Taxes subsumed The single GST subsumed several taxes and levies, which includes central excise duty,
services tax, additional customs duty,
surcharges, state-level
value added tax and octroi. Other levies that were applicable on inter-state transportation of goods have also been done away with in the GST regime. GST is levied on all transactions such as sale, transfer, purchase, barter, lease, or import of goods and/or services. India adopted a dual GST model, meaning that taxation is administered by both the Union and state governments. Transactions made within a single state are levied with Central GST (CGST) by the Central Government and State GST (SGST) by the State governments. For inter-state transactions and imported goods or services, an Integrated GST (IGST) is levied by the Central Government. GST is a consumption-based tax/destination-based tax; therefore, taxes are paid by the state where the goods or services are consumed not the state in which they were produced. IGST complicates tax collection for state governments by preventing them from directly collecting the tax owed to them from the central government. Under the previous system, each state could collect tax revenue directly from a single authority, making the process simpler.
Revenue Neutral Rate RNR is a single GST rate that generates exactly the same revenue as the pre-GST content taxes (Central and States combined) in a given base year. This ensures fiscal neutrality during the transition period. Formula (simple version used by the Committee): RNR = R/B where: R = Total revenue from subsumed taxes in the base year (₹ lakh crore, excluding liquor/property as it does not fall under GST and still exists with state VAT). B = Estimated GST tax base (taxable value of goods + services after exemptions, input credits, exports, thresholds, etc.). • revenue-neutral rate of 15–15.5% as suggested by the committee headed by Chief Economic Advisor Arvind Subramanian. The committee proposed 12% (lower tax), 17–18% for standard rate and 40% sin tax. On 1 July 2017, the GST Council, during the initial tax assessment, classified about 1,211 items (based on HSN codes/customs duty categories) into the following tax brackets: 0% or zero rate, 5%, 12%, 18% and 28%. Before the introduction of GST on 2017, the Arvind Subramanian-led committee had recommended 15.3% as the revenue neutral rate. That is, it was estimated that if the tax was collected at this rate on average, the government would not lose revenue. However, the subsequent GST tax reforms resulted in a reduction in tax on many items and a change in tax brackets, resulting in an effective tax rate of 11.6%. It is estimated that this will save people at least approximately Rs 1 lakh over their lifetime.
HSN code India is a member of
World Customs Organization (WCO) since 1971. From the outset, India originally used six-digit HSN codes to classify commodities for Customs and Central Excise. The Customs and Central Excise eventually added two more digits to make the codes more precise, resulting in an eight-digit classification. The purpose of HSN codes is to make GST systematic and globally accepted. The
Harmonized System of Nomenclature (HSN) code is used for classifying goods under the Goods and Services Tax (GST) in India. The HSN code is a six-digit code that uniquely identifies a product. The first two digits of the code identify the chapter, the next two digits identify the heading, and the last two digits identify the subheading. HSN codes eliminate the need to upload detailed descriptions of goods, thereby saving time and simplifying the filing process, especially as GST returns are increasingly automated. If a company has turnover up to in the preceding financial year, then it need not mention the HSN code while supplying goods on invoices. If a company has turnover more than but up to , then it needs to mention the first two digits of HSN code while supplying goods on invoices. If its turnover crosses then it needs to mention the first four digits of HSN code on invoices.
Rate As of 22 September 2025, GST in India 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. These changes were introduced by the Indian government on 3 September 2025 to boost consumption and mitigate the impact of
tariffs imposed by Trump administration, and came into effect later 22 September, onwards. The GST is imposed at variable rates on variable items. Preceding the reforms of September 2025, GST commenced with multiple slab rates, namely 0%, 5%, 12%, 18%, 28% and 40%. Several essential goods were exempt from GST, including dairy products, products of milling industries, fresh vegetables and fruits, meat products, and other basic groceries and necessities. Following the introduction of GST in July 2017, check-posts across the country were gradually abolished, enabling faster movement of goods and reducing logistics time. This was further supported by the subsuming of
octroi within the GST framework. To protect states' revenue interests, the Central Government, in the months preceding the GST rollout in 2017, proposed a compensation mechanism and anticipated the eventual inclusion of petroleum and petroleum products under GST. States were assured compensation for any revenue loss for five years from the implementation of GST. However, no binding legislation has yet been enacted to formalize this commitment. In an effort to ensure stability, the GST Council adopted a concept paper discouraging frequent changes to GST rates. The central government released to states as GST compensation. For the implementation, this amount was given to states to compensate for the revenue. Central government has had to face many criticisms for delays in compensation.
E-way bill An e-Way Bill is an electronic permit for shipping goods similar to a
waybill. It is an electronic bill; there is no requirement for a paper bill. It was made mandatory for inter-state transport of goods from 1 June 2018. It is required to be generated for every inter-state movement of goods beyond for merchandise worth above . Registered GST taxpayers can register in the e-Way Bill Portal using GSTIN. Unregistered persons or transporters can enrol in the e-Way Bill System by providing their
PAN and
Aadhaar. Suppliers, recipients and transporters can generate the e-Way Bill. The validity of e-Way Bill is fixed as one day for every 200 km or part thereof. The validity can be extended online before its expiration. Contents of Part-A of the Form EWB-01 cannot be edited or modified once generated. Part-B can be updated with vehicle details/ RR/Airway Bill etc.
Intra-state e-way bill The five states piloting the project—Andhra Pradesh, Gujarat, Kerala, Telangana and Uttar Pradesh, which together accounted for 61.8% of inter-state e-way bills—began mandatory intra-state e-way bill implementation on 15 April 2018 to further curb tax evasion. It was successfully introduced in Karnataka from 1 April 2018. The intrastate e-way bill paved the way for a seamless, nationwide single e-way bill system. Six more states—Jharkhand, Bihar, Tripura, Madhya Pradesh, Uttarakhand and Haryana—rolled it out from 20 April 2018. All states were mandated to introduce it by 30 May 2018.
Reverse charge mechanism Reverse Charge Mechanism (RCM) is a system in GST where the receiver pays the tax on behalf of unregistered, smaller material and service suppliers. The receiver of the goods is eligible for Input Tax Credit (ITC), while the unregistered dealer is not.
Goods excluded from the GST • Tobacco products: Products like cigarettes and other tobacco-based items attract separate taxes. • Alcohol for human consumption (i.e., not for commercial use). • Petrol and petroleum products (while the government stated during the introduction of GST in 2017 that these items would eventually be brought under GST, as of 2025, no concrete progress has been made): petroleum crude, high-speed diesel, motor spirit (petrol), natural gas, aviation turbine fuel. ==Revenue distribution==