How to File Company Income Tax in Nigeria on Rev360: A Step-by-Step 2026 Guide

To file Company Income Tax in Nigeria on Rev360, log in to Self-Tax Filing, update your Fixed Assets Portal, make any required MNE/CFC disclosures, complete the CIT Excel template's income statement, balance sheet and profit-adjustment sections until your balance sheet balances exactly, then upload your audited accounts and submit — all within six months of your financial year end.

Rev360 replaced TaxPro Max as the portal every Nigerian company must use for self-assessment, and CIT filing is stricter than VAT filing was under the old system: the platform enforces a 100% completion indicator, meaning it will not accept your return until the balance sheet balances to the naira. Here is exactly how the process works, and what to have ready before you start.

How do you file CIT on Rev360, step by step?

1. Clear your Fixed Assets Portal first. Update or add every asset's purchase date, category and cost, or record depreciation adjustments. Rev360 will not unlock the CIT filing template until this section is current.
2. Disclose MNE and CFC details if they apply to you. If your group's turnover crosses the statutory multinational enterprise or controlled foreign company thresholds, provide that disclosure before the CIT template becomes available.
3. Break out your revenue lines in the income statement. Expand each revenue line item individually and isolate non-taxable income, so the system does not tax income that should be excluded by default.
4. Balance your balance sheet exactly. Total assets must equal total equity plus total liabilities. Rev360's 100% completion indicator will not permit submission until this balances — a common reason filings stall in the final week.
5. Add back disallowable expenses and reconcile against VAT. Enter add-backs for fines, penalties and other disallowable items in the profit-adjustment section, then reconcile your monthly VAT records against your income statement before finalising — NRS increasingly cross-checks the two.
6. Attach your audited accounts and submit. Upload IFRS-compliant audited financial statements, your completed self-assessment form and evidence of tax payment, then submit and keep the confirmation receipt.

When is the CIT filing deadline, and what happens if you miss it?

Companies must file their CIT return within six months of their financial year end, or within 18 months of incorporation for a new company, whichever comes first. NRS may grant a written extension of up to two months if you apply before the original deadline passes. Miss it without an extension, and the cost stacks quickly:

• Late or non-filing: ₦100,000 for the first month of default, then ₦50,000 for every subsequent month
• Late payment of the tax itself: 10% of the unpaid amount, plus interest at the Central Bank of Nigeria's Monetary Policy Rate plus a spread set by the Minister

A company with a 31 December year end that files three months late — in September instead of June — owes ₦200,000 in filing penalties alone, before a naira of interest on the unpaid tax is added.

What CIT rate applies to your business?

Under the Nigeria Tax Act 2025, the rate you pay turns on size, not sector:

• Small company — turnover of ₦100 million or less and fixed assets of ₦250 million or less: 0% CIT.
• Large company — turnover above ₦100 million or fixed assets above ₦250 million: 30% CIT.
• Very large or multinational groups — turnover of ₦50 billion or more, or a global group turnover of €750 million or more: a 15% minimum effective tax rate applies on top of the standard computation.

Being classified 'small' is not the same as being exempt from filing — see our guide on Nigeria's small company tax exemption, and the same self-assessment discipline applies across both returns, since VAT filing on Rev360 sits on the same compliance backbone NRS uses to cross-check your CIT return.

What documents do you need before you start?

• Confirmed Rev360 access — migrated from TaxPro Max or freshly registered, with your Tax ID verified.
• Audited financial statements prepared under IFRS, ready to upload as evidence.
• An up-to-date Fixed Assets Portal, since the CIT template will not open until it is current.
• Your own tax computation, done independently before you touch the portal, so any system discrepancy surfaces as a question rather than a rejected filing.
• MNE/CFC disclosures, if your group turnover crosses the statutory threshold.
• One named, authorised filer on the account, so the deadline isn't left to whoever remembers it.

What does this mean for your business?

• Start the Fixed Assets Portal update at year-end close, not filing week — Rev360 will not let a stale asset register through.
• Reconcile VAT and income statement figures before you finalise. The two returns sit on the same compliance backbone, and NRS checks them against each other.
• Know your exact rate band. The difference between the small-company 0% rate and the large-company 30% rate turns on a single turnover or asset-value threshold, so confirm your figures rather than assume.
• Request an extension early if you genuinely need one. NRS will only consider it if you ask before the six-month deadline lapses, not after.

FAQ

Do small companies with a 0% CIT rate still need to file a return? Yes. The 0% rate under the Nigeria Tax Act 2025 is a rate, not an exemption from filing — a return is still due within six months of your financial year end, and skipping it still triggers the late-filing penalty.

What happens if my balance sheet doesn't balance on Rev360? The portal blocks submission. Its 100% completion indicator requires total assets to equal total equity plus total liabilities before it will accept an upload, so reconcile any discrepancy well before deadline week rather than in it.

Can I get more time to file my CIT return in Nigeria? Yes — NRS can grant a written extension of up to two months, but only if you apply before the original six-month deadline passes. An extension requested after the deadline has lapsed will not stop the late-filing penalty from accruing.

Getting your CIT filing right on Rev360 — balanced accounts, clean disclosures, and a return that matches your VAT records — shouldn't be a scramble against a six-month deadline. VOG Global Consult helps Nigerian businesses prepare audited financials, reconcile their filings before submission, and stay ahead of NRS deadlines. To book a CIT compliance review, contact VOG Global at Suite 060 to 061, Orago Complex, Area 10, Garki, Abuja.