The Nigeria Revenue Service (NRS) has begun compliance monitoring for large taxpayers under the National E-Invoicing and Electronic Fiscal System, requiring companies with annual turnover of ₦5 billion and above to complete full system integration by 31 July 2026.

In an official statement issued on Friday, the NRS said entities that fail to comply could face immediate enforcement action, statutory penalties and possible operational disruptions under applicable tax laws. The tax authority also warned that failure to integrate the technology could result in the loss of value added tax (VAT) input credits, in addition to significant financial penalties.

The public notice represents a shift by the NRS from policy announcement to real-time tax enforcement. With compliance monitoring already active ahead of the July 31, 2026 deadline, the agency is seeking to establish direct digital visibility into business-to-business (B2B) transactions across the economy.

For large taxpayers, the directive requires full adoption of the national e-invoicing and Electronic Fiscal System. Companies in scope must complete all onboarding, integration and validation processes and achieve full operational compliance on or before the deadline.

The rollout is being implemented in phases. Although the NRS is beginning with large taxpayers, the new tax monitoring system is expected to extend to medium-sized firms and smaller businesses over time.

Beyond digitalisation, the NRS is also aiming to narrow Nigeria’s tax gap by reducing VAT fraud, detecting fake invoices, limiting under-reporting of sales and creating digital records of economic activity. Similar e-invoicing systems have been adopted in countries including Italy, Brazil, India, Saudi Arabia and several African countries to improve tax compliance.

How the NRS tax monitoring system could affect companies

To meet the NRS mandate and avoid regulatory sanctions, large taxpayers are expected to complete a five-step compliance framework before the 31 July 2026 deadline.

The requirements include onboarding on the NRS Merchant Buyer Solution (MBS) platform, integrating internal Enterprise Resource Planning (ERP) systems through approved Access Point Providers, and completing end-to-end data validation.

Large taxpayers must also begin live, real-time transmission of electronic invoices to the NRS e-invoicing platform. In addition, companies must ensure that all inbound B2B e-invoices received from vendors carry a valid Invoice Reference Number (IRN).

The requirements are expected to create significant operational and structural changes because invoicing sits at the centre of procurement, sales recognition, VAT accounting and audit trails. For affected companies, compliance is therefore not only a tax filing issue but also a systems, finance, procurement and vendor-management requirement.

First, the NRS will no longer have to rely only on end-of-year tax returns and audits. Every invoice issued will pass through the MBS via approved Access Point Providers. Through the IRN system, the tax authority will be able to monitor sales, margins and transaction volumes in real time.

Although the directive applies directly to large companies, small and medium-sized enterprises and smaller suppliers are also expected to feel the effects indirectly. Large corporations may freeze procurement from non-compliant vendors in order to protect their own VAT credits. As a result, small businesses that supply large enterprises may need to adopt compliant invoicing or risk being excluded from supply chains.

The fifth requirement also means large companies must accept only compliant e-invoices with valid IRNs, effectively making them part of the enforcement structure. If a vendor supplies a large company without an approved e-invoice, the corporate buyer cannot claim VAT input credits or deduct the purchase as a tax expense. Because VAT input credits are used to offset VAT charged on taxable sales, losing those credits can raise the effective tax cost of ordinary business purchases.

Second, implementation of the system gives the NRS greater visibility into business activity. In the past, a company could understate revenue until tax filing season. Under the new rule, sales become visible to the tax authority in real time, making it much harder to alter records later.

Third, compliance monitoring is expected to make the use of fake invoices more difficult. Businesses seeking to create invoices for transactions that did not occur in order to inflate expenses or claim VAT credits would face stronger controls. Invoice validation allows both sides of a transaction to be checked against the NRS central system, making such practices much harder to carry out.

The rollout also faces infrastructure-related challenges. Unreliable internet connectivity, including network outages and downtime, could threaten the real-time updating of invoices. Potential security issues, including cybersecurity risks and uncertainty over data privacy, also remain concerns. Companies affected by the deadline will need to watch for further NRS implementation guidance, especially on technical validation, approved Access Point Providers, vendor readiness and how enforcement will be applied during the transition period.