Exclusive GST with 10% Discount Example
On a ₹10,000 item with 10% discount at 18% GST: Gross ₹10,000 − Disc ₹1,000 = Taxable ₹9,000. GST @ 18% = ₹1,620. Invoice Total = ₹10,620 (CGST ₹810 + SGST ₹810).
GST Calculation
Enter pre-tax goods or services amountSelect standard India GST slab or enter a custom rate
Determine CGST + SGST intra-state split vs single integrated IGST
Which GST rate applies? GST rates are supply-specific and determined by official CBIC HSN/SAC classifications and notifications. This calculator evaluates the rate you select.
Even 50:50 central/state split for standard intra-state supply.
Inter-state supply / import: single integrated GST levied.
₹10,000.00 + (18% GST = ₹1,800.00) = ₹11,800.00 Total
| Scenario | Discount | Taxable | GST | Total | Savings |
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Build multi-item GST invoices with per-line discounts, inclusive/exclusive pricing, and instant PDF/CSV generation.
| # | Item Description | HSN/SAC | Qty | Unit Price (₹) | Mode | Discount | GST Slab | Taxable | GST | Total | Actions |
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* This tool generates billing invoices and calculation records. It is not an accounting ERP or statutory IRN e-invoice filing system.
Extract the exact pre-tax base amount and the embedded GST component from any MRP or final bill amount.
Pre-GST = ₹11,800.00 ÷ (1 + 18%) = ₹10,000.00 | GST Extract = ₹1,800.00
Under the Indian Goods and Services Tax (GST) framework, understanding whether your quoted price is tax-exclusive or tax-inclusive, and ensuring that trade discounts reduce taxable value before tax is applied, ensures clean financial accounting and accurate invoice totals.
On-invoice trade discounts are deducted from the gross value to establish the net taxable base: Taxable Value = Gross Value − Trade Discount.
Tax is calculated directly on the taxable base: GST Amount = Taxable Value × (Rate / 100) and Invoice Total = Taxable Value + GST.
Extract taxable base from a tax-inclusive sticker price: Taxable Value = Inclusive Amount ÷ (1 + Rate / 100) and GST = Inclusive − Taxable.
Supplies within the same state split GST equally into CGST (50%) and SGST (50%). Supplies across state borders attract a single IGST (100%).
On a ₹10,000 item with 10% discount at 18% GST: Gross ₹10,000 − Disc ₹1,000 = Taxable ₹9,000. GST @ 18% = ₹1,620. Invoice Total = ₹10,620 (CGST ₹810 + SGST ₹810).
On ₹11,800 inclusive at 18% GST: Base = ₹11,800 ÷ 1.18 = ₹10,000.00. Embedded GST = ₹1,800.00 (CGST ₹900.00 + SGST ₹900.00).
GST rates depend on the official CBIC HSN or SAC classification notifications.
| GST Slab | Supply Scope | Intra-State Split | On ₹10,000 Taxable |
|---|---|---|---|
| 0% (Exempt) | Unbranded fresh foods, milk, grain, municipal services | CGST 0% + SGST 0% | GST: ₹0 | Total: ₹10,000 |
| 5% (Essentials) | Packaged foods, transport services, life-saving medicines | CGST 2.5% + SGST 2.5% | GST: ₹500 | Total: ₹10,500 |
| 12% (Goods) | Processed goods, business class air tickets, apparel | CGST 6% + SGST 6% | GST: ₹1,200 | Total: ₹11,200 |
| 18% (Standard) | IT services, consulting, software, standard manufactured items | CGST 9% + SGST 9% | GST: ₹1,800 | Total: ₹11,800 |
| 28% (Luxury) | Automobiles, luxury items, specified entertainment | CGST 14% + SGST 14% | GST: ₹2,800 | Total: ₹12,800 |
The GST amount is calculated from the rate and values you enter. Applicable GST rates depend on product/service classification and official GST notifications. This tool is a calculation utility and does not replace GST registration, tax invoicing, return filing, or professional tax advice.