GST in India: From Multiple Indirect Taxes to a Unified Tax System

GST in India: From Multiple Indirect Taxes to a Unified Tax System – A Legal and Practical Analysis of India’s Goods and Services Tax Framework

Summary: India’s Goods and Services Tax (GST), introduced on July 1, 2017, significantly reorganised the country’s indirect tax framework by integrating several Central and State levies into a coordinated constitutional and statutory system. GST operates as a destination-based tax on consumption through a dual structure comprising Central GST (CGST), State GST (SGST) or Union Territory GST (UTGST), and Integrated GST (IGST). Its constitutional foundation principally rests on Articles 246A, 269A and 279A, introduced through the Constitution (One Hundred and First Amendment) Act, 2016. A central feature of GST is the Input Tax Credit mechanism, which seeks to reduce cascading by permitting eligible taxes paid on inputs and input services to be credited against output tax liabilities subject to statutory conditions. GST has also transformed tax administration through digital registration, returns, electronic records and e-way bills. The Supreme Court’s decision in Union of India v. Mohit Minerals Pvt. Ltd. highlights GST’s constitutional and federal dimensions, particularly the status of GST Council recommendations and the legislative powers of Parliament and State Legislatures. Despite greater integration, continuing issues include multiple rates, classification disputes, compliance burdens, ITC controversies and fiscal-federal coordination. GST therefore represents an evolving constitutional, statutory and administrative framework rather than merely the replacement of several indirect taxes.

ABSTRACT

India’s indirect tax structure underwent a significant overhaul with the implementation of the Goods and Services Tax (GST) on July 1, 2017. Central Excise Duty, Service Tax, State Value Added Tax (VAT), Central Sales Tax, Entry Tax, Luxury Tax, and Entertainment Tax were among the various indirect taxes that were split between the Union and the States prior to GST. Many of these taxes were integrated into a coordinated constitutional and statutory structure by the GST framework. With an Input Tax Credit system meant to lessen cascading, GST is intended as a destination-based tax on the consumption of goods and services. [1]

The shift from the previous indirect tax system to the GST, its constitutional basis, the CGST/SGST/IGST model, the Input Tax Credit, digital compliance, and a few recent innovations are all covered in this blog. Along with discussing ongoing issues including rate classification, compliance difficulties, ITC disputes, and the balance between Union and State taxing powers, it also takes into account the Supreme Court’s ruling in Union of India v. Mohit Minerals Pvt. Ltd. According to the analysis, GST should be viewed as a growing constitutional and administrative structure rather than just as the replacement of many taxes.

Keywords: GST, CGST, SGST, IGST, Input Tax Credit, GST Council, Indirect Tax, Fiscal Federalism, Tax Compliance.

1. INTRODUCTION

In addition to being a crucial source of public funding, taxes allow governments to have an impact on the economy. Typically, transactions involving the supply or consumption of goods and services are used to collect indirect taxes. The separation of taxing authority between the Union and the States was a defining feature of India’s pre-GST system. A fragmented indirect-tax environment resulted from the application of different taxes to the production, sale, and provision of services. On July 1st, 2017, the Goods and Services Tax (GST) was implemented. GST is defined by the Central Board of Indirect Taxes and Customs (CBIC) as a destination-based tax on consumption that is imposed at several stages with credit for taxes paid at earlier stages, finally placing the burden on the final consumer. [1] As a result, the reform aimed to maintain the constitutional roles of the Union and the States while establishing a more cohesive framework for taxing the supply of commodities and services.

However, the phrase “unified tax system” needs to be interpreted cautiously. Legally speaking, GST is not a single tax levied at a single rate or under a single statute. Central GST (CGST), State GST (SGST) or Union Territory GST (UTGST), and Integrated GST (IGST) are the main components of India’s dual GST concept. [2]

2. THE PRE-GST INDIRECT TAX STRUCTURE

Prior to the GST, a number of state and federal indirect taxes coexisted. Among other central taxes, Central Excise Duty and Service Tax were included in GST. State VAT, Central Sales Tax, Entry Tax, Luxury Tax, and specific taxes on entertainment, advertising, and purchases were among the state taxes. [1]

