GST Calculator
Calculate GST amount and total price
Calculator Inputs
Results
Enter values to see results
About GST Calculator
Goods and Services Tax (GST) is an indirect tax levied on the supply of goods and services in India. Our GST calculator helps you quickly calculate the GST amount, CGST (Central GST), SGST (State GST), and final price for any product or service. Whether you want to add GST to a base price or remove GST from the final price, this calculator makes it simple.
How Does GST Calculation Work?
-
1
Select calculation type: Exclusive (add GST) or Inclusive (remove GST)
-
2
Enter the amount and select applicable GST rate (0%, 5%, 12%, 18%, or 28%)
-
3
For exclusive: GST Amount = Original Amount × GST Rate
-
4
For inclusive: Original Amount = Total Amount ÷ (1 + GST Rate)
-
5
CGST and SGST are each half of the total GST amount
Example:
For a product priced at ₹10,000 (before GST) with 18% GST: GST Amount = ₹1,800 (CGST ₹900 + SGST ₹900). Final price = ₹11,800.
Key Benefits
Quick Calculation: Instantly calculate GST amount and final price
Business Planning: Price your products correctly with GST included
Invoice Preparation: Get accurate GST breakdown for invoices
Tax Compliance: Ensure correct GST charging as per applicable rate
Dual Mode: Both inclusive and exclusive calculation supported
Transparency: Clear breakdown of CGST and SGST components
Frequently Asked Questions
What are the different GST rates in India?
India has 5 GST slabs: 0% (essential items like milk, food grains), 5% (household necessities), 12% (computers, processed food), 18% (most goods and services including capital goods, IT services), and 28% (luxury items like cars, AC). Some items have cess in addition to GST.
What is the difference between CGST and SGST?
CGST (Central GST) goes to Central Government and SGST (State GST) goes to State Government. Both are equal to half of the total GST rate. For inter-state transactions, IGST (Integrated GST) is charged instead, which goes to Central Govt and is later distributed.
How do I know which GST rate applies to my product?
GST rates are categorized by HSN codes (for goods) and SAC codes (for services). Check the HSN/SAC code of your product/service on the GST portal to find the applicable rate. Most commonly, goods attract 12% or 18%, and services attract 18%.
Can I claim GST input credit?
Yes, registered businesses can claim input tax credit on GST paid on purchases and use it to offset GST liability on sales. You must have valid tax invoices and file GSTR-3B returns to claim ITC.
What is GST registration and who needs it?
Businesses with annual turnover above ₹40 lakhs (₹20 lakhs for services, ₹10 lakhs for NE states) must register for GST. E-commerce sellers, inter-state suppliers, and certain specified categories need GST registration regardless of turnover. Registration provides GSTIN number for tax compliance.
What is reverse charge mechanism in GST?
Reverse charge means the recipient pays GST instead of the supplier. Applies when buying from unregistered dealers, certain specified services (legal, CA services), and imports. Buyer must pay GST directly to government and can claim ITC if registered.
How to file GST returns?
Regular businesses file GSTR-1 (sales), GSTR-3B (summary), and annual GSTR-9. Composition scheme filers use GSTR-4. Due dates: GSTR-1 by 11th, GSTR-3B by 20th of following month. File online on GST portal with digital signature. Late filing attracts interest and penalty.
What is composition scheme under GST?
Small businesses with turnover up to ₹1.5 crores can opt for composition scheme. Pay flat GST rate (1% for manufacturers/traders, 5% for restaurants) on turnover. Cannot claim ITC, charge GST, or make inter-state sales. Quarterly returns, simpler compliance.
What is e-way bill and when is it required?
E-way bill is required for goods movement above ₹50,000 value. Generate on e-way bill portal before transporting goods. Valid for limited time based on distance (1 day per 200km). Required for both inter-state and intra-state movement in most states.
How is IGST different from CGST and SGST?
IGST (Integrated GST) applies on inter-state transactions and imports. CGST+SGST apply on intra-state transactions. IGST rate equals CGST+SGST rate. IGST is collected by Centre and distributed. For exports, IGST is zero-rated with refund available.
What happens if I pay wrong GST rate?
Paying lower GST rate: Pay differential tax plus 18% interest. File revised return or DRC-03 for voluntary disclosure. Tax department may issue notice. Paying higher rate: Claim refund through GST portal or adjust in future returns with proper documentation.
What is GST annual return and who must file it?
GSTR-9 is annual return reconciling monthly returns. All regular taxpayers must file by Dec 31. GSTR-9C (audited reconciliation) required if turnover exceeds ₹5 crores. Composition dealers file GSTR-9A. Contains details of supplies, ITC, tax paid throughout the year.