Why GST Classification Disputes Are the Biggest Tax Battleground in India

Classification of goods and services under the Goods and Services Tax (GST) framework is one of the most litigated and consequential aspects of indirect taxation in India. Getting the classification right is not merely a compliance exercise — it determines the applicable tax rate, eligibility for exemptions, the applicable HSN (Harmonised System of Nomenclature) or SAC (Services Accounting Code), and ultimately the tax liability of a business.

India’s GST rate structure has five principal slabs — NIL, 5%, 12%, 18%, and 28%. The difference between two neighbouring slabs can mean crores of rupees in additional tax outgo for a business over a financial year. For instance, a product classified at 12% instead of 5% on an annual turnover of ₹50 crore would result in an additional GST burden of ₹3.5 crore per year — a difference that can make or break a business’s bottom line.

Classification disputes arise from the inherent ambiguity in tariff entries, the evolution of new products and services that did not exist when the GST schedules were drafted, conflicting AAR (Authority for Advance Ruling) decisions across states, and differing interpretations of the principles of specific versus general entries. With the 2026 amendments introduced through the Finance Act 2025, the GST Council has restructured certain rate schedules and issued fresh circulars, making this an even more dynamic area of law.

This comprehensive blog covers: the legal framework for GST classification, principles of interpretation, the HSN/SAC code system, composite and mixed supply rules, exemption-related classification battles, and a curated digest of over 15 landmark case laws from the Supreme Court, High Courts, CESTAT, and AAR/AAAR — all updated and relevant for 2026.

📌  GST Classification disputes account for nearly 35% of all GST litigation in India as of 2026, making it the single largest source of tax uncertainty for businesses. Source: CBIC Annual GST Litigation Report 2025-26.

Legal Framework for GST Classification in India

The Statutory Basis

GST classification is primarily governed by:

• Section 9 of the CGST Act, 2017 — the charging section, which levies tax on supply of goods or services based on rates notified by the government.
• Notification No. 1/2017-CT(R) — Rate schedule for goods (with HSN codes).
• Notification No. 11/2017-CT(R) — Rate schedule for services (with SAC codes).
• Notification No. 2/2017-CT(R) — Exemption list for goods.
• Notification No. 12/2017-CT(R) — Exemption list for services.
• Section 8 of the CGST Act — Rules for composite and mixed supply.
• GST (Compensation to States) Act, 2017 — Additional Cess schedules.
• Customs Tariff Act, 1975 — HSN code structure adopted for GST goods classification.

The HSN Code System

India adopted the HSN system under GST for classification of goods. HSN is an internationally standardised nomenclature developed by the World Customs Organization (WCO). India uses a 6/8-digit HSN code system:

Turnover Threshold	HSN Digits Required	Example
Up to ₹5 Crore	4 Digits	1006 (Rice)
Above ₹5 Crore	6 Digits	100630 (Semi-milled Rice)
Exports / Imports	8 Digits	10063020 (Parboiled semi-milled)

 

The SAC Code System for Services

Services are classified under the Services Accounting Code (SAC), a 6-digit code system. The first two digits (99) are fixed for all services, the next two identify the major service category, and the last two identify the sub-category. For example, SAC 9963 covers Accommodation, food and beverage services; SAC 998311 covers Management consulting services.

Principles of Classification Under GST — The Interpretive Rules

Rule 1: Specific Entry Prevails Over General Entry

When a product or service can be classified under both a specific entry and a general entry, the specific entry prevails. This is the most fundamental principle of classification, consistently upheld across pre-GST and GST jurisprudence. For example, if ‘biscuits’ are specifically listed, they cannot be classified under the general entry ‘food preparations’.

Rule 2: Essential Character Test for Composite Goods

For goods that consist of more than one material or substance, classification is based on the material or component that gives the goods their essential character. This is derived from the WCO General Rules of Interpretation (GRI Rule 3(b)) and extensively applied in Indian GST cases involving combination products.

Rule 3: Common or Commercial Parlance Test

Goods and services should be classified based on how they are understood in common trade, industry, or commercial parlance — not based on technical or scientific definitions, unless the entry expressly uses technical terminology. The Supreme Court has consistently applied this principle in classification disputes.

