Zambia and the Oecd/globe Global Minimum Tax (pillar Two) 2026: What Multinationals and Mining Groups Must Do Now

Global minimum tax Zambia preparations have moved from a theoretical concern to an urgent operational priority as 2026 ushers in the wave of domestic implementation of the OECD/GloBE Pillar Two rules across the world. For multinational enterprises with Zambian subsidiaries, and especially for the copper and extractive groups that anchor the Zambian economy, the question is no longer whether these rules matter, but how quickly finance teams must mobilise data, accounting policies and documentation to meet them. This practitioner guide sets out Zambia’s current position, explains the mechanics of the GloBE rules, compares the domestic charging options available to Zambia, and delivers a concrete compliance roadmap for tax directors and CFOs.

Throughout, we distinguish clearly between what the OECD model rules establish and what remains, as of the review date, subject to Zambian legislative action.

This article is general guidance and does not constitute tax or legal advice. Consult local counsel for application to specific facts.

Executive summary: what Zambian multinationals must know about the global minimum tax Zambia landscape

The following quick-take distils the essential points for finance leaders who need to act in the 2026 window:

• Scope is global, obligations are group-wide. Pillar Two applies to multinational enterprise (MNE) groups with consolidated annual revenue of at least €750 million. Even where Zambia has not yet legislated a domestic charge, Zambian subsidiaries can trigger top-up tax at the parent or intermediate level under another jurisdiction’s rules.
• Domestic status must be confirmed, not assumed. Any statement about whether Zambia has enacted a Qualified Domestic Minimum Top-up Tax (QDMTT), an Income Inclusion Rule (IIR) or an Undertaxed Profits/Payments Rule (UTPR) must be verified against Ministry of Finance and Zambia Revenue Authority (ZRA) publications. Where no formal notice has been published, the conditional nature of the obligation should be stated plainly.
• The mining sector is uniquely exposed. Ring-fenced allowances, accelerated depreciation, mineral royalties and investment incentives can depress a Zambian entity’s GloBE effective tax rate (ETR) below 15%, creating top-up exposure that did not exist under ordinary corporate income tax analysis.
• Immediate actions centre on data. Entity-level ETR computation under GloBE depends on financial accounting data reconciled to specific GloBE adjustments. Groups should begin a data-readiness diagnostic now rather than waiting for domestic regulations.
• Timelines are compressing. With many jurisdictions operating IIRs and QDMTTs for fiscal years beginning in and around 2024–2025, Zambian operations within in-scope groups may already be feeding into group GloBE computations for 2026 reporting.

What are the OECD/GloBE (Pillar Two) rules?

The OECD global minimum tax, delivered through the GloBE rules under Pillar Two of the Two-Pillar Solution, is designed to ensure that large multinational groups pay an effective tax rate of at least 15% on their income in every jurisdiction in which they operate. Where the ETR in a jurisdiction falls below 15%, a “top-up tax” is levied to bring the group’s effective rate in that jurisdiction up to the minimum. The OECD model rules provide the technical architecture, definitions, the computation of GloBE income, covered taxes, the ETR calculation and the ordering of charging provisions.

Three interlocking charging mechanisms give the rules their reach:

• Income Inclusion Rule (IIR). The primary rule, applied at the level of the ultimate (or an intermediate) parent entity, which charges top-up tax on the low-taxed income of foreign subsidiaries.
• Undertaxed Profits Rule (UTPR). A backstop that allocates top-up tax among jurisdictions where no IIR has captured the low-taxed income, typically by denying deductions or requiring an equivalent adjustment.
• Qualified Domestic Minimum Top-up Tax (QDMTT). A domestic charge that allows the source jurisdiction, Zambia, in our context, to collect the top-up tax itself rather than ceding it to a parent jurisdiction’s IIR or another jurisdiction’s UTPR.

Who is in scope of the global minimum tax Zambia rules?

