If you’re like most people living or doing business in Nigeria, at some point you’ll need to contact a tax office. Whether it’s the Federal Inland Revenue Service (FIRS) or your local State Internal Revenue Service (SIRS), getting the right contact info matters. Perhaps you’re trying to sort out a tax issue or just need information, I know firsthand how confusing, and sometimes even a bit stressful, finding credible contact points can be. There’s also, I think, always that tiny bit of worry about running into fake numbers or scam emails. This guide’s here to help you get official FIRS & SIRS contact information, honestly, as simply as possible.
Overview: The Importance of FIRS and SIRS in Nigeria
Let's step back for a second. First, why do these two agencies exist? FIRS manages all federal tax matters for the entire country. If you pay VAT, company income tax, or even stamp duties, that's them. SIRS operates at state level, handling taxes like personal income, tenement rates, and so on, think Lagos State IRS, Kaduna State IRS, and others. Both FIRS and SIRS keep essential public services running, from roads to schools, by collecting the funds the government relies on.
But the offices aren’t just about collecting money. They answer questions, guide taxpayers, help you fix issues with your tax identification (this comes up a lot), and offer support especially if you own a business. So knowing the right way to reach out? Pretty crucial.
If you want to learn more about Nigerian tax compliance and how these agencies fit into the bigger picture, see our introduction to Nigerian tax laws.
Federal Inland Revenue Service (FIRS): All Contact Information
FIRS Head Office Address and Phone Numbers
Ok, let’s start national. If you want to visit or mail the FIRS at their main headquarters, or maybe just call, here’s what you need:
- Head Office Address: Revenue House, 15 Sokode Crescent, Wuse Zone 5, Abuja, Nigeria
- Official FIRS Phone Numbers:
0907 509 1111
0909 744 0444
0817 544 7418
Those are the ones listed directly by FIRS, so yes, they're safe to use.
FIRS Official Email Addresses
If you’re more of an email person (sometimes I find writing it down easier than talking), FIRS’s main customer support email is:
- Enquiries: enquiries@firs.gov.ng
For issues about payments or Tax Identification Numbers (TIN), you can try:
- TIN Support: tin@firs.gov.ng
- Payments Support: paymentsupport@firs.gov.ng
If you're unsure what a Tax Identification Number is or how to get one, you can read our Tax Identification Number (TIN) in Nigeria guide.
FIRS Self Service Portal Link
Honestly, if you haven’t used their online portal yet, you might be missing out. Many quick questions (TIN verification, e-tax payments) get solved there, saving you a call.
- FIRS Self Service Portal: https://taxpromax.firs.gov.ng
You might need to create an account, but it doesn't take long. Sometimes the site can be slow during peak times (just a heads-up).
FIRS Contact Centre Hours and Availability
- Mondays to Fridays: 8:00am to 4:00pm
- Public holidays/weekends: Closed
Best time? Early mornings, right after lines open, are usually quieter. Around noon or closing hours, you may have to wait a bit.
State Internal Revenue Services (SIRS): Contact Details by State
Here's honestly the part I find most people search for. Your state's IRS office will deal with a lot of your day-to-day tax issues. Let’s focus on major states and how to contact them directly.
Lagos State IRS Contact
- Address: Revenue House, 1, Ezimedu Street, Off Awolowo Way, Ikeja, Lagos
- Official Phone Numbers: 0700 2255 52747
- Email: info@lagosirs.gov.ng
- Website: https://lagosstirs.gov.ng
Kano State IRS Contact
- Address: No. 2A, Civic Centre Road, Kano
- Phone: 0816 526 9697
- Email: info@kirs.gov.ng
- Website: http://www.kirs.gov.ng
Rivers State IRS Contact
- Address: Revenue House, Plot GS/1, Amadi Ama Layout, Port Harcourt
- Phone: 0906 240 0001
- Email: info@rsirs.ng
- Website: https://www.rsbirs.org.ng
FCT-IRS Contact
- Address: Revenue House, No 3 Sokode Crescent, Wuse Zone 5, Abuja
- Phone: 092 919 391
- Email: info@fctirs.gov.ng
- Website: https://fctirs.gov.ng
Other States
You can usually find official contacts for your state IRS through the state's government website or by visiting Nigeria’s FIRS “Tax Offices” directory. Or, honestly, sometimes a quick call to your Local Government secretariat helps, they often have SIRS numbers posted too.
