Nigeria's Tax Institutions in Flux: The Ombud's Trust Warning, a New Interest-Rate Order, and a Tribunal's Nuanced Ruling

Nigeria's first Tax Ombudsman, Dr John Nwabueze, delivered a warning about the direction of the country's tax reforms — but it is worth being precise about the occasion. Coverage from Nairametrics and BusinessDay both report on the same single event: the 36th Anniversary Conference of the Finance Correspondents Association of Nigeria (FICAN), held in Lagos over the weekend of 19–20 September 2026, themed "Building on the Gains of Recapitalisation, Tax Reforms, and Fintech Revolution." Nwabueze did not deliver the speech personally — it was read on his behalf, though the two outlets disagree on exactly who did so: Nairametrics names his "Chief of Staff, Dr. Peter Iwegbu," while BusinessDay names "Peter Ugwuegbu." We were unable to reconcile this discrepancy and note it as such.

The substance of the warning is consistent and clear across both reports. Nwabueze argued that Nigeria cannot build a sustainable tax system by focusing only on what citizens and businesses are required to pay — the system also needs to earn taxpayers' trust in how it operates. In his words: "Nigerians cannot build a sustainable revenue and tax system by focussing only on what the citizens and business must pay. We must also focus on why they should trust the system through which they pay." He was explicit that revenue growth and taxpayer confidence should reinforce, not oppose, each other when the system is properly administered, and cautioned that legislation and enforcement alone cannot deliver sustainable revenue growth.

He grounded this in a specific statistic: Nigeria's tax-to-GDP ratio stood at 8.2% in 2023, according to OECD data he cited, compared with an average of 16.1% across 38 African countries — a gap he used to argue that revenue-focused reform alone, without addressing the trust deficit, has clear limits. He illustrated the point with a concrete example: a market trader in Ilorin who questioned how tax reform benefits her when she still faces multiple informal levies from different officials despite having already paid.

Nwabueze was careful to frame the Office's purpose narrowly and specifically: it exists "neither to encourage tax resistance nor to undermine lawful tax administration, but to provide a credible avenue for legitimate grievances to be considered and resolved." Its jurisdiction, per BusinessDay's report, covers "taxes, levies, regulatory fees and charges, customs duties and excise matters" — a broad remit spanning far beyond just federal income tax disputes.

The Office's early caseload data is itself revealing. In its first three months of operation, it received more than 20 genuine complaints — and, notably, most concerned state-level revenue services rather than federal taxes. This matters practically: it suggests the most immediate friction taxpayers are experiencing sits with state and local revenue collection, not primarily with the NRS itself, and positions the Ombud's office as a genuinely useful, low-cost channel specifically for state-level tax disputes. Finance Minister Oyedele had formally unveiled the Office's digital case-management portal, website, and toll-free call centre earlier in 2026 to make this channel accessible.

A separate, related digitalisation point Nwabueze raised: roughly 67 million Bank Verification Number (BVN) holders are already captured in Nigeria's formal tax net through the growing digital identity infrastructure, and he stressed that collaboration between banks, fintechs, and regulators is essential to ensure this expanded reach translates into fairer — not merely more efficient — tax administration. He specifically urged financial journalists to explain the practical difference between lawful tax planning and tax evasion, investigate how administrative complaints are actually handled, and report on whether tax revenue visibly translates into public services — a direct challenge to move reform coverage beyond simply reporting policy announcements.

This is a substantive regulatory change in its own right, not merely context for a revenue-collection statistic. Minister Oyedele has issued the Nigeria Tax Administration (Interest on Late Payment of Tax) Order, 2026, made under section 65 of the NTAA 2025, replacing the previous flat five-percentage-point interest margin on late tax payments with a market-linked formula, effective 1 October 2026.

The mechanics are precise. For tax payable in naira, interest will be charged at the Central Bank of Nigeria's Monetary Policy Rate (MPR) plus one percentage point — with a floor: the applicable rate cannot fall below the yield on 364-day Treasury Bills. For tax payable in foreign currency, the rate is the Secured Overnight Financing Rate (SOFR) — the benchmark US dollar interest rate — plus six percentage points, with an official successor rate to apply automatically should SOFR itself ever be discontinued. The NRS is required to publish the applicable rate on its website by the third business day of every month, and interest is calculated as simple interest, accruing daily from the date tax becomes due until it is actually paid. The new regime applies uniformly across the NRS, State Internal Revenue Services, and the FCT Internal Revenue Service.