The GloBE rules apply to constituent entities of an MNE group with consolidated group revenue of €750 million or more in at least two of the four fiscal years immediately preceding the tested year. A Zambian subsidiary of such a group is a “constituent entity” whose income and taxes feed into the jurisdictional ETR for Zambia. Certain excluded entities, governmental entities, international organisations, non-profit organisations, and specified investment and pension funds, fall outside the rules, but ordinary commercial subsidiaries, including mining operating companies, do not. Crucially, scope is assessed at the group level: a modestly sized Zambian entity can be fully within the regime because its ultimate parent exceeds the revenue threshold.

How top-up tax is calculated (a simple example)

The computation proceeds in broad stages set out in the OECD model rules. First, the group determines the GloBE income (or loss) for each constituent entity, starting from financial accounting net income and applying prescribed adjustments. Second, it determines the “adjusted covered taxes” attributable to that income. Third, it aggregates these at the jurisdictional level to compute the jurisdictional ETR: adjusted covered taxes divided by net GloBE income. Fourth, where the ETR is below 15%, the top-up tax percentage (15% minus the jurisdictional ETR) is applied to the excess profit (GloBE income less a substance-based income exclusion).

As a simplified illustration: if a Zambian jurisdictional group reports GloBE income of US$100 million and adjusted covered taxes of US$10 million, the ETR is 10%. The top-up tax percentage is 5% (15% − 10%). Setting aside the substance-based income exclusion for simplicity, the top-up tax would be 5% of US$100 million, or US$5 million. This computed amount illustrates the method only and should be refined by applying the substance-based carve-out and the precise adjustments described in the OECD model rules.

Has Zambia implemented Pillar Two? Current legislative and administrative status

The threshold question for any in-house tax team is whether Zambia has adopted a domestic GloBE charge, and if so, from what date. This must be answered by reference to primary Zambian sources, the Ministry of Finance and the Zambia Revenue Authority, rather than to secondary commentary. Where those authorities have not published a Pillar Two-specific statute, statutory instrument or administrative notice, the correct position to record is that no formal domestic Pillar Two measure has been published as of the review date, and that the analysis below therefore proceeds on a conditional basis.

That conditional posture is not a reason to delay. Even absent a Zambian QDMTT or IIR, Zambian low-taxed income can be swept into top-up tax computations at the level of a foreign parent operating an IIR, or allocated under a UTPR in another jurisdiction. In practice, this means that the global minimum tax Zambia exposure of a group can be determined entirely outside Zambia until Zambia chooses to capture that revenue itself through a domestic charge.

Recent Finance Act changes and ministry statements

Domestic implementation of Pillar Two in Zambia would ordinarily require amendments to the primary tax legislation (principally the Income Tax Act), delivered through the annual Finance Act and accompanying statutory instruments, together with administrative guidance from the ZRA on computation, notification and filing. Finance teams should monitor the Ministry of Finance and National Planning for budget statements and legislative instruments, and the ZRA for taxpayer notices, template GloBE Information Returns and procedural guidance. Until such instruments are published, any assertion that Zambia has enacted a QDMTT or IIR should be avoided; the responsible position is to track announcements and update the analysis when official texts appear.

What to watch: the likely timeline for implementing regulations

Industry observers expect that jurisdictions reliant on inbound investment and extractive revenues will weigh the choice between adopting a QDMTT, thereby retaining top-up revenue domestically, and leaving the revenue to be collected abroad. For a jurisdiction in Zambia’s position, the practical sequence of implementation would typically run from a policy announcement, to primary legislation in a Finance Act, to subordinate regulations, and finally to administrative guidance and taxpayer templates. Early indications across comparable African jurisdictions suggest that regional bodies are actively supporting administrations in designing QDMTTs that interact coherently with existing resource-tax regimes. Tax directors should treat the window before any Zambian charge takes effect as preparation time, not downtime.

