GST Calculator
Calculate Goods and Services Tax (GST) instantly. Add GST to a base price or remove GST from an inclusive price. This calculator supports all standard GST rates including 5%, 12%, 18%, and 28%. For other tax calculations, try our VAT calculator or sales tax calculator.
How to Calculate GST
- Identify the base price of the goods or services (excluding GST).
- Determine the applicable GST rate (5%, 12%, 18%, or 28%).
- To add GST: multiply the base price by the GST rate and add to the original price.
- To remove GST: divide the inclusive price by (1 + GST rate) to get the base price.
- The difference between the inclusive and base price is the GST amount.
Formula
Add GST:
GST Amount = Base Price x (GST Rate / 100)
Total Price = Base Price + GST Amount
Remove GST:
Base Price = Inclusive Price / (1 + GST Rate / 100)
GST Amount = Inclusive Price - Base Price
CGST = GST Amount / 2
SGST = GST Amount / 2
(For intra-state transactions)Example
A product costs 1,000 before GST. Calculate the total price with 18% GST:
Base Price = 1,000
GST Rate = 18%
GST Amount = 1,000 x (18/100) = 180
Total Price = 1,000 + 180 = 1,180
CGST (9%) = 90
SGST (9%) = 90
To reverse: If total is 1,180
Base Price = 1,180 / 1.18 = 1,000
GST Amount = 1,180 - 1,000 = 180Common GST Rates Table
| GST Rate | Category | Examples | GST on 1,000 |
|---|---|---|---|
| 5% | Essential goods | Sugar, tea, edible oil, transport | 50 |
| 12% | Standard goods | Butter, ghee, mobile phones, processed food | 120 |
| 18% | Most services | IT services, restaurants, financial services | 180 |
| 28% | Luxury/demerit goods | Cars, tobacco, aerated drinks, cement | 280 |
Frequently Asked Questions
What is GST?
GST (Goods and Services Tax) is a comprehensive indirect tax levied on the supply of goods and services. It replaced multiple cascading taxes with a single unified tax structure, making the tax system simpler and more transparent.
What is the difference between CGST, SGST, and IGST?
CGST (Central GST) and SGST (State GST) are charged equally on intra-state transactions (each is half the total GST). IGST (Integrated GST) is charged on inter-state transactions and equals the full GST rate.
How do I know which GST rate applies?
GST rates are determined by the HSN (Harmonized System of Nomenclature) code for goods or SAC (Services Accounting Code) for services. Essential items have lower rates (0-5%), while luxury items attract 28%.
Is GST the same as VAT?
GST and VAT are both consumption taxes, but GST is a comprehensive tax that replaced VAT and other indirect taxes in countries like India and Australia. VAT is still used in the EU and UK as a separate system.
Can I claim GST input tax credit?
Registered businesses can claim input tax credit on GST paid for business purchases against their output GST liability. This prevents tax cascading and reduces the effective tax burden on businesses.