In addition to creating various points of taxation and distinct compliance requirements, this system mirrored the constitutional distribution of taxing powers. Depending on the type and location of a transaction, a company that manufactures, sells, or provides services may be subject to different tax regulations. Tax cascading, which is typically defined as a tax burden being carried into the value on which a later tax was calculated, was a related problem. In an effort to solve this, the GST model included a credit mechanism that allows qualifying input tax payments to be deducted from output tax under certain legal requirements. [3]

3. CONSTITUTIONAL FOUNDATION OF GST

Because Parliament and State Legislatures shared the authority to impose indirect taxes, GST necessitated a constitutional reorganization . The main constitutional basis for GST was established by the Constitution (One Hundred and First Amendment) Act, 2016.

3.1 Article 246A – Legislative Power

Article 246A gives Parliament and State Legislatures the authority to enact laws pertaining to GST, according to the constitutional framework. Because all levels of government are involved in GST legislation, this clause is essential to India’s dual GST scheme.

3.2 Article 269A – Inter-State Supplies

GST on supplies used in interstate trade or commerce is covered by Article 269A. The constitutional system gives the Government of India the authority to tax and collect such GST, and it stipulates how it would be divided between the Union and the States according to the guidelines set forth by Parliament based on the GST Council’s recommendations. [4]

3.3 Article 279A – GST Council

Article 279A establishes the Goods and Services Tax Council. The Council offers the Union and the States an institutional venue for discussing and making recommendations on GST-related issues, such as rates, exemptions, and other facets of the tax system. As a result, the Council plays a significant role in the GST’s cooperative and fiscal-federal framework.

4. STATUTORY FRAMEWORK

4.1 Central Goods and Services Tax Act, 2017

The primary central legislative framework for the imposition and collection of CGST on intra-state supplies is provided by the Central Goods and Services Tax Act, 2017 (CGST Act). Supply, registration, tax invoices, input tax credit, assessment, payment, returns, refunds, appeals, and offences are all covered.

4.2 Integrated Goods and Services Tax Act, 2017

The framework for interstate supplies is provided by the Integrated Goods and Services Tax Act, 2017 (IGST Act). Maintaining the tax-credit chain is crucial when products or services are transported across states. [2]

4.3 State GST and UTGST

For the State portion of intra-State GST, each State has its own SGST laws. The foundation for UTGST in certain Union Territories without a legislature is provided by the Union Territory Goods and Services Tax Act, 2017.5. CGST, SGST, IGST AND UTGST

The operation of GST can be understood by distinguishing intra-State and inter-State supplies.For instance, the tax may typically be split into 9% CGST and 9% SGST if an intra-state taxable supply is subject to an estimated GST rate of 18%. IGST would typically be applied if the identical supply is an interstate supply and the appropriate rate is 18%. The figures above are merely an example; the actual rate is determined by the classification and applicable rate notification.

5. INPUT TAX CREDIT AND THE REDUCTION OF CASCADING

One of the most significant GST methods is the Input Tax Credit (ITC). To put it simply, if the legislative requirements and limitations are met, an eligible registered person may use the credit of tax paid on qualified inputs and input services against output tax liabilities.

Assume, for instance, that a firm pays ₹18,000 in qualifying GST after purchasing raw materials for ₹1,00,000.. It later sells the finished product for ₹1,50,000 plus ₹27,000 GST. If the ₹18,000 input tax is eligible for credit, the net output liability, before considering any other credits or adjustments, would be ₹9,000. The example demonstrates the basic value-added logic of the credit mechanis

ITC is nevertheless not automatic or unrestricted. The CGST Act and Rules prescribe conditions relating to documentation, receipt of supplies, tax payment and other statutory requirements. Restrictions and disputes concerning ITC have therefore become an important area of GST compliance and litigation.

6. GST IN PRACTICE: AN INTER-STATE TRANSACTION

Consider a manufacturer in Punjab selling machinery worth ₹10 lakh to a registered business in Maharashtra. Because the transaction is an inter-State supply where the statutory conditions are satisfied, IGST would ordinarily apply. The supplier collects IGST and the recipient may claim eligible ITC subject to the requirements of the GST law.

