GST Calculator India - Calculate CGST, SGST, IGST
Calculate GST easily with our free online calculator. Add GST to your base price or remove GST from total amount. Get detailed CGST, SGST, and IGST breakdown instantly.
Quick GST Slabs Reference
What is GST (Goods and Services Tax)?
GST is India's unified indirect tax system that replaced multiple central and state taxes like VAT, Service Tax, Central Excise, and others. Implemented on July 1, 2017, GST follows the principle of "One Nation, One Tax" making India a single market.
GST is a destination-based, multi-stage tax collected at each point of sale. The end consumer bears the final tax burden, while businesses can claim Input Tax Credit (ITC) on purchases.
Types of GST in India:
GST Slabs in India 2024
India has a 4-tier GST structure with rates of 5%, 12%, 18%, and 28%. Additionally, there's a 0% rate for essential items and special rates for gold (3%) and precious stones (0.25%).
| GST Rate | Items Covered |
|---|---|
| 0% | Fresh vegetables, fruits, milk, bread, rice, wheat |
| 5% | Sugar, tea, coffee, edible oils, medicines, coal |
| 12% | Processed foods, mobile phones, computers, butter |
| 18% | Most services, restaurants, telecom, hair oil, soap |
| 28% | Luxury cars, tobacco, aerated drinks, AC, dishwashers |
Note: GST rates are subject to change based on GST Council decisions. Always verify the applicable rate for your specific goods or services from official sources.
How to Calculate GST - Formulas
1. Add GST (GST Exclusive)
When you have the base price and want to add GST:
Total Price = Base Price + GST Amount
Example: Base Price = ₹10,000, GST = 18%
GST Amount = 10,000 × 0.18 = ₹1,800
Total Price = 10,000 + 1,800 = ₹11,800
2. Remove GST (GST Inclusive)
When you have the total price (including GST) and want to find base price:
GST Amount = Total Price - Base Price
Example: Total Price = ₹11,800, GST = 18%
Base Price = 11,800 / 1.18 = ₹10,000
GST Amount = 11,800 - 10,000 = ₹1,800
GST Tips for Business Owners
Claim Input Tax Credit (ITC)
Always collect proper GST invoices from suppliers to claim ITC. This reduces your GST liability by the GST already paid on purchases.
File Returns on Time
File GSTR-1 by 11th (outward supplies) and GSTR-3B by 20th of next month. Late filing attracts ₹50/day penalty (₹20/day for nil returns).
Issue Proper Tax Invoices
Include GSTIN, HSN/SAC codes, itemized GST breakup (CGST+SGST or IGST), and invoice number. Use e-invoicing if turnover exceeds ₹5 crore.
Composition Scheme for Small Business
If turnover is below ₹1.5 crore (₹75 lakh for services), opt for Composition Scheme. Pay flat 1-6% GST without input credit hassle.
Frequently Asked Questions
What is GST and how does it work in India?
GST (Goods and Services Tax) is an indirect tax levied on supply of goods and services in India. It replaced multiple taxes like VAT, Service Tax, and Excise Duty. GST has 4 slabs: 5%, 12%, 18%, and 28%, plus a 0% rate for essential items.
What is the difference between CGST, SGST, and IGST?
CGST (Central GST) and SGST (State GST) are charged on intrastate transactions (within the same state) - split equally. IGST (Integrated GST) is charged on interstate transactions (between different states) - goes to central government.
How to calculate GST from total amount (inclusive)?
To find GST from inclusive amount: Base Amount = Total ÷ (1 + GST Rate/100). For example, if total is ₹11,800 with 18% GST: Base = 11800 ÷ 1.18 = ₹10,000. GST = ₹1,800.
What is the GST rate for most services?
Most services in India are taxed at 18% GST. This includes IT services, consulting, restaurants (AC), telecom, financial services, and professional services. Some essential services like healthcare and education are exempt.
Who needs to register for GST?
GST registration is mandatory if: (1) Annual turnover exceeds ₹40 lakh (₹20 lakh for services), (2) Interstate supply of goods/services, (3) E-commerce operators, (4) Casual taxable persons. Voluntary registration is also possible.
What items are exempt from GST (0% rate)?
Essential items are GST exempt: fresh vegetables, fruits, milk, bread, eggs, unprocessed food grains, healthcare services, educational services, public transport, and newspapers. These fall under the 0% (nil rate) category.