Computation of GST, Full-fledged Problems
Problem 1: Computation of GST with ITC:
ABC Traders, a registered taxpayer in Maharashtra, provides the following information for August 2026:
| Particulars | Amount |
|---|---|
| Intra State taxable sales | ₹8,00,000 |
| Inter State taxable sales | ₹4,00,000 |
| Exempt sales | ₹1,00,000 |
| Purchase of goods within Maharashtra | ₹3,00,000 |
| Inter State purchase of goods | ₹2,00,000 |
| GST rate on all taxable supplies | 18% |
Assume all purchases are eligible for ITC. Calculate:
- Output GST liability
- Available ITC
- GST payable through cash
Solution
Step 1: Output GST
Intra State Sales = ₹8,00,000
CGST @ 9% = ₹72,000
SGST @ 9% = ₹72,000
Inter State Sales = ₹4,00,000
IGST @ 18% = ₹72,000
Therefore:
CGST = ₹72,000
SGST = ₹72,000
IGST = ₹72,000
Total Output GST = ₹2,16,000
Step 2: ITC on Purchases
Purchase within Maharashtra = ₹3,00,000
CGST ITC @ 9% = ₹27,000
SGST ITC @ 9% = ₹27,000
Inter State purchase = ₹2,00,000
IGST ITC @ 18% = ₹36,000
Total ITC:
CGST = ₹27,000
SGST = ₹27,000
IGST = ₹36,000
Total ITC = ₹90,000
Step 3: Set Off ITC
IGST liability = ₹72,000
IGST ITC = ₹36,000
Remaining IGST liability = ₹36,000
The remaining IGST liability is paid through cash.
CGST liability = ₹72,000
Less CGST ITC = ₹27,000
Cash CGST = ₹45,000
SGST liability = ₹72,000
Less SGST ITC = ₹27,000
Cash SGST = ₹45,000
Final Answer
| Particulars | Output Tax | ITC | Cash Payable |
|---|---|---|---|
| IGST | ₹72,000 | ₹36,000 | ₹36,000 |
| CGST | ₹72,000 | ₹27,000 | ₹45,000 |
| SGST | ₹72,000 | ₹27,000 | ₹45,000 |
| Total | ₹2,16,000 | ₹90,000 | ₹1,26,000 |
GST payable through Electronic Cash Ledger = ₹1,26,000
Problem 2: Comprehensive GST Computation:
XYZ Ltd., registered in Karnataka, provides the following information:
| Particulars | Amount |
|---|---|
| Intra State taxable sales | ₹10,00,000 |
| Inter State taxable sales | ₹6,00,000 |
| Exempt supplies | ₹2,00,000 |
| Intra State purchases | ₹4,00,000 |
| Inter State purchases | ₹3,00,000 |
| Purchase of office equipment within State | ₹1,00,000 |
| GST rate on taxable supplies | 18% |
All purchases are eligible for ITC and all goods are used exclusively for business purposes.
Calculate the net GST payable.
Solution
Step 1: Output Tax
Intra State taxable sales:
₹10,00,000 × 18% = ₹1,80,000
CGST = ₹90,000
SGST = ₹90,000
Inter State taxable sales:
₹6,00,000 × 18% = ₹1,08,000 IGST
Therefore:
CGST = ₹90,000
SGST = ₹90,000
IGST = ₹1,08,000
Total Output Tax = ₹2,88,000
Step 2: ITC
Intra State Purchases
₹4,00,000 × 18% = ₹72,000
CGST ITC = ₹36,000
SGST ITC = ₹36,000
Inter State Purchases
₹3,00,000 × 18% = ₹54,000 IGST ITC
Office Equipment
₹1,00,000 × 18% = ₹18,000
CGST ITC = ₹9,000
SGST ITC = ₹9,000
Therefore:
CGST ITC = ₹45,000
SGST ITC = ₹45,000
IGST ITC = ₹54,000
Total ITC = ₹1,44,000
Step 3: Set Off
IGST liability = ₹1,08,000
IGST ITC = ₹54,000
Remaining IGST liability = ₹54,000.
CGST liability = ₹90,000
CGST ITC = ₹45,000
Cash CGST = ₹45,000.
SGST liability = ₹90,000
SGST ITC = ₹45,000
Cash SGST = ₹45,000.
Final Answer
| Tax | Liability | ITC | Cash Payment |
|---|---|---|---|
| IGST | ₹1,08,000 | ₹54,000 | ₹54,000 |
| CGST | ₹90,000 | ₹45,000 | ₹45,000 |
| SGST | ₹90,000 | ₹45,000 | ₹45,000 |
| Total | ₹2,88,000 | ₹1,44,000 | ₹1,44,000 |
Net GST payable = ₹1,44,000
Problem 3: GST Computation with Different Tax Rates
A registered dealer makes the following sales during the month:
| Supply | Value | GST Rate |
|---|---|---|
| Intra State taxable goods | ₹5,00,000 | 18% |
| Inter State taxable goods | ₹3,00,000 | 12% |
| Intra State taxable goods | ₹2,00,000 | 5% |
| Exempt goods | ₹1,00,000 | Nil |
Purchases during the month:
| Purchase | Value | GST Rate |
|---|---|---|
| Intra State purchases | ₹2,00,000 | 18% |
| Inter State purchases | ₹1,00,000 | 12% |
| Intra State purchases | ₹1,00,000 | 5% |
All ITC is eligible. Calculate GST payable.
