GST or Goods and Services tax is an indirect tax charged on supply of goods and services in India. GST law in India unifies indirect tax replacing VAT, excise, and service tax. It's been 8 years since the introduction of GST law in India. Continue reading to learn A-Z about GST in India.
Key takeaways
- GST is an indirect tax which has replaced many indirect taxes in India such as the excise duty, VAT, services tax, etc.
- GST is a comprehensive, multi-stage, destination-based tax that is levied on every value addition.
- On 1st July 2017, the GST Law came into force and popular as ‘One Nation, One Tax’.
- e-Invoicing and e-way bill are part of GST compliance.
GST is known as the Goods and Services Tax. It is an indirect tax which has replaced many indirect taxes in India such as the excise duty, VAT, services tax, etc. The Goods and Service Tax Act was passed in the Parliament on 29th March 2017 and came into effect on 1st July 2017.
In other words, Goods and Service Tax (GST) is levied on the supply of goods and services. Goods and Services Tax Law in India is a comprehensive, multi-stage, destination-based tax that is levied on every value addition. After subsuming majority indirect taxes, GST is a single domestic indirect tax law for the entire country.
Before the Goods and Services Tax could be introduced, the structure of indirect tax levy on goods in India was as follows:

Under the GST regime, the tax is levied at every point of sale. In the case of intra-state sales, Central GST and State GST are charged. All the inter-state sales are chargeable to the Integrated GST.
Now, let us understand the definition of Goods and Service Tax, as mentioned above, in detail.
An item goes through multiple change-of-hands along its supply chain: Starting from manufacture until the final sale to the consumer.
Let us consider the following stages:

The Goods and Services Tax is levied on each of these stages making it a multi-stage tax.

A manufacturer who makes biscuits buys flour, sugar and other material. The value of the inputs increases when the sugar and flour are mixed and baked into biscuits.
The manufacturer then sells these biscuits to the warehousing agent who packs large quantities of biscuits in cartons and labels it. This is another addition of value to the biscuits. After this, the warehousing agent sells it to the retailer.
The retailer packages the biscuits in smaller quantities and invests in the marketing of the biscuits, thus increasing its value. GST is levied on these value additions, i.e. the monetary value added at each stage to achieve the final sale to the end customer.
Consider goods manufactured in Maharashtra and sold to the final consumer in Karnataka. Since the Goods and Service Tax is levied at the point of consumption, the entire tax revenue will go to Karnataka and not Maharashtra.
The GST journey began in the year 2000 when a committee was set up to draft law. It took 17 years from then for the Law to evolve. In 2017, the GST Bill was passed in the Lok Sabha and Rajya Sabha. On 1st July 2017, the GST Law came into force.
| Years | Key milestones |
| 2000 | PM Vajpayee set up a committee to draft GST law |
| 2006 | The then finance minister proposes GST introduction from April 1 2010 |
| 2008 | EC finalises dual GST to have separate levy, legislation |
| 2014 | GST bill reintroduced in parliament by Finance Minister |
| 2016 | GSTIN goes live |
| 2017 | Four supplementary GST bills were passed in both houses |
| 1st July 2017 | GST was launched |

