The Federal Government has formally issued implementation guidelines governing the transition from Nigeria’s repealed tax laws to the Tax Acts 2025, providing long-awaited clarity for taxpayers, businesses, and revenue authorities nearly six months after the new framework took effect.
The guidelines were announced in a statement issued on Thursday by the Director of Press Relations at the Federal Ministry of Finance, Efe Ovuakporie, who described the document as setting out the process for migrating from the old tax regime to the new framework, which formally commenced on January 1, 2026.
The Tax Acts 2025 represent what is widely regarded as the most sweeping overhaul of Nigeria’s tax system in decades. The legislative package comprises four laws: the Nigeria Tax Act, the Nigeria Tax Administration Act, the Nigeria Revenue Service (Establishment) Act, and the Joint Revenue Board (Establishment) Act.
President Bola Tinubu signed the bills into law on June 26, 2025, following months of consultations between lawmakers, the executive arm, and industry stakeholders.
Notably, Thursday’s announcement of the transition guidelines came almost exactly one year after presidential assent and nearly six months after the laws themselves took effect, a gap that some commentators have noted left businesses operating in a degree of uncertainty during the early months of implementation.
According to the ministry, the document spells out how a range of transitional issues will be handled, including:
- Tax liabilities, assessments, audits, and investigations relating to periods before January 1, 2026, will continue to be treated under the repealed tax laws rather than the new framework.
- Tax returns, with filings for accounting periods ending before the commencement date, are to be submitted under the old laws, while obligations falling due from January 1, 2026, onward will be administered under the new regime.
- Disputes and enforcement actions that straddle the transition period, ensuring continuity in how pending matters are resolved.
- Incentives and exemptions, with new applications and pending requests, are now to be evaluated strictly under the provisions of the Tax Acts of 2025.
- The treatment of income taxes, transaction taxes, and development levies as the country shifts to the new structure.
Each of the four constituent laws will take effect from its own statutorily defined commencement date, the ministry clarified, with the Nigeria Tax Act becoming operational on January 1, 2026.
Speaking on the release, the Minister of Finance and Coordinating Minister of the Economy, Taiwo Oyedele, framed the guidelines as a deliberate safeguard against retroactive enforcement of the new rules.
He described the document as an essential tool for managing transitional issues while guaranteeing that obligations and disputes arising before the new laws took effect are not unfairly reassessed under the new framework.
Oyedele further characterized the reform package as a milestone in Nigeria’s broader tax modernization agenda, noting that the guidelines establish clear, predictable procedures for handling existing obligations, ongoing disputes, and future transactions alike.
The release has drawn cautious approval from tax practitioners and the business community, many of whom had pressed the ministry for clearer transitional rules in the months following the laws’ commencement.
Stakeholders say the guidelines should help promote consistent application of the new rules across the Nigeria Revenue Service, State Internal Revenue Services, the FCT Internal Revenue Service, and Local Government Revenue Committees, bodies that had previously been left to interpret aspects of the transition independently.
For businesses and individual taxpayers alike, the guidelines offer a measure of certainty after months of navigating Nigeria’s most significant tax reform in a generation without a formal transitional roadmap.
Whether the framework proves sufficient to address the full range of disputes likely to arise from the changeover remains to be seen as the Nigeria Revenue Service and state authorities begin applying it in practice.
WHAT YOU SHOULD KNOW
The new tax rules won’t apply retroactively. Anything that happened before January 1, 2026, including liabilities, audits, disputes, and pending returns, is still judged under the old, repealed laws.
Only obligations arising from that date onward fall under the Tax Acts of 2025. The guidelines exist mainly to draw that line clearly, so no one gets caught off guard by new rules being applied to old transactions.
