GST Calculator – Add/Remove Tax with CGST/SGST Split

Calculate GST inclusive and exclusive amounts instantly. Support for multiple tax slabs (0%, 5%, 12%, 18%, 28%) with automatic CGST/SGST breakdown and visual price analysis.

Accurate Tax Logic
Instant Updates
Visual Breakdown
Final Amount
₹0

Price Breakdown

Visual representation of base amount, CGST, SGST, and total amount with tax.

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Calculate GST

Add or remove GST from your amount. Choose from standard tax slabs and view instant CGST/SGST split with detailed breakdown.

₹10K
Enter the base amount. Mode determines if GST will be added to or removed from this amount.
Common GST slabs in India: 0% (essential goods), 5% (necessities), 12% (standard), 18% (most goods), 28% (luxury items). Use custom for other rates.
GST Amount
₹0
Final Amount
₹0
Detailed Tax Breakdown
Component Rate Amount
Base Amount — ₹0
CGST 0% ₹0
SGST 0% ₹0
Total GST 0% ₹0
Final Amount — ₹0
Note: CGST (Central GST) and SGST (State GST) are each half of the total GST rate. For inter-state transactions, IGST (Integrated GST) applies at the full rate instead.
Final Amount (Including GST)
₹0
Base Amount ₹0
GST Rate 0%
CGST (0%) ₹0
SGST (0%) ₹0
Total GST Amount ₹0

Smart Tips

Always verify the applicable GST rate for your product/service category as rates vary by classification.
For intra-state transactions, use CGST + SGST split. For inter-state, IGST applies at the full rate.
When removing GST from MRP, ensure you're working with the correct inclusive amount to get accurate base price.
Keep GST invoices organized for proper input tax credit claims and compliance reporting.
Use this calculator for quick estimates during quotations, billing, and financial planning.

Price Breakdown

Visual breakdown of base amount, CGST, SGST, and total with tax.

How to Use GST Calculator?

1

Select Mode

Choose "Add GST" to calculate inclusive amount or "Remove GST" to extract