About GST Calculator India
The Indian Goods and Services Tax (GST) system governs all commercial sales, services, and digital transactions across India. It replaced multiple indirect taxes such as Excise Duty, VAT, and Service Tax.
Businesses in India must calculate GST accurately when raising invoices, filing GSTR-1 and GSTR-3B returns, or claiming Input Tax Credit (ITC).
This dedicated Indian GST Calculator supports all state jurisdictions (38 state codes) and automatically splits tax between Central GST (CGST) and State GST (SGST) for local sales, or calculates Integrated GST (IGST) for interstate trade.
Indian GST Rate Structure & Formulas
GST Amount = Base Amount × (GST Rate ÷ 100)Taxable Amount = Total Amount × 100 ÷ (100 + GST Rate)Indian GST rates are structured into 4 main tiers: 5% (Essential Goods), 12% (Standard Items), 18% (Services & Machinery), and 28% (Luxury & De merit Goods).
Example: B2B Sale of Goods in India (₹50,000 at 18% GST)
An MSME in Mumbai sells electronic hardware to a wholesaler in Pune.
Total invoice value is ₹59,000. The ₹9,000 tax is split 50% to Central Government and 50% to Maharashtra State.