How Nigeria's 2026 Tax Reforms Change M&A Deal Structure and Tax Due Diligence, a Practical Guide for Corporate Lawyers

Nigeria’s 2026 tax reform package has fundamentally altered the landscape of M&A tax in Nigeria, compelling deal teams to rethink everything from transaction structure to the scope of pre-closing investigations. The Tax Administration Act 2026, the revised Nigeria Tax Act provisions on corporate income tax, a redesigned VAT exemption architecture and expanded capital gains tax rules collectively create a new compliance reality that touches every stage of an acquisition, from letter of intent through post-deal integration. For in-house counsel, private equity sponsors and transaction lawyers advising on Nigerian deals, understanding these changes is no longer optional; it is a condition of competent deal execution.

This guide provides a practical, section-by-section playbook for structuring, diligencing and documenting M&A transactions under the reformed regime.

Executive Summary: What Changed and Why It Matters for M&A

The tax reform Nigeria enacted through its 2026 legislative package touches six areas that directly affect corporate acquisitions. Deal teams should treat the following as the minimum list of impacts requiring immediate attention:

• Corporate income tax restructuring. The Nigeria Tax Act has revised corporate tax rates and introduced a tiered structure affecting computation of assessable profits, with cascading effects on purchase price allocation and earn-out modelling.
• Capital gains tax expansion. CGT provisions now capture a broader set of asset dispositions and extend territorial reach to certain offshore transfers of Nigerian assets, changing the economics of share-sale exits for foreign sellers.
• VAT exemption redesign. The new exemption architecture narrows previously relied-upon carve-outs for transfers of business as a going concern, requiring fresh analysis of asset-deal structures.
• Mandatory electronic filing. All corporate taxpayers must now file returns electronically through the FIRS platform, and historic non-compliance is a material due diligence red flag that can delay closing or trigger penalties post-acquisition.
• Strengthened enforcement powers. The Tax Administration Act 2026 grants the Federal Inland Revenue Service expanded assessment, audit and information-gathering powers, meaning pre-existing exposures are more likely to be discovered and prosecuted after closing.
• Transfer pricing and anti-avoidance. Tightened general anti-avoidance provisions and refreshed transfer pricing documentation requirements increase the risk that intercompany arrangements within a target group will be challenged.

The practical consequence is clear: deal teams must expand their tax due diligence scope, revisit standard contractual protections and adjust deal-structuring assumptions that may have been valid under the old regime but now carry materially higher risk.

The Legal and Legislative Changes You Must Know, M&A Tax Nigeria Statutes and Dates

Understanding the specific statutes, their effective dates and the provisions most relevant to M&A deal structuring is the necessary starting point. The table below summarises the key legislative instruments and their deal-level implications.

The Tax Administration Act 2026 is the centrepiece of operational change. It consolidates and strengthens FIRS enforcement mechanisms, making the consequences of historic non-compliance, underfiled returns, missed e-filing deadlines, undeclared related-party transactions, significantly more severe. For acquirers, this means that a target company’s tax compliance history is now a first-order due diligence priority, not a secondary workstream to be delegated to junior associates.

The corporate tax Nigeria rules have been recalibrated so that the effective tax rate varies depending on the size and sector of the taxpayer. Deal models must now reflect the target’s specific tier rather than applying a flat rate assumption. Industry observers expect that the tiered approach will create structuring incentives for certain mid-market transactions, particularly where the target qualifies for a lower rate band that would be lost on consolidation with a larger acquirer group.

How the 2026 Reforms Alter M&A Deal Structuring, Options and Examples

Every M&A transaction in Nigeria now requires a fresh structuring analysis. The historical default assumptions, that share sales are generally tax-efficient for sellers and that asset sales carry a manageable VAT cost, must be stress-tested against the reformed rules.

