Nigeria’s new tax law will come into effect on January 1, 2026, and there will be no turning back

The Abuja High Court has cleared the way for Nigeria’s new tax regime scheduled to begin on January 1, 2026, dismissing a lawsuit seeking to halt its implementation.

The ruling provides the federal government, the Federal Inland Revenue Service (FIRS) and the National Assembly with comprehensive legal support to facilitate the implementation of the new tax law.

The suit was filed by the Joint Trustees of the African Public Trustee Abuse Initiative, which brought together the President of the Federal Republic of Nigeria, the Attorney General of the Federation, the President of the Senate, The Speaker of the House of Representatives and the Speaker of the National Assembly have taken to court over alleged discrepancies in recently enacted tax laws.

The plaintiffs, in an ex-parte motion, seek an interim injunction restraining the federal government, FIRS, the National Assembly and relevant agencies from implementing or enforcing the provisions of the Nigeria Taxation Code, 2025; the Nigeria Tax Administration Act, 2025; the Nigeria Revenue Service (Establishment) Act, 2025; and the Nigeria Joint Board of Taxation (Establishment) Act, 2025, pending the determination of the substantive proceedings.

The group also asked the court to restrain the president from enforcing the law in any part of the federation before hearing its notice motion.

However, In a ruling handed down on Tuesday, Justice Kawu dismissed the application, finding it lacked merit and failed to establish sufficient legal basis to warrant the relief sought.

The court ruled that the plaintiffs had not shown how the implementation of the new tax law would cause irreparable harm or violate any provision of the Constitution, emphasizing that issues of fiscal policy and economic reform were entirely within the purview of the government.

Justice Kawu further held that once the law is formally enacted and gazetted, any alleged errors or disputes can only be resolved through legislative amendments or substantive court orders, noting that disagreements over tax laws cannot prevent the implementation of existing laws.

Therefore, the court confirmed that there are no legal obstacles to the implementation of the new tax regime and directed that it be implemented as planned from January 1, 2026.

The new tax system is based on four landmark tax reform bills, which will be signed into law in 2025 as part of the federal government’s wider fiscal and economic reform agenda to increase revenue, simplify the tax system and reduce tax evasion.

The laws – the Nigeria Revenue Code 2025, the Nigeria Tax Administration Act 2025, the Nigeria Revenue Service (Agency) Act 2025 and the Nigeria Joint Board of Taxation (Agency) Act 2025 – consolidate and replace a number of existing tax regulations, including those governing corporate income tax, personal income tax, value added tax, capital gains tax and stamp duty.

Key elements of the reform include unifying multiple taxes into a more streamlined framework, broadening the tax base, protecting low-income earners and small businesses, and introducing modern, technology-driven tax administration systems such as digital filing and electronic compliance monitoring.

The reforms also provide for the reorganization of federal tax administration, including the establishment of the Nigeria Revenue Service, to enhance efficiency, coordination and tax collection at all levels of government.

Although the federal government said the reforms were crucial to stabilizing public finances and funding infrastructure and social services, the laws sparked intense public debate, with some civil society groups and political actors claiming discrepancies between the version adopted by the National Assembly and the version later published.

The concerns sparked calls for a moratorium, re-gazetting and legal action, which was ultimately dismissed by the Abuja High Court.
Reacting to Tuesday’s judgment, stakeholders described the ruling as a major impetus for reforms, saying it removed all legal obstacles that could have delayed the implementation of the new tax framework.