Nigeria's tax harmonisation law consolidates more than 50 separate state and local government levies into nine standardised tax heads, replacing years of overlapping, duplicate charges with one uniform structure. At the Joint Revenue Board's 160th meeting on 1–2 September 2026, officials confirmed that at least 18 state Houses of Assembly have now domesticated the reform, with the rest expected to follow through the remainder of 2026.
What Is Nigeria's Tax Harmonisation Law?
The reform runs on the Model Harmonised Taxes and Levies Law, a template statute developed under the wider Nigeria Tax Act 2025 agenda and coordinated by the Joint Revenue Board (JRB), the intergovernmental body that brings federal, state and local revenue officials together. Its job is to collapse the patchwork of taxes states and councils have historically imposed — business premises levies, signage and advertisement fees, haulage and market charges, entertainment levies and dozens of smaller collections — into nine standard tax heads that apply the same way in every state that adopts the law. Alongside the consolidation, the JRB has pushed through a uniform Personal Income Tax Guideline for PAYE administration, a Presumptive Tax Regulation giving informal-sector operators a simplified flat-rate option instead of full self-assessment, and an outright ban on cash collection and roadside or roadblock levy enforcement, long the biggest source of arbitrary, undocumented charges on businesses moving goods between states.
How Many States Have Adopted the Reform So Far?
Adoption is moving quickly but unevenly. The JRB reported 16 states had domesticated the model law by late July 2026; by its 1–2 September meeting in Kaduna, that number had risen to at least 18, with more reportedly in the legislative pipeline. Kaduna State, which hosted the September meeting, is being cited as the reform's proof of concept: Governor Uba Sani's administration says monthly internally generated revenue has grown from roughly ₦4 billion to ₦10 billion, and voluntary tax compliance has climbed from about 35% to 65% over three years, even as the number of distinct levies fell. Nationally, the JRB points to internally generated revenue rising from ₦10.1 trillion in 2023 to ₦21.6 trillion in 2024 and ₦36.8 trillion in 2025, with first-half 2026 collections already at ₦21.6 trillion, a 49% year-on-year increase, as evidence that fewer, better-enforced levies can outperform a larger number of poorly tracked ones — a trend that lines up with our recent look at Nigeria's ₦27.1 trillion tax revenue surge.
What Changed: Before vs After the Reform
- Before: a business operating across several states faced more than 50 separate state and council levies, often collected in cash at roadblocks with no uniform receipt, rate or record.
- After: the same business faces nine standard tax heads, collected through formal, trackable channels, with cash collection and roadblock enforcement explicitly banned in states that have domesticated the law.
What This Means for Your Business
Multi-state operators gain the most from this reform. If your business moves goods, staff or equipment across state lines — oil and gas logistics, construction materials, agricultural produce or shipping and freight — you have likely absorbed dozens of small, inconsistent levies at different checkpoints for years. Fewer, standardised heads mean fewer surprise charges and fewer disruptions in transit, in the same spirit as the FG's recent move to stop stamp duty deductions from contractor payments, though the benefit only applies once your operating states have actually domesticated the law.
- Map your exposure state by state. Confirm which of the states you operate in have adopted the Model Harmonised Taxes and Levies Law, since obligations still differ where a state has not yet domesticated it.
- Treat cash roadblock demands as a red flag, not routine cost. The practice is now officially prohibited in adopting states; document any such demand rather than simply paying it.
- Check presumptive tax eligibility for informal-sector partners. Outgrower schemes, artisanal subcontractors and similar informal arrangements feeding into a formal business may now qualify for simplified flat-rate assessment.
- Budget on liabilities, not on assumed savings. Harmonisation simplifies how tax is collected; it does not guarantee your total bill falls, so plan your 2026 numbers on the nine heads as they actually apply to you.
FAQ
What is Nigeria's tax harmonisation law? It is the Model Harmonised Taxes and Levies Law, coordinated by the Joint Revenue Board, which reduces the more than 50 taxes and levies previously collected separately by state and local governments to nine standard heads, applied uniformly in every state that has domesticated it.
How do I know if my state has adopted the harmonised tax law? As of the JRB's September 2026 meeting, at least 18 states have passed the model law through their Houses of Assembly, with more in progress. Confirm directly with your state's Internal Revenue Service or your tax adviser, since obligations still vary in states that have not yet domesticated the law.
Will tax harmonisation lower how much my business pays overall? Not necessarily. JRB officials have been explicit that the reform's goal is a simpler, more predictable system rather than an automatic reduction in tax owed. Consolidating levies mainly cuts the number of separate charges and eliminates informal roadside collection, rather than guaranteeing a lower total liability.
If your business operates across multiple states and you are unsure which levies still apply where you work, it is worth getting a clear picture before your next multi-state contract or supply run. VOG Global Consult provides tax advisory, compliance and assurance services for businesses across Nigeria's oil and gas, construction, agriculture, banking and shipping sectors, helping clients map their multi-state tax exposure and stay ahead of NRS and state-level compliance requirements. To book a review, contact VOG Global at Suite 060 to 061, Orago Complex, Area 10, Garki, Abuja.