Asset Sale Implications

Asset sales have traditionally been disfavoured in Nigeria because of the double layer of taxation: CGT on the seller’s gain and potential VAT on the transfer of taxable assets. The 2026 VAT exemption redesign adds a new complication. Previously, many practitioners relied on the transfer-of-business-as-a-going-concern (TOGC) exemption to mitigate VAT exposure on asset deals. The narrowed VAT exemptions Nigeria rules now impose stricter conditions for TOGC treatment, requiring that the buyer be a registered VAT person at the time of transfer and that the assets be used to carry on the same kind of business. Failure to satisfy these conditions triggers a full VAT charge, which can represent a material increase in transaction costs.

On the positive side, asset sales allow buyers to obtain a stepped-up tax basis in the acquired assets, which produces higher depreciation allowances and, over time, a lower effective tax rate. Deal teams should model the net present value of enhanced capital allowances against the upfront VAT and CGT costs to determine whether an asset structure remains viable.

Share Purchase Implications

Share acquisitions remain the more common structure for mid-market and large-cap deals. The principal tax cost falls on the seller as a CGT liability on the gain from the disposal of shares. Under the 2026 amendments, the CGT territorial expansion means that a foreign seller disposing of shares in a Nigerian company, or shares in a foreign holding company that derives substantial value from Nigerian assets, may now be subject to Nigerian CGT. This is a critical change for cross-border M&A Nigeria transactions and must be addressed in deal documentation through clear allocation of the CGT burden, gross-up clauses or indemnification.

For the buyer, a share purchase carries the inherent risk of inheriting the target’s historic tax liabilities. With the TA Act’s expanded enforcement powers, this risk is amplified. Buyers should insist on comprehensive tax representations and a ring-fenced tax indemnity (discussed below) as non-negotiable protections.

Merger and Amalgamation Specifics

Court-sanctioned mergers and amalgamations under Nigeria’s Companies and Allied Matters Act may qualify for rollover relief, deferring CGT and, in some cases, stamp duty. The 2026 reforms have not eliminated these reliefs, but the conditions for qualification are more rigorously policed. The FIRS is expected to scrutinise merger applications more carefully and may deny relief where the transaction is perceived to be primarily tax-motivated rather than driven by genuine commercial rationale.

Practitioners should ensure that the business case for a merger is documented contemporaneously and that the application to the Federal High Court addresses the FIRS clearance requirements explicitly. Where relief is critical to deal economics, a pre-transaction ruling or advance clearance from the FIRS should be sought early in the deal timeline.

Cross-Border Holding Company Traps

Foreign private equity sponsors frequently acquire Nigerian targets through intermediate holding companies in jurisdictions with favourable treaty networks. The 2026 reforms, combined with Nigeria’s ongoing implementation of BEPS recommendations, have increased the risk that these structures will be challenged. The general anti-avoidance provisions in the TA Act give the FIRS broad authority to disregard arrangements that lack commercial substance or that have been entered into primarily to obtain a tax benefit. Buyers structuring acquisitions through offshore vehicles must ensure that the holding company has genuine economic substance, real employees, decision-making authority, and a business purpose beyond tax efficiency.

Sectors with significant foreign investment, including petroleum and energy and fintech, are likely to attract early enforcement attention.

Expanded Tax Due Diligence: Scope, New Documents and Red Flags

Tax due diligence Nigeria exercises must be materially expanded under the 2026 framework. The old-regime checklist, which focused primarily on CIT returns, WHT compliance and outstanding assessments, is no longer sufficient. The following workstreams should now be treated as mandatory for every acquisition.

