In the 2026 tax environment, the Nigeria Tax Act 2025 has clarified how to handle invoices that contain a mix of different items. To calculate the VAT correctly, you first have to determine if you are dealing with a Composite Supply or a Multiple (Mixed) Supply.
1. Composite Supply (The "Principal" Rule)
A composite supply is when you sell two or more things that are naturally bundled together. One item is clearly the "Principal," and the others are just ancillary (extra) parts needed to enjoy the main item.
- The Rule: You apply the VAT rate of the Principal Item to the entire bundle.
- Example: You sell a "Medical First Aid Kit." The kit contains bandages (taxable) and life-saving medicine (exempt). Since the principal purpose is medical care, the entire kit is treated as Exempt.
- Calculation: Total Bundle Price x Rate of Principal Item.
2. Multiple/Mixed Supply (The "Individual" Rule)
A multiple supply is when you sell several distinct items together for a single price, but they could easily be sold separately and aren't naturally bundled.
- The Rule: You must split the price and apply the specific VAT rate to each component.
- Example: You sell a "Back-to-School Hamper" containing a School Bag (7.5% VAT) and Notebooks (Exempt).
- Calculation:
- Determine the fair market value of each item.
- Apportion the single price across those values.
- Apply 7.5% to the bag's portion and 0% to the notebooks' portion.
3. How to Structure Your 2026 E-Invoice
With mandatory e-invoicing now in force, the Nigeria Revenue Service (NRS) portal requires you to itemize these to avoid rejection.
| Scenario | How to Invoice | VAT Applied |
|---|---|---|
| Purely Taxable | Item A + Item B | 7.5% on Total |
| Naturally Bundled | "Service Bundle" (Main Item) | Rate of the Main Item |
| Mixed Items | Line 1: Item A (Taxable). Line 2: Item B (Exempt) | 7.5% on Line 1 only |
Pro-Tip: If you cannot easily split the price of a mixed supply, the NRS often defaults to the highest rate applicable to any item in that mix. To save your customers money, always try to itemize taxable and exempt goods on separate lines in your software.
Summary Checklist
- Identify the "Principal": Is one item the main reason for the purchase?
- Itemize Line-by-Line: Does your e-invoicing software support multiple tax categories on one invoice? (Required for 2026).
Check Exemptions: Use the 2025 Act's expanded list (Basic food, medical, and renewable energy are your big zeros).