A Beginner’s Guide to Filing Taxes in Nigeria (2026 Updated NIN-TIN Process)

For many Nigerians, taxes feel complicated, especially when you hear terms like TIN, NIN, PAYE, and tax portal.

But let’s make this clear, simple, and actually useful.

This guide explains how to file taxes in Nigeria, including the latest on using your National Identification Number (NIN) to generate a Tax Identification Number (TIN) through the official portal.

No jargon, just practical steps you can take today.

🔹 Understanding NIN vs TIN in Nigeria

What Is NIN?

• NIN = National Identification Number

• Issued by NIMC (National Identity Management Commission)

  
  

• Unique to you for identity verification

This number can now be used to generate your TIN without visiting tax offices.

What Is TIN?

• TIN = Tax Identification Number

• Issued by either:

  • Federal Inland Revenue Service (FIRS)

  • State Internal Revenue Service (SIRS)

• Used for all tax transactions (returns, filings, compliance)

🟢 You Can Use Your NIN to Get a TIN (2026 Update)

The Nigerian government has streamlined the process.

Instead of registering separately for a TIN in many cases, you can now:

✔ Use your NIN
✔ Access the Joint Tax Board (JTB) TIN portal
✔ Generate a TIN online
✔ Without needing to visit a tax office

👉 This improvement is part of Nigeria’s push toward digital tax compliance and ease of doing business.

Many taxpayers now generate their TIN entirely through the portal using NIN data.

🧠 Step-By-Step: How to Get Your TIN Using Your NIN

Here’s the official way to do it online:

1. Visit the Joint Tax Board (JTB) Portal

The official tax portal in Nigeria:
🔗 https://www.jtb.gov.ng/tinportal

This platform is the centralized TIN registration system recognized by both Federal and State tax authorities.

2. Select “Individual” Registration

You’ll see options like:

• Individual

• Business

• Company

Choose Individual if you’re:

✔ A salaried worker
✔ Self-employed
✔ Freelancer
✔ Small business owner

3. Enter Your NIN

You will be prompted to enter your:

📍 Full Name
📍 Date of Birth
📍 NIN

The system will validate your identity.

This is the part that makes it easier for your NIN to automatically fill key profile data.

4. Fill in Contact Details

You’ll complete:

✔ Residential address
✔ Phone number
✔ Email address
✔ State and LGA (Local Government Area)

Make sure these match your identity documents.

5. Submit & Receive Your TIN

After verification:

✔ Your TIN will be generated instantly
✔ A confirmation SMS may be sent
✔ You can download your TIN certificate

If there’s an error, you may be asked to update data or visit a tax office, but for most people, this step is now fully online.

💡 Why This Matters

In the past, getting a TIN meant:

• Visiting tax offices

• Standing in lines

• Filling forms manually

Now you can complete the process online with NIN as the gateway.

This is a major improvement for taxpayers.

📌 Who Should Get a TIN in Nigeria?

You need a TIN if you:

✅ Earn a salary and pay Personal Income Tax
✅ Are self-employed
✅ Run a business
✅ Receive rental income
✅ Have investment income
✅ Want to file annual tax returns

Even if tax is deducted by your employer (PAYE), you still need a TIN to file annual returns and reconcile tax records.

🧾 How Tax Filing Works After You Get a TIN

Once you have your TIN:

1. Confirm Tax Deduction Cards

If you’re employed:

• Your employer should enter your TIN in their payroll system

• Tax is deducted monthly (PAYE)

2. File Annual Returns

Even if PAYE handles the monthly deduction, you still file an annual return:

✔ Declare full income
✔ Report all deductions
✔ Claim allowances (like pension contributions)

This is typically done via the tax authority portal (FIRS or SIRS), depending on your income type.

3. Use the Portal to Upload Docs

Most states now allow:

• Online uploading of tax returns

• Digital submission with TIN and receipts

• Verification without printing

This is part of Nigeria’s digital tax transformation.

💡 Common Beginner Questions (Answered)

❓ “If my employer deducts tax monthly, do I still need to file?”

Yes: you still file an annual return to reconcile your tax position and claim allowable reliefs.

❓ “Can I use the same TIN for federal and state taxes?”

Yes, the TIN you generate online is valid across federal and state tax services.

❓ “What if the portal rejects my NIN?”

There could be a mismatch in NIN data. In that case:

• Visit your nearest SIRS/FIRS office

• Take your valid ID and proof of address

• Update your record

This is rare but occasionally necessary.

🧠 Tips to Make Filing Easier

📌 Keep your payslips and tax deduction cards
Also keep:

• Bank statements

• Investment income proof

• Rental income records

• Self-employment invoices

Documentation makes filing smooth.

🗓 Filing Deadlines to Know

✔ Annual returns: Usually before January 31st each year (may vary by state)

✔ PAYE remittances: Monthly (handled by employers)

✔ State deadlines: Check your State Internal Revenue Service (e.g., LASRRA in Lagos, KASRT in Kano)

Missing deadlines can lead to penalties.

⚠️ Common Newbie Mistakes

❌ Waiting until the last minute
❌ Not linking NIN to your TIN
❌ Giving incorrect contact info
❌ Ignoring allowable tax reliefs
❌ Filing late without reminders

Avoid these early, and you’ll save money, time, and stress.

📌 Recap: Simple Tax Filing Flow

1️⃣ Get your NIN
2️⃣ Use the NIN to generate a TIN on the JTB portal
3️⃣ Confirm payroll deductions (if employed)
4️⃣ Prepare income records
5️⃣ File annual tax returns online
6️⃣ Keep evidence and receipts

Tax filing in Nigeria doesn’t have to be complicated.

Thanks to progress in tax digitalization:

✔ You can generate your TIN using your NIN
✔ You can file returns online
✔ You can avoid many trips to the tax office

Taxes are not barriers.
They’re part of your financial journey and discipline.

At Happyinvest.ng, we believe:

Financial literacy includes understanding taxes —
not avoiding them.

Taxes protect rights.
Compliance builds confidence.
Preparation saves money.