Free GST Calculator India 2026
Calculate GST instantly — get CGST, SGST & IGST breakdown. Supports all slabs: 5%, 12%, 18%, 28%. Add or remove GST in one click.
Enter amount to calculate
Fill in the amount and rate on the left — results will appear here instantly.
GST Slab Rate Table — Common Goods & Services
Nil (0%)
0%Low Slab
5%Standard Slab
12%Standard Slab
18%Luxury Slab
28%Special Rates
3% / 0.25%What is GST? How is GST Calculated in India?
GST (Goods and Services Tax) is a comprehensive, multi-stage, destination-based indirect tax that was introduced in India on 1st July 2017. It replaced a complex system of multiple indirect taxes including VAT, Service Tax, Central Excise Duty, and several others. GST is governed by the GST Council, which consists of the Union Finance Minister and Finance Ministers of all states.
Types of GST in India
GST in India is divided into four types based on the nature of the transaction:
- CGST (Central GST): Collected by the Central Government on intra-state sales (sales within the same state). For example, a sale from a Delhi seller to a Delhi buyer.
- SGST (State GST): Collected by the State Government on intra-state sales. SGST and CGST are always charged together, each at half the total GST rate.
- IGST (Integrated GST): Collected by the Central Government on inter-state sales (sales between two different states). For example, a sale from Delhi to Mumbai. IGST equals the total GST rate.
- UTGST (Union Territory GST): Applicable in Union Territories like Chandigarh, Dadra & Nagar Haveli in place of SGST.
GST Calculation Formula
There are two common scenarios for GST calculation:
GST Amount = Original Price × GST Rate / 100
Total Price = Original Price + GST Amount
Example: ₹1,000 × 18% = ₹180 GST → Total = ₹1,180
Original Price = Total Price × 100 / (100 + GST Rate)
GST Amount = Total Price − Original Price
Example: ₹1,180 inclusive @ 18% → Original = ₹1,000, GST = ₹180
GST Rate Slabs in India (2026)
The GST Council has categorized goods and services into the following rate slabs:
- 0% (Nil): Essential commodities — fresh vegetables, milk, eggs, unbranded food grains, educational services, healthcare.
- 5%: Mass consumption items — packaged food, tea, coffee, economy travel, life-saving drugs.
- 12%: Standard goods — butter, ghee, mobile phones, business class air travel, namkeen.
- 18%: Most services and goods — IT services, AC restaurants, consumer durables, hair care products.
- 28%: Luxury goods and demerit goods — cars, cement, tobacco, luxury hotels, aerated beverages.
CGST and SGST Split Explained
For intra-state transactions, the GST is split equally between CGST and SGST. For example, if the GST rate is 18%, then CGST is 9% and SGST is 9%. For inter-state transactions, only IGST at the full 18% is charged — there is no split. The destination state then receives its share from the IGST collected by the Centre.
How to Use This GST Calculator
Using this free online GST calculator is simple: Enter the original amount in the "Original Amount" field, select the applicable GST rate (5%, 12%, 18%, 28%, or custom), choose whether you want to add GST to the amount or remove GST from an inclusive price, select Intra-State or Inter-State, and click Calculate. You will instantly see CGST, SGST (or IGST), and the total payable amount. You can also print the result as a PDF for your records.
Frequently Asked Questions
GST (Goods and Services Tax) is a unified indirect tax that was introduced in India on 1st July 2017, replacing multiple taxes like VAT, Service Tax, Central Excise, etc. It is a destination-based, multi-stage tax applied at each point of value addition, ensuring that the final tax burden falls on the end consumer.
CGST is collected by the Central Government, SGST by the State Government — both apply to intra-state (within same state) transactions and are each half the total GST rate. IGST (Integrated GST) applies to inter-state (between different states) transactions and equals the full GST rate, collected entirely by the Centre before being distributed to the destination state.
To add GST: Multiply the original price by the GST rate and divide by 100 to get the GST amount. Add it to the original price for the total. Formula: Total = Original × (1 + GST%/100). To remove GST from an inclusive price: Original = Inclusive Price × 100 ÷ (100 + GST%). This calculator does both automatically — just toggle the mode.
India has five main GST rate slabs: 0% (nil) for essential commodities like fresh vegetables, milk, and healthcare; 5% for mass-consumption items like packaged food and economy travel; 12% for items like butter, ghee, and mobile phones; 18% for most services, consumer durables, and IT services; and 28% for luxury/demerit goods like cars, cement, tobacco, and aerated drinks. Special rates of 3% apply to gold and 0.25% to diamonds.
Under the Reverse Charge Mechanism (RCM), the liability to pay GST shifts from the supplier to the receiver of goods or services. This applies in specific cases notified by the government — for example, when a registered business purchases from an unregistered supplier, or for specific services like legal services, transport, and import of services. The recipient must pay GST directly to the government and can later claim Input Tax Credit.
GST registration is mandatory if your annual turnover exceeds ₹40 lakhs for goods (₹20 lakhs for special category states) or ₹20 lakhs for services (₹10 lakhs for special states). Additionally, businesses making inter-state supply, e-commerce operators, casual taxable persons, and those liable under reverse charge must register regardless of turnover.
Input Tax Credit (ITC) allows registered GST taxpayers to claim credit for the GST paid on purchases (inputs) used for business. This credit can then be used to offset the GST liability on sales (output tax), reducing the total tax payable. For example, if you paid ₹18,000 GST on raw materials and collected ₹36,000 GST on finished goods, your net GST payable is only ₹18,000.
Most services in India attract 18% GST, including digital marketing services, advertising, IT services, software development, consulting, and professional services. E-commerce platforms also charge 18% GST on their commission. If you run a digital marketing agency and your annual revenue exceeds the threshold, you must register for GST, charge 18% GST on your invoices, and file monthly/quarterly GST returns (GSTR-1, GSTR-3B).