GST Calculator India (CGST, SGST & IGST Tax Split)
Calculate Goods and Services Tax (GST) inclusive and exclusive amounts with detailed CGST, SGST, and IGST breakdowns for Indian billing invoices.
Calculate GST Online Free
Enter invoice amount in ₹, select GST slab (5%, 12%, 18%, 28%), and compute exact tax additions or deductions with instant in-browser private math.
Open GST CalculatorQuick answer
Looking for a fast, free way to add or remove GST on billing invoices? Enter your base amount or total bill, select your GST tax slab (5%, 12%, 18%, 28%), and get instant CGST, SGST, or IGST tax amounts in real time.
Under Indian Goods and Services Tax laws, local sales within the same state are split 50% CGST + 50% SGST, while sales to other states apply 100% IGST. Runs 100% locally in your web browser with zero server tracking.
Instant, Compliant & Accurate GST Math
Engineered for shopkeepers, traders, freelancers, and businesses to generate accurate tax invoices.
Add GST or Remove GST in 1 Click
Easily calculate GST Inclusive (Gross Price) or GST Exclusive (Base Price) figures.
Automatic CGST, SGST & IGST Split
Computes exact 50-50 Central/State splits for intra-state billing or 100% IGST for interstate.
100% In-Browser Privacy
All invoice math happens inside your browser JavaScript. Zero financial amounts are saved remotely.
CGST, SGST & IGST Rules in India
Standard GST application scenarios:
| Transaction Type | Tax Component Split | View Mode | Applicability |
|---|---|---|---|
| 0% GST (Nil Rated / Exempt) | 0% Tax (No CGST / SGST) | Exempt Supply | Unpackaged food grains, milk, fresh fruits, books & judicial papers. |
| 5% GST (Essential Commodities) | 2.5% CGST + 2.5% SGST | Lower Rate Slab | Packed food, lifesaving medicines, tea/coffee, economy transport. |
| 12% GST (Standard Slab 1) | 6.0% CGST + 6.0% SGST | Standard Rate Slab | Processed food items, apparel above ₹1,000, business hardware. |
| 18% GST (Primary Services Slab) | 9.0% CGST + 9.0% SGST | General Services Slab | IT services, telecom, software, consulting, restaurants & photocopying. |
| 28% GST (Luxury & Sin Goods) | 14.0% CGST + 14.0% SGST | Highest Tax Slab | Automobiles, air conditioners, luxury electronics & cement. |
| Inter-State Sales (Other States) | 100% IGST (Full Tax Rate) | Integrated GST | Single integrated tax routed to Central Government for inter-state trade. |
Printing items like xerox copies and printing services standardly fall under the 18% GST slab in India.
How to calculate GST in India
Follow these 3 easy steps:
Step 1 - Enter Base or Total Amount
Type your product price in INR (₹) into the amount box.
Step 2 - Select GST Slab & Mode
Pick tax rate (5%, 12%, 18%, 28%) and choose Add GST (Exclusive) or Remove GST (Inclusive).
Step 3 - View Tax Breakdown
Get instant CGST, SGST, IGST breakdown and final invoice total.
Strict Private Browser Execution
All processing happens locally in your browser - your files are never sent to any server.
- Zero Server Uploads: All math operations run 100% locally in browser JavaScript.
- No Financial Logging: Amounts are wiped when you close or refresh the tab.
- No Watermarks: Export clean billing breakdowns.
Best practices for GST invoicing
Tips for accurate business bookkeeping:
Check HSN Code Slabs
Verify the correct HSN/SAC code tax percentage before billing clients.
Include GSTIN Number
Always list both seller and buyer 15-digit GSTIN numbers on B2B invoices.
Round to 2 Decimals
Round net tax amounts to 2 decimal places as per Indian GST rules.
Create GST Bill Books
Use our Bill Book Generator tool to auto-fill GST calculations on invoices.
Frequently Asked Questions
Answers to common queries about calculating GST in India.
How do I calculate GST Inclusive amount?
To calculate GST Inclusive price: Original Amount + (Original Amount x GST Rate / 100). For example, ₹1,000 at 18% GST = ₹1,000 + ₹180 = ₹1,180 total.
How do I calculate GST Exclusive (Remove GST) amount?
To calculate GST Exclusive (Base Amount): Total Amount x 100 / (100 + GST Rate). For example, for ₹1,180 with 18% GST, Base Amount = ₹1,180 x 100 / 118 = ₹1,000, and GST Tax = ₹180.
What is the difference between CGST, SGST, and IGST?
CGST (Central GST) and SGST (State GST) are split equally (50%-50%) for intra-state sales (within the same state). IGST (Integrated GST) applies at the full rate for inter-state sales (between two different states).
What are the standard GST tax slabs in India?
Standard Indian GST tax slabs are 0% (essential goods), 5% (processed food, printing services), 12% (electronics, clothing > ₹1k), 18% (IT services, consulting, general goods), and 28% (luxury items & automobiles).
Is this GST calculator free for shops and businesses?
Yes. The GST calculation tool is 100% free with instant live calculations for billing invoices and GST return filing.
Is this online tool free to use and do you store my uploaded documents?
Yes, this tool is 100% free with unlimited usage. All document rendering, calculation, and image processing run locally in your web browser memory with zero file storage on external servers.
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