Ultimate Guide: How to File Your Nigeria Tax Returns Before the March 31 Deadline

Most Nigerians believe their employer handles everything. They see PAYE deductions on their payslip and assume that closes the file. It does not.

Under the Nigeria Tax Act 2025, every income-earning individual must still file an annual personal tax return by March 31, covering what you earned in the previous year. That means right now, you owe a filing for your full 2025 income.

This guide walks you through the complete process, from getting your TIN to clicking submit, with verified details from the Lagos State Internal Revenue Service (LIRS), the Joint Tax Board (JTB).

Who Must File Tax Returns in Nigeria

This question trips up thousands of taxpayers. The answer is simple: if you earned any income in Nigeria in 2025, you must file.

Key Changes Under the Nigeria Tax Act 2025 You Must Know

The Nigeria Tax Act 2025 took effect on January 1, 2026. It changes how you calculate what you owe. If you are using old figures, you will get your filing wrong.

The Consolidated Relief Allowance Is Gone

The old Consolidated Relief Allowance (CRA) has been abolished. You can no longer claim it. In its place, you get new relief options.

New Rent Relief Available

If you pay rent, you can now deduct the lower of ₦500,000 or 20% of your actual annual rent paid from your taxable income. You must submit a valid rent receipt and tenancy agreement to support the claim. The deduction only applies to rent paid within the specific tax year you are filing for.

Zero-Rate Band of ₦800,000

The first ₦800,000 of your taxable income is now taxed at 0%. This is a direct benefit for lower-income earners. Income above that level follows Nigeria's progressive tax structure.

Pension and NHF Deductions Still Apply

Contributions to your pension fund and the National Housing Fund (NHF) remain deductible. You will need supporting documentation to claim them.

Documents You Need Before You Start Filing

Get these ready before you open any portal. Missing documents mid-filing wastes time and can cause errors.

• Tax Identification Number (TIN)
• Government-issued ID (NIN, Driver's License, or International Passport)
• Payslips or salary statements (January to December 2025)
• Bank statements for 2025
• Business income records or invoices (if self-employed)
• Rent receipts and tenancy agreement (to claim rent relief)
• Pension contribution statements
• NHF contribution records
• Evidence of any withheld taxes paid on your behalf

How to File Your Nigeria Tax Returns: Step-by-Step Guide

Follow these steps in order. Do not skip step one. Many people struggle at the filing stage because they skipped the calculation step.

• Get or Confirm Your TIN

  Your Tax Identification Number is the foundation of everything. Without it, you cannot file. Visit tin.jtb.gov.ng to verify or generate yours using your NIN. Salaried employees should ask HR before visiting any portal.

• Calculate Your Tax Liability First

  Filing is a summary of your finances. Before you file, calculate what you owe. Log into your state's e-tax portal, navigate to Assessments, and enter your income figures. Add all income sources. Under Deductions, enter pension, NHF contributions, and rent (if applicable). The system will compute your taxable income.

  If your employer already deducted taxes through PAYE, enter those as withheld taxes. The system will show whether you have a balance to pay or are fully settled.

• Declare All Income Sources

  You must report every naira earned in 2025. This includes salary and wages, freelance or consulting income, rental income, dividends, interest from savings, business profits, and any foreign income if you are a Nigerian resident. Do not leave anything out. Omissions attract audits and penalties.

• Apply Your Deductions and Reliefs

  Manually enter your eligible deductions in the portal's Deductions section. This includes rent relief (lower of ₦500,000 or 20% of actual rent paid), pension contributions, and NHF contributions. Upload your supporting documents. Without documentation, your claims will be rejected.

• File Your Annual Return Online or In Person

  Go to your state's Internal Revenue Service portal and navigate to the annual filing or self-assessment section. Fill in your personal details, employment information, and complete income breakdown. Upload all required documents. Review every figure before submitting. Personal Income Tax is administered by the state where you reside, not your state of origin.

  If your state does not have a digital portal yet, visit the designated tax office in person with all your documents.

• Pay Any Outstanding Tax Balance

  If your filing shows you owe additional tax beyond what was already deducted, pay it now. You can pay through your bank using your TIN as the reference, via online banking portals, or directly at your state IRS office. Do not file without settling the balance.

• Download Your Filing Confirmation

  After successful submission, download or save your acknowledgment receipt. This is your proof of compliance. You will also need it when applying for your Tax Clearance Certificate.

Penalties for Late Filing of Tax Returns in Nigeria

The Nigeria Tax Administration Act 2025 is explicit. Non-compliance is expensive, and the charges keep accumulating.

Default Period	Penalty	Consequence
First month after March 31	₦100,000	Mandatory penalty
Each additional month	₦50,000 / month	Charges keep accruing
Late payment of outstanding tax	CBN interest rate applied	Interest on unpaid balance
Persistent non-compliance	Power of substitution	Tax authority recovers debt via third parties
Continued refusal	Automated audit alerts	Possible investigation by NRS

Why Filing Your Tax Return Matters Beyond Compliance

Filing is not just about avoiding fines. It unlocks access to critical services that affect your career, business, and personal life.

✅ What Your Tax Clearance Certificate Unlocks

• Government contracts and procurement bids
• Bank loans and mortgage applications
• Visa applications (UK, US, Canada, Schengen)
• Property registration and land transactions
• Professional license renewals
• Company directorship and regulatory approvals

Your Tax Clearance Certificate (TCC) is only issued after you have filed and settled your tax returns for the preceding three years. Miss this year, and you could lose access to these services next time you need them most.

Special Guidance for Freelancers and Multiple Income Earners

Nigerians with side hustles face a common misconception: that their employer's PAYE filing covers their other income. It does not.

If you earned from a 9-to-5 job and also did consulting, ran an online business, or received rental income, you must declare all of it. You file one combined return covering every naira from every source.

Also note: if a company paid you as a freelancer or service provider, they likely deducted withholding tax at the source and remitted it to the government. When filing, enter those withheld amounts in the portal so they are credited against what you owe. Keep all payment receipts and invoices as proof.