GST Calculator (India)

Calculate GST-exclusive and GST-inclusive invoice amounts with CGST + SGST (intra-state) or IGST (inter-state) breakdown.

Total Invoice Amount (Incl. GST)
₹59,000.00
Total GST: ₹9,000.00 at 18% (GST Exclusive)
Net Taxable Value ₹50,000.00
Total GST (18%) ₹9,000.00
CGST (9%) + SGST (9%) ₹4,500.00 each
Gross Invoice Total ₹59,000.00
Inputs
₹ INR
Enter net pre-tax price (Exclusive mode) or gross MRP (Inclusive mode).
Standard CBIC GST Council slab.
Choose whether the entered amount already includes GST.
Determines CGST+SGST vs IGST invoice presentation.
Results & Graph
Total Invoice Amount (Incl. GST)
₹59,000.00
Total GST: ₹9,000.00 at 18% (GST Exclusive)
Net Taxable Value
₹50,000.00
Total GST (18%)
₹9,000.00
CGST (9%) + SGST (9%)
₹4,500.00 each
Gross Invoice Total
₹59,000.00

Invoice Cost & Tax Breakdown

Net Value vs. CGST & SGST
Graph 1 • Invoice Cost & Tax Breakdown Net Value vs. CGST & SGST
Net Taxable Amount: 50,000 INRCGST (9%): 4,500 INRSGST (9%): 4,500 INR Net Taxable Amount 50,000 INR CGST (9%) 4,500 INR SGST (9%) 4,500 INR
Graph 2 • Proportional Share Ring Net vs. tax/interest share
TOTAL 59.0k Net Taxable Amount 50.0k (84.7%) CGST (9%) 4.5k (7.6%) SGST (9%) 4.5k (7.6%)
Graph 3 • GST Tax Amount Across Standard India GST Slabs (5%, 12%, 18%, 28%) Statutory benchmark comparison across brackets or years
5% Essential Goods Slab (2.5% CGST + 2.5% SGST) ₹2,500 12% Standard Goods Slab (6% CGST + 6% SGST) ₹6,000 18% Services & Electronics Slab (9% CGST + 9% SGST) ₹9,000 28% Luxury & Sin Goods Slab (14% CGST + 14% SGST) ₹14,000
Summary: Net taxable value is ₹50,000.00 and GST is ₹9,000.00.
Summary: For an intra-state transaction with a net amount of ₹50,000.00 at 18% GST, the net taxable value is ₹50,000.00 and total GST is ₹9,000.00 (split equally into ₹4,500.00 CGST and ₹4,500.00 SGST), bringing the final invoice total to ₹59,000.00.
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Formula & Mathematical Methodology: Exclusive & Reverse (Inclusive) GST Formulas

Exclusive:   GST = Net × r100,   Inclusive:   Net = Gross1 + r100
Exclusive: GST = Net × (r/100), Gross = Net + GST; Inclusive: Net = Gross / (1 + r/100), GST = Gross − Net
  • Net: Taxable value before GST
  • Gross: Total invoice value including GST
  • r: Applicable GST slab percentage

Rounding: Rounded to 2 decimal places (paise).

Worked Example: ₹50,000 IT Consulting Invoice at 18% GST (Intra-State Exclusive)

An agency bills ₹50,000 net within the same state at 18% GST.

  1. Total GST = ₹50,000 × 0.18 = ₹9,000.
  2. CGST (9%) = ₹4,500; SGST (9%) = ₹4,500.
  3. Gross Invoice Total = ₹50,000 + ₹9,000 = ₹59,000.
Result: Total GST is ₹9,000 (₹4,500 CGST + ₹4,500 SGST) for a gross bill of ₹59,000.

Frequently Asked Questions

How do I remove 18% GST from a GST-inclusive price?

Never subtract 18% directly from the gross price. Instead, divide the gross amount by 1.18 to find the pre-tax net value, then subtract that net value from the gross amount.

Finance & Investing · India Tax & Invoicing

GST Calculator (India): inputs, method, and how to read the result

Calculate GST-exclusive and GST-inclusive invoice amounts with CGST + SGST (intra-state) or IGST (inter-state) breakdown.

Choose inputs for the case you are checking

The defaults are illustrative. Replace them with values for your case and keep the units shown beside each field.

  • Transaction Amount: Enter net pre-tax price (Exclusive mode) or gross MRP (Inclusive mode).
  • GST Slab Rate (%): Standard CBIC GST Council slab.
  • Calculation Mode: Choose whether the entered amount already includes GST.
  • Place of Supply: Determines CGST+SGST vs IGST invoice presentation.

What the calculation includes

With the default values shown, Total Invoice Amount (Incl. GST) is ₹59,000.00. The calculation follows Exclusive & Reverse (Inclusive) GST Formulas; the formula and variable definitions above show how the inputs combine.

One-input check: With the other defaults held constant, changing Transaction Amount from 50,000 ₹ INR to 55,000 ₹ INR changes Total Invoice Amount (Incl. GST) from ₹59,000.00 to ₹64,900.00. This is a comparison inside the calculator's stated model, not a prediction.

Where to use caution

  • Intra-state GST is divided equally between Central GST (CGST) and State/UT GST (SGST/UTGST).
  • Does not include GST Compensation Cess levied on specific sin/luxury goods.

Scope: India (CBIC GST Council Schedule) Check the assumptions and limitations against your situation before relying on the estimate.

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