The example illustrates an important objective of the IGST mechanism: maintaining the credit chain across State boundaries while directing taxation towards the destination of consumption. CBIC’s GST materials describe IGST as the mechanism for inter-State supplies and emphasise preservation of the input-tax-credit chain. [2]

7. GST AND DIGITAL TAX ADMINISTRATION

GST has also transformed tax administration through digital compliance. Registration, return filing, invoicing, electronic records and other compliance processes are increasingly technology-driven. The e-way bill system is one example of this change.

The e-way bill framework generally requires prescribed information to be furnished electronically before movement of goods in specified circumstances, including where the consignment value exceeds the threshold prescribed by the Rules, subject to applicable exceptions. [5]

Digital administration has advantages for both tax authorities and taxpayers. Authorities can use transaction information to identify inconsistencies, while businesses can maintain standardised electronic records. At the same time, technology-dependent compliance can be difficult for smaller businesses and increases the importance of accurate invoices, reconciliations and timely filings.

8. JUDICIAL DEVELOPMENT: UNION OF INDIA v. MOHIT MINERALS PVT. LTD.

An important Supreme Court decision concerning the constitutional character of GST is Union of India v. Mohit Minerals Pvt. Ltd., (2022) 10 SCC 700. The case involved, among other questions, the legal status of recommendations made by the GST Council.

The Supreme Court explained the constitutional relationship between the Union and States in the GST framework and held that the recommendations of the GST Council are not, by themselves, binding on Parliament and State Legislatures. The Court’s reasoning emphasised the federal character of GST and the legislative powers preserved by Article 246A. [6]

The judgment is significant because it shows that GST cannot be understood only as an economic or administrative reform. It is also a constitutional arrangement involving legislative competence, inter-governmental coordination and fiscal federalism.

9. CONTEMPORARY DEVELOPMENTS

GST remains an evolving legal framework. The GST Council continues to issue recommendations and the Government continues to amend rules, notifications and administrative procedures in response to practical issues.

For example, the official GST Council materials relating to the 56th GST Council meeting record recommendations concerning changes in GST rates and measures intended to facilitate trade and compliance. [7] The GST Council’s official website also continues to publish newsletters, meeting materials and other updates, demonstrating that GST policy and administration remain dynamic.

This continuing evolution has a practical consequence: a GST answer that was legally accurate in 2017 may not necessarily reflect the position applicable today. Legal research in GST therefore requires checking the current Act, Rules, notifications, circulars and judicial decisions rather than relying solely on introductory material.

10. CRITICAL DISCUSSION

10.1 GST is a unified framework, not literally one tax

The description of GST as ‘One Nation, One Tax’ captures the broad reform objective but should not be treated as a literal description of the legal structure. GST consists of multiple components and operates through different statutes, tax rates and constitutional powers. The legal achievement is better described as harmonisation within a common framework.

10.2 Multiple rates and classification

GST contains multiple rates and exemptions. Where different rates apply to different classifications, disputes can arise over whether a product or service falls within one entry or another. Such disputes demonstrate that rate simplification and legal certainty remain important policy and administrative concerns.

10.3 Compliance burden

A common tax framework does not automatically mean that every taxpayer experiences simple compliance. Businesses must maintain proper invoices and records, reconcile transactions and comply with return and payment requirements. Smaller taxpayers may have fewer internal resources to manage these obligations.

10.4 Input Tax Credit disputes

ITC is essential to the value-added structure of GST, but the statutory conditions attached to it can create disputes. Errors in invoices, mismatches in records, questions concerning receipt of supplies and statutory restrictions can affect a taxpayer’s ability to claim credit. This creates a continuing need for clear rules and consistent administration.

10.5 Cooperative and fiscal federalism

GST requires continuing cooperation between the Union and States. The GST Council provides a constitutional forum for this coordination, while Mohit Minerals demonstrates that the constitutional relationship cannot be reduced to a system in which the Council’s recommendations automatically replace the legislative powers of Parliament and State Legislatures.

