🧾 What is GST? Complete Guide to India's Tax System
GST — Goods and Services Tax — is a comprehensive indirect tax levied on the supply of goods and services across India. It was introduced on 1 July 2017, replacing a complex web of over 17 different central and state taxes including VAT, service tax, excise duty, octroi and entry tax. GST is a destination-based tax, meaning it is collected at the point of consumption rather than the point of production, and it follows a dual structure where both the Central Government and State Governments levy tax simultaneously.
The primary objective of GST was to create a unified national market by eliminating the cascading effect of multiple taxes (commonly known as "tax on tax") that significantly increased the cost of goods and services for end consumers. Before GST, a manufacturer would pay excise duty on production, a wholesaler would pay VAT on purchase and a retailer would pay additional taxes — all of which compounded and were passed on to the consumer. Under GST, the entire supply chain benefits from input tax credit, dramatically reducing this cascading effect.
India's GST structure follows a four-tier rate system: 5%, 12%, 18% and 28%, with some items attracting 0% (essential commodities like fresh fruits, vegetables and unbranded staples) and a special 3% rate for gold and precious stones. Additionally, luxury and sin goods in the 28% slab attract an additional Compensation Cess on top of the standard rate. Understanding which GST slab applies to your business transactions is essential for accurate billing, compliance and input tax credit claims.
Types of GST in India
India's GST framework consists of four types of tax that apply depending on whether a transaction is within a state or across state boundaries. Our Pro GST Calculator provides the complete breakdown for each type in every calculation:
- CGST (Central GST) — Levied by the Central Government on intra-state (within the same state) supplies. Revenue goes to the central government.
- SGST (State GST) — Levied by the State Government on intra-state supplies simultaneously with CGST. Revenue goes to the state government.
- UTGST (Union Territory GST) — Equivalent to SGST but applicable in Union Territories like Delhi, Chandigarh and Lakshadweep instead of SGST.
- IGST (Integrated GST) — Levied by the Central Government on inter-state (between two different states) supplies and imports. The revenue is then divided between the central and destination state governments.
For intra-state transactions, both CGST and SGST apply at equal rates — each being half of the total GST rate. For example, on an 18% GST transaction within a state, 9% is CGST and 9% is SGST. For inter-state transactions, only IGST applies at the full GST rate — 18% IGST on an 18% transaction.
❓ Frequently Asked Questions — 15 GST Expert Answers
What is the difference between GST exclusive and GST inclusive prices?
A GST exclusive price (also called the base price or taxable value) is the price of goods or services before GST is added. This is the amount on which GST is calculated. A GST inclusive price is the final price that includes GST — this is what the consumer pays. For example, if a product has a base price of ₹1,000 and attracts 18% GST, the GST exclusive price is ₹1,000, the GST is ₹180 and the GST inclusive price is ₹1,180.
What is CGST and SGST and how are they different from IGST?
CGST (Central GST) and SGST (State GST) are two components of GST that apply simultaneously on intra-state (within the same state) transactions. Each is charged at half the total GST rate. IGST (Integrated GST) applies on inter-state transactions (between two different states) at the full GST rate. For example, on an 18% GST transaction within Maharashtra, you pay 9% CGST to the central government and 9% SGST to the Maharashtra state government. On a transaction between Maharashtra and Delhi, you pay 18% IGST to the central government, which then allocates the state's portion to Delhi.
How do I calculate GST for a price of ₹1,000 at 18%?
To add 18% GST to ₹1,000: Multiply ₹1,000 by 0.18 to get the GST amount of ₹180. Add this to the base price: ₹1,000 + ₹180 = ₹1,180 total. The CGST component is ₹90 (9%) and the SGST component is ₹90 (9%) for an intra-state transaction, totalling ₹180. For an inter-state transaction, the full ₹180 is charged as IGST. Our calculator does all of this automatically — simply enter ₹1,000 in Add GST mode with the 18% slab selected.
What is the Remove GST feature and when should I use it?
The Remove GST (reverse calculation) feature is used when you have a GST-inclusive amount and need to find the original base price and GST component. This is commonly needed when you receive an invoice showing the total amount paid and need to extract the taxable value for your books of accounts. For example, if you paid ₹1,180 for a product and need to claim input tax credit, you need to know the base value is ₹1,000 and GST is ₹180. Enter ₹1,180 in Remove GST mode to get this breakdown instantly.
Which GST slab applies to restaurants and food services?
The GST rate for restaurants depends on the type of establishment. Regular standalone restaurants (non-AC) attract 5% GST without input tax credit. AC restaurants attract 5% GST. Restaurants in hotels with room tariffs above ₹7,500 per night attract 18% GST. Outdoor catering services attract 18% GST. Food delivery services from apps like Swiggy and Zomato attract 5% GST on the food value. It is always advisable to check the latest GST circulars as rates for food services have been revised multiple times.
What GST rate applies to software and IT services?
