OECD Pillar Two Global Minimum Tax: What MNEs in Africa Must Know

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Last reviewed: October 2, 2026

The OECD/G20 Inclusive Framework’s Pillar Two rules — establishing a global minimum corporate tax rate of 15% — have been enacted, in one or more of their charging mechanisms, by approximately 60 of the 148 Inclusive Framework jurisdictions, with global minimum tax laws in 37 jurisdictions effective from the 2024 tax year (position as at June 2026). For multinational enterprises (MNEs) with operations across Africa, this creates both compliance obligations and strategic tax planning challenges that cannot be deferred.

What Pillar Two Is — and Is Not

Pillar Two introduces the GloBE Rules (Global Anti-Base Erosion) that ensure large MNEs pay a minimum effective tax rate (ETR) of 15% on their income in each jurisdiction where they operate.

Pillar Two applies to MNEs with annual consolidated group revenue of EUR 750 million or more in at least two of the four preceding fiscal years. Smaller groups — including most African-headquartered businesses — are not directly within scope, but may be indirectly affected as subsidiaries of qualifying groups.

• Income Inclusion Rule (IIR): Parent tops up tax where subsidiaries pay below 15%
• Undertaxed Profits Rule (UTPR): Backup rule allowing other group members to collect top-up tax
• Subject to Tax Rule (STTR): Covers certain payments to low-tax jurisdictions
• Qualified Domestic Minimum Top-up Tax (QDMTT): Countries retain revenue by implementing own top-up

African Jurisdictions and Implementation Status

South Africa is no longer the only African jurisdiction with a minimum tax of this kind in force. South Africa’s Global Minimum Tax Act and Global Minimum Tax Administration Act apply for fiscal years beginning on or after 1 January 2024 and carry both an income inclusion rule and a domestic minimum top-up tax, though no UTPR. Kenya’s domestic minimum top-up tax, introduced by the Tax Laws (Amendment) Act, 2024, came into force on 27 December 2024 and applies from 1 January 2025 to groups with consolidated revenue of at least EUR 750 million — roughly KES 95 billion — in at least two of the four preceding periods; the OECD’s May 2026 update to its central record of legislation with transitional qualified status recognises it as a QDMTT with effect from 1 January 2025. Nigeria has legislated outside the GloBE framework: the Nigeria Tax Act, 2025, signed on 26 June 2025 and effective from 1 January 2026, imposes a 15% minimum effective rate on constituent entities of MNE groups and on any company with turnover of NGN 20 billion or more, and tops up Nigerian parents whose foreign subsidiaries are taxed below 15% — a domestic measure aligned with the global minimum tax principle rather than a Pillar Two implementation. Positions elsewhere on the continent are moving and should be confirmed jurisdiction by jurisdiction.

For MNEs with low-tax structures in DRC, Cameroon, or Gabon — where statutory rates may fall below 15% in specific incentive regimes or tax holiday zones — the exposure runs first to any qualified domestic minimum top-up tax in the host country, and otherwise to an income inclusion rule in the parent jurisdiction, typically in Europe or the UK. The US should no longer be assumed: the Inclusive Framework’s side-by-side package of 5 January 2026 switches off the IIR and the UTPR for groups whose ultimate parent sits in a jurisdiction with a qualified side-by-side regime, for fiscal years beginning on or after 1 January 2026, and the United States is so far the only jurisdiction listed as qualifying. Host-country QDMTTs are not switched off by that safe harbour.

Practical Steps for Finance Teams

If your group falls within scope, the first step is calculating the Effective Tax Rate (ETR) under GloBE rules in each jurisdiction. This is not the statutory rate — it uses specific GloBE definitions for income and covered taxes.

• Map all jurisdictions where statutory rates fall below 15%, including DRC zones with investment incentives or tax holidays
• Calculate Substance-Based Income Exclusions (SBIE) which reduce the top-up base for payroll and tangible assets
• Identify jurisdictions with enacted QDMTT to understand where top-up will be paid
• Confirm the FY2024 GloBE Information Return and any local Pillar Two returns were filed — the first deadline was 30 June 2026 in most jurisdictions, so treat any gap as remediation and penalty exposure rather than a future task

The compliance burden of Pillar Two is substantial. MNEs should allocate dedicated tax team capacity and budget for system changes in 2026.

Strategic Implications

Pillar Two fundamentally alters the economics of tax-driven structures, though less uniformly since January 2026. The substance-based tax incentive safe harbour, which applies for fiscal years beginning on or after 1 January 2026, can reduce to nil the top-up tax attributable to qualified tax incentives — those calculated by reference to expenditure incurred or output produced — subject to a substance-based cap set at the higher of 5.5% of eligible payroll costs or of 5.5% of depreciation on eligible tangible assets in that jurisdiction, or 1% of the carrying value of those assets if a five-year election is made. Investment incentive regimes that are not calculated by reference to expenditure or output, such as a blanket tax holiday or a headline rate reduction, fall outside that safe harbour; where relief offered by an African country takes that form, the original point stands: top-up tax still erodes the net benefit for qualifying MNEs.

This may shift investment location decisions, but the premise needs qualifying for fiscal years beginning on or after 1 January 2026. Where a host-country incentive is calculated by reference to expenditure or output, the substance-based tax incentive safe harbour can reduce the associated top-up tax to nil within its substance cap, so the incentive retains real after-tax value and an in-scope MNE no longer necessarily pays 15% regardless of local relief. The locational argument — that infrastructure quality, workforce skills, market access, and regulatory stability become more decisive than headline tax relief — therefore holds most strongly where local relief is not calculated by reference to expenditure or output, as with a blanket tax holiday or a headline rate reduction.

ValidWave Consulting advises international groups on Pillar Two implications of their African operations, including ETR modelling, QDMTT assessment, and IIR top-up computation.