Nigeria Tax Act, 2025 · NTA s.57
The 15% minimum effective rate
Very large companies must pay at least 15% of net income, whatever their reliefs.
Who this lands on: Companies in a multinational group, and any company turning over ₦50 billion or more. Not an ordinary small business.
Where a company's effective tax rate falls below 15%, it must pay additional tax to bring it up to that floor (NTA s.57).
This exists so that incentives and allowances cannot take a very large company's tax to near nothing. It has no bearing on an ordinary Nigerian SME.