Find the Exact GST Amount on Any Price – in Seconds
This GST calculator tells you precisely how much Goods and Services Tax is added to a price – or how much GST is hidden inside a price you already paid. Type in any amount, pick a rate, and the split appears instantly: CGST, SGST, IGST, net price, and final price, all at once.
How to Use This GST Calculator
- Enter the amount – type your price in rupees (₹). No commas needed.
- Choose the GST rate – pick 0%, 5%, 12%, 18%, or 28% from the dropdown.
- Select your mode – choose Add GST if the price you entered is before tax, or Remove GST if it already includes tax.
- Pick transaction type – Intra-state (within your state) shows CGST + SGST; Inter-state shows IGST.
- The result appears immediately – no button to click.
GST Rate Slabs at a Glance
India groups most goods and services into five rate bands. Here is a quick reference for FY 2025-26:
| GST Rate | Example Items | CGST | SGST / UTGST | IGST |
|---|---|---|---|---|
| 0% | Fresh vegetables, milk, unbranded cereals, books | 0% | 0% | 0% |
| 5% | Packaged food, economy class air tickets, fertilisers | 2.5% | 2.5% | 5% |
| 12% | Mobile phones, butter, frozen meat, business class air tickets | 6% | 6% | 12% |
| 18% | Restaurant meals (AC), IT services, paints, washing machines | 9% | 9% | 18% |
| 28% | Cars, tobacco, aerated drinks, luxury goods | 14% | 14% | 28% |
Source: GST Council / GSTN (gst.gov.in). Rates are as notified for FY 2025-26; check the official portal for any recent changes.
Worked Example – Both Ways
Scenario 1: Adding GST to a net price
A freelance designer charges ₹50,000 for a logo project. Their invoice must add 18% GST (IT/design services, intra-state sale in Maharashtra).
- Net (pre-tax) amount: ₹50,000
- CGST @ 9%: ₹4,500
- SGST @ 9%: ₹4,500
- Total GST: ₹9,000
- Invoice total (gross): ₹59,000
Scenario 2: Removing GST from a gross price
You paid ₹59,000 for the same service and need to separate the base amount for your books.
- Gross (tax-inclusive) amount: ₹59,000
- Net price: ₹59,000 ÷ 1.18 = ₹50,000
- Total GST embedded: ₹9,000 (CGST ₹4,500 + SGST ₹4,500)
How GST Is Calculated – The Formula
Both directions use straightforward arithmetic. Here are the two formulas:
-- Adding GST to a net price --
Gross Price = Net Price × (1 + GST Rate / 100)
GST Amount = Gross Price − Net Price
-- Removing GST from a gross price --
Net Price = Gross Price ÷ (1 + GST Rate / 100)
GST Amount = Gross Price − Net Price
For the CGST / SGST split (intra-state transactions), the total GST is divided equally between the Centre and the State:
CGST = GST Amount ÷ 2
SGST = GST Amount ÷ 2
For inter-state or import transactions, the full tax is collected as a single levy called IGST (Integrated GST):
IGST = Net Price × (GST Rate / 100)
CGST vs SGST vs IGST – What Is the Difference?
CGST (Central GST) and SGST (State GST) are collected together whenever a seller and buyer are in the same state. The revenue is split 50-50 between the central government and the state government.
When the seller and buyer are in different states – or one party is importing goods – a single tax called IGST (Integrated GST) applies at the full rate. The Centre then shares that revenue with the destination state.
For Union Territories (Delhi, Chandigarh, etc.) the state component is called UTGST, but the rate and split are identical to SGST.
Key GST Rules and Thresholds for FY 2025-26
- Registration threshold: Businesses with annual turnover above ₹40 lakh (goods) or ₹20 lakh (services) must register for GST. North-Eastern and special-category states have a lower threshold of ₹10 lakh.
- Composition scheme: Eligible small businesses (turnover up to ₹1.5 crore for goods; ₹50 lakh for some services) can pay a flat rate (1%–6%) instead of the standard slab.
- Input Tax Credit (ITC): Registered businesses can claim back the GST they paid on purchases, reducing their tax liability.
- Reverse charge mechanism: In certain notified transactions the buyer (not the seller) pays GST directly to the government.
- E-invoicing: Mandatory for businesses with turnover above ₹5 crore.
- HSN/SAC code: Every good uses a Harmonised System of Nomenclature (HSN) code; services use a Service Accounting Code (SAC). The code determines the applicable rate.
Practical Tips and Common Mistakes
- Always check the correct slab first. A popular mistake is applying 18% to restaurant bills at non-AC outlets – they attract 5% (without ITC).
- Don't confuse gross and net. If a quote says "₹1,000 + GST", the ₹1,000 is the net. If the invoice says "₹1,180 inclusive of GST", the gross is ₹1,180 – use Remove GST mode.
- Freelancers and consultants: Your professional fees are usually taxed at 18%. If your annual billing is under ₹20 lakh, you may not need to register – but check with a CA, because once you cross that threshold you must register within 30 days.
- Composition dealers cannot charge GST on their invoices – their customers cannot claim ITC against those purchases.
- The calculator is a guide, not a legal document. Always cross-check with a tax professional or the official GSTN portal for filing.
Your privacy is protected: every calculation runs entirely inside your browser. No number you enter is sent to any server or stored anywhere.
Use the GST calculator above to check any price in seconds – and never wonder again whether a quoted figure includes tax or not.