Goods and Services Tax (GST): Revolutionizing India’s Tax System

Before July 2017, buying a product in India meant paying a tangled web of taxes – excise duty here, VAT there, service tax on top, entry tax at state borders, and an octroi levy if the goods crossed into certain cities. The same cup of coffee, the same washing machine, the same mobile phone could cost different amounts in different states, simply because each state ran its own tax system. The Goods and Services Tax (GST) was designed to fix this mess. Rolled out on 1 July 2017, GST is a single, nationwide indirect tax that replaced more than a dozen earlier levies and brought the country under one tax umbrella. Nearly a decade in, it is worth understanding what GST really is, how it works, who runs it, and what it has changed for businesses, consumers, and the government.

What is GST and why it was introduced 🔗

GST is a comprehensive, multi-stage, destination-based indirect tax levied on the supply of goods and services. Introduced on 1 July 2017, it replaced a range of earlier taxes such as VAT, service tax, central excise duty, entertainment tax, and octroi, unifying the country’s tax structure. The guiding slogan – “One Nation, One Tax, One Market” – captures the ambition behind the reform: dismantle fiscal borders between states and create a single, seamless national market.

The rationale was both economic and administrative. The Kelkar Task Force on implementation of the FRBM Act, 2003 had pointed out that the earlier indirect tax system fragmented the tax base between the Centre and the States, inadequately taxed services that make up half the GDP, and produced cascading effects that pushed down the tax-GDP ratio. A cascading effect simply means “tax on tax” – a manufacturer paid excise, a wholesaler paid VAT on a price that already included excise, and so on. By the time a product reached the consumer, several layers of taxes had compounded into the final price.

GST was designed to break this chain. Under GST, the credit of tax paid on inputs at every stage of value addition is available for the discharge of GST liability on the output, ensuring that tax is charged only on the component of value addition at each stage. In practice, this is called the input tax credit mechanism, and it is the beating heart of how GST avoids double taxation.

The constitutional journey 🔗

GST did not appear overnight. It took nearly 17 years of debate and negotiation between the Centre and the states before it became law. The Constitution (122nd Amendment) Bill, 2014 was introduced to enable GST; it was passed by the Lok Sabha in May 2015, by the Rajya Sabha on 3 August 2016, and again by the Lok Sabha on 8 August 2016 with amendments. After ratification by more than 15 states, it received presidential assent on 8 September 2016 and was enacted as the 101st Constitution Amendment Act, 2016, conferring simultaneous power upon Parliament and State Legislatures to make laws governing GST.

This simultaneous power-sharing arrangement is constitutionally novel. Earlier, the Centre could levy excise duty and service tax, while states could levy sales tax or VAT on goods. GST collapses both powers into a shared framework – a major departure from the original scheme of fiscal federalism.

The three-part structure: CGST, SGST, and IGST 🔗

India’s GST is a dual model. It is structured into three main components: Central GST (CGST) levied by the Central Government on intra-state supplies, State GST or Union Territory GST (SGST/UTGST) levied by State Governments or Union Territories on intra-state supplies, and Integrated GST (IGST) levied by the Central Government on inter-state supplies, including imports, which is the sum of CGST and SGST/UTGST.

How the three components work together 🔗

Think of it this way. If a trader in Mumbai sells goods to another trader in Pune, that is an intra-state transaction. The GST on that sale is split into two equal parts: CGST goes to the Central Government, and SGST goes to the Maharashtra government. But if the same Mumbai trader sells to a buyer in Chennai, that is an inter-state transaction, and a single IGST is charged instead. The IGST is the aggregate of CGST and SGST, appropriated from the state where the supplies are consumed.

This last point is crucial. GST is destination-based, meaning the tax ultimately accrues to the state where the goods or services are consumed, not where they are produced. This shift – from origin-based to destination-based taxation – redistributes revenue towards consumer states and was one of the most politically sensitive aspects of the entire reform.

What stays outside GST 🔗

Not everything falls under the GST net. GST does not cover products such as petrol, diesel, aviation turbine fuel, natural gas, alcohol for human consumption, and crude oil; these items continue to be subject to VAT on sale of goods and excise duty on manufacturing, under the jurisdiction of State and Central Government taxation systems respectively. These exclusions were negotiated carve-outs, largely because states rely heavily on fuel and alcohol revenues and were unwilling to surrender them.

The GST Council: a constitutional innovation 🔗

If CGST, SGST, and IGST are the body of the GST system, the GST Council is its brain. The GST Council is a constitutional body responsible for making recommendations on issues related to the implementation of GST in India; its first meeting was held on 22-23 September 2016, and since then it has met periodically to deliberate on various issues.

Composition of the Council 🔗

The Council is designed as a joint forum of the Centre and the states. Under Article 279A, the Council consists of the Union Finance Minister as Chairperson, the Union Minister of State in charge of Revenue or Finance, and the Minister in charge of Finance or Taxation or any other Minister nominated by each State Government as members. The state representatives choose one among themselves as Vice-Chairperson for a period they decide.

Decision-making and weighted voting 🔗

The voting structure is where cooperative federalism is most visible. Every decision of the GST Council is taken by a majority of not less than three-fourths of the weighted votes of the members present and voting, with the vote of the Central Government carrying a weightage of one-third of total votes cast and the votes of all State Governments taken together carrying a weightage of two-thirds. This arrangement ensures neither the Centre can override state concerns unilaterally, nor can states ignore central perspectives, promoting consensus-building.

One important legal clarification came in 2022. A Supreme Court decision ruled that the recommendations of the GST Council are not binding on either the Union government or the states. The ruling reaffirmed that Parliament and state legislatures have simultaneous power to legislate on GST, and Council recommendations are the product of collaborative dialogue rather than diktats. In practice, however, recommendations are almost always adopted because of the high consensus threshold.

