GST Calculator — Add or Remove GST Online Free
Instantly calculate GST with CGST and SGST breakdown for all slabs.
What is GST?
GST (Goods and Services Tax) is a comprehensive indirect tax that was introduced in India on July 1, 2017, replacing multiple older taxes including VAT, service tax, and excise duty. It is a unified, destination-based tax levied on the supply of goods and services across the country. GST is administered by the GST Council, which includes representatives from central and all state governments. The tax operates under four main slabs — 5%, 12%, 18%, and 28% — plus a 0% exempt category for essential items. Businesses with cumulative annual turnover exceeding ₹40 lakh must register for a GSTIN (GST Identification Number).
GST Rates in India
| GST Rate | Category | Examples |
|---|---|---|
| 0% | Exempt | Fresh vegetables, milk, eggs, salt, books |
| 5% | Essential | Edible oil, sugar, tea, coffee, medicines, transport |
| 12% | Standard | Computers, processed food, mobile phones, business services |
| 18% | Standard | Most services, restaurants (AC), consumer electronics, construction |
| 28% | Luxury | Cars, tobacco, luxury hotels, aerated drinks, casinos |
How to Calculate GST
To Add GST (Exclusive)
- Select "Add GST" mode
- Enter base price (before tax)
- Select the applicable GST rate
- See GST amount and final price instantly
To Remove GST (Inclusive)
- Select "Remove GST" mode
- Enter the GST-inclusive price
- Select the GST rate
- See the original base price and tax amount
What is CGST and SGST?
For intra-state transactions (buying and selling within the same state), the applicable GST is divided equally into two portions: CGST (Central Goods and Services Tax) flows to the Central Government of India, while SGST (State Goods and Services Tax) goes to the respective State Government. For example, if a product carries 18% GST, you effectively pay 9% as CGST and 9% as SGST. For inter-state transactions, IGST (Integrated GST) applies instead, which is collected entirely by the Central Government and later apportioned to the destination state.
GST Inclusive vs Exclusive Price
- Exclusive price = the price before GST is added (base price). When a seller quotes "₹1,000 + GST", use the Add GST mode.
- Inclusive price = the final price that already includes GST. When you see an MRP of ₹1,180 and want to know the base price, use the Remove GST mode.
- Most B2B invoices use exclusive pricing (tax shown separately).
- Most B2C retail uses inclusive pricing (MRP includes all taxes).
GST Exempted Goods and Services
The 0% GST slab covers essential daily-use items to keep them affordable. Key exemptions include fresh fruits, vegetables, fresh meat and fish, milk, eggs, curd, natural honey, bread, salt, unbranded flour and rice, books, newspapers, handloom fabrics, and healthcare and educational services provided by schools and colleges. These necessities remain tax-free to ensure basic affordability across all income groups in India.