Calculate Goods and Services Tax (GST) amounts accurately for your business transactions.
Introduction#
The GST Calculator helps Indian businesses:
- Calculate GST on products and services
- Determine CGST, SGST, or IGST amounts
- Calculate inclusive and exclusive prices
- Generate GST-compliant amounts
How to Use#
Basic Calculation#
- Enter the base amount (excluding GST)
- Select the GST rate (5%, 12%, 18%, or 28%)
- Choose transaction type (intra-state or inter-state)
- View the calculated GST and total amount
Reverse Calculation#
To find the base amount from GST-inclusive price:
- Select "GST Inclusive" mode
- Enter the total amount including GST
- Select the applicable GST rate
- View the base amount and GST components
GST Components#
Intra-State (Within Same State)#
For transactions within the same state:
- CGST (Central GST) - Goes to Central Government
- SGST (State GST) - Goes to State Government
- Each is half of the total GST rate
Example: 18% GST = 9% CGST + 9% SGST
Inter-State (Between States)#
For transactions between different states:
- IGST (Integrated GST) - Single tax to Central Government
- Equals the full GST rate
Example: 18% GST = 18% IGST
GST Rate Categories#
| Rate | Common Items |
|---|---|
| 0% | Essential food items, healthcare |
| 5% | Basic necessities, transport |
| 12% | Processed foods, computers |
| 18% | Most services, electronics |
| 28% | Luxury items, automobiles |
Calculation Examples#
Example 1: Product Sale (Intra-State)#
- Product value: Rs. 10,000
- GST Rate: 18%
- Transaction: Within same state
Calculation:
- CGST (9%): Rs. 900
- SGST (9%): Rs. 900
- Total GST: Rs. 1,800
- Invoice Total: Rs. 11,800
Example 2: Service (Inter-State)#
- Service value: Rs. 50,000
- GST Rate: 18%
- Transaction: Between states
Calculation:
- IGST (18%): Rs. 9,000
- Invoice Total: Rs. 59,000
Example 3: Reverse Calculation#
- Customer paid: Rs. 11,800 (inclusive)
- GST Rate: 18%
Calculation:
- Base amount: Rs. 10,000
- GST: Rs. 1,800
Best Practices#
For Invoicing#
- Always verify correct GST rate for your product/service
- Use GST-compliant invoicing software
- Include GST registration numbers
- Maintain proper records
For Compliance#
- File GST returns on time
- Match with GSTR-2A data
- Claim eligible input tax credit
- Keep transaction records for 6 years
Common Questions#
Which GST rate applies to my product?#
Check the HSN (Harmonized System of Nomenclature) code for goods or SAC (Services Accounting Code) for services. The GST council website has complete rate lists.
Should I charge CGST+SGST or IGST?#
- Same state: CGST + SGST
- Different states: IGST
- Check buyer's GST registration state
Is GST applicable on exports?#
Exports are zero-rated (0% GST) but you can claim input tax credit on inputs used for exports.
Related Tools#
- GST Invoice Generator - Create GST-compliant invoices
- Profit Margin Calculator - Calculate margins including GST