Pre-Closing Tests and Scope Expansion

• E-filing compliance verification. Obtain evidence that the target has filed all returns electronically through the FIRS portal for the current and prior periods. Any gap in e-filing history is a red flag that may indicate broader non-compliance and exposes the buyer to penalties under the TA Act.
• VAT exemption audit. Where the target has claimed VAT exemptions, particularly TOGC exemptions on prior asset acquisitions, verify that the conditions were satisfied. The narrowed exemption rules mean that historic claims may now be vulnerable to FIRS challenge.
• CGT exposure mapping. Identify all assets held by the target that could give rise to CGT on a future disposal, including shares in subsidiaries, real property and intangible assets. Map the tax basis of each material asset and assess the latent gain.
• Transfer pricing documentation. Review the target’s transfer pricing policy and documentation for related-party transactions. Under the 2026 rules, inadequate documentation creates a presumption that the FIRS may recharacterise transactions, resulting in additional assessments and penalties.
• Stamp duty audit. Confirm that all historical transaction documents, particularly share purchase agreements, loan agreements and leases, have been properly stamped. Recent tribunal decisions have clarified that SPAs are stampable instruments, and unstamped documents are inadmissible in evidence and may attract penalties.
• WHT compliance review. Verify that the target has deducted and remitted withholding tax on all payments to contractors, service providers and related parties. WHT non-compliance is one of the most common findings in Nigerian tax due diligence exercises and can result in the buyer inheriting assessments plus interest and penalties.

Tax Disputes and Liabilities

Request a complete schedule of all pending tax assessments, audits, objections and appeals. Under the TA Act, the FIRS has extended limitation periods and can reopen assessments where there is evidence of fraud or wilful neglect. Buyers should obtain certified copies of all correspondence with the FIRS and state tax authorities and engage independent tax counsel to evaluate the quantum of contingent liabilities.

Sample Document Request List

• CIT. Filed returns and computations for the last six years; all assessment notices; objection letters and outcomes; e-filing confirmation receipts.
• VAT. Monthly returns; exemption certificates; TOGC documentation; input VAT credit schedules.
• CGT. Asset registers with cost basis and disposal records; prior CGT computations and payments.
• WHT. Remittance schedules; credit notes issued; compliance certificates.
• Transfer pricing. TP policy; local and master file documentation; country-by-country reports; advance pricing agreements.
• Stamp duty. Evidence of stamping for all material contracts executed in the last six years.
• E-filing. Platform access logs and submission confirmations from the FIRS e-filing system.
• Disputes. Full schedule of pending assessments, appeals before the Tax Appeal Tribunal and any Federal High Court proceedings.

Companies subject to local content requirements or operating in regulated sectors such as telecommunications should anticipate additional regulatory-specific tax exposures that must be covered in due diligence.

Drafting Contractual Protections: Warranties, Indemnities, Escrows and Price Adjustments

The expanded risk landscape under the 2026 reforms demands correspondingly robust contractual protections. Standard-form tax provisions that were adequate under the prior regime are unlikely to provide sufficient coverage.

Tax Warranties and Representations

Tax warranties should be drafted with specificity rather than relying on generic formulations. At a minimum, the seller should warrant:

• All tax returns (including e-filed returns) have been filed on time and are accurate in all material respects.
• All taxes shown as due on filed returns have been paid.
• The target has complied with all mandatory e-filing requirements under the TA Act from the date of its enactment.
• All VAT exemptions claimed have been properly supported and the conditions for each exemption have been fully satisfied.
• There are no pending or threatened tax assessments, audits or investigations, and no circumstances exist that could give rise to such.
• All transaction documents have been stamped in accordance with the Stamp Duties Act as amended.
• All related-party transactions have been conducted at arm’s length and are supported by compliant transfer pricing documentation.

The importance of disclosure letters in qualifying these warranties cannot be overstated. Buyers should require detailed disclosure against each tax warranty and treat inadequate disclosure as a basis for price adjustment or walk-away.

Tax Indemnity

A standalone tax indemnity, separate from the general indemnity, should cover all tax liabilities attributable to pre-closing periods, including any liability arising from a FIRS reassessment, recharacterisation of related-party transactions or denial of previously claimed exemptions. The indemnity should be drafted on a pound-for-pound basis (not subject to the general indemnity cap) and should survive for a period at least equal to the FIRS statute of limitations, plus a reasonable buffer for assessment and appeal.

Survival and Limitation

Given the TA Act’s extended assessment periods and the FIRS’s increased audit activity, tax warranty and indemnity survival periods should be set at a minimum of seven years from closing. This exceeds the typical survival period for general warranties (usually 18–24 months) but reflects the genuine enforcement risk under the reformed regime.

