India's Most Complete GST Tool
Forward & reverse GST · CGST / SGST / IGST breakdown · Invoice builder · Composition scheme comparison
| Rate | Category Examples |
|---|---|
| 0% | Fresh food, books, health/life insurance, dairy, eggs |
| 3% | Gold, silver, platinum, jewelry, precious metals |
| 5% | Staples, medicine, clothing ≤₹2500, transport, EV cars |
| 18% | Electronics, appliances, AC, cement, services, IT, hotels |
| 28% | Pan masala, tobacco products (special category) |
| 40% | Aerated drinks, luxury cars, SUVs, online gaming, casinos |
About the GST Calculator
Goods and Services Tax (GST) is India's unified indirect tax that replaced the earlier multi-layered tax system of VAT, Service Tax, Excise Duty, and others. Introduced on 1 July 2017, GST is levied at every stage of the supply chain, with Input Tax Credit (ITC) available to set off the tax paid on purchases against the tax collected on sales. This free GST calculator handles all standard slabs — 5%, 12%, 18%, and 28% — and includes GST 2.0 updates (the 12% slab has been eliminated for most goods).
The calculator covers four common use cases: adding GST to a base price, extracting GST from an inclusive price, computing a full invoice with CGST/SGST/IGST breakdown, and comparing the Regular GST scheme against the Composition Scheme. All calculations are instant and client-side — no data is sent to any server.
GST Slabs at a Glance
🟢 0% — Exempt
Essential goods: fresh fruits and vegetables, milk, eggs, bread, salt, educational services, healthcare, and public transport.
🟡 5% — Basic
Household necessities: packaged food, edible oils, sugar, tea, coffee, coal, and transport services (non-AC rail, economy air).
🟠 18% — Standard
Most manufactured goods and services: electronics, IT services, financial services, restaurants, hotel stays below ₹7,500.
🔴 28% — Luxury
Demerit and luxury goods: automobiles, tobacco, aerated drinks, luxury hotels above ₹7,500. Often carries an additional cess.
🔵 CGST + SGST
For intra-state supplies, GST is split equally: 50% to CGST (Central) and 50% to SGST (State). For inter-state: full rate as IGST.
⚖️ Composition Scheme
Businesses with turnover up to ₹1.5 Cr (₹75 L for services) can opt to pay a flat rate of 1–6% on turnover with minimal compliance.
Frequently Asked Questions
How do I calculate GST on a price exclusive of GST?
Multiply the base price by the GST rate percentage. For example, for a ₹1,000 product at 18%: GST = ₹1,000 × 18% = ₹180. Total price = ₹1,180. For intra-state supply this splits into CGST ₹90 + SGST ₹90.
How do I reverse-calculate GST from an inclusive price?
Divide the inclusive price by (1 + rate/100) to get the base price, then subtract to find the GST. For ₹1,180 inclusive at 18%: Base = ₹1,180 / 1.18 = ₹1,000. GST = ₹1,180 − ₹1,000 = ₹180.
What is the difference between CGST, SGST, and IGST?
For intra-state transactions (buyer and seller in the same state): GST is split equally into CGST (Central GST) and SGST (State GST), each at half the applicable rate. For inter-state transactions: the full GST rate applies as a single IGST (Integrated GST) collected by the Centre and later apportioned to the destination state.
Who should opt for the Composition Scheme?
Small businesses with annual turnover up to ₹1.5 crore (₹75 lakh for service providers) that primarily sell within their state, have limited input purchases, and want to reduce GST compliance burden. Composition dealers pay a flat rate (1% for traders/manufacturers, 5% for restaurants, 6% for service providers) on turnover but cannot claim Input Tax Credit and cannot issue a tax invoice.
What GST rate applies to software and IT services?
Software products and IT services (SaaS, consulting, development) generally attract 18% GST. This applies to both licensed software packages and service-based IT work. Export of IT services to clients outside India is zero-rated (0% GST) and eligible for LUT/bond without payment of tax.