DOMESTIC MINIMUM TAX
General
The Finance Act 2025, enacted on August 8, 2025, introduces a new Sub-Part AF to the Income Tax Act to include a domestic minimum top-up tax (intended to be a QDMTT) for years of assessment commencing on or after July 1, 2025. The Communique of October 29, 2025 clarifies that the QDMTT applies to a resident company forming part of an in-scope multinational enterprise group (MNE) with a fiscal year ending on or after January 1, 2025.
QDMTT Design Features
Key design features of the QDMTT include:
Accounting Standard
GloBE income for QDMTT purposes is based on the default GloBE rules. As such the financial accounting net income or loss is the net income or loss determined for an entity, prior to any consolidation adjustments in preparing the consolidated financial statements of the ultimate parent entity. There are no provisions in the law for the use of a local accounting standard.
No Pushdown/PE Adjustments
Tax paid or incurred by a Constituent Entity-owner under a CFC Tax Regime that is pushed down to a domestic Constituent Entity in the GloBE Rules must be excluded, as provided in the OECD Administrative Guidance. This is included in Section 50P of the Law.
This preserves Mauritius’s primary right to tax income accruing to a Mauritius member entity which is also a CFC. If there were no statutory derogation from the general GloBE rules for the calculation of the domestic minimum tax, and the CFC tax paid by the controlling company abroad were included in the included taxes of the Mauritius CFC, the effective tax rate would be increased. Therefore, excluding the CFC tax from the Mauritius CFCs covered taxes allows Mauritius to tax low-taxed income at a higher rate than would be the case under an IIR.
Section 50P also prevents the pushdown of tax to hybrids, PEs and for taxes on distributions (aside from Mauritius withholding tax).
Investment Entities
Section 50V of the law applies the QDMTT to investment entities.
Registration
Section 50W(1) of the law provides that in-scope constituent entities is required to notify to the tax authority the designated person resident in Mauritius responsible for filing the QDMTT tax return. This must be provided within 6 months from the end of the fiscal year. The October 2025 Communique provides that the deadlines for notifications that are already due, have been extended to November 30, 2025.
Filing
Section 50W(3) of the law provides that the designated person is required to file the QDMTT tax return not later than 15 months from the end of the fiscal year.
If a designated filing entity is not appointed, each constituent entity is required to file a QDMTT tax return.
Payment
Payment of any QDMTT is required by the deadline for filing the QDMTT return.
Every constituent entity required to file the QDMTT tax return is required to pay the QDMTT based on the following formula:
Total QDMTT amount x (GloBE income of each covered person / Total GloBE income of all covered persons)
Penalties
Under Section 50X of the law where a designated filing entity or constituent entity fails to pay the amount of tax required by the payment date they are liable to a penalty of 5 per cent of the amount of the tax remaining unpaid.
In addition, interest is levied at a rate of 0.25 per cent per month or part of the month during which the QDMTT tax remains unpaid.
Section 50W(1) of the law provides that in-scope constituent entities are required to notify to the tax authority the designated person resident in Mauritius responsible for filing the QDMTT tax return. This must be provided within 6 months from the end of the MNE group’s fiscal year. The October 2025 Communique provides that the deadlines for notifications that are already due, have been extended to November 30, 2025.
The October 29, 2025 Communique announced the opening of the QDMTT notification portal.
The Notification is made online and a username and password is required. This is either via Taxpayer Login or the e-filing centre.
No
See ‘Domestic Rules’
No
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