The Nigeria Revenue Service (NRS) has reaffirmed July 31 as the deadline for large taxpayers to comply with the country’s National E-Invoicing and Electronic Fiscal System (EFS), warning that enforcement measures will be taken against companies that fail to meet the requirement.

The tax authority said the directive applies to large taxpayers, defined as businesses with an annual gross turnover of at least ₦5 billion, as it intensifies efforts to modernise tax administration through the electronic invoicing platform, also known as the Merchant Buyer Solution (MBS).

According to the NRS, compliance monitoring has already commenced, with firms that fail to complete the required processes facing regulatory and enforcement actions in line with existing tax laws.

To comply, affected companies are required to register on the NRS Merchant Buyer Solution platform, integrate their internal systems through approved Access Point Providers or Systems Integrators, complete validation and testing procedures, and begin transmitting invoices electronically to the NRS platform.

The agency also said businesses must accept only compliant electronic invoices bearing a valid Invoice Reference Number from their suppliers as part of the new regime.

The deadline follows a public notice issued by the NRS on Feb. 17, 2026, outlining the phased implementation of the electronic invoicing framework. The revenue service said that by the end of the first quarter of 2026, more than 1,000 companies had completed the compliance process.

The electronic invoicing system is designed to enable real-time transmission and monitoring of invoices, providing tax authorities with greater visibility into commercial transactions while supporting digital tax administration.

The July 31 deadline marks the completion of the first phase of the nationwide rollout. The NRS has outlined subsequent phases covering medium and smaller taxpayers over the next two years.

Under the implementation schedule, medium taxpayers with annual turnover ranging from ₦1 billion to ₦5 billion will begin onboarding from July 2026, while enforcement for that category is expected between January and March 2027.

Businesses with annual turnover below ₦1 billion are scheduled to join the system at a later stage, with the NRS targeting full mandatory adoption of electronic invoicing across all taxpayer categories by January 2028.

The revenue service had earlier indicated a June 30 compliance target for large taxpayers in preliminary implementation timelines. Those timelines also outlined potential sanctions for non-compliance, including fines, interest charges and restrictions on value-added tax input credit claims. The agency later confirmed July 31 as the official compliance deadline while continuing to monitor implementation.

The NRS said it remains committed to supporting taxpayers throughout the transition and has made technical assistance available to businesses implementing the new electronic invoicing requirements. It said enquiries and technical support are available through its dedicated e-invoicing portal and official support channels.