Oyedele's own stated rationale is worth quoting directly, since it explains the policy logic precisely: "Tax that is due belongs to the public. When it is paid late, the government may have to borrow to fill the gap, and the cost falls on everyone. This Order ties the cost of late payment to real market rates, so that delaying tax does not become a cheaper form of credit than the market itself." He added a separate point about predictability: "Just as important is certainty. Every taxpayer, whether dealing with the Nigeria Revenue Service or a State revenue service, will know the rate in advance, see it published monthly, and be charged the same way. Clear rules make compliance easier and support a fair, predictable tax system."

Two details are easy to miss and worth stating explicitly. First, this Order changes interest only — it does not abolish the separate 10% late-payment penalty that still applies under section 65 of the Act; both the market-linked interest and the flat 10% penalty can apply to the same late payment. Second, tax authorities retain discretion under section 66 to waive interest or penalties where good cause is established — this Order does not remove that flexibility. On timing, the new rates apply to interest arising from 1 October 2026 onward, including interest on tax liabilities that became due before that date — but interest that had already accrued before 1 October remains governed by the rules in force when it arose. The Order formally supersedes a 2017 notice and other earlier notices on the same subject.

On 10 September 2026, a five-member panel of the Tax Appeal Tribunal in Abuja — Chief Moremi Soyinka-Onijala, Anthony Amoman, Dr Chukwudi Ezeudeka, Dr Gbenga Falana, and Amina Ibrahim — delivered judgment in TAT/ABJ/332/2023, an appeal brought by the Cement Technology Institute of Nigeria (CTIN) against additional Companies Income Tax, Tertiary Education Tax, and withholding tax assessments covering the 2018–2020 years of assessment (and 2017–2019 years of account). CTIN had filed the appeal in September 2023, disputing the original FIRS (now NRS) assessment.

The outcome, once you look past the ₦2 billion headline figure, was not a simple win for the tax authority. The Tribunal did not simply uphold the original assessment — it recomputed it, and in doing so, granted CTIN relief on two specific technical points. First, the Tribunal accepted CTIN's argument that management fees it paid to the Bank of Industry were a deductible expense, and allowed those fees to be deducted from CTIN's interest income in recalculating its assessable profit — a direct win for the taxpayer on that specific issue. Second, the Tribunal held that the Bank of Industry was itself required, under the Companies Income Tax Act, to have deducted 10% withholding tax at source from the interest income paid to CTIN and remitted it to the tax authority — and gave CTIN due credit for that withholding tax in calculating its final liability. Separately, the Tribunal ordered the tax authority to recompute the assessment within 30 days to properly reflect an exemption for interest income specifically traceable to Federal Government Treasury Bills and Bonds, under the Companies Income Tax (Exemption of Bonds and Short-Term Government Securities) Order, 2011 — another point on which CTIN's position was accepted.

After all of this recalculation, the Tribunal still found a substantial net liability: Companies Income Tax of ₦1,835,484,959.69 and Tertiary Education Tax of ₦190,158,410.44 — a combined figure of roughly ₦2.03 billion, which is where the "₦2 billion" headline comes from. The appeal was formally "dismissed," in the sense that CTIN did not escape liability altogether, but the ruling is more accurately described as a recomputation that partially vindicated the taxpayer's technical arguments while still confirming a large underlying liability, rather than the tax authority's original assessment being enforced as originally issued.

The broader significance for other taxpayers: this case illustrates the Tribunal actively scrutinising and adjusting NRS/FIRS assessments on technical merits, including correctly applying withholding tax credit rules and a specific bond-interest exemption, rather than functioning as a rubber stamp for whatever figure the tax authority originally assessed. Any organisation with a live dispute involving similar issues (deductibility of financing-related fees, treatment of government securities interest, or withholding tax credit disputes) has a directly relevant precedent to reference.

Separately, the Joint Revenue Board disclosed in July 2026 that 16 of Nigeria's 36 states had adopted a harmonised Taxes and Levies framework specifically designed to eliminate multiple taxation, the practice of different authorities imposing overlapping or duplicative levies on the same taxpayer or transaction. The remaining 20 states have not yet adopted the framework. This is a genuinely material practical point for any business operating across multiple Nigerian states: multiple-taxation exposure currently depends materially on which specific states a business operates in, since harmonisation is roughly halfway complete rather than nationwide.

On Thursday, 24 September 2026, the Nigeria Revenue Service unveiled a new tagline, "Inspiring Trust, Sustaining Growth" — at a ceremony in Abuja, explicitly framed as part of its ongoing transformation from a narrowly tax-focused agency into a broader revenue administration institution. Tayo Koleosho, Chief of Staff to the NRS's Executive Chairman (Dr Zacch Adedeji), said the new identity was designed to build confidence in Nigeria's revenue administration system, stressing that taxpayers need confidence their data will be protected, assessments will be fair, and dealings with the authority will be handled professionally. Alfred Okoh, the NRS's Group Director for Transformation and Strategy, said the new tagline reflects the Service's genuinely expanded legal mandate: "We're now a new revenue administration, and we're not just talking taxes. So there are non-tax revenues that we are also accounting for," signalling the NRS's role now extends beyond traditional tax collection to encompass non-tax federal revenue streams as well. The rebranding is explicitly tied to the Federal Government's ambition of growing the Nigerian economy to $1 trillion by 2030 — an objective NRS officials say cannot be achieved without public confidence in the institutions and systems underpinning it.

