Nigeria Tax Self-Filing Checklist (2026)
Check items off as you go — your progress is saved in this browser only. Nothing here is submitted anywhere.
Nigeria Tax Self-Filing Checklist
If you’re a pure salaried employee, your employer already handles PAYE, pension, and NHF for you — you don’t file anything yourself (see the deadline calendar for exactly who has to file what). This checklist is for the two groups who genuinely do: self-employed individuals with non-PAYE income, filing their own Personal Income Tax self-assessment by 31 March, and small businesses handling their own CIT, Development Levy, and VAT.
Your Tax ID Changed in 2026
If the last time you thought about tax registration was a few years ago, this is worth knowing: under the Nigeria Tax Act 2025, your National Identification Number (NIN) now serves as your Tax ID for individual filing purposes, replacing the older separate TIN application process. You can verify it free in under five minutes at taxid.nrs.gov.ng using your NIN and date of birth. Companies still use their CAC registration number.
Where You Actually File
Individuals file their annual self-assessment with their State Internal Revenue Service — the one covering wherever you lived during the year you’re filing for (Lagos residents file with LIRS, for example), not with the federal Nigeria Revenue Service directly. Companies and federal officers file with the NRS. Every state now runs a digital e-Tax portal, alongside the NRS National Tax Portal — paper filing at a physical tax office is no longer how this works.
What Late Filing Actually Costs
Section 101 of the Nigeria Tax Administration Act 2025 sets the general penalty for failing to file (or knowingly filing an incomplete or inaccurate return): ₦100,000 for the first month the failure continues, and ₦50,000 for every subsequent month — on top of any interest on unpaid tax itself. This is the general rule for individuals and ordinary companies; it’s a different, much larger figure from the petroleum-sector-specific penalty some sources conflate with it.
Keep Everything for Six Years
The Act requires any book or record relevant to your filing to be kept for at least six years after the year of assessment it relates to — not a rule of thumb, a specific statutory minimum. Worth building into your own filing habit alongside the checklist above: whatever you gather to file this year, keep it, not just the return itself.
Tools to Do the Actual Math
This checklist tells you what to gather and check — for the actual calculations, use the income tax calculator, capital gains calculator, CIT calculator, VAT calculator, or the two-in-one annual tax planner, depending on what you’re filing.
Frequently Asked Questions
What is my Tax ID for filing in Nigeria in 2026?
Your NIN, for individuals — verify it at taxid.nrs.gov.ng. Companies use their CAC registration number.
What happens if I file my Nigerian tax return late?
₦100,000 for the first month, ₦50,000 for each subsequent month, under Section 101 of the NTAA 2025 — plus interest on any unpaid tax.
How long do I need to keep my tax records in Nigeria?
At least six years after the relevant year of assessment.
This checklist covers what to gather and know, not the specific screens of any one state’s e-Tax portal, which vary and change over time. Your progress is stored only in this browser’s local storage — it is not submitted to any government system or to iSabiPayment. Confirm your specific filing requirements with your State Internal Revenue Service, the NRS, or a qualified tax professional.