GST has mainly removed the cascading effect on the sale of goods and services. Removal of the cascading effect has impacted the cost of goods. Let's look at some key advantages of GST:
There are three taxes applicable under this system: CGST, SGST/UTGST & IGST.
In most cases, the tax structure under the new regime will be as follows:
| Transaction | New Regime | Old Regime | Revenue Distribution |
| Sale within the State/UT | CGST + SGST/UTGST | VAT + Central Excise/Service tax | Revenue will be shared equally between the Centre and the State/UT |
| Sale to another State | IGST | Central Sales Tax + Excise/Service Tax | There will only be one type of tax (central) in case of inter-state sales. The Centre will then share the IGST revenue based on the destination of goods. |
In such a case, the dealer has to charge IGST of Rs.9,000. This revenue will go to Central Government.
The dealer has to collect Rs.6,000 as Goods and Service Tax, Rs.3,000 will go to the Central Government and Rs.3,000 will go to the Gujarat government since the sale is within the state.
GST rates refer to the percentage rates of tax imposed on the sale of goods or services under the CGST, SGST and IGST Acts. A business registered under the GST law must issue invoices with GST amounts charged on the value of supply.
The GST rates in CGST and SGST (For intrastate transactions) are approximately the same. Whereas, the GST rate in the case of IGST (For interstate transactions) is approximately the sum total of CGST and SGST rate.
The primary GST slabs for any regular taxpayers are presently pegged at 0% (nil-rated), 5%, 12%, 18% & 28%. There are a few lesser-used GST rates such as 3% and 0.25%.
In the earlier indirect tax regime, there were many indirect taxes levied by both the state and the centre. States mainly collected taxes in the form of Value Added Tax (VAT). Every state had a different set of rules and regulations.
Inter-state sale of goods was taxed by the centre. CST (Central State Tax) was applicable in case of inter-state sale of goods. The indirect taxes such as the entertainment tax, octroi and local tax were levied together by state and centre. These led to a lot of overlapping of taxes levied by both the state and the centre.
For example, when goods were manufactured and sold, excise duty was charged by the centre. Over and above the excise duty, VAT was also charged by the state. It led to a tax on tax effect, also known as the cascading effect of taxes.
The following table list down the taxes in pre-GST regime:
| Taxes which are subsumed by GST | Taxes which are still present post-GST |
| Central Excise Duty | Basic Customs Duty |
| Duties of Excise | Tax on Petrol and Diesel |
| Additional Duties of Excise | Tax on Tobacco and Alcohol |
| Additional Duties of Customs | Stamp Duty on Property |
| Special Additional Duty of Customs | Electricity Duty |
| Cess | Vehicle Tax |
| State VAT | Property Tax |
| *Central Sales Tax | |
| Purchase Tax | |
| Luxury Tax | |
| Entertainment Tax | |
| Entry Tax | |
| Taxes on advertisements | |
| Taxes on lotteries, betting, and gambling |
*Certain taxes such as the GST levied for the inter-state purchase at a concessional rate of 2% by the issue and utilisation of ‘Form C’ is still prevalent.
It applies to certain non-GST goods such as:
It applies to the following transactions only:
During the pre-GST regime, every purchaser, including the final consumer paid tax on tax. This condition of tax on tax is known as the cascading effect of taxes.
GST has removed the cascading effect. Tax is calculated only on the value-addition at each stage of the transfer of ownership. Understand what the cascading effect is and how GST helps by watching this simple video:
The indirect tax system under GST will integrate the country with a uniform tax rate. It will improve the collection of taxes as well as boost the development of the Indian economy by removing the indirect tax barriers between states.
Based on the above example of the biscuit manufacturer, let’s take some actual figures to see what happens to the cost of goods and the taxes, by comparing the earlier GST regimes.
Tax calculations in earlier regime:
| Action | Cost (Rs) | Tax rate at 10% (Rs) | Invoice Total (Rs) |
| Manufacturer | 1,000 | 100 | 1,100 |
| Warehouse adds a label and repacks at Rs.300 | 1,400 | 140 | 1,540 |
| Retailer advertises at Rs. 500 | 2,040 | 204 | 2,244 |
| Total | 1,800 | 444 | 2,244 |
The tax liability was passed on at every stage of the transaction, and the final liability comes to a rest with the customer. This condition is known as the cascading effect of taxes, and the value of the item keeps increasing every time this happens.
Tax calculations in current regime:
| Action | Cost (Rs) | Tax rate at 10% (Rs) | Tax liability to be deposited (Rs) | Invoice Total (Rs) |
| Manufacturer | 1,000 | 100 | 100 | 1,100 |
| Warehouse adds label and repacks at Rs. 300 | 1,300 | 130 | 30 | 1,430 |
| Retailer advertises at Rs. 500 | 1,800 | 180 | 50 | 1,980 |
| Total | 1,800 | 180 | 1,980 |
In the case of Goods and Services Tax, there is a way to claim the credit for tax paid in acquiring input. The individual who has already paid a tax can claim credit for this tax when he submits his GST returns.
In the end, every time an individual is able to claims the input tax credit, the sale price is reduced and the cost price for the buyer is reduced because of lower tax liability. The final value of the biscuits is therefore reduced from Rs.2,244 to Rs.1,980, thus reducing the tax burden on the final customer.
Apart from online filing of the GST returns, the GST regime has introduced several new systems along with it.
e-Way Bills
GST introduced a centralised system of waybills by the introduction of “E-way bills”. This system was launched on 1st April 2018 for inter-state movement of goods and on 15th April 2018 for intra-state movement of goods in a staggered manner.
Under the e-way bill system, manufacturers, traders and transporters can generate e-way bills for the goods transported from the place of its origin to its destination on a common portal with ease. Tax authorities are also benefited as this system has reduced time at check -posts and helps reduce tax evasion.
E-invoicing
The e-invoicing system was made applicable from 1st October 2020 for businesses in a phased manner. Currently, from 1st August 2023, this system was extended to those with an annual aggregate turnover of more than Rs.5 crore in any preceding financial years since 2017-18.
These businesses must obtain a unique invoice reference number for every business-to-business invoice by uploading on the GSTN’s invoice registration portal. The portal verifies the correctness and genuineness of the invoice. Thereafter, it authorises using the digital signature along with a QR code.
e-Invoicing allows interoperability of invoices and helps reduce data entry errors. It is designed to pass the invoice information directly from the IRP to the GST portal and the e-way bill portal. It will, therefore, eliminate the requirement for manual data entry while filing GSTR-1 and helps in the generation of e-way bills too.
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