Global Minimum Tax: What Nigerian Multinational Businesses Need to Understand

A Nigerian company that has subsidiaries abroad, or that belongs to a foreign group, can no longer look at its Nigerian tax position in isolation. Minimum tax rules now ask a group-level question: across each country where the group operates, is the effective tax rate at least 15 percent? This post explains how the rules work, where Nigerian law fits in, and what a business should prepare.

How the Global Minimum Tax Works

The OECD/G20 Pillar Two framework applies to multinational groups with consolidated revenue of at least €750 million. For each jurisdiction, the group calculates an effective tax rate (ETR) using agreed accounting and tax adjustments. Where the rate is below 15 percent, a top-up tax may be due. The top-up can be collected in three ways:

• A domestic minimum tax in the country where the low-taxed profit arises.
• An income inclusion rule, under which the parent company’s country collects tax on low-taxed foreign subsidiaries.
• An under taxed profits rule, which acts as a backstop where the other two do not apply.

On 5 January 2026, the OECD announced a Side-by-Side Package, agreed by more than 145 jurisdictions. It includes safe harbors and provides that groups with a US parent company are not subject to the income inclusion rule or the under taxed profits rule where the US minimum tax rules are treated as equivalent. The package changes how the rules interact. It does not remove them for other groups.

Where the Nigeria Tax Act 2025 Fits

The Nigeria Tax Act, 2025, which took effect on 1 January 2026, contains its own minimum tax provisions. Based on published summaries of the Act:

• Section 57 applies a 15 percent minimum ETR to a company that is a constituent entity of a multinational enterprise group, and to any other company with aggregate turnover of ₦20 billion or more in the relevant year of assessment.
• Section 6(3) applies a top-up tax to a Nigerian parent company where its foreign subsidiaries pay income tax at an ETR below 15 percent.
• Section 56 sets the company income tax rate at 30 percent for companies other than small companies.
• Section 59 introduces a development levy of 4 percent on assessable profits, which replaces several earlier earmarked taxes and excludes small and non-resident companies.

Readers should confirm the exact thresholds, definitions, and any NRS guidance against the Act and current NRS publications, because the details of the computation are technical.

Step-by-Step: What a Nigerian Group Should Do

1. Establish whether the group is in scope. Add up consolidated group revenue and compare it with the €750 million threshold. Separately, check the ₦20 billion turnover test for the Nigerian entity.
2. Map the group. Prepare a chart of every entity, its jurisdiction, its ownership, and its tax status.
3. Calculate the effective tax rate by jurisdiction. Use financial statements that follow a consistent accounting standard, and identify the tax adjustments that the rules require.
4. Review incentives. A tax credit or exemption that lowers the rate in one country may lead to a top-up tax if the rate falls below 15 percent. Incentive planning should be done at group level.
5. Build the data process. Group reporting depends on accurate local figures delivered on time. Agree the format and timetable between the Nigerian entity and the group finance team.
6. Check transfer pricing support. Intra-group charges affect where profit is reported, so documentation should be current.
7. Take professional advice early. Computations and elections are easier to plan before a financial year closes than after.

Why This Matters to Nigerian Taxpayers

A group that does not measure its ETR may find that tax benefits claimed in Nigeria are offset by tax paid elsewhere in the group. A group that measures it can decide, with full information, how to structure investments and use incentives. Nigerian entities that supply accurate and timely data are also in a stronger position within their groups.

Tax Implications

• The minimum ETR is a separate calculation from the ordinary company income tax computation, and both must be completed.
• A top-up tax is an additional liability and should be included in tax provisions and cash-flow forecasts.
• Dividends paid to foreign shareholders remain subject to withholding tax, and NIPC guidance states that transfer abroad is subject to evidence of tax compliance.
• Under the Nigeria Tax Administration Act, late filing attracts a penalty reported as ₦100,000 in the first month and ₦50,000 for each subsequent month, so timetables matter.

Why Every Business Should Comply with Tax Regulation

Group-level rules rely on the accuracy of each entity’s records. A Nigerian subsidiary that files accurately and on time protects its own position and supports the group’s reporting. The Nigeria Tax Administration Act also provides an advance ruling mechanism, which allows a taxpayer to request written clarification from the NRS before carrying out a proposed transaction, and a Tax Ombuds office for disputes.

Tips on Credits and Opportunities

• Review the Economic Development Tax Incentive, which took effect on 1 January 2026 and offers a 5 percent tax credit on qualifying capital expenditure for eligible companies in priority sectors, and assess it alongside the minimum tax position.
• Keep expenditure records in a form that can be matched to incentive conditions.
• Consider whether an advance ruling is appropriate for a significant or unusual transaction.

The Advantage of Professional Guidance

Minimum tax calculations combine accounting, tax, and group structure questions. A professional consulting firm can help a business assess scope, prepare local data, document transfer pricing, and follow NRS guidance as it develops. Under the Nigeria Tax Administration Act, an accreditation regime applies to tax consultants and agents who represent taxpayers before the NRS, so a business may wish to confirm its adviser’s accreditation.

PRUDENTIAL CONSULTING LIMITED supports Nigerian entities, including those within foreign groups, in preparing local tax records and filings for group-level requirements.

Relevant Tax Law

• Nigeria Tax Act, 2025, including sections 6, 56, 57 and 59.
• Nigeria Tax Administration Act, 2025.
• Nigeria Revenue Service (Establishment) Act, 2025.
• OECD/G20 Pillar Two model rules and the January 2026 Side-by-Side Package, which apply in Nigeria only to the extent given effect under Nigerian law.

Frequently Asked Questions

Does the global minimum tax apply to every Nigerian company?

No. The Pillar Two framework targets groups with consolidated revenue of €750 million or more. The Nigeria Tax Act also contains a minimum ETR test linked to a ₦20 billion turnover level, so companies should check which test applies to them.

What is an effective tax rate?

It is the income tax expense of a jurisdiction divided by its profit, both measured using the rules of the framework, so it can differ from the headline tax rate.

Can a tax incentive lead to a top-up tax?

It can. If an incentive reduces the effective rate below 15 percent, a top-up tax may apply, which is why incentive planning is best done at group level.

Where can I get further assistance?

Contact Professional Tax Consulting Firm in Lagos, Nigeria on:

WhatsApp: 08056219998

Email: info@prudentialconsulting.com.ng

Website: https://www.prudentialconsulting.com.ng