GST Calculator
Add or remove GST from any amount. Shows CGST, SGST, and IGST split.
Total Amount (with GST)
₹11,800.00
GST Amount (18%)
₹1,800.00
Original Amount
₹10,000.00
Total with GST
₹11,800.00
GST Breakup
CGST (9%)
₹900.00
Intra-state
SGST (9%)
₹900.00
Intra-state
IGST (18%)
₹1,800.00
Inter-state
Note: Either CGST+SGST (intra-state) OR IGST (inter-state) applies — not both.
For reference only. Actual GST may vary. Consult a GST practitioner.
GST Calculator India — Add or Remove GST Instantly (2025)
India's Goods and Services Tax (GST), implemented in July 2017, unified the complex indirect tax structure into a single, streamlined system. Whether you are a business owner calculating the GST on an invoice, a consumer checking the tax on a purchase, or a professional needing to reverse-calculate the base price from an inclusive amount — our GST Calculator handles all cases instantly.
Frequently Asked Questions — GST
What are the GST rates in India?
India has four main GST slabs: 5% (essential goods — food grains, medicines, transport), 12% (processed foods, computers, mobile phones), 18% (most services, electronics, toiletries), and 28% (luxury goods, automobiles, tobacco). Some goods like fresh vegetables, milk, and eggs are exempt (0% GST).
What is the difference between CGST, SGST, and IGST?
For intra-state transactions (within same state): GST is split equally between CGST (Central GST) and SGST (State GST). For inter-state transactions (between states): only IGST (Integrated GST) applies, equal to the total GST rate. You pay either CGST+SGST OR IGST — never both.
How do I add GST to an amount?
To add GST to a base price: Total = Base Price × (1 + GST Rate/100). For an item costing ₹1,000 with 18% GST: Total = ₹1,000 × 1.18 = ₹1,180. GST amount = ₹180 (CGST ₹90 + SGST ₹90 for intra-state).
How do I remove GST from an inclusive price?
To extract the base price from a GST-inclusive amount: Base = Inclusive Amount × 100 / (100 + GST Rate). For ₹1,180 inclusive of 18% GST: Base = ₹1,180 × 100/118 = ₹1,000. GST amount = ₹1,180 − ₹1,000 = ₹180.
Who needs to register for GST?
Businesses with annual turnover above ₹40 lakh (goods) or ₹20 lakh (services) must register for GST. For special category states (Northeast, Himachal Pradesh, etc.), the threshold is ₹20 lakh (goods) and ₹10 lakh (services). E-commerce sellers and businesses making interstate supply must register regardless of turnover.
Disclaimer: GST rates are subject to change by the GST Council. Verify with official CBIC notifications for the latest rates.
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