Functions of the Council 🔗

The scope of the Council’s work is wide. Under Article 279A(4), the Council makes recommendations on the taxes, cesses and surcharges that may be subsumed in GST, the goods and services that may be subjected to or exempted from GST, model GST laws, principles of levy and place of supply, threshold limits, GST rates including floor rates with bands, and special rates during natural calamities or disasters. It also establishes dispute-resolution mechanisms between the Centre and states.

The rate structure and its evolution 🔗

When GST began, the tax had multiple slabs – 0%, 5%, 12%, 18%, and 28%, with a special 3% for gold and a cess on luxury and sin goods. Critics argued this structure was too complex and created classification disputes. A famous illustration: popcorn attracted different rates depending on whether it was loose, packaged, or caramelised.

In September 2025, the structure was significantly simplified. As of 22 September 2025, GST follows a simplified structure with four standard rates: 0% and 5% for essential goods and services, 18% as the standard rate, and 40% for luxury and sin goods; this reform eliminated the 12% and 28% slabs. The changes were announced by Prime Minister Modi during his Independence Day speech in 2025 and implemented to boost consumption.

Benefits of GST 🔗

A unified national market 🔗

Before GST, trucks carrying goods across state borders had to stop at checkposts for tax clearances, sometimes waiting for hours. The removal of interstate tax barriers has improved efficiency for logistics companies, with various studies showing a reduction in logistics costs for e-commerce, manufacturing, and FMCG enterprises of between 20 and 30 percent. This is a quiet but enormous gain for competitiveness.

Formalisation and better compliance 🔗

GST’s digital backbone – the GSTN portal, e-way bills, and e-invoicing – has pulled many small businesses into the formal economy. As India’s former Chief Economic Advisor Arvind Subramanian noted, GST is possibly one of the few VAT systems in the world where matching of what the supplier says he sold and what the buyer says he bought can reduce evasion and non-compliance. A collateral benefit, he pointed out, was improved access to credit for small businesses, since digital tax records could be used to build creditworthiness.

Revenue growth 🔗

GST collections have grown steadily. In recent years, monthly GST revenues have breached an average of ₹1.5 lakh crore, strengthening the government’s fiscal position and hastening the transition of India’s economy into a digital one. Destination-based taxation has also helped create a more equitable distribution of revenue among states, favouring consumer states that earlier lost out under origin-based systems.

Challenges and criticisms 🔗

GST has not been a smooth ride, especially for smaller businesses.

Compliance burden on small enterprises 🔗

Filing returns, matching invoices, and managing digital records can be demanding for MSMEs. Small and medium-sized businesses had trouble adjusting to the new compliance standards, and SMEs found it challenging to navigate the complexity of GST reporting and maintain proper paperwork. Businesses in areas with poor internet connectivity or lower digital literacy have struggled the most.

Refund delays and cash flow pressures 🔗

Exporters and certain refund-heavy sectors often wait months for dues to be released, squeezing their working capital. The mechanism works in principle but has suffered procedural bottlenecks.

Frequent changes and state revenue concerns 🔗

Rules, notifications, and rate changes have been frequent. States initially feared loss of revenue from abolishing their independent tax powers; though the Centre promised compensation for five years, disputes have arisen, especially during the COVID-19 pandemic, over the timeliness and adequacy of payouts. The tension between cooperative federalism and central coordination surfaces most visibly around compensation and rate-setting decisions.

What GST means for public administration 🔗

For students and practitioners of public administration, GST is a case study in three things at once – fiscal federalism, institutional design, and tax policy execution. The GST Council is the first constitutional body of its kind in India, built on weighted voting and consensus. It demonstrates that even in a politically diverse country, a common economic framework can be negotiated and maintained. At the same time, it reveals the limits of that framework: when states disagree over compensation or when the Centre dominates rate decisions, the Council’s legitimacy is tested.

GST is also a reminder that tax reform is never a one-time event. Rate rationalisation, dispute resolution, inclusion of petroleum products, strengthening the GST Appellate Tribunal (GSTAT), the National Bench of which is situated at New Delhi, and bringing the informal economy more deeply into the formal net are all ongoing projects. The reform succeeds or fails not on the day it is launched, but on how it evolves.

What do you think? Do you believe the simplified two-slab GST structure introduced in September 2025 strikes the right balance between revenue generation and taxpayer simplicity? And how well, in your view, has the GST Council lived up to its promise of cooperative federalism – is it a genuine partnership between Centre and states, or a forum where central priorities tend to win?

References

1. https://en.wikipedia.org/wiki/Goods_and_Services_Tax_(India)
2. https://dor.gov.in/goods-and-services-tax
3. https://www.dor.gov.in/concept-note-gst
4. https://gstcouncil.gov.in/gst-council-0
5. https://taxsummaries.pwc.com/india/corporate/other-taxes
6. https://www.india-briefing.com/doing-business-guide/india/taxation-and-accounting/country-wise-tax-structure/goods-and-services-tax-gst
7. https://www.gstcouncil.gov.in/gst-council
8. https://www.constitutionofindia.net/articles/article-279a-goods-and-services-tax-council/
9. https://www.drishtijudiciary.com/to-the-point/ttp-constitution-of-india/article-279a-the-gst-council
10. https://pwonlyias.com/gst-council-article-279a/
11. https://vakilsearch.com/article/impact-of-gst-on-indian-economy/
12. https://www.imf.org/en/publications/fandd/issues/2018/06/impact-of-indias-new-gst-tax-on-the-economy-trenches
13. https://fi.money/guides/personal-finance/the-impact-of-gst-on-the-indian-economy
14. https://taxamicus.in/benefits-of-gst-in-the-economy-achievements-challenges/