The Federal Government of Nigeria has released comprehensive guidelines for the implementation of the Tax Acts 2025, setting the stage for a major tax system overhaul effective January 1, 2026. The guidelines, unveiled in Abuja on Thursday, June 18, 2026, by the Ministry of Finance, aim to provide operational clarity for tax authorities, practitioners, and taxpayers during the transition period.
Old Tax Laws Apply for Pre-2026 Periods
According to the official document, tax returns for periods ending on or before December 31, 2025, will continue to be processed under the existing legislation. Conversely, all returns due on or after January 1, 2026, will fall under the new tax regime established by the Tax Acts 2025. This ensures that no taxpayer is subjected to retrospective application of the new laws.
The guidelines explicitly state: “Tax liabilities, assessments, audits, investigations, disputes and enforcement actions relating to periods before that date will be treated under the repealed tax laws.” This provision is designed to offer certainty and prevent legal conflicts during the transition.
Scope of the New Tax Acts 2025
The Tax Acts 2025 comprise four key pieces of legislation: the Nigeria Revenue Service (Establishment) Act, the Nigeria Tax Act 2025, the Nigeria Tax Administration Act 2025, and the Joint Revenue Board (Establishment) Act. Each act will come into effect from its respective commencement date, with the Nigeria Tax Act specifically starting on January 1, 2026.
The new framework will apply to a wide range of tax matters, including income taxes, transaction taxes, development levies, tax incentives, exemptions, record-keeping, and transactions that span both the old and new regimes. This comprehensive approach aims to unify tax administration across federal, state, and local government levels.
Existing Tax Incentives Remain Valid
One critical clarification in the guidelines is that all existing tax incentives and exemptions granted under prior tax laws will remain valid for the duration of their respective terms. However, new applications for tax incentives, as well as pending applications, will be assessed under the new laws. This ensures that businesses currently benefiting from incentives are not disrupted while aligning future incentives with the updated tax policy.
Minister Oyedele Emphasizes Fairness and Clarity
Minister of Finance and Coordinating Minister of the Economy, Taiwo Oyedele, stated that the guidelines represent a significant milestone in Nigeria’s ongoing tax reforms. He emphasized that the transition would be seamless and that no taxpayer should fear the change, as the new laws will not apply retrospectively.
Oyedele said: “No taxpayer should fear the transition since the new laws will not apply retrospectively.” He added that the guidelines “will provide clarity and uniformity in the application of tax laws across the Nigeria Revenue Service (NIRS), various state internal revenue services, the FCT Internal Revenue Service, local government revenue committees and amongst tax practitioners and taxpayers.”
Impact on Tax Administration and Compliance
The guidelines are expected to promote a more predictable, clear, and fair tax environment, offering both certainty and administrative ease. By setting clear effective dates and transitional rules, the government aims to reduce disputes and improve compliance. The document covers operational guidance for returns submission, payment of tax liabilities, assessments, audits, and investigations, ensuring that all stakeholders are aligned.
Broader Context: Nigeria’s Tax Revenue Trends
This reform comes amid recent data from the National Bureau of Statistics (NBS) showing that Nigeria’s Company Income Tax (CIT) collections stood at N1.37 trillion in the first quarter of 2026, an 8.08% decline from the N1.49 trillion recorded in the fourth quarter of 2025. The CIT report highlighted that collections were driven by both domestic and foreign payments across key economic sectors. The new tax framework is expected to enhance revenue generation and streamline tax administration moving forward.
