Accurate GST tax calculations are essential for issuing valid tax invoices, filing GSTR-1 & GSTR-3B returns, and claiming Input Tax Credit (ITC) under Indian GST law.
Calculate Goods and Services Tax (GST) amount, CGST, SGST, IGST split for standard rates (5%, 12%, 18%, 28%).
GST exclusive adds tax to net price. GST inclusive extracts original net price and tax portion from total price.
GST is an indirect destination-based tax levied on the supply of goods and services across India, replacing complex multi-layered taxes.
For Intra-State sales within the same state, GST is split 50:50 into Central GST (CGST) and State GST (SGST). For Inter-State sales between different states, Integrated GST (IGST) applies.
₹10,000 exclusive amount at 18% GST (Intra-state):
Final gross total is ₹11,800.
Packaged foods, transport, basic items.
IT services, corporate consulting, consumer electronics, invoices.
Automobiles, luxury goods, aerated drinks.
Use our ready-made GST Invoice Generator tool to build print-ready GST invoices with tax breakdown.
Calculate gross profit margin percentage, net profit amount, and cost markup percentage.
Calculate final price after discount, total customer savings, and percentage price reductions.
Calculate payment due date from invoice issue date and payment credit terms (Due on Receipt, Net 7, 15, 30, 45, 60).
Convert your calculations into ready-to-use compliance drafts & official legal documents.
Goods and Services Tax (GST) is a destination-based indirect tax levied on the supply of goods and services in India. Standard tax slabs include 5%, 12%, 18%, and 28%.
For intra-state transactions, total GST is divided equally into CGST (Central GST) and SGST (State GST). For inter-state supplies, IGST (Integrated GST) equals full GST rate.
Intra-state supply of professional services valued at ₹50,000 at 18% GST:
| Calculation Component | Amount Value |
|---|---|
| Net Transaction Amount | ₹50,000 |
| GST Rate | 18% |
| CGST Amount (9%) | ₹4,500 |
| SGST Amount (9%) | ₹4,500 |
| Total GST Tax Payable | ₹9,000 |
| Gross Invoice Value | ₹59,000 |
Exclusive GST means tax is added on top of the base product price. For example, ₹1,000 base + 18% GST = ₹1,180 total.
Inclusive GST means the listed price already contains tax. To extract tax from a ₹1,180 inclusive tag, divide by 1.18 to find ₹1,000 net price and ₹180 GST.
IGST (Integrated GST) is levied on inter-state transactions where supplier location and place of supply are in different states or UTs.