GST (Goods and Services Tax) is a comprehensive indirect tax levied on the manufacture, sale, and consumption of goods and services across India. Implemented on July 1, 2017, it replaced multiple cascading taxes like VAT, service tax, and excise duty with a unified tax system.
Our free GST calculator helps businesses, retailers, and consumers accurately calculate CGST, SGST, and IGST for invoices, purchases, and tax filing purposes.
The most comprehensive GST tool online with detailed breakdowns, reverse calculation, and compliance tips
Goods & Services Tax (GST) is an indirect tax applied on the supply of goods and services in India. The tax is divided between Central GST (CGST) and State GST (SGST) for intra-state transactions, while IGST applies for inter-state transactions.
Reverse GST Calculation helps businesses determine the original price before tax was added. This is useful when you have the final price but need to know the pre-tax amount for accounting or input tax credit purposes.
1. Invoice Requirements: Every GST invoice must include GSTIN, HSN/SAC codes, taxable value, and tax rates.
2. Filing Deadlines: GSTR-1 (outward supplies) is due by the 11th, GSTR-3B (summary return) by the 20th of the following month.
3. Input Tax Credit: You can claim credit for GST paid on business purchases against your GST liability.
The Indian GST system has three components:
| GST Slab | Rate | Common Items |
|---|---|---|
| Nil Rate | 0% | Fresh vegetables, milk, eggs, newspapers |
| Lower Rate | 5% | Essential goods, packaged foods, footwear below ₹500 |
| Standard Rate | 12% | Processed foods, computers, mobile phones |
| Standard Rate | 18% | Most goods and services, AC restaurants, telecom |
| Premium Rate | 28% | Luxury items, automobiles, tobacco products |
Our advanced GST calculation tool offers three calculation methods:
Pro Tip: Use the invoice preview feature to see how your GST breakdown will appear on official invoices for better record-keeping.
Unlike basic GST calculators, our tool provides:
For a product priced at ₹10,000 with CGST+SGST:
For a service billed at ₹5,600 including GST:
Proper GST calculation is essential for:
Remember: Our GST calculator provides estimates only. For official tax filing, consult a GST practitioner or refer to the official GST portal (www.gst.gov.in).
CGST and SGST apply to intra-state transactions (tax shared between center and state), while IGST applies to inter-state transactions (tax goes entirely to central government).
Multiply the base amount by 0.18 (for IGST) or multiply by 0.09 twice (for CGST+SGST). Our calculator automates this with the correct breakdown.
Exports are zero-rated under GST, meaning no tax is charged but input tax credits can be claimed.
When the recipient (instead of supplier) is liable to pay GST, typically for unregistered dealers or specific services.
Our free online GST calculator is designed to help Indian businesses, accountants, and consumers accurately compute Goods and Services Tax liabilities. With features like reverse calculation, tax slab comparison, and invoice previews, it's the most comprehensive GST tool available online.
Whether you're a small business owner creating invoices, a consumer checking tax amounts, or a student learning about India's tax system, this tool provides instant, accurate calculations without any registration or cost.