Every Nigerian business that issues invoices - whether you are a sole trader in Kano, a tech startup in Yaba, or a consulting firm in Victoria Island - needs to understand what the Federal Inland Revenue Service (FIRS) now requires on every invoice. Getting it wrong does not just look unprofessional; it can attract penalties, block your clients from claiming input VAT, and put your business at risk during a tax audit.
This guide covers every mandatory field, explains how VAT at 7.5% applies, and walks through the consequences of non-compliance. For a broader overview of invoicing in Nigeria, visit our complete Nigerian invoicing guide.
What Is a FIRS-Compliant Invoice?
A FIRS-compliant invoice is a formal document that meets the requirements of the Value Added Tax Act (Cap V1, LFN 2004 as amended), the Finance Act 2020, and subsequent FIRS guidelines. For VAT-registered businesses, a compliant invoice is the only document that allows your buyer to claim input VAT credit. For all businesses, it is the primary record used by FIRS to verify transactions during audits.
Consider this: if your client pays ₦500,000 for a project and cannot reclaim the ₦35,156 VAT on that invoice because the invoice is non-compliant, they will look for a supplier who issues correct invoices. A compliant invoice is therefore a competitive advantage.
Mandatory Fields on Every Nigerian Invoice
1. The Word "Invoice" or "Tax Invoice"
The document must be clearly labelled as an Invoice or Tax Invoice. This distinguishes it from a receipt, quotation, or delivery note. VAT-registered businesses should use "Tax Invoice."
2. Your Registered Business Name and Address
Use your business name exactly as it appears with the Corporate Affairs Commission (CAC). Include your physical or registered office address. A P.O. Box alone is not sufficient.
Example:
Bright Solutions Limited 14 Adetokunbo Ademola Crescent, Wuse 2, Abuja
3. Tax Identification Number (TIN)
This is non-negotiable. Since the Finance Act 2020, every business entity in Nigeria must include its TIN on all invoices. Your TIN is issued by FIRS and can be verified at the FIRS TIN portal.
- Sole traders and freelancers must include their personal TIN
- Format: typically an 8-digit number (e.g.,
12345678-0001) - If you do not yet have a TIN, register at FIRS.gov.ng before issuing formal invoices
4. VAT Registration Number
If your business turnover exceeds ₦25 million per year, you must be VAT-registered and include your VAT registration number on every tax invoice. Businesses below this threshold do not charge VAT but may register voluntarily.
5. Unique Sequential Invoice Number
Every invoice must carry a unique, non-repeating invoice number that follows an unbroken sequence within the calendar year. FIRS uses invoice sequences to detect gaps that may indicate unreported transactions.
Recommended format: INV-2026-001, INV-2026-002, INV-2026-003…
If you cancel an invoice, issue a credit note against it - never recycle the invoice number.
6. Invoice Date
The date on which the invoice is issued. For VAT invoices, FIRS requires that the invoice be issued within 15 days of the end of the month in which the supply took place.
Example: A web design project completed on 18 March 2026 must have its tax invoice issued no later than 15 April 2026.
7. Client Name and Address
Include the full legal name and address of the buyer. For B2B transactions, also include the client's TIN - this enables them to claim input VAT and is increasingly required by large corporates and government agencies.
8. Description of Goods or Services
Be specific. FIRS auditors expect a clear description of what was supplied.
Weak: "Consultancy Services - ₦300,000" Strong: "Digital marketing strategy and Q1 2026 campaign planning (Jan–Mar 2026, three months) - ₦300,000"
Vague descriptions are a common trigger for invoice disputes and audit queries.
9. Quantity and Unit Price
List each item or service with its quantity and unit price. For projects with multiple deliverables, itemise each line separately.
| Description | Qty | Unit Price | Line Total | |---|---|---|---| | Logo design | 1 | ₦150,000 | ₦150,000 | | Brand style guide | 1 | ₦80,000 | ₦80,000 | | Business card design | 2 | ₦25,000 | ₦50,000 | | Subtotal | | | ₦280,000 |
10. VAT at 7.5%
Nigeria's VAT rate is 7.5% under the Finance Act 2019. Show it as a separate line item on every tax invoice.
Example:
Subtotal: ₦280,000 VAT (7.5%): ₦21,000 Total Due: ₦301,000
Exempt items - basic food, books, pharmaceuticals, and educational materials - do not attract VAT. If an invoice mixes taxable and exempt items, calculate VAT only on the taxable lines.
11. Total Amount Due
Display the final payable amount clearly, in figures:
Total Due: ₦301,000
12. Payment Details
Include your:
- Bank name
- Account name (must match your registered business name)
- NUBAN account number
- Payment gateway link (Paystack, Flutterwave) if available
The E-Invoicing Mandate: What Has Changed
FIRS has been rolling out the Merchant Buyer Solution (MBS), Nigeria's national e-invoicing framework. Under MBS:
- B2B invoices above specified thresholds require digital validation through a FIRS-accredited Access Point Provider
- Validated invoices receive a unique Invoice Reference Number (IRN) and a QR code
- Buyers can verify authenticity by scanning the QR code
If you supply goods or services to large corporations or government agencies, confirm whether they require MBS-validated invoices. Non-validated invoices may be rejected by their accounts payable systems.
Penalties for Non-Compliance
FIRS enforces invoice requirements under the VAT Act and the FIRS Establishment Act:
Financial Penalties
- Failure to issue a tax invoice: ₦50,000 for the first offence; ₦100,000 for each subsequent offence
- Charging VAT without registration: FIRS can recover all VAT collected plus a 150% surcharge
- Incorrect VAT calculation: Assessment of the shortfall plus interest at the prevailing CBN rate
Commercial Consequences
- Clients withhold payment until a compliant invoice is provided
- Your buyers lose input VAT credits, damaging the relationship
- Inconsistent invoice numbering is a common audit trigger - once FIRS opens an audit on an invoice irregularity, they typically review three to five years of records
Quick Compliance Checklist
Use this before sending any invoice:
- [ ] Labelled "Invoice" or "Tax Invoice"
- [ ] Your registered business name and address
- [ ] Your TIN
- [ ] VAT registration number (if applicable)
- [ ] Unique sequential invoice number
- [ ] Invoice date
- [ ] Client name and address (with their TIN for B2B)
- [ ] Specific description of goods or services
- [ ] Quantity and unit price per line item
- [ ] Subtotal, VAT (7.5%), and total amount due
- [ ] Your bank details or payment gateway link
Frequently Asked Questions
Do freelancers need a TIN on invoices? Yes. Any individual or business issuing formal invoices for commercial transactions in Nigeria should include their TIN. Individual TINs are obtained free of charge from FIRS.
What is the VAT threshold? Businesses with annual turnover of ₦25 million or more must register for VAT. Below this threshold, VAT registration is optional.
Can I invoice in USD? Yes, but VAT must be calculated in Naira using the prevailing CBN exchange rate at the time of supply.
Create FIRS-compliant invoices in under two minutes - with TIN fields, automatic 7.5% VAT, and sequential numbering built in. Try the free invoice generator for Nigerian businesses.