GST Profit Margin Calculator India — Net Margin After GST
CGST · SGST · IGST Breakdown — Invoice, Reverse GST & Business Summary
Many business owners confuse selling price with revenue — GST collected from customers is NOT your revenue, it's a liability owed to the government. True profit margin = (selling price excluding GST − total costs) ÷ selling price excluding GST. If your product sells for ₹1,180 (with 18% GST), your base price is ₹1,000 — that's your revenue. Calculate actual net margin after correctly removing GST here.
🧾 GST Calculator
How to Use GST Calculator India
Enter the base amount, select the GST rate slab (5%, 12%, 18%, 28%), choose Exclusive (add GST to amount) or Inclusive (extract GST from total), and select whether it's an Intra-state (CGST + SGST) or Inter-state (IGST) transaction. Get instant breakup — no login, no install.
How GST Calculator Works — Formula
GST Exclusive: GST Amount = Base × Rate/100 · Total = Base + GST
GST Inclusive (Reverse): Base = Total ÷ (1 + Rate/100) · GST = Total − Base
CGST & SGST = GST Amount ÷ 2 each (for intra-state transactions).
Example: ₹10,000 base at 18% → GST = ₹1,800 · CGST = ₹900 · SGST = ₹900 · Total = ₹11,800.
CGST vs SGST vs IGST — What's the Difference?
CGST (Central GST) goes to Central Government. SGST (State GST) goes to State Government. Both are charged on intra-state transactions (seller and buyer in the same state), each at half the total GST rate. IGST (Integrated GST) is charged on inter-state transactions and goes entirely to the Central Government, which then distributes to the destination state.
Real-Life GST Examples India 2025
🛒 Grocery (Milk, fresh vegetables): 0% GST — exempt essentials.
💊 Medicines, life-saving drugs: 5% GST — reduced rate for healthcare.
📱 Mobile phones, computers: 12% GST — standard electronics rate.
🍕 Restaurant services, AC restaurants: 5% or 18% GST — varies by type.
🏠 Under-construction flats: 5% GST (affordable) or 12% (premium).
🚗 Luxury cars: 28% GST + 12–22% Cess — highest tax bracket.
Frequently Asked Questions
How do I calculate profit margin excluding GST?
Step 1: Calculate revenue excluding GST = selling price ÷ (1 + GST rate%). Step 2: Profit = revenue (ex-GST) − total cost (ex-GST of inputs if ITC claimed). Step 3: Margin % = profit ÷ revenue (ex-GST) × 100. Mistake to avoid: NEVER calculate margin on GST-inclusive price. Example: ₹118 (incl. 18%) → revenue = ₹100, not ₹118.
What is the impact of GST on product pricing strategy?
Four factors: (1) Input ITC reduces effective cost. (2) Output GST is customer's liability (transparent). (3) Competition benchmark on ex-GST prices. (4) Composition scheme dealers cannot charge GST — competing at different cost structures. Key: compare prices exclusive of GST across competitors for fair analysis.
How does ITC reduce my effective cost of production?
Example: Buy raw material ₹50,000 + 18% GST ₹9,000 = ₹59,000. This ₹9,000 GST is ITC — you claim it back from GST collected. Effective raw material cost = only ₹50,000. So your actual cost of production = raw material cost (ex-GST) + labour + overheads (all ex-GST). ITC is why registered dealers can price more competitively than unregistered.
What is the impact of GST on e-commerce sellers?
E-commerce (Flipkart, Amazon): platform deducts TCS (Tax Collected at Source) at 1% of taxable value before payment. TCS can be claimed as credit in GST return. Marketplace also collects GST from buyer and remits for non-registered sellers. Registered e-commerce sellers must collect and pay GST themselves on every sale, file monthly GSTR-1.