Goods and Services Tax (GST)
Introduction to GST
Goods and Services Tax (GST) is a comprehensive indirect tax levied on the supply of goods and services across India. It replaced multiple cascading taxes like VAT, service tax, excise duty, and octroi. In ICSE Class 10, you learn to compute GST payable and input tax credit for intra-state and inter-state transactions.
Key Terms
- Taxable value — The price of goods or services before adding GST.
- CGST — Central GST (collected by the central government for intra-state supplies).
- SGST — State GST (collected by the state government for intra-state supplies).
- IGST — Integrated GST (collected by the central government for inter-state supplies).
- Input Tax Credit (ITC) — The GST paid on purchases, which can be deducted from the GST collected on sales.
Intra-State vs Inter-State Supply
| Feature | Intra-State (within same state) | Inter-State (across states) |
|---|---|---|
| Tax split | CGST + SGST (equal rates) | IGST (single rate) |
| Total rate | Sum of CGST and SGST rates | Same as total for intra-state |
| Example at 18% | 9% CGST + 9% SGST = 18% | 18% IGST |
Input Tax Credit (ITC) Mechanism
ITC ensures GST is a 'destination-based' tax with no cascading effect. The dealer collects GST on output (output tax) and pays GST on input (input tax). The net GST payable is:
Net GST payable = Output GST collected — Input GST paid
If the input GST exceeds the output GST, the excess is carried forward as credit.
Conditions for Availing ITC
- The buyer must possess a valid tax invoice.
- The goods/services must have been received.
- The supplier must have deposited the GST with the government.
- The return (GSTR-3B) must be filed.
Computation of GST — Step-by-Step
Step 1: Find the taxable value
If the price is inclusive of GST, use:
Taxable value = (Inclusive price × 100) / (100 + GST rate)
Step 2: Calculate GST amount
GST amount = Taxable value × (GST rate / 100)
Step 3: Split into CGST and SGST (intra-state)
CGST = SGST = GST amount / 2
Worked Examples
Example 1: Intra-State Transaction (Basic)
A dealer in Delhi buys goods worth ₹40,000 from a local supplier and sells them for ₹60,000 in Delhi. GST rate is 12% (6% CGST + 6% SGST). Find the GST payable.
Solution:
- Input GST = 12% of ₹40,000 = ₹4,800 (CGST = ₹2,400, SGST = ₹2,400)
- Output GST = 12% of ₹60,000 = ₹7,200 (CGST = ₹3,600, SGST = ₹3,600)
- Net CGST payable = ₹3,600 − ₹2,400 = ₹1,200
- Net SGST payable = ₹3,600 − ₹2,400 = ₹1,200
- Total GST payable = ₹2,400
Example 2: Inter-State Transaction
A dealer in Mumbai buys goods worth ₹80,000 from a supplier in Pune (intra-state) and sells them to a dealer in Jaipur for ₹1,20,000. GST rate is 18%.
Solution:
- Since purchase is intra-state (Maharashtra): CGST = 9% of ₹80,000 = ₹7,200, SGST = 9% of ₹80,000 = ₹7,200
- Since sale is inter-state (Mumbai to Jaipur): IGST = 18% of ₹1,20,000 = ₹21,600
- Input IGST = 0 (no inter-state purchase)
- ITC available from intra-state: CGST ₹7,200 + SGST ₹7,200
- But IGST output can be set off against CGST first, then SGST
- IGST payable = ₹21,600 − ₹7,200 (CGST ITC) − ₹7,200 (SGST ITC) = ₹7,200
- Net IGST payable = ₹7,200
Example 3: GST Inclusive Price
An article is priced at ₹5,900 inclusive of GST at 18%. Find the taxable value and GST.
Solution:
- Taxable value = (5,900 × 100) / (100 + 18) = 5,90,000 / 118 = ₹5,000
- GST = 18% of ₹5,000 = ₹900
- CGST = ₹450, SGST = ₹450
Comparison Table: Old Tax Regime vs GST
| Aspect | Old Regime | GST Regime |
|---|---|---|
| Tax on tax (cascading) | Yes — no ITC across taxes | No — full ITC allowed |
| Multiple taxes | VAT, excise, service tax, etc. | Single tax — GST |
| Compliance | Multiple returns | Unified return (GSTR-3B) |
| Tax burden | Higher due to cascading | Lower due to ITC |
Common Mistakes and Fixes
| Mistake | Fix |
|---|---|
| Applying IGST for intra-state supply | Always use CGST + SGST for same-state supply |
| Forgetting to split GST into CGST + SGST for intra-state | Divide total GST by 2 |
| Wrong ITC set-off order | IGST output → set off IGST input first, then CGST, then SGST |
| Not converting inclusive price to taxable value | Use the formula: (Inclusive × 100) / (100 + rate) |
ICSE Exam Focus
In ICSE examinations, GST problems are typically worth 8–12 marks (one long-answer question). Questions involve:
- Computing GST payable given purchases and sales.
- Finding taxable value from inclusive price.
- Determining IGST / CGST / SGST amounts.
- ITC computation with two or more transactions.
Blueprint for marks:
| Topic | Marks |
|---|---|
| Basics and definitions | 2 |
| Basic GST computation | 4 |
| ITC and net GST payable | 6 |
| Inclusive price problems | 4 |
| Inter-state with ITC adjustment | 6 |
Self-Test Questions
-
A trader in Bangalore buys goods worth ₹2,00,000 from a local supplier and sells them locally for ₹3,50,000. GST rate is 12%. Find the net CGST and SGST payable.
-
A dealer in Chennai purchases goods from Delhi for ₹1,50,000 (IGST @ 18%) and sells them locally for ₹2,40,000 (CGST 9% + SGST 9%). Compute net GST payable.
-
The price of a mobile phone inclusive of 18% GST is ₹11,800. Find the taxable value and the GST amount.
-
Explain the concept of Input Tax Credit and how it prevents cascading of taxes.
-
Distinguish between CGST, SGST, and IGST with suitable examples.
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A manufacturer in UP sells goods worth ₹5,00,000 to a dealer in UP (GST 12%). The dealer sells them to a retailer in Rajasthan for ₹6,50,000 (IGST 12%). Compute the net tax payable by the dealer.
Remember: GST questions in ICSE test your ability to correctly identify intra-state vs inter-state supplies and apply the ITC mechanism step-by-step. Practice with varied numbers to build speed and accuracy.