How Pillar Two will affect multinational groups with Zambian subsidiaries

For multinational groups, the practical effect of the global minimum tax Zambia regime is to require a parallel tax computation for each Zambian constituent entity that follows GloBE principles rather than purely domestic tax rules. This parallel computation frequently produces an ETR that diverges from the headline Zambian corporate income tax rate, because the GloBE base and the domestic tax base are defined differently and because certain Zambian reliefs reduce cash tax without reducing GloBE income.

Several features of the Zambian tax environment deserve particular attention when modelling exposure:

• Timing differences from capital allowances. Accelerated or enhanced capital allowances reduce taxable profit in early years, lowering covered taxes relative to accounting income and depressing the ETR. The GloBE rules address some timing differences through deferred tax accounting, but the interaction must be modelled carefully.
• Mineral royalties. Whether a royalty counts as a “covered tax” for GloBE purposes depends on its legal character. Royalties that are deductible production levies rather than taxes on income generally do not increase adjusted covered taxes, meaning they do not help lift a Zambian entity’s ETR toward 15%.
• Withholding taxes and intragroup financing. Withholding taxes on cross-border payments interact with the covered-tax computation and with the allocation of taxes between jurisdictions. Intragroup financing arrangements that strip income out of Zambia can reduce the Zambian GloBE base, altering the ETR in ways that require integrated transfer pricing and GloBE analysis.
• Consolidated group exposure. Because top-up tax is computed on a jurisdictional basis and charged at group level, a single low-taxed Zambian operation can generate a group liability payable elsewhere, affecting the group’s overall effective tax cost and its cash-flow planning.

Examples: trading versus mining subsidiaries

Consider two contrasting Zambian constituent entities within the same in-scope group. A trading subsidiary earning US$50 million of GloBE income and paying US$8 million of covered taxes has an ETR of 16%, above the minimum, so no top-up tax arises. Now consider a mining subsidiary that, after claiming substantial capital allowances and deducting royalties, reports US$50 million of GloBE income but only US$6 million of adjusted covered taxes. Its ETR is 12%, triggering a top-up percentage of 3% and a top-up tax of US$1. 5 million (before applying the substance-based income exclusion, which would reduce the excess profit subject to top-up by reference to payroll and tangible asset carve-outs).

The divergence illustrates why extractive operations, despite nominal statutory rates, can be the entities that actually generate global minimum tax Zambia liabilities.

Impact on group restructuring and cash-flow planning

The likely practical effect of these dynamics is that groups will revisit historic structures built around Zambian incentives, financing and royalty treatment. Restructuring driven purely by reducing domestic cash tax may deliver little GloBE benefit, and could even increase exposure if it lowers covered taxes without lowering GloBE income. CFOs should fold GloBE outcomes into dividend policy, financing decisions and intra-group pricing, and should model the cash-flow timing of top-up tax payments, which may fall due in a jurisdiction different from the one generating the underlying income.

Compliance checklist: accounting, reporting and tax positions for Zambian entities

Compliance with the global minimum tax Zambia requirements is fundamentally a data and controls exercise. The GloBE computation draws on financial accounting figures, tax data and entity-level detail that most groups have never previously assembled in a single reconciled dataset. The following step-by-step programme is designed to be delivered over a six-to-twelve-month horizon.

Accounting adjustments and nomination of accounting policies

GloBE income begins with financial accounting net income determined under the accounting standard used in the group’s consolidated financial statements, subject to prescribed adjustments. Zambian entities must therefore reconcile local statutory accounts to the group reporting standard and identify each GloBE adjustment, for example, the treatment of certain dividends, equity gains and losses, policy-disallowed expenses, and deferred tax. Groups should document their accounting policy elections and ensure consistency across constituent entities so that the jurisdictional ETR is computed on a coherent basis.

