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How to Use the GST Calculator
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GST Exclusive (Add GST)
Enter your base price (before tax). The calculator adds GST to find the total payable amount. Use this when quoting prices to GST-registered businesses.
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GST Inclusive (Remove GST)
Enter the final price (including GST). The calculator extracts the base price and GST component. Use this to find the taxable value from a GST-inclusive price.
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CGST vs SGST vs IGST
For intra-state transactions, GST splits into CGST (Central) and SGST (State) — each at half the GST rate. For inter-state transactions, only IGST applies at the full rate.
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GST Rate Selection
GST has 5 main slabs: 3% (gold/precious metals), 5% (essentials, food), 12% (processed food, medicines), 18% (most services, electronics), 28% (luxury goods, sin goods).
GST Rate Slabs — Quick Reference
| GST Rate | Category | Common Examples |
|---|---|---|
| 0% (Nil) | Exempted | Fresh vegetables, milk, eggs, books, newspapers, healthcare |
| 3% | Precious Metals | Gold, silver, diamonds, precious stones, jewellery |
| 5% | Essential Goods & Services | Sugar, tea, coffee, edible oil, rail/air transport, insurance |
| 12% | Standard Goods | Frozen food, fruit juices, medicines, computers, LED lighting |
| 18% | Standard Services & Goods | Most services (CA, lawyers), electronics, paint, cement, telecom |
| 28% | Luxury & Sin Goods | Cars, tobacco, aerated drinks, casino, online gaming (real money) |