GST Calculator — India
Calculate GST for all slabs with CGST/SGST or IGST breakdown.
GST Calculator India — Essential for Every Business Owner
Goods and Services Tax (GST) is India's unified indirect tax system, replacing VAT, Service Tax, Excise Duty and 17 other taxes from July 2017. Whether you are raising an invoice, checking if a quoted price includes GST, or splitting a transaction into CGST+SGST for intra-state or IGST for inter-state, this calculator does it instantly. With 5 tax slabs (0%, 5%, 12%, 18%, 28%) and different rules for goods vs services, our GST Calculator handles every scenario.
Frequently Asked Questions
What are the current GST rates in India? ▼
GST has 5 slabs: 0% (essential items — raw food, milk, salt, books), 5% (packaged food, transport, medicine), 12% (processed food, computers, textiles), 18% (most services including restaurants, hotels, software, financial services), 28% (luxury goods — cars, tobacco, AC, cement). There is also a 3% slab for gold and jewellery.
What is the difference between CGST, SGST and IGST? ▼
CGST (Central GST) and SGST (State GST) are levied for intra-state (within same state) transactions — each at half the GST rate. Example: 18% GST = 9% CGST + 9% SGST. IGST (Integrated GST) is levied for inter-state transactions at the full GST rate. The distinction matters for GST return filing and input tax credit.
How do I calculate GST on a ₹10,000 service? ▼
For 18% GST on ₹10,000 (exclusive): GST = ₹10,000 × 18% = ₹1,800. Total = ₹11,800. If intra-state: CGST ₹900 + SGST ₹900. If inter-state: IGST ₹1,800. For GST-inclusive amount (₹11,800): Base = ₹11,800 ÷ 1.18 = ₹10,000; GST = ₹1,800.
Who needs to register for GST in India? ▼
Mandatory registration if annual turnover exceeds: ₹40 lakh (goods, normal category states), ₹20 lakh (services, normal states), ₹10 lakh (special category states — NE states, Uttarakhand, J&K). Also mandatory if you supply inter-state, sell online via e-commerce, or are a casual taxable person regardless of turnover.
How to file GST returns as a small business? ▼
Most small businesses file: GSTR-1 (outward supplies, monthly/quarterly) and GSTR-3B (summary return, monthly). If opted for Composition Scheme (turnover < ₹1.5 crore): file quarterly GSTR-4. Annual return: GSTR-9 (due December 31). Filing is done via the GSTN portal at gst.gov.in.
Can I claim input tax credit on all GST paid? ▼
You can claim ITC (Input Tax Credit) on GST paid for business purchases and services — reducing your tax liability. You CANNOT claim ITC on: personal expenses, motor vehicles (except taxis/transports), food and beverages, club memberships and employee gifts. Always match ITC claims with GSTR-2B for accuracy.