The Revenue Numbers Behind the Institutional Push

The NRS reported collecting ₦21.6 trillion in the first half of 2026, a 49% increase on the equivalent period in 2025 — a figure the government attributes to the ongoing tax reforms and increased digitalisation of revenue administration. Given this scale of increase, and the government's parallel six-week review of implementation gaps in the 2025 reforms (detailed in a separate Briefly analysis), enforcement activity is reasonably expected to remain aggressive even as the Tax Ombud pushes publicly for a more trust-centred approach — these two pressures (rising collection and a stated trust deficit) are, on the government's own account, meant to reinforce rather than work against each other, though whether that holds in practice remains to be seen.

Who must act, and what specifically changes: Every taxpayer with an outstanding liability should understand the new interest mechanics taking effect 1 October 2026, since they change the actual cost of paying late — a market-linked, monthly-published rate rather than a fixed margin, with the separate 10% penalty still applying on top. Businesses operating in multiple Nigerian states should confirm which of the 36 states have adopted the harmonised Taxes and Levies framework before assuming multiple-taxation protections apply uniformly nationwide.

Financial and operational exposure: Organisations with disputed historic Companies Income Tax, Education Tax, or withholding tax assessments should note the Tax Appeal Tribunal's demonstrated willingness to recompute — not simply rubber-stamp — NRS assessments on specific technical grounds, including deductibility of financing-related fees and government-securities interest exemptions; this is directly relevant precedent for structuring a similar appeal. Taxpayers whose primary friction is with a state-level revenue authority, rather than the NRS itself, have a genuinely accessible, low-cost channel in the Tax Ombud's office, which has already handled complaints of exactly this kind in its first three months.

Realistic timeline: The new interest-rate Order takes effect 1 October 2026, a matter of days from most readings of this analysis. No other item here carries a forward compliance deadline — the Tribunal ruling, the NRS rebrand, and the Tax Ombud's remarks are all already-completed developments to be aware of rather than upcoming deadlines.

What remains uncertain or pending: Whether the discrepancy over who delivered Nwabueze's FICAN remarks (Iwegbu or Ugwuegbu) reflects two different individuals or a reporting error is unresolved. Whether the remaining 20 states will adopt the harmonised Taxes and Levies framework, and on what timeline, was not stated in available sourcing. Whether the CTIN ruling will be appealed further was not addressed in available reporting.

Did Nigeria's Tax Ombud give two separate public warnings in one week? Based on available sourcing, no — both reports trace to the same single event, the FICAN 36th Anniversary Conference in Lagos over the weekend of 19–20 September 2026, with Nwabueze's remarks delivered on his behalf by a representative (sources disagree on the exact name).

How is late-payment tax interest calculated in Nigeria from October 2026? For naira-denominated tax, at the CBN's Monetary Policy Rate plus one percentage point, with a floor equal to the 364-day Treasury Bill yield. For foreign-currency tax, at SOFR plus six percentage points. The rate is published monthly by the NRS and applied as simple daily interest from the due date until payment.

Does the new interest Order replace the 10% late-payment penalty? No. The 10% penalty under section 65 of the NTAA 2025 remains separate and still applies; the Order changes only the interest calculation, not the penalty.

Did the Tax Appeal Tribunal simply enforce the NRS's original assessment against the Cement Technology Institute of Nigeria? Not exactly. The Tribunal recomputed the assessment, accepting the Institute's arguments on two specific points — deductibility of Bank of Industry management fees and a Treasury Bill/Bond interest exemption — while still confirming a substantial combined liability of roughly ₦2.03 billion in Companies Income Tax and Tertiary Education Tax.

Have all Nigerian states eliminated multiple taxation? No. As of July 2026, only 16 of Nigeria's 36 states had adopted the Joint Revenue Board's harmonised Taxes and Levies framework; multiple-taxation risk for a business depends significantly on which states it operates in.

What does the NRS's new tagline actually signal? Per NRS officials, it reflects the Service's shift from a narrowly tax-focused agency to a broader revenue administration body that also accounts for non-tax federal revenues, tied to the government's ambition of a $1 trillion Nigerian economy by 2030.