GST Calculator
Calculate CGST, SGST, and IGST on any amount instantly
Understanding GST Calculation in India
The Goods and Services Tax (GST) is India's unified indirect tax system, replacing multiple taxes like VAT, Service Tax, and Excise Duty. Understanding how GST is calculated is essential for every business to ensure accurate invoicing and compliance.
GST Slab Rates
India follows a four-tier GST rate structure: 5% for essential goods, 12% for standard goods, 18% for most services and goods, and 28% for luxury and demerit items. Some goods like fresh food, milk, and healthcare services are exempt from GST.
CGST vs SGST vs IGST
For intra-state transactions, GST is split equally into CGST (Central) and SGST (State). For inter-state transactions, IGST (Integrated) is charged at the full rate. The total tax burden remains the same regardless of the transaction type.
Reverse GST Calculation
When you have a GST-inclusive price, reverse calculation helps extract the original price and tax component. The formula is: Original Price = Inclusive Price / (1 + GST Rate/100). This is useful for verifying invoices and computing input tax credit.
GST for Services
Most services in India attract 18% GST, including IT services, consulting, financial services, and telecom. Restaurant services in non-AC establishments attract 5% GST without input tax credit, while AC restaurants charge 5% GST.
Frequently Asked Questions
Common questions about GST calculation and how this tool works.
GST (Goods and Services Tax) is an indirect tax levied on the supply of goods and services in India. It is calculated by applying the applicable GST rate (5%, 12%, 18%, or 28%) to the taxable value of goods or services. For example, if an item costs Rs 1,000 and the GST rate is 18%, the GST amount is Rs 180, making the total Rs 1,180.
CGST (Central GST) and SGST (State GST) are levied on intra-state transactions (within the same state), with each being half of the total GST rate. IGST (Integrated GST) is levied on inter-state transactions (between different states) and equals the full GST rate. For example, at 18% GST: intra-state = 9% CGST + 9% SGST, inter-state = 18% IGST.
To extract GST from an inclusive (GST-included) price, use the formula: GST Amount = Inclusive Price - (Inclusive Price x 100) / (100 + GST Rate). For example, if the inclusive price is Rs 1,180 at 18% GST: Original Price = 1,180 x 100 / 118 = Rs 1,000, and GST = Rs 180.
India has four main GST slab rates: 5% for essential items like packaged food and footwear under Rs 1,000; 12% for processed food, mobile phones, and furniture; 18% for most goods and services including IT services, financial services, and restaurants; and 28% for luxury items like cars, tobacco, and aerated drinks. Some items like fresh food, milk, and healthcare are exempt at 0%.
Use intra-state calculation (CGST + SGST) when both the supplier and the buyer are in the same state. Use inter-state calculation (IGST) when the supplier and buyer are in different states, or for imports and exports. The total tax amount remains the same in both cases; only the split between central and state components differs.
Yes, the OneFinOps GST Calculator is completely free to use with no sign-up required. You can calculate GST on any amount, switch between inclusive and exclusive modes, toggle between intra-state and inter-state transactions, and use any of the four standard GST rates. All calculations are performed instantly in your browser.
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