GST Calculator India 2026
Calculate CGST, SGST, and IGST for all major GST slabs. Add GST to a net price or remove GST from an invoice total — free, instant, runs in your browser.
Quick answer
India GST is usually 5%, 12%, 18%, or 28% — split as CGST+SGST or IGST
For intra-state sales, GST is split equally between CGST and SGST. For inter-state sales, charge IGST at the full slab rate. Use the calculator below, then verify HSN and exemptions on CBIC.
Calculator
Need to find the GST rate for your product?
Use your HSN (Harmonized System of Nomenclature) code to look up the exact GST rate from the official government portal.
🔍 Search HSN/SAC Codes on CBIC PortalHow to use and formula
How to calculate GST in India
Choose add or remove mode, enter the amount, pick the GST slab, and toggle IGST for inter-state supply.
- Enter the pre-tax or tax-inclusive amount.
- Select the GST rate (5%, 12%, 18%, 28%, etc.).
- Enable IGST for inter-state; leave off for CGST+SGST split.
- Click Calculate for tax amount and total.
GST amount = net × (rate ÷ 100)
Gross total = net + GST amount
Net from gross = gross ÷ (1 + rate ÷ 100)
Example at 18%: ₹10,000 net → ₹1,800 GST → ₹11,800 total.
GST Rate Slabs — India 2026
| GST Rate | CGST | SGST | Common Items |
|---|---|---|---|
| 0% | 0% | 0% | Fresh vegetables, milk, eggs, unbranded food grains, educational services |
| 0.25% | 0.125% | 0.125% | Rough precious and semi-precious stones (diamonds, rubies) |
| 3% | 1.5% | 1.5% | Gold, silver, processed precious stones and jewellery |
| 5% | 2.5% | 2.5% | Packaged food, footwear under ₹1,000, economy restaurants, transport services |
| 12% | 6% | 6% | Processed food, mobile phones, business class air travel, textiles above ₹1,000 |
| 18% | 9% | 9% | Most services, electronics, IT services, restaurants with AC, computers |
| 28% | 14% | 14% | Luxury goods, automobiles, tobacco, cement, aerated drinks, casinos |
Note: For inter-state supply, IGST = CGST + SGST combined (e.g., 18% IGST instead of 9% CGST + 9% SGST).
Frequently Asked Questions — GST Calculator
How to add GST to an amount using the GST calculator?+
What is reverse GST calculation?+
What is the difference between CGST and SGST?+
Which items attract 0% GST in India?+
How do I calculate GST on gold and jewellery?+
What is the GST registration threshold for businesses?+
Common mistakes to avoid
Using 18% for every product
GST depends on HSN and item category. Food, gold, and exports can use 5%, 3%, 0.25%, or 0%.
Showing CGST+SGST on an inter-state invoice
Inter-state B2B supply should use IGST only at the applicable slab rate.
Reverse GST by subtracting 18%
From a GST-inclusive total, divide by 1.18 (for 18%), not subtract 18% of the gross amount.
Ignoring composition scheme limits
Composition dealers follow different rules. This calculator uses regular GST math for planning only.
Official source and review note
Rates and rules on this page were last reviewed in May 2026 against CBIC (Central Board of Indirect Taxes & Customs). Use the linked authority for filing, registrations, or address-specific compliance.
- GST slabs and HSN classifications change — verify before filing GSTR returns.
Calculate GST before you invoice
Use this tool for quotes, shopping, and invoice checks. For filing GSTR-1/GSTR-3B or complex credit rules, confirm with CBIC or your chartered accountant.