Global Minimum Tax South Africa: What MNEs Must Do Before 16 March 2026

Global Minimum Tax Registration Opens on SARS eFiling on 16 March 2026

If your business belongs to a multinational enterprise group with global consolidated turnover exceeding €750 million, you are now legally required to comply with South Africa's Global Minimum Tax framework — and the clock is running. SARS opens GMT registration on eFiling on 16 March 2026, and any entity that has not aligned its eFiling access and authorisation arrangements before that date risks being locked out of the subscription process from day one.

This is not a future consideration. The Global Minimum Tax Act, 2024 (GMTA) and the Global Minimum Tax Administration Act, 2024 (GMTAA) are already in force. Both Acts came into operation on 1 January 2024 and apply to fiscal years beginning on or after that date. Registration, notification, and filing obligations are live — SARS is simply now making the eFiling infrastructure available to administer them.

What the Global Minimum Tax Actually Means for Your Business

The GMT is South Africa's implementation of the OECD's Pillar Two Model Rules, formally known as the Global Anti-Base Erosion (GloBE) Rules. These rules were released on 20 December 2021 and agreed by 137 member jurisdictions of the OECD/G20 Inclusive Framework on Base Erosion and Profit Shifting (BEPS). The G20 Finance Ministers and Leaders endorsed them in October 2021.

The core objective is straightforward: large multinational enterprises must pay a minimum effective tax rate of 15% on income in every jurisdiction where they operate. If a group's effective tax rate in any jurisdiction falls below 15%, a top-up tax is triggered to bring the total to that floor. The rules exist specifically to close opportunities for base erosion and profit shifting that have accumulated over more than a century of international tax frameworks — frameworks that were designed before the digital economy existed.

South Africa has adopted the OECD GloBE rules using an ambulatory approach, which means the legislation automatically incorporates future updates to the OECD Model Rules without requiring Parliament to pass new legislation each time. This is a deliberate design choice — it ensures South Africa's GMT framework stays current as the OECD continues to refine the rules.

Which Entities Are In Scope — and Which Are Not

The GMT applies to MNE groups that meet a specific threshold: global consolidated turnover exceeding €750 million in at least two of the four tax years immediately preceding the reporting fiscal year. This captures both publicly traded and privately held companies, including subsidiaries, branches, permanent establishments, domestic joint ventures, and domestic joint venture subsidiaries that form part of the consolidated group.

The rules are sector-agnostic — the industry you operate in does not determine whether you fall in scope. What matters is the group's global consolidated turnover and whether you form part of a consolidated group that crosses the threshold.

The following entities are explicitly excluded from scope: Governmental Entities, International Organisations, Non-profit Organisations, Pension Funds, Investment Funds that are Ultimate Parent Entities, and Real Estate Investment Vehicles. If your group falls below the €750 million threshold or does not form part of a consolidated group, you are generally excluded.

How the Charging Mechanisms Work: IIR and DMTT

South Africa has implemented two primary charging mechanisms under the GMT framework.

The Income Inclusion Rule (IIR) applies to South African tax resident MNE groups with foreign subsidiaries. Where the effective tax rate in a foreign jurisdiction falls below 15%, the IIR imposes a top-up tax on the South African parent for each reporting fiscal year — defined as the accounting period for which the ultimate parent entity prepares its consolidated financial statements. Note that South Africa has not adopted the Under-Tax Payments Rule (UTPR) charging provisions; these are not applicable under South African law.

The Domestic Minimum Top-up Tax (DMTT) applies to low-taxed profits of foreign inbound MNEs with constituent entities in South Africa. Domestic constituent entities, joint ventures, and joint venture subsidiaries are jointly and severally liable for the DMTT. It is calculated across all domestic constituent entities of the MNE group, following the GloBE Model Rules with local modifications.

The rule order under GloBE is clear: the low-taxed jurisdiction has the primary right to collect top-up tax under its Qualified Domestic Minimum Top-up Tax (QDMTT). If that jurisdiction has no QDMTT, the jurisdiction of the Ultimate Parent Entity applies the IIR. If the UPE's jurisdiction has not implemented a Qualified IIR, the next entity in the ownership chain in a jurisdiction with an IIR steps in. Where no Qualified IIR applies, the UTPR jurisdictions collect the top-up tax.

