What is GST?
Goods and Services Tax (GST) is a comprehensive, multi-stage, destination-based indirect tax system implemented in India on July 1, 2017. It replaced a complex web of central and state taxes including excise duty, service tax, VAT, and others, creating a unified national market.
GST is levied at every stage of the supply chain but is designed to be borne by the final consumer. Businesses collect tax on behalf of the government and can claim credit for taxes paid on their purchases, eliminating the cascading effect of tax-on-tax.
The system has streamlined compliance, reduced logistics costs, and made India a single, unified market. It's administered by both central and state authorities through the GST Council.
GST Rate Slabs in India
India follows a five-tier GST structure designed to balance revenue needs with social welfare objectives:
| Rate | Category | Examples |
|---|---|---|
| 0% | Essential goods | Milk, eggs, fresh vegetables, bread, salt |
| 3% | Precious metals | Gold, silver, platinum, diamonds (cut & polished) |
| 5% | Common use items | Sugar, tea, coffee, coal, medicines, stationery |
| 12% | Standard goods | Computers, processed foods, mobile phones (below ₹25k) |
| 18% | Most goods & services | Services, electronics, cosmetics, IT products |
| 28% | Luxury & sin goods | Cars, tobacco, aerated drinks, AC units, luxury items |
Note: Some goods like petroleum products, alcohol for human consumption, and electricity remain outside GST's purview and are taxed by states separately.
How GST is Calculated
GST calculation depends on whether your amount is exclusive or inclusive of tax:
Total Amount = Base Amount + GST Amount
GST = ₹10,000 × 0.18 = ₹1,800
Total = ₹10,000 + ₹1,800 = ₹11,800
GST Amount = Total Amount − Base Amount
Base = ₹11,800 / 1.18 = ₹10,000
GST = ₹11,800 − ₹10,000 = ₹1,800
Understanding CGST, SGST & IGST
GST is divided into different components depending on whether the transaction is within a state or between states:
Levied by the Central Government on intra-state supply of goods and services. Always 50% of the total GST rate.
Levied by the State Government on intra-state supply. The other 50% of the total GST rate, collected alongside CGST.
Levied by the Central Government on inter-state supply and imports. Equals the full GST rate. Later apportioned between states.
The total tax burden remains the same whether CGST+SGST or IGST is applied. The difference is only in the collection mechanism and revenue distribution between central and state governments.
GST Calculation Examples
You have a meal costing ₹500 (base price)
GST @ 5%: ₹500 × 0.05 = ₹25
CGST (2.5%): ₹12.50 | SGST (2.5%): ₹12.50
Total Bill: ₹525
Phone priced at ₹25,000 + GST
GST @ 12%: ₹25,000 × 0.12 = ₹3,000
CGST (6%): ₹1,500 | SGST (6%): ₹1,500
Total Price: ₹28,000
Invoice shows ₹59,000 (inclusive of 18% GST)
Base Amount: ₹59,000 / 1.18 = ₹50,000
GST @ 18%: ₹9,000
CGST (9%): ₹4,500 | SGST (9%): ₹4,500
Benefits of GST
- Elimination of cascading tax: Credit for taxes paid at each stage prevents tax-on-tax.
- Simplified compliance: One unified system instead of multiple indirect taxes.
- Reduced logistics costs: No inter-state checkpoints or entry taxes; goods move freely.
- Competitive pricing: Lower tax burden can translate to better prices for consumers.
- Wider tax base: Brings more businesses into the formal economy with better documentation.
- Transparent system: Invoice matching and e-filing reduce evasion and increase accountability.