GST Calculator Online – Calculate Goods & Services Tax (5%, 12%, 18%, 28%)
Calculate GST exclusive and inclusive amounts with CGST, SGST, and IGST tax splits, live Chart.js donut chart, and itemized invoice breakdown table.
Add 18% GST to Net Base Price
50% Central GST + 50% State GST
GST Tax Invoice Breakdown
Statutory tax itemization suitable for B2B GST bills and retail receipts.
| Description | Tax Rate | Net Base Amount | CGST / SGST | Total Invoice Value |
|---|---|---|---|---|
| Goods & Services (HSN/SAC) | 18.00% | ₹50,000 | ₹9,000 | ₹59,000 |
How to Use this Calculator & Formula Breakdown
Step 1: Input Financial Parameters
Enter the base or gross amount in Rupees.
Step 2: Instant Client-Side Computation
Select GST rate slab (5%, 12%, 18%, 28%) and choose Add GST or Remove GST mode.
Step 3: Analyze Visual Breakdown & Amortization
Explore live interactive Chart.js donut chart, CGST/SGST split, and full invoice itemization table.
Mathematical Algorithm & Formula
Frequently Asked Questions (FAQs)
What is the difference between GST Exclusive and GST Inclusive pricing?
GST Exclusive means GST is added on top of the base product price (Base + Tax = Total). GST Inclusive means the listed price already contains the tax (Total is split into Pre-Tax Base Price and GST component).
How is GST split between CGST, SGST, and IGST?
For transactions within the same state (Intra-State), GST is split equally into 50% Central GST (CGST) and 50% State GST (SGST). For transactions between two different states (Inter-State), 100% Integrated GST (IGST) is charged.
What are the official GST rate slabs in India?
India has 4 main GST tax brackets: 5% (daily essentials, sugar, tea), 12% (processed food, computers), 18% (IT services, capital goods, restaurants), and 28% (automobiles, luxury items, gaming).
What is the mathematical formula to calculate GST?
For Add GST: GST Amount = (Base Price × Rate) / 100. For Remove GST: Base Price = Total MRP / (1 + Rate / 100) and GST = Total MRP - Base Price.
Can businesses claim Input Tax Credit (ITC) on GST paid?
Yes! Registered GST businesses can claim Input Tax Credit on the GST paid for business purchases to offset against their GST liability on sales.
What is the threshold limit for mandatory GST registration in India?
Businesses with an annual turnover exceeding ₹40 Lakhs for goods (₹20 Lakhs in special category states) and ₹20 Lakhs for services must register for GST.
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