GST Calculator India — Goods & Services Tax Tool
Calculate your GST liability instantly with our GST Calculator India. Whether you are a business owner generating invoices or a consumer checking prices, this tool provides a precise breakdown of CGST, SGST, and IGST for both GST-inclusive and GST-exclusive amounts.
- Free Online Tool
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Understanding This Calculator
How GST is Calculated in India
The Goods and Services Tax (GST) is an indirect tax used in India on the supply of goods and services. It is a value-added tax levied on most goods and services sold for domestic consumption. The tax is collected by the Central (CGST) and State (SGST) governments separately, or as an integrated tax (IGST) for interstate transactions.
GST Calculation Formulas
Our online GST tool uses the following mathematical logic:
1. GST Exclusive (Add GST to Base Price)
GST Amount = (Original Cost × GST%) / 100
Net Price = Original Cost + GST Amount
2. GST Inclusive (Extract GST from Total Price)
GST Amount = Total Price − (Total Price / (1 + GST% / 100))
Net Price = Total Price − GST Amount
Understanding the GST Components
- CGST (Central GST): Collected by the Central Government on an intra-state sale (e.g., a transaction happening within Maharashtra).
- SGST (State GST): Collected by the State Government on an intra-state sale. It is typically equal to the CGST amount.
- IGST (Integrated GST): Collected by the Central Government for inter-state transactions (e.g., Maharashtra to Karnataka). It is the sum of CGST and SGST.
How to Use
- Enter the Total Amount in Indian Rupees (₹).
- Select the applicable GST Rate (5%, 12%, 18%, or 28%).
- Choose whether the amount is GST Exclusive (tax added on top) or GST Inclusive (tax already included in the price).
- Review the breakdown of CGST, SGST, and the final Total Amount.
Frequently Asked Questions
What are the common GST slabs in India?
The current standard GST slabs are 5%, 12%, 18%, and 28%. Some essential goods are taxed at 0%.
What is the difference between CGST and SGST?
CGST is the Central GST and SGST is the State GST. For intra-state sales, the total GST is split equally between the Central and State governments.
How do I calculate GST inclusive amount?
To find the GST inside a total price, use the formula: [Total Price - (Total Price / (1 + GST Rate/100))].
Is IGST different from CGST+SGST?
No, IGST is simply the sum of CGST and SGST, but it is applied to inter-state transactions instead of intra-state ones.
Can I use this for service invoices?
Yes, this calculator works for both goods and services as the GST logic remains the same.
What is Nil Rated GST?
Nil rated goods are those that are taxable at 0% GST, such as basic food items (grains, fresh vegetables, etc.).
Does GST apply to petroleum products?
Currently, petroleum products (petrol, diesel) are outside the ambit of GST in India and are subject to VAT and Excise duty.
What is the HSN code?
HSN (Harmonized System of Nomenclature) is an international 6-digit code system used to classify goods for tax purposes.
What is a GSTIN?
GSTIN is a unique 15-digit identification number assigned to every registered business under the GST regime.
How does the GST calculator handle 28% slab?
The logic is consistent across all slabs. For a 28% slab, it applies 14% as CGST and 14% as SGST for intra-state calculations.