Nigeria Tax Administration Act, 2025 · s.11
Company income tax returns
Every company self-assesses once a year — within six months of its accounting year end.
Who this lands on: Limited companies, including companies exempt from incorporation.
A company files a self-assessment return once a year, whether or not it owes tax.
The return carries the audited financial statements, the tax and capital allowance computations, evidence that the tax was paid, and an attestation signed by a principal officer. A small company may attach a statement of accounts attested by the taxpayer instead of audited statements.
Timing: a company in business for more than 18 months files not more than six months after its accounting year end. A newly incorporated company files within 18 months of incorporation or six months after its first accounting period, whichever comes first.
A company that permanently stops trading in Nigeria files for the year of cessation, plus anything outstanding, within six months of stopping.