Nigeria’s Federal Inland Revenue Service (FIRS) has announced that the National Identification Number (NIN) issued by the National Identity Management Commission (NIMC) will automatically serve as the Tax Identification Number (Tax ID) for all Nigerian citizens. At the same time, registered businesses will use their Corporate Affairs Commission (CAC) registration numbers.
The disclosure was made during a public awareness campaign on the new tax laws posted on the X social media platform.
According to the Service, the Nigeria Tax Administration Act (NTAA), which comes into force in January 2026, mandates the use of Tax IDs for certain financial and commercial transactions, including bank account ownership.
FIRS explained that the measure is part of efforts to unify all previously issued Tax Identification Numbers (TINs) by both the federal and state revenue services into a single identifier.
“For individuals, your NIN automatically serves as your Tax ID, while for registered companies, your CAC RC number is used. You do not need a physical card; the Tax ID is a unique number linked directly to your identity,” the Service stated.
The agency noted that the requirement has been in place since the Finance Act of 2019 but has now been strengthened under the NTAA to ensure compliance and ease of administration.
Officials emphasized that the reform would simplify tax processes, reduce duplication, and improve transparency in Nigeria’s tax system.
The FIRS added that the integration of NIN and CAC numbers into the tax framework would also enhance data accuracy, curb tax evasion, and streamline the monitoring of taxable activities across the country.
Tax experts have described the development as a significant step toward modernising Nigeria’s revenue administration, noting that it aligns with global best practices where national identity systems are linked to tax compliance.
The revenue service urged Nigerians to ensure that their NINs and CAC registration details are up-to-date, stressing that the identifiers would be required for transactions such as property purchases, contract awards, and access to certain financial services once the NTAA takes effect.