Rule 4: Section and Chapter Notes Prevail

Section Notes and Chapter Notes in the GST rate schedules have statutory force and must be read before attempting to classify any goods. These notes define what is included and excluded from each chapter, and their scope overrides any apparent plain meaning of the heading.

Rule 5: Composite Supply vs. Mixed Supply

Section 8 of the CGST Act distinguishes between composite and mixed supply — a crucial distinction with significant tax implications:

Composite Supply	Mixed Supply
Two or more taxable supplies naturally bundled together	Two or more independent supplies combined artificially for a price
One supply is the ‘principal supply’	No principal supply; all are independent
Taxed at the rate of the principal supply	Taxed at the highest rate applicable among all supplies
Example: AC bus ticket with free meals (transport is principal)	Example: Diwali hamper — chocolates + candles + dry fruits

 

Major Categories of GST Classification Disputes in India

1. Food & Beverages — The Most Contested Category

Food classification is consistently the most litigated area under GST. The core dispute revolves around whether an item is an ‘agricultural produce’ (exempt or 5%), a ‘processed food’ (12%), or a ‘ready-to-eat product’ (18%). The degree of processing and packaging are key determinants.

• Papad: Classified at NIL rate, regardless of branding, shape, or flavouring — confirmed by CBIC Circular 52/26/2018.
• Namkeen/Bhujia: 12% GST — classified as ‘snack food’ and not ‘agricultural produce’.
• Frozen Paratha vs. Roti: AAR Karnataka held frozen paratha attracts 18% (food preparation), whereas fresh roti/chapati is 5%. AAAR upheld this, causing significant controversy.
• Fruit juices with added sugar: Classified as ‘mixed fruit beverages’ — 12% GST, not NIL as ‘fruit’.
• Restaurant food — Dine-in vs. Cloud Kitchen: Both attract 5% GST (without ITC) post July 2022 rationalisation.

2. Construction & Real Estate Classification

GST on construction services is highly contested, particularly the distinction between:

• Works Contract Services (18% with limited ITC) — services supplied to business entities.
• Affordable Housing Construction (1% effective rate) — strict conditions on price and carpet area.
• Other Residential Construction (5% effective rate) — ongoing construction projects.
• Pure Services to Government vs. Works Contract: Government services may qualify for exemption under Notification 12/2017, while works contracts (involving material) do not.

3. Software & IT Services

With the digital economy expanding rapidly, classification of IT and software products remains contested:

• Customised Software: Treated as ‘service’ — 18% GST under SAC 998314.
• Off-the-Shelf Software on CD/DVD: Treated as ‘goods’ under HSN 8523 — 18% GST.
• Software as a Service (SaaS): Treated as service — 18% GST.
• E-books / Digital Publications: Disputed — goods (HSN 4901) at NIL rate or electronic service at 18%? Resolved in 2025 as service at 18%.
• Online Gaming Platforms: Post 2023 amendment, actionable claims from online gaming attract 28% GST on full face value of bets.

4. Healthcare & Pharmaceutical Classification

Healthcare classification disputes often arise between NIL-rated healthcare services and taxable support services:

• Medical services by a clinical establishment: Exempt under Notification 12/2017.
• Services of renting of rooms/ICU beds: Exempt only if charges are below ₹5,000/day per room (post 2022 rationalisation). Above ₹5,000 — 5% GST.
• Diagnostic Services: Exempt when provided by a clinical establishment. Taxable at 18% if provided by an independent diagnostic lab not meeting the definition of ‘clinical establishment’.
• Pharmaceutical products — distinction between medicines (12%) and cosmetics (18%) is frequently disputed for nutraceuticals, medicated shampoos, and herbal products.

5. Agricultural & Allied Products

Agriculture-related classification disputes are common, especially around the processing threshold:

• Raw, unprocessed produce: Exempt or NIL rated.
• Processed, branded packaged goods: 5% to 12% depending on the product.
• Cotton seed oil cake: Classified as animal feed (NIL) vs. fertiliser — heavily litigated.
• Aquaculture products: Prawn feed and aqua chemicals classification varies significantly.

Case Law Digest — Landmark GST Classification Rulings (2018–2026)

The following case studies represent landmark decisions that have shaped GST classification jurisprudence in India. Each case carries significant precedent value for businesses operating in similar sectors.