What SARS Requires You to Do — and When

Compliance under the GMT framework involves three distinct obligations: registration, notification submission, and return filing. Each has its own deadline, and missing any one of them creates compounding risk.

Registration: Every in-scope MNE must apply for registration with SARS in the prescribed form and format by the prescribed due date. From 16 March 2026, this process will be administered via SARS eFiling. To complete registration, your entity must have a Registered Representative (RR) correctly configured on eFiling — an authorised individual who can act on behalf of the legal entity within the system's role-based access controls.

Notification submission: Domestic Constituent Entities (DCEs) must submit the GloBE Information Return (GIR) no later than six months prior to the filing due date of the GIR. For the 2024 fiscal year, or the first fiscal year for which the GIR must be filed, that due date is 15 or 18 months after the end of the reportable fiscal year — the specific timeframe depends on your group's circumstances.

SARS has made a dedicated guide available to assist taxpayers with GMT registration and related processes. Enquiries can be directed to SARS directly through the GMT-specific contact channel listed on the SARS website.

The Immediate Risk: eFiling Access Delays

SARS has been explicit about one operational risk that many affected entities will overlook: if your eFiling access and authorisation arrangements are not correctly aligned before 16 March 2026, you will not be able to complete the GMT subscription process when the functionality goes live.

This is an administrative bottleneck, not a grace period. eFiling operates on secure, role-based access controls. If the Registered Representative for your legal entity is not correctly configured — whether because of staff changes, outdated records, or incomplete eFiling onboarding — you cannot register for GMT on the system regardless of your willingness to comply. Fixing eFiling access issues takes time. SARS has flagged this specifically because they anticipate it will be the most common point of failure for otherwise compliant entities.

The practical consequence is this: a delay in eFiling access alignment is a delay in GMT registration, which is a failure to meet a statutory compliance deadline under the GMTA and GMTAA. The reputational and financial consequences of being non-compliant under South Africa's GMT framework — legislation backed by international treaty commitments involving 137 jurisdictions — are not trivial.

What to Do Right Now

If your entity is part of an MNE group that meets or may meet the €750 million consolidated turnover threshold, take these steps immediately — not in February 2026.

First, confirm whether your group is in scope. Review your group's global consolidated turnover for the preceding four fiscal years. If you crossed €750 million in at least two of those years, you are subject to GMT obligations that are already legally effective from 1 January 2024.

Second, audit your SARS eFiling access. Identify who your Registered Representative is for each South African legal entity in the group. Verify that their access is active, correctly assigned, and that they have the authority to act on behalf of the entity on eFiling. If there are gaps, resolve them now — not on 15 March 2026.

Third, understand your charging mechanism exposure. Determine whether your South African entities are exposed under the IIR (as an outbound South African MNE parent), the DMTT (as a constituent entity of an inbound foreign MNE group), or both. This will determine the shape of your GMT compliance obligations and the internal resourcing required.

Fourth, track your notification and filing deadlines. The GIR submission obligation for the 2024 fiscal year is already active. Calculate your specific due dates based on your group's reporting fiscal year and build those into your tax compliance calendar now.

Fifth, engage your tax advisors specifically on GMT. South Africa's ambulatory adoption of the GloBE rules means the framework will evolve. Budget 2026 has already produced new FAQs on GMT changes. Staying current is not optional — it is a built-in feature of how this legislation works.

Check Your GMT Compliance Status with ClearComply

South Africa's Global Minimum Tax framework is one of the most technically complex compliance obligations the country has ever introduced for large multinationals. The interaction between the IIR, DMTT, GIR notification deadlines, and eFiling access requirements creates multiple failure points — and the legislation is already in force.

ClearComply tracks GMT developments alongside every other material compliance obligation affecting South African businesses, so you know what applies to you, what's changed, and what action is required before a deadline becomes a liability. Run your free compliance check at clearcomply.co.za/check and find out exactly where your business stands. You can also read our related article on how to manage SARS eFiling access and Registered Representative configurations to address the most immediate operational risk before 16 March 2026.