How to File Your Tax Returns in Nigeria: A Step-by-Step Guide for 2026

Tax Filing in Nigeria Is No Longer Optional

For years, many Nigerians treated tax filing as something that only applied to large companies or wealthy individuals. That era is over. The Federal Inland Revenue Service (FIRS) and State Internal Revenue Services (SIRS) have significantly tightened enforcement, expanded digital filing systems, and increased penalties for non-compliance.

Whether you earn a salary, run a business, freelance for international clients, or generate income from investments, you are legally required to file tax returns. The process is more straightforward than most people assume, especially now that most states offer online filing.

Who Needs to File Tax Returns in Nigeria?

If you earn income in Nigeria, you almost certainly need to file. Specifically:

• Salary earners: Even if your employer deducts Pay-As-You-Earn (PAYE) tax from your salary, you are still required to file an annual tax return with your state's Internal Revenue Service.
• Freelancers and remote workers: If you earn income from clients (local or international), you are responsible for declaring that income and paying the appropriate tax.
• Business owners and entrepreneurs: Whether you run a registered company or an informal business, your income is taxable.
• Self-employed professionals: Doctors, lawyers, consultants, and other professionals in private practice must file.
• Investors: Income from dividends, interest, and capital gains may be taxable depending on the source and amount.

The common misconception that PAYE deduction means you do not need to file is wrong. PAYE handles the payment, but the filing is a separate legal obligation.

What You Need Before You Start

Gather these documents and information before beginning the filing process:

• Tax Identification Number (TIN): This is your unique tax identity. If you do not have one, you must register first.
• National Identification Number (NIN): Increasingly required for tax registration and verification.
• Income records: Salary slips, Form P9 (from your employer showing PAYE deductions), bank statements showing freelance or business income, and any other income documentation.
• Deduction documents: Receipts for pension contributions, National Housing Fund (NHF) contributions, life insurance premiums, and mortgage interest payments. These reduce your taxable income.
• Previous year's tax receipt: If you filed last year, having your receipt speeds up the process.

Step 1: Get Your Tax Identification Number (TIN)

If you do not already have a TIN, this is your first step. You cannot file without one.

For individuals:

1. Visit the Joint Tax Board (JTB) TIN registration portal or your State Internal Revenue Service office.
2. Provide your personal details: full name, date of birth, address, NIN, phone number, and email.
3. Submit the required identification documents.
4. Receive your TIN. This is usually generated within a few days for online applications.

For businesses, the process goes through the Federal Inland Revenue Service (FIRS) and requires your CAC registration documents.

Your TIN is permanent. Once you have it, you use the same number for all future filings.

Step 2: Calculate Your Total Income

Add up all income you received during the tax year (January 1 to December 31 of the previous year). This includes:

• Salary and wages (before deductions)
• Freelance and contract income
• Business profits
• Rental income
• Investment returns (dividends, interest)
• Any other income source

For salary earners, your employer's Form P9 provides most of this information. For freelancers and business owners, you will need to compile this from your own records and bank statements.

Step 3: Apply Allowable Deductions and Reliefs

Nigeria's Personal Income Tax Act provides several reliefs that reduce your taxable income:

• Consolidated Relief Allowance (CRA): ₦200,000 or 1% of gross income (whichever is higher) plus 20% of gross income.
• Pension contributions: Mandatory pension deductions under the Contributory Pension Scheme are tax-exempt.
• National Housing Fund (NHF): 2.5% of basic salary contributed to NHF is deductible.
• Life insurance premiums: Premiums paid on your own life insurance policy are deductible.
• Mortgage interest: Interest paid on a mortgage for your primary residence may qualify for relief.

After applying these deductions, you arrive at your taxable income.

Step 4: Calculate Your Tax

Nigeria uses a graduated tax rate system for personal income tax:

• First ₦300,000: 7%
• Next ₦300,000: 11%
• Next ₦500,000: 15%
• Next ₦500,000: 19%
• Next ₦1,600,000: 21%
• Above ₦3,200,000: 24%

A minimum tax of 1% of gross income applies if the calculated tax is lower than this threshold.

For salary earners whose employers handle PAYE, the tax has already been paid monthly. Your filing confirms the amounts are correct and accounts for any additional income or deductions.

Step 5: Complete and Submit Your Tax Return

You file with your State Internal Revenue Service (SIRS), not the federal government (unless you are a company filing corporate tax with FIRS).

Most states now offer online filing through their websites. The general process:

1. Log into your state's IRS portal using your TIN.
2. Fill in the annual return form with your income details, deductions, and tax calculation.
3. Upload supporting documents (Form P9, receipts, bank statements as required).
4. Review and submit.
5. Pay any outstanding tax through the portal's payment gateway or approved bank channels.
6. Download and save your tax clearance receipt.

If online filing is not available in your state, visit the SIRS office in person with your documents.

Filing Deadline

For individuals, the annual tax return for the previous year's income is due by March 31. For example, your 2025 income tax return must be filed by March 31, 2026.

Late filing attracts penalties: a fine of ₦50,000 for the first month and ₦25,000 for each subsequent month of default, plus interest on any unpaid tax.

Special Considerations for Freelancers and Remote Workers

If you earn income from international clients (via Upwork, Fiverr, direct contracts, etc.), that income is taxable in Nigeria. The fact that it is earned in dollars and paid to a domiciliary account does not exempt it from tax.

Key points for freelancers:

• Convert your foreign income to naira at the CBN rate for the period it was earned.
• You are responsible for calculating and paying your own tax since there is no employer to handle PAYE.
• Keep detailed records of all income received, including invoices, payment confirmations, and bank statements.
• You can deduct legitimate business expenses (internet costs, equipment, software subscriptions) from your gross income before calculating tax.
• File as a self-employed individual with your state's IRS.

Why Filing Matters Beyond Legal Compliance

Beyond avoiding penalties, tax filing has practical benefits:

• Tax Clearance Certificate (TCC): Required for government contracts, visa applications, bank loans, and many business transactions. You cannot get a TCC without filing.
• Proof of income: Filed tax returns serve as official proof of your earnings, which is useful for loan applications and financial planning.
• Avoiding future problems: The FIRS and SIRS are increasingly cross-referencing bank records, property ownership, and lifestyle indicators against tax filings. Unfiled returns create a growing liability that becomes harder to resolve over time.

Common Mistakes to Avoid

• Not filing because your employer handles PAYE. PAYE is payment, not filing. You still need to submit a return.
• Underreporting income. With increasing digital tracking, discrepancies between your bank records and tax filings are easier to detect than ever.
• Missing the March 31 deadline. Penalties accumulate monthly.
• Filing with the wrong state. You file with the state where you are resident, not where your employer is registered.
• Not keeping records. Without documentation, you cannot claim deductions, and you have no defense in an audit.