Identifying the principal supply is the single most important step in taxing a composite supply. If the wrong principal supply is selected, the entire tax rate may be incorrect, leading to either short payment or excess collection.
Legal Definition
Section 2(90) of the CGST Act defines principal supply as the supply of goods or services which constitutes the predominant element of a composite supply and to which any other supply forming part of that composite supply is ancillary.
The definition has two components:
- Predominant element: The supply that is the main or core object of the transaction.
- Ancillary: Other supplies that are subordinate, incidental or supportive to the main supply.
Statutory Illustration
The illustration to Section 2(30) states: "Where goods are packed and transported with insurance, the supply of goods, packing materials, transport and insurance is a composite supply and the supply of goods is the principal supply."
Here, the buyer wants goods. Packing, transport and insurance are necessary to deliver the goods. Therefore, goods are the principal supply.
Practical Tests
1. Primary Objective of the Customer
What does the customer essentially want? In a hotel room with breakfast, the customer primarily wants accommodation. Breakfast is incidental. Accommodation is the principal supply.
2. Essential Character of the Transaction
Remove one component. If the transaction still makes commercial sense without the other, the removable component is ancillary. If the core transaction collapses, it is principal.
3. Relative Value of Components
While value is not determinative, it is a strong indicator. If one component accounts for the majority of the price, it is likely the principal supply.
4. Commercial Understanding
How does the industry and common trade practice view the supply? A laptop with pre-installed OS is understood as supply of laptop, not software.
5. Usefulness of Ancillary Component
Ancillary components are useful only in conjunction with the principal supply. A warranty is useless without the product.
6. Marketing and Invoice Description
How the supply is described in the contract, invoice and marketing material provides evidence of intent.
Examples
Goods with Installation
Supply of machinery with installation and commissioning. The principal supply is the machinery (goods). Installation is ancillary. The composite supply is taxed at the GST rate applicable to machinery.
Software with AMC
Supply of software licence with annual maintenance. The principal supply is the software licence. AMC is ancillary. Tax rate is that of software.
Construction with Materials
A works contract is specifically deemed a service under Schedule II. The principal supply is construction service. Goods used in construction are ancillary. Therefore, works contract is taxed as a service.
Event Management with Catering
If a single package for a corporate event includes venue, décor, audio-visual and catering, the principal supply may be event management service if the event's core purpose is the event experience. Catering is ancillary.
Documentation to Support Principal Supply
Businesses should maintain:
- Contract or agreement describing the scope and dominant obligation.
- Pricing break-up, if any, showing value of each component.
- Brochures and marketing material showing the primary offering.
- Invoices clearly identifying the principal supply.
- Internal analysis note explaining why a particular supply is principal.
Advance Rulings and Case Law
Advance Rulings have examined several combinations:
- AAR held that supply of UPS with battery is a composite supply with UPS as principal supply.
- AAR held that supply of elevator with installation and AMC is a composite supply with elevator as principal.
- Courts have applied the 'predominant nature' test in line with the single supply doctrine under European VAT.
Consistency is key. If a business treats a supply as composite and later changes the principal without reason, it invites scrutiny.
How Anuj Desai & Associates Can Help
We assist businesses in identifying principal supply, documenting the rationale, structuring invoices, applying correct tax rates and defending classification in assessments.
Contact Anuj Desai & Associates
Email: office@anujdesaiassociates.com
Phone: 9619456656
Website: https://anujdesaiassociates.com
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