Introduction
The Nigeria Tax Act, 2025 (NTA 2025) introduces important procedural and institutional changes to the manner in which tax disputes are initiated, reviewed, and resolved. While much attention has focused on expanded taxing powers and compliance obligations, the Act also reshapes the dispute resolution landscape by strengthening administrative objection procedures and reinforcing specialised dispute resolution channels.
For businesses, tax disputes are no longer limited to post-assessment litigation. The new framework emphasises structured objection procedures, administrative review, and specialised adjudication before escalation to the courts. This reflects a broader shift toward efficiency, early resolution, and technical expertise in tax dispute management.
The NTA 2025, therefore, compels taxpayers to adopt a more strategic approach when challenging tax assessments. Timelines are stricter, documentation requirements are more detailed, and failure to follow procedural steps may result in assessments becoming final and enforceable.
This article examines dispute resolution under the new tax framework, focusing on the objection process, the role of the Tax Appeal Tribunal, and the Office of the Tax Ombudsman as an additional channel for ventilating tax grievances. It argues that the most significant development lies in the institutionalisation of structured dispute resolution mechanisms before litigation.
Dispute Resolution through the Lens of the Nigeria Tax Act, 2025
The NTA 2025 reinforces the principle that tax disputes must follow a structured administrative process before judicial intervention. Upon receiving a tax assessment, a taxpayer is required to file a formal objection within the prescribed timeline, stating the grounds of disagreement and providing supporting documentation.
Failure to object within the stipulated period may result in the assessment becoming final and conclusive. This position has been consistently affirmed in FIRS v. Nigeria Services & Supply Ltd, where the Tribunal held that a tax assessment not challenged within the statutory period becomes binding and enforceable. This underscores the importance of prompt action when disputing tax liabilities.
The new framework also emphasizes documentation at the objection stage. Taxpayers are expected to provide accounting records, transaction agreements, and tax computations supporting their position. The importance of adequate documentation in disputing assessments was reinforced in Cadbury Nigeria Plc v. Federal Inland Revenue Service, where the Tax Appeal Tribunal examined additional assessments raised by the tax authority and emphasised that taxpayers are entitled to challenge such assessments with proper supporting evidence.
Additionally, the courts have consistently emphasised strict adherence to statutory dispute procedures. In Mobil Producing Nigeria Unlimited v. Lagos State Board of Internal Revenue, the court held that tax disputes must be resolved within the statutory framework, and that parties must comply with objection and appeal procedures before seeking judicial intervention.
Under the NTA 2025, tax authorities are expected to review objections and issue decisions within defined timelines. Where disagreement persists, taxpayers may escalate the dispute to the Tax Appeal Tribunal. This structured progression reinforces procedural discipline and reduces premature litigation.
The NTA 2025, therefore, transforms tax dispute resolution from an ad hoc process into a staged framework involving objection, administrative review, tribunal adjudication, and judicial appeal.
The Tax Appeal Tribunal as a Primary Dispute Resolution Forum
The Tax Appeal Tribunal continues to serve as the specialised forum for resolving tax disputes between taxpayers and tax authorities. The NTA 2025 reinforces the Tribunal’s role as the primary adjudicatory body before matters proceed to the Federal High Court.
The importance of the Tribunal’s jurisdiction was affirmed in Federal Inland Revenue Service v. TSKJ II Construcciones International SA, where the Court of Appeal confirmed that the Tax Appeal Tribunal is the proper first forum for determining tax disputes arising from assessments. The decision reinforced the Tribunal’s role as a specialised body for resolving technical tax issues before escalation to the courts.
The Tribunal also plays a critical role in reviewing the basis of tax assessments. In Cadbury Nigeria Plc v. Federal Inland Revenue Service, the Tribunal examined transfer pricing adjustments imposed by the tax authority and emphasised the need for proper justification and documentation. The decision illustrates the Tribunal’s technical function in reviewing complex tax assessments.
Under the NTA 2025, the Tribunal’s role becomes increasingly significant due to expanded tax assessments arising from cross-border transactions, transfer pricing adjustments, and compliance enforcement. Taxpayers are therefore expected to prepare technically sound arguments supported by documentary evidence when approaching the Tribunal.
The Tribunal process typically involves filing a notice of appeal, exchange of pleadings, presentation of documentary evidence, and oral arguments. Decisions of the Tribunal may be appealed to the Federal High Court on points of law.
The strengthened role of the Tribunal reflects a policy preference for specialised adjudication before resort to traditional court litigation.
The Office of the Tax Ombudsman as a New Channel for Tax Grievances
A notable development within the evolving tax dispute framework is the growing recognition of the Tax Ombudsman as an administrative channel for resolving taxpayer grievances. The Ombudsman provides an avenue for addressing complaints relating to administrative conduct, procedural delays, and unfair tax enforcement actions.
Unlike the Tax Appeal Tribunal, which determines substantive tax liability, the Tax Ombudsman focuses on fairness, transparency, and administrative accountability. This includes complaints relating to delayed assessments, refusal to process objections, excessive enforcement actions, and procedural irregularities.
The availability of this mechanism aligns with global best practices aimed at improving taxpayer confidence and reducing adversarial dispute resolution. It allows taxpayers to seek administrative intervention without immediately commencing formal litigation.
The Ombudsman, therefore, complements the Tribunal process by providing an early intervention channel where disputes relate to administrative conduct rather than substantive tax liability. This may help resolve disputes more efficiently and reduce litigation costs.
Businesses may consider engaging the Tax Ombudsman where disputes involve procedural concerns, enforcement conduct, or delays in resolving objections.
Practical Considerations When Disputing Tax Assessments
In navigating tax disputes under the NTA 2025, businesses should prioritise:
i. Reviewing tax assessments immediately upon receipt
ii. Filing objections within statutory timelines
iii. Providing detailed supporting documentation
iv. Maintaining consistent accounting and tax records
v. Engaging technical tax and legal advisors early
vi. Evaluating whether to approach the Tax Ombudsman
vii. Preparing thoroughly for Tribunal proceedings
These steps are essential to prevent assessments from becoming final and to ensure disputes are resolved effectively.
Conclusion
The Nigeria Tax Act, 2025, reshapes the dispute resolution landscape by emphasising structured objection procedures, specialised adjudication, and administrative accountability. The framework strengthens the role of the Tax Appeal Tribunal while introducing additional avenues, such as the Tax Ombudsman for resolving taxpayer grievances.
Judicial authorities consistently emphasise strict compliance with statutory timelines and procedures. Decisions such as FIRS v. Nigeria Services & Supply Ltd, Cadbury Nigeria Plc v. FIRS, Mobil Producing Nigeria Unlimited v. Lagos State Board of Internal Revenue, and FIRS v. TSKJ II Construcciones International SA reinforce the importance of prompt objection, proper documentation, and technical preparation in tax disputes.
For businesses, disputing tax assessments is no longer merely reactive. It is a structured process requiring early engagement, detailed documentation, and strategic use of available dispute resolution channels.
In the evolving Nigerian tax environment, understanding the dispute resolution framework is essential. Timely action, procedural compliance, and informed strategy will increasingly determine the outcome of tax disputes and the financial exposure of businesses.
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