Solution
Output GST
Intra State supply at 18%:
₹5,00,000 × 18% = ₹90,000
CGST = ₹45,000
SGST = ₹45,000
Inter State supply at 12%:
₹3,00,000 × 12% = ₹36,000 IGST
Intra State supply at 5%:
₹2,00,000 × 5% = ₹10,000
CGST = ₹5,000
SGST = ₹5,000
Therefore:
CGST = ₹50,000
SGST = ₹50,000
IGST = ₹36,000
ITC
Intra State purchase at 18%:
₹2,00,000 × 18% = ₹36,000
CGST ITC = ₹18,000
SGST ITC = ₹18,000
Inter State purchase at 12%:
₹1,00,000 × 12% = ₹12,000 IGST ITC
Intra State purchase at 5%:
₹1,00,000 × 5% = ₹5,000
CGST ITC = ₹2,500
SGST ITC = ₹2,500
Total:
CGST ITC = ₹20,500
SGST ITC = ₹20,500
IGST ITC = ₹12,000
Set Off
IGST:
₹36,000 − ₹12,000 = ₹24,000 cash
CGST:
₹50,000 − ₹20,500 = ₹29,500 cash
SGST:
₹50,000 − ₹20,500 = ₹29,500 cash
Final Answer
Total GST payable through cash = ₹83,000
Problem 4: Full Problem Including Reverse Charge
PQR Ltd. has the following GST liabilities:
| Particulars | Amount |
|---|---|
| Output IGST | ₹1,00,000 |
| Output CGST | ₹70,000 |
| Output SGST | ₹70,000 |
| GST payable under Reverse Charge | ₹20,000 |
Available ITC:
| ITC | Amount |
|---|---|
| IGST ITC | ₹60,000 |
| CGST ITC | ₹30,000 |
| SGST ITC | ₹30,000 |
Calculate the amount payable through cash.
Solution
The tax payable under Reverse Charge Mechanism must be paid through the prescribed mechanism and cannot simply be discharged using existing ITC.
First, output tax is considered.
IGST liability = ₹1,00,000
IGST ITC = ₹60,000
Remaining IGST = ₹40,000
CGST liability = ₹70,000
CGST ITC = ₹30,000
Remaining CGST = ₹40,000
SGST liability = ₹70,000
SGST ITC = ₹30,000
Remaining SGST = ₹40,000
RCM liability = ₹20,000
Therefore:
Cash IGST = ₹40,000
Cash CGST = ₹40,000
Cash SGST = ₹40,000
RCM = ₹20,000
Total Cash Payment = ₹1,40,000
Final Answer
GST payable through cash = ₹1,40,000
The taxpayer may subsequently claim eligible ITC of tax paid under RCM, subject to the conditions of Section 16 of the CGST Act, 2017.
Problem 5: Examination Oriented Comprehensive Problem
A registered taxpayer provides the following information for a tax period:
| Particulars | Amount |
|---|---|
| Intra State taxable sales @ 18% | ₹12,00,000 |
| Inter State taxable sales @ 18% | ₹8,00,000 |
| Intra State taxable sales @ 5% | ₹4,00,000 |
| Exempt supplies | ₹2,00,000 |
| Intra State purchases @ 18% | ₹5,00,000 |
| Inter State purchases @ 18% | ₹3,00,000 |
| Intra State purchases @ 5% | ₹2,00,000 |
| Eligible ITC brought forward | ₹30,000 |
Calculate the net GST payable.
Solution
Step 1: Output Tax
Intra State sales @ 18%:
₹12,00,000 × 18% = ₹2,16,000
CGST = ₹1,08,000
SGST = ₹1,08,000
Inter State sales @ 18%:
₹8,00,000 × 18% = ₹1,44,000 IGST
Intra State sales @ 5%:
₹4,00,000 × 5% = ₹20,000
CGST = ₹10,000
SGST = ₹10,000
Therefore:
CGST = ₹1,18,000
SGST = ₹1,18,000
IGST = ₹1,44,000
Total Output GST = ₹3,80,000
Step 2: ITC on Current Purchases
Intra State purchases @ 18%:
₹5,00,000 × 18% = ₹90,000
CGST = ₹45,000
SGST = ₹45,000
Inter State purchases @ 18%:
₹3,00,000 × 18% = ₹54,000 IGST
Intra State purchases @ 5%:
₹2,00,000 × 5% = ₹10,000
CGST = ₹5,000
SGST = ₹5,000
Current ITC:
CGST = ₹50,000
SGST = ₹50,000
IGST = ₹54,000
Add eligible ITC brought forward = ₹30,000.
Assuming the brought forward credit is available as IGST credit:
Total IGST ITC = ₹84,000.
Step 3: Set Off
IGST liability = ₹1,44,000
IGST ITC = ₹84,000
Remaining IGST = ₹60,000
CGST liability = ₹1,18,000
CGST ITC = ₹50,000
Remaining CGST = ₹68,000
SGST liability = ₹1,18,000
SGST ITC = ₹50,000
Remaining SGST = ₹68,000
Final Answer
| Tax | Output Liability | ITC | Cash Payable |
|---|---|---|---|
| IGST | ₹1,44,000 | ₹84,000 | ₹60,000 |
| CGST | ₹1,18,000 | ₹50,000 | ₹68,000 |
| SGST | ₹1,18,000 | ₹50,000 | ₹68,000 |
| Total | ₹3,80,000 | ₹1,84,000 | ₹1,96,000 |
Net GST payable through cash = ₹1,96,000