Data collection and IT systems

The practical bottleneck for most groups is data. Teams should map the data points required for each Zambian constituent entity, accounting net income, current and deferred tax, payroll costs and the carrying value of tangible assets for the substance-based income exclusion, and the character of each material tax and levy. IT systems and ERP configurations frequently need enhancement to extract this information at the required granularity. Establishing a repeatable, auditable data pipeline early avoids a year-end scramble and supports the accuracy demanded by the computation.

Interaction with transfer pricing files

Transfer pricing documentation and GloBE reporting are mutually reinforcing. Country-by-country reporting data, local files and master files feed into, and must be consistent with, the GloBE Information Return. Transfer pricing adjustments change the Zambian GloBE base and therefore the ETR, so transfer pricing and GloBE workstreams should be coordinated rather than run in silos. Inconsistencies between the two create audit risk and may undermine any transitional safe harbours a group seeks to rely upon.

Notification and filing obligations (expected)

Where Zambia implements a domestic charge, groups should anticipate notification requirements identifying the filing constituent entity, and the filing of a GloBE Information Return (or the local equivalent) within prescribed deadlines. Until the ZRA publishes templates and deadlines, groups should prepare on the basis of the OECD’s standardised information return framework and the filing obligations arising in parent and intermediate jurisdictions, then align Zambian procedures once formal guidance is issued.

A clear allocation of responsibilities keeps the programme on track. The following illustrative roles matrix helps groups assign ownership:

Specific impacts on the mining and extractive sector in Zambia

Mining is where the global minimum tax Zambia debate becomes most consequential. The extractive sector operates under a distinctive fiscal architecture, mineral royalties, ring-fenced allowances, and investment incentives, much of which was designed to attract and retain capital. Pillar Two can neutralise the intended effect of these incentives by clawing back, as top-up tax, the very reductions in effective rate that the incentives were meant to deliver.

Royalties, concession agreements and fiscal stability

Mineral royalties are a cornerstone of Zambia’s resource fiscal regime, but their GloBE treatment is not automatic. If a royalty is characterised as a levy on production or revenue rather than a tax on income, it is unlikely to count as a covered tax, and therefore does not raise the ETR toward the 15% floor. A mining group may thus pay very substantial royalties to Zambia and still face top-up tax because its covered taxes, measured on a GloBE basis, are low relative to its GloBE income.

Fiscal stability arrangements raise a further complication: such clauses may purport to freeze a fiscal regime, but they cannot bind the operation of another jurisdiction’s IIR or UTPR, which can capture the low-taxed income regardless. The interaction between domestic stability commitments and extraterritorial top-up charges is one of the most significant unresolved tensions for the sector.

How incentives may be adjusted or grandfathered

Governments confronting Pillar Two have had to reconsider whether tax incentives remain effective. Incentives that reduce cash tax without a corresponding GloBE benefit simply transfer revenue to another treasury via top-up tax, undermining the policy rationale. The practical response in many jurisdictions has been to pivot from income-based incentives toward qualified refundable tax credits or expenditure-based support that are treated more favourably under the GloBE rules, and to consider a QDMTT so that any top-up is retained domestically. Whether Zambia grandfathers existing incentives, redesigns them, or adopts a QDMTT is a policy choice to be confirmed from Ministry of Finance announcements; groups should model each scenario rather than assume continuity of their current incentive position.

Worked example: a Zambian copper operation

Assume a copper mining constituent entity reports GloBE income of US$200 million. After enhanced capital allowances and the deduction of royalties (characterised as production levies and therefore not covered taxes), its adjusted covered taxes amount to US$20 million, producing an ETR of 10%. The top-up percentage is 5% (15% − 10%). Before the substance-based income exclusion, the top-up tax on US$200 million would be US$10 million. Applying a substance-based carve-out, a percentage of eligible payroll and tangible asset carrying value, reduces the excess profit subject to top-up, so the final liability would be lower.

