What is the Domestic Minimum Top-up Tax (DMT Tax)?
Mauritius has implemented a Domestic Minimum Top-up Tax (DMT) to align with global minimum tax rules. It applies to resident companies forming part of an in-scope Multinational Enterprise (MNE) group whose fiscal year ends on or after 1 January 2025. (mra.mu)
Key Compliance Items
| Topic | What You Must Do |
|---|---|
| Register / Determine Scope | If your Mauritius company is part of an MNE group, check consolidated global revenue thresholds under the OECD-Pillar Two model rules, particularly if you have high profit entities. |
| Returns & Payments | File the DMT tax return and pay any tax due no later than 15 months after the end of your fiscal year. If your year ends between 1 April and 29 June 2026, the deadline was extended to 30 June 2026 for both filing and payment. (mra.mu) |
| Deadline Extensions | MRA has issued a communiqué on 28 August 2026 extending the deadline for certain submissions for returns and payments of the DMT tax. (mra.mu) |
Practical Example
Imagine you are the Finance Director of “Mauritius Tech Holdings”, part of a multinational group headquartered in Europe. If your local fiscal year ends 30 June 2026:
- Your DMT return and any payment would usually be due by 15 months after 30 June 2026, i.e., by 30 September 2027 under the law. However, for certain periods earlier, the deadline was extended to 30 June 2026. Confirm if you fall into that category. (mra.mu)
- You must check whether other group members elect to use Qualified Domestic Minimum Top-up Tax, which can allow MCA (multinational) entities to avoid paying foreign-top-up tax if domestic top-up is sufficient. Mauritius requires alignment to OECD rules. |
Impact on Multinationals
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Increased tax cost: If your effective tax rate in Mauritius plus any Qualified Domestic Top-up fails to meet OECD GloBE minimum (commonly ~15%), you may face additional foreign top-up tax in other jurisdictions. |
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Reporting burden: Detailed information about financials, profits, foreign related parties, and intercompany transactions will need to be submitted. Accounting systems must support generating GloBE-compliant reports. |
Actionable Tips for Smooth Compliance
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Conduct a preliminary gap analysis: Compare current effective tax rate in Mauritius to global minimum threshold under GloBE. |
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Review your accounting period as Mauritius law references those ending on or after 1 January 2025; transitional periods may affect you. |
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Register for the new tax regime with MRA and track deadlines—note Mauritius has been extending certain deadlines where necessary. (mra.mu) |
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Keep detailed records of foreign income, tax paid abroad, and local deductions — key for credits and avoiding double taxation. |
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Use advisory or legal support to align with OECD and domestic law interpretations (especially where ambiguity exists in definitions or thresholds). |
Why It Matters
The DMT tax reflects a trend across Africa and globally: integrating domestic laws with global tax reform (OECD Pillar Two). For multinationals, the compliance cost and risk of exposure to top-up taxes offshore make this non-optional. Proper setup can control costs and avoid surprises.
Conclusion: If your Mauritius group entity is in scope, don’t wait. Begin compliance planning, ensure your financials support the requirements, and respect the deadlines—even when extensions are declared.