11. SUGGESTIONS

• Simplify compliance requirements, particularly for small and medium-sized taxpayers, without weakening safeguards against evasion.
• Provide clearer classification guidance and timely clarifications to reduce disputes concerning tax rates and exemptions.
• Maintain greater stability in GST rules and notifications so that businesses can plan transactions with reasonable legal certainty.
• Strengthen and streamline appellate and dispute-resolution mechanisms to reduce prolonged GST litigation.
• Preserve a predictable Input Tax Credit system while maintaining effective measures against fraudulent or ineligible claims.
• Continue improving GST technology and user interfaces so that digital compliance is accessible to taxpayers with different levels of technical capacity.

12. CONCLUSION

The introduction of GST in India was a major transformation of indirect taxation. The pre-GST framework involved several Central and State taxes operating through different taxable events and compliance structures. GST brought many of these taxes into a coordinated constitutional and statutory framework based on the concept of supply and supported by an Input Tax Credit mechanism.

The constitutional foundation created by the Constitution (One Hundred and First Amendment) Act, 2016, particularly Articles 246A, 269A and 279A, is central to understanding the legal structure of GST. The CGST, SGST, IGST and UTGST framework then provided the statutory machinery through which the reform operates.

GST has also changed the practical administration of indirect taxation. Electronic compliance, e-way bills, digital records and data-based administration have become important parts of the tax system. At the same time, challenges concerning multiple rates, classification, ITC, compliance costs and fiscal federalism remain relevant.

The Supreme Court’s decision in Mohit Minerals illustrates that GST must be understood within India’s constitutional structure as well as its economic objectives. The continuing recommendations and updates issued through the GST Council further demonstrate that GST is an evolving system rather than a completed reform.

Accordingly, GST can be understood as a significant step towards a more integrated indirect tax system, while recognising that legal certainty, simplified compliance, effective dispute resolution and continued coordination between the Union and States are necessary for the framework to achieve its objectives in practice.

13. REFERENCES

[1] Central Board of Indirect Taxes and Customs (CBIC), “Know About GST,” Government of India, [https://cbic-gst.gov.in/about-gst.html](https://cbic-gst.gov.in/about-gst.html).

[2] Central Board of Indirect Taxes and Customs (CBIC), “GST – Concept & Status,” Government of India, [https://cbic-gst.gov.in/pdf/gst-concept-status-ason01052017.pdf](https://cbic-gst.gov.in/pdf/gst-concept-status-ason01052017.pdf).

[3] Central Goods and Services Tax Act, 2017, Government of India / CBIC, [https://cbic-gst.gov.in/CGST-bill-e.html](https://cbic-gst.gov.in/CGST-bill-e.html).

[4] Constitution of India, arts. 246A, 269A and 279A; Constitution (One Hundred and First Amendment) Act, 2016, India Code, [https://www.indiacode.nic.in/](https://www.indiacode.nic.in/).

[5] Central Goods and Services Tax Rules, 2017, provisions relating to e-way bills, CBIC, [https://cbic-gst.gov.in/](https://cbic-gst.gov.in/).

[6] Union of India & Anr. v. M/s Mohit Minerals Pvt. Ltd. through Director, Civil Appeal No. 1390 of 2022, Supreme Court of India, judgment dated 19 May 2022, [https://api.sci.gov.in/supremecourt/2020/23083/23083_2020_4_1501_35969_Judgement_19-May-2022.pdf](https://api.sci.gov.in/supremecourt/2020/23083/23083_2020_4_1501_35969_Judgement_19-May-2022.pdf).

[7] Goods and Services Tax Council, “Recommendations of the 56th Meeting of the GST Council,” 3 September 2025, [https://gstcouncil.gov.in/recommendations-56th-meeting-gst-council-held-new-delhi](https://gstcouncil.gov.in/recommendations-56th-meeting-gst-council-held-new-delhi).

[8] Integrated Goods and Services Tax Act, 2017, Government of India / CBIC, [https://cbic-gst.gov.in/IGST-bill-e.html](https://cbic-gst.gov.in/IGST-bill-e.html).

[9] Union Territory Goods and Services Tax Act, 2017, Government of India / CBIC, [https://cbic-gst.gov.in/UTGST-bill-e.html](https://cbic-gst.gov.in/UTGST-bill-e.html).