If Zambia has not enacted a QDMTT, that US$10 million (as reduced by the carve-out) is collected not by Zambia but by the jurisdiction operating the applicable IIR or UTPR. The example underscores the revenue stakes: without a domestic charge, Zambia forgoes top-up tax arising from its own mineral wealth. The figures are illustrative and the precise computation must follow the adjustments and carve-out percentages in the OECD model rules.

Options for domestic implementation and what Zambia is likely to choose

Zambia’s principal strategic decision is which charging mechanism, if any, to adopt domestically. The three options carry different revenue, administrative and investor-relations consequences.

Pros and cons for Zambia (fiscal and administrative)

For a source jurisdiction that hosts substantial inbound investment and few large outbound parents, a QDMTT is the option that most directly protects the domestic revenue base: it ensures that any top-up on low-taxed Zambian profits is collected in Zambia rather than abroad. The trade-off is administrative capacity, a QDMTT must be computed, filed and audited to a standard that qualifies it under the GloBE framework, which demands investment in ZRA systems and skills. An IIR is of limited domestic relevance unless Zambia hosts qualifying parent entities, while a UTPR serves mainly as a backstop.

Regional support for African administrations is available to help design QDMTTs that cohere with existing mining fiscal regimes, which strengthens the case for prioritising a well-designed domestic charge.

Practical next steps for tax directors and CFOs: a 90-day plan

To convert awareness into readiness, finance leaders should execute a focused 90-day programme:

1. Diagnostic (days 1–20). Confirm group scope against the €750 million threshold and identify every Zambian constituent entity. Establish the baseline jurisdictional ETR for Zambia using available data.
2. Systems and data (days 15–45). Map required GloBE data points, assess ERP and reporting-system gaps, and stand up a repeatable data-collection process for Zambian entities.
3. Documentation (days 30–60). Reconcile statutory accounts to the group reporting standard, document accounting policy elections, and align transfer pricing files with anticipated GloBE positions.
4. Modelling (days 45–75). Build top-up tax models for trading and mining entities, run QDMTT and no-QDMTT scenarios, and quantify cash-flow and incentive impacts.
5. Legal review and stakeholder engagement (days 60–90). Obtain Zambian legal advice on fiscal stability arrangements and incentive treatment, brief the board on exposure, and establish a monitoring routine for Ministry of Finance and ZRA announcements.

Appendix: technical notes, calculation example and reference table

The GloBE computation relies on a defined set of adjustments to financial accounting income. The table below summarises key adjustment categories at a high level; practitioners should apply the precise provisions of the OECD model rules in each case.

Readers can consult the related Zambia, Global Law Experts: lawyers and resources page for practitioner contacts and further operational guidance.

Conclusion

The global minimum tax Zambia agenda demands action in 2026 regardless of whether Zambia has yet enacted a domestic charge, because low-taxed Zambian income can be captured by foreign parent-level rules in the interim. Multinationals, and mining groups above all, should treat the current period as preparation time: confirm scope, build the GloBE data pipeline, reconcile accounting and transfer pricing positions, and model top-up exposure under QDMTT and no-QDMTT scenarios. The sector-specific stakes are high, because royalties and ring-fenced incentives can depress effective rates below 15% and transfer revenue abroad unless Zambia adopts a domestic charge. Groups that mobilise early will be best placed to manage the compliance burden, protect cash flow, and engage constructively as Zambia finalises its approach.

The responsible path is to verify every domestic status claim against Ministry of Finance and ZRA sources and to update positions as official guidance on the global minimum tax Zambia regime emerges.

This article is general guidance and does not constitute tax or legal advice. Consult local counsel for application to specific facts.

Sources

1. OECD, Base Erosion and Profit Shifting (BEPS) / Pillar Two
2. OECD, Global Anti-Base Erosion Model Rules (Pillar Two)
3. Zambia Revenue Authority (ZRA)
4. Ministry of Finance and National Planning, Zambia
5. UNCTAD, World Investment Report
6. IMF, Zambia Country Page
7. African Tax Administration Forum (ATAF)