If you're unsure about which taxes fall under FIRS or SIRS, you can get a complete guide to business tax in Nigeria.
Working Hours and Best Times to Contact FIRS & SIRS
This can be a bit inconsistent, some state offices keep pretty strict hours, others stay open a little longer, especially in Lagos or Abuja. Best practice?
- Plan between 8:00am and 4:00pm, Monday to Friday
- Avoid public holidays and late Fridays, teams are usually smaller then, so longer waits
- For urgent things, try right after opening (8-9am). Lunchtimes and just before closing can get crowded
Online support portals and email, okay, those are available 24/7 for submitting queries, but replies come during business hours.
For common tax queries or if you want to ask quick tax questions any time, try the Tax Chatbot web app.
Official Social Media & Online Support Channels
Maybe you don’t want to call or email yet. Social media can provide faster responses, but remember to stick to verified accounts only.
FIRS on Facebook
- Official Page: facebook.com/firsNigeria
Updates, announcements, and sometimes they reply to direct messages, especially about general matters.
FIRS on Instagram
- Official Profile: instagram.com/firsnigeria
Mostly used for public awareness, not quick support, but replies happen.
FIRS on Twitter/X
- Official Handle: twitter.com/firsNigeria
Honestly, Twitter seems to get the fastest response. Tag them or DM for things like TIN issues or report scams.
Using the FIRS Self-Service Portal
As mentioned earlier, this portal sorts out a lot, TIN verification, paying taxes, printing receipts, that sort. You’ll need your TIN and sometimes your registered email. It’s secure (as far as government websites go), but if you’re stuck, use their support links in the portal itself.
If you want step-by-step instructions, check our guide to filing taxes in Nigeria.
Frequently Asked Questions About FIRS and SIRS Contacts
What documents should I have before calling?
It’s safest to have your Tax Identification Number (TIN), company name (if applicable), recent correspondence, or your registered phone/email.
Can I walk in without an appointment?
You can, but for issues like complex audits, appointments help.
What about business owners or start-ups?
Both FIRS and SIRS provide special help desk lines and support for business registrations, ask when you call.
Why haven’t I gotten a response to my email?
Sometimes replies take several days, especially after major filing deadlines. Try calling if you don’t hear back after 2-3 working days.
Is my information secure if I use the self-service portal?
Security is a priority, though, as with anything online, double-check that you’re on the https://taxpromax.firs.gov.ng site.
Tips for Getting Fast and Effective Support
- Be ready with your TIN and details before calling, saves loads of back-and-forth.
- Politeness really helps. The agents are dealing with hundreds, sometimes thousands of callers.
- Call early in the day for less waiting.
- Use official channels only. There are sadly too many fake numbers and emails circulating. Always double-check on the FIRS main site or your state IRS portal.
- Follow up by email after phone calls if you want a written record, especially for business issues.
Final Thoughts & Quick Reminders
It might feel overwhelming, but it’s really just about knowing the right place to ask. Use only official FIRS and SIRS contact details, never trust third parties with private tax questions or documents.
If you’re looking for next steps, maybe you want to learn how to file your taxes with FIRS; or need details on registering your business, or paying state and federal taxes online. These links have proven useful for many.
I’d say, when in doubt, call the official number, check the website, and ask for help. It’s what the system is ultimately there for, taxes aren’t fun for anyone, but at least reaching support shouldn’t be a nightmare.
Stay safe, use verified contact points, and keep this info somewhere handy for the next time tax season rolls around.