Escrow and Holdbacks

Where tax due diligence reveals specific contingent liabilities, for example, a pending FIRS audit or a disputed assessment under appeal, buyers should insist on a ring-fenced escrow or holdback from the purchase price. The escrow amount should reflect the best estimate of the maximum exposure (including penalties and interest) plus a margin for legal costs. Release conditions should be tied to final resolution of the relevant tax matter, including exhaustion of all appeal rights.

As a worked example: if the target has an outstanding FIRS assessment of ₦500 million that is under objection, and the buyer’s tax advisers assess the realistic exposure (including penalties and interest) at ₦350 million, a prudent escrow would be set at ₦400–450 million, with staged release as milestones in the dispute resolution process are reached.

Post-Deal Integration and Compliance Checklist

Closing the transaction is only the beginning of the compliance journey. Mandatory e-filing Nigeria requirements and the TA Act’s enhanced enforcement framework mean that buyers must act quickly to bring the target into full compliance with the new regime. The following table summarises key post-closing obligations by transaction type.

Buyers should appoint a dedicated integration workstream lead responsible for tax compliance within the first 30 days of closing. Failure to address e-filing gaps or registration updates promptly can result in automatic penalties under the TA Act, creating unnecessary liability from day one of ownership.

Cross-Border Planning: Withholding, Repatriation and Treaty Issues for Foreign Investors

Cross-border M&A Nigeria transactions involve an additional layer of complexity. Foreign investors must navigate withholding tax obligations, treaty relief applications and substance requirements that have been tightened under the 2026 reforms.

Withholding Tax Matrix

Nigeria imposes WHT on a range of cross-border payments. The domestic rates (before treaty relief) are as follows for payments to non-residents:

• Dividends: 10%
• Interest: 10%
• Royalties: 10%
• Management and technical fees: 10%

Where a double taxation treaty (DTT) is in force between Nigeria and the investor’s home jurisdiction, reduced rates may be available. However, the FIRS has become increasingly rigorous in scrutinising treaty relief claims, requiring proof of beneficial ownership, tax residency certificates and evidence that the recipient is not a conduit arrangement.

Repatriation Options

Post-acquisition, foreign buyers typically repatriate returns through dividends, management fees, interest on shareholder loans or royalty payments. Each channel has a distinct WHT profile and transfer pricing risk. Deal teams should model the after-tax cost of each repatriation route and document the commercial rationale for the chosen structure to withstand FIRS scrutiny. The oil and gas sector has historically attracted heightened attention on repatriation structures, and early indications suggest the FIRS will extend similar scrutiny to technology and financial services transactions.

BEPS and Substance Requirements

Nigeria has committed to the OECD/G20 Inclusive Framework and is progressively implementing BEPS recommendations. The 2026 reforms reinforce this direction by empowering the FIRS to deny treaty benefits where an arrangement lacks economic substance or is part of a principal-purpose test failure. Foreign acquirers structuring through intermediate jurisdictions must ensure that the holding entity maintains genuine substance, real employees, physical premises, independent decision-making authority and a demonstrable business rationale beyond tax minimisation.

Conclusion

Nigeria’s 2026 tax reform package represents the most significant overhaul of the M&A tax landscape in a generation. For deal teams, the message is straightforward: expand your tax due diligence scope, stress-test your deal structure against the new rules, and insist on contractual protections calibrated to the reformed enforcement environment. M&A tax in Nigeria is no longer a back-office compliance matter, it is a front-of-deal commercial issue that can determine whether a transaction creates or destroys value. Engaging experienced Nigerian corporate counsel at the earliest stage of any transaction is the most effective way to navigate the new regime with confidence.

Sources

1. Nigeria Tax Administration / NALTF, Understanding the New Tax Law: Key Changes and Implications
2. Federal Inland Revenue Service (FIRS), Official Portal
3. Olaniwun Ajayi LP, How Tax Reforms Affect M&A Transactions in Nigeria
4. Templars, The Taxation of M&A Transactions in Nigeria: What Has Changed
5. Chambers Practice Guides, Corporate M&A 2026: Nigeria Trends and Developments
6. Forvis Mazars Nigeria, Tax Considerations