Software and IT services in India generally attract 18% GST. This includes custom software development, IT consulting, cloud services (SaaS, PaaS, IaaS), website design and development, digital marketing services, data processing services and IT support. Packaged software sold on physical media was earlier treated differently but is now also taxed at 18% under GST. For export of IT services, GST is zero-rated (0%) under the export of services provisions, making India's IT export industry effectively GST-free.
What is the GST registration threshold in India?
As of the latest regulations, businesses with an annual turnover exceeding ₹40 lakh for goods (₹20 lakh for services) are required to register for GST. For special category states in North-East India, the threshold is ₹20 lakh for goods and ₹10 lakh for services. Businesses engaged in inter-state supply, e-commerce operators and those making taxable supplies on behalf of others must register regardless of turnover. Voluntary GST registration is also available for businesses below the threshold who want to claim input tax credits.
What is Input Tax Credit (ITC) under GST?
Input Tax Credit (ITC) is the mechanism that allows a GST-registered business to reduce its tax liability by the amount of GST already paid on purchases used in the course of business. For example, if a manufacturer pays ₹180 GST on raw materials and charges ₹270 GST on the finished product, they need to pay only ₹90 to the government (₹270 minus ₹180 ITC). ITC is a fundamental feature of GST that eliminates the cascading tax effect and significantly reduces the overall tax burden on businesses and consumers.
How is GST calculated on MRP (Maximum Retail Price) products?
For products sold at MRP, the MRP is always GST-inclusive. The tax authorities require manufacturers to print the MRP inclusive of all taxes on the product packaging. To find the base price and GST component from an MRP, use the Remove GST calculation. Enter the MRP in our calculator with Remove GST mode selected and the applicable GST slab to instantly find the base price and the GST amount included in that MRP. This is useful for retailers and consumers who want to understand the actual tax component in the products they buy.
What GST applies to mobile phones and electronics?
Mobile phones attract 12% GST regardless of price. This was reduced from 18% in earlier GST revisions to make smartphones more affordable. Laptops and computers also attract 18% GST. Television sets attract 18% GST for screens up to 68cm (27 inches) and 28% for larger screens. Refrigerators, washing machines and air conditioners attract 18% GST. Accessories like chargers, cables and headphones generally attract 18% GST. Always verify with the latest GST rate schedule as electronics rates are subject to periodic revision.
What is the GST Compensation Cess and which products attract it?
The GST Compensation Cess is an additional levy charged over and above the 28% GST rate on certain luxury and demerit goods. It was introduced to compensate states for revenue losses during the GST transition period. Products attracting Compensation Cess include tobacco and tobacco products, pan masala, aerated drinks, coal, automobiles above certain engine capacity and luxury vehicles. The cess rates vary by product — for example, cigarettes can attract cess rates from 5% to over 290% depending on the type and length.
How does GST apply to freelancers and self-employed professionals?
Freelancers and self-employed professionals in India providing taxable services must register for GST if their annual turnover exceeds ₹20 lakh (₹10 lakh in special category states). Most professional services — writing, design, photography, consulting, coaching, programming — attract 18% GST. Freelancers exporting services to foreign clients qualify for zero-rated supply under GST, making their exports effectively GST-free. Registered freelancers can also claim input tax credit on GST paid for business expenses like software subscriptions, equipment and internet services.
What is the difference between SGST and UTGST?
SGST (State Goods and Services Tax) is levied by state governments on intra-state supplies within their territory. UTGST (Union Territory Goods and Services Tax) is the equivalent levy applied in Union Territories that do not have their own legislature — including Chandigarh, Dadra and Nagar Haveli, Daman and Diu, Lakshadweep and Andaman and Nicobar Islands. Delhi and Puducherry have their own legislatures and therefore use SGST. Both SGST and UTGST serve the same purpose and are charged at the same rate (half of the total GST rate) — the distinction is purely administrative.
How often do GST rates change in India?
GST rates in India are decided by the GST Council, a constitutional body comprising the Union Finance Minister and state Finance Ministers. The Council meets periodically — typically every few months — and can recommend changes to GST rates, exemptions and procedural rules. Since GST was introduced in 2017, rates on several goods and services have been revised multiple times. While our calculator covers all standard GST slabs, we recommend verifying the current applicable rate from the official GSTN portal (gst.gov.in) or the latest GST rate schedule for specific goods or services, particularly for high-value transactions.
Can I use this GST calculator for my business invoices?
Yes, absolutely. Our Pro GST Calculator provides accurate GST calculations for all standard Indian GST slabs (5%, 12%, 18% and 28%) in both Add GST and Remove GST modes, with complete CGST, SGST and IGST breakdowns. The calculations follow the standard GST formulas as prescribed by the GSTN. You can use these results to verify invoices, prepare quotations and understand your tax liability. For official GST returns, invoice generation and compliance filings, please use GSTN-approved accounting software or consult a registered GST practitioner.