GST Calculator
GST Inclusive Amount?
GST will be added to amount
Inter-State Transaction?
CGST + SGST applies
Rate applies to:
Most services, electronics, restaurants
Total Amount (with GST)
How is it Calculated?
Where:
CGSTCentral Goods and Services Tax (collected by Central Government)SGSTState Goods and Services Tax (collected by State Government)IGSTIntegrated GST for inter-state transactions (collected by Central Govt, shared with states)GST (Goods and Services Tax) is a value-added tax levied on most goods and services. When goods are sold within a state, CGST and SGST are charged equally. For inter-state transactions, IGST is charged, which equals the combined rate.
Worked Examples
1Restaurant Bill (18% GST)
Result: CGST: ₹90 + SGST: ₹90 = Total: ₹1,180
2Remove GST from MRP (28%)
Result: Base Price = ₹1,000 | GST = ₹280
GST Calculator
Whether you're a business owner invoicing a client, a consumer checking if a quoted price is GST-inclusive, or an accountant reconciling input tax credits, a reliable GST calculator saves time and eliminates costly errors. India's Goods and Services Tax system replaced over a dozen indirect taxes with a unified structure — but understanding which rate applies, how the tax splits between central and state governments, and how to correctly present prices on invoices remains confusing for many. This tool handles all of that in seconds.
What is GST?
GST (Goods and Services Tax) is a comprehensive, multi-stage, destination-based indirect tax levied on every value addition in the supply chain. Introduced in India on July 1, 2017, it replaced a complex web of central and state taxes including Central Excise Duty, Service Tax, VAT, Entry Tax, and Octroi. A product priced at ₹10,000 might attract 18% GST, adding ₹1,800 to the total cost — but a registered business buyer can claim this ₹1,800 back as Input Tax Credit against their own GST liability.
How Does the Calculator Work?
Simply enter an amount, select the applicable GST rate (0%, 0.25%, 3%, 5%, 12%, 18%, or 28%), and choose whether the amount is GST-exclusive (tax will be added) or GST-inclusive (tax will be extracted). Toggle the inter-state switch if the transaction crosses state borders to see IGST instead of CGST+SGST. The calculator instantly displays the base amount, GST component, and final price with full breakdown.
Benefits of Using This Calculator
Create Accurate GST Invoices
Invoice errors are a leading cause of GST return mismatches, triggering notices from the GST portal. For a product priced at ₹10,000 with 18% GST, the invoice must show CGST of ₹900 and SGST of ₹900 separately for intra-state transactions — not a lump sum. This calculator gives you the exact figures required.
Correctly Price Products for the Market
Many small business owners mistakenly price products at their desired take-home amount without accounting for GST outgo. If you want to net ₹10,000, you need to charge ₹11,800 at 18% GST — not ₹10,000. The inclusive/exclusive toggle helps you set prices correctly from the start.
Verify Bills and Purchase Invoices
Before paying any vendor invoice, quickly verify whether the GST amount shown matches the applicable rate. Over-charged GST means you're paying more than required; under-charged GST may trigger compliance issues during audits. A 30-second check with this calculator can save significant amounts.
Real-World Example
A restaurant in Mumbai charges ₹10,000 for a corporate lunch. GST at 5% (for restaurants without ITC) would be ₹500, making the total bill ₹10,500 with CGST of ₹250 and SGST of ₹250 itemised separately. If the same food is supplied to a client in Delhi (inter-state), IGST of ₹500 would apply instead. Understanding this distinction is critical for correctly filing GSTR-1 and GSTR-3B returns.
Key GST Slabs in India
- 0%: Essential items — fresh fruits, vegetables, milk, eggs, unbranded food grains, healthcare and education services.
- 5%: Everyday essentials — packaged food, fertilizers, economy hotel stays (below ₹7,500/night), transport services.
- 12%: Processed food, computers, business class air travel, mobile phones, agarbatti.
- 18%: Most services and goods — restaurants (AC), electronics, software, professional services, telecommunications.
- 28%: Luxury and demerit goods — automobiles, tobacco, aerated drinks, high-end hotel stays (above ₹7,500/night), casinos.
Who Should Use This Calculator?
This GST calculator is essential for small business owners generating invoices, freelancers billing clients, e-commerce sellers calculating margins, accountants reconciling GST returns, procurement teams verifying vendor invoices, and consumers checking if quoted prices are GST-inclusive. Anyone involved in any commercial transaction in India benefits from understanding GST arithmetic.
Key Takeaways
- India has five main GST slabs: 0%, 5%, 12%, 18%, and 28% — plus special rates of 0.25% and 3% for specific goods.
- Intra-state transactions split GST equally between CGST and SGST; inter-state transactions attract IGST.
- Registered businesses can claim Input Tax Credit (ITC) on GST paid on purchases, reducing net liability.
- Businesses with annual turnover above ₹40 lakh (₹20 lakh for services) must register for GST.
- Exports are zero-rated — GST is not charged, and exporters can claim refund of input GST paid.