GST Calculator
Calculate GST with inclusive/exclusive modes and HSN support
Total GST
₹1,800
- Taxable value
- ₹10,000
- GST rate
- 18.00%
- CGST rate
- 9.00%
- SGST rate
- 9.00%
- IGST rate
- 0.00%
- CGST
- ₹900
- SGST
- ₹900
- IGST
- ₹0
- Total GST
- ₹1,800
- Total amount
- ₹11,800
What this calculator does
Calculate GST for inclusive and exclusive pricing. Split into CGST/SGST (intra-state) or IGST (inter-state). GST rates simplified in September 2025.
How it is calculated
\text{Exclusive: } GST = \text{Base Price} \times \frac{\text{GST Rate}}{100}Inclusive: GST = Price × GST Rate / (100 + GST Rate)
Worked example
Selling a product for ₹10,000 (exclusive of GST) with 18% GST
GST = 10,000 × 18/100 = ₹1,800
Invoice amount: ₹11,800 (CGST ₹900 + SGST ₹900 for intra-state)
- GST structure simplified to 0%, 5%, 18%, and 40% slabs (Sept 2025)
- Old 12% and 28% slabs merged into 5% or 18% for most items
- Intra-state: CGST + SGST (each half of total); Inter-state: IGST
- Input Tax Credit (ITC) available for businesses to offset GST paid on purchases
- Composition scheme for small businesses: 1% for traders, 5% for restaurants
Tax and compliance notes
- Businesses with turnover >₹40 lakh must register (₹20 lakh for services)
- GST returns: Monthly (GSTR-1, GSTR-3B) or Quarterly for small businesses
- Reverse charge mechanism for specific services
- E-invoicing mandatory for businesses with turnover >₹5 crore
Current rates
GST Structure (Sept 2025 Reform)
Primary slabs: 5% (essentials), 18% (standard), 40% (luxury/sin goods)
Source: GST Council 56th meeting, effective Sept 22, 2025
Zero-rated / Exempt
Fresh food, unbranded essentials, education, healthcare
Source: GST notifications
Talk to a CA
Not sure which registration or filing applies to you? Get a plan in 30 minutes.
- Which entity, licence and tax registrations you actually need
- Fixed prices and timelines, in writing
- A checklist of documents to prepare
- The call fee is adjusted against your first service