Online GST Calculator (Inclusive & Exclusive)

Calculate GST inclusive and exclusive pricing online for goods and services in India. View instant CGST, SGST, and IGST breakdowns for standard tax rates (5%, 12%, 18%, and 28%) compliant with CBIC regulations.

How to Calculate GST in India

GST calculation is straightforward using official mathematical formulas:

• GST Exclusive Formula: GST Amount = (Base Amount * GST Rate %) / 100 | Invoice Total = Base Amount + GST Amount
• GST Inclusive Formula: Base Amount = Total Amount / (1 + (GST Rate % / 100)) | GST Amount = Total Amount - Base Amount

Understanding CGST, SGST, and IGST Splits

• CGST (Central GST): Collected by the Central Government on intra-state supplies (equal 50% split of applicable slab).
• SGST (State GST): Collected by the State Government on intra-state supplies (equal 50% split).
• IGST (Integrated GST): Levied on inter-state commerce and import transactions.

Worked Real-World Case Study

A software consulting firm in Mumbai invoices a client in Bengaluru for ₹50,000 (SAC 9983 @18% IGST). Base fee = ₹50,000 + IGST ₹9,000 = Total Billed ₹59,000. Client claims ₹9,000 Input Tax Credit (ITC).

Official Sources & Reviewer

Official Authority: Central Board of Indirect Taxes and Customs (CBIC) & GSTN Portal.
Reviewed by: FilingBy Indirect Tax Desk (Chartered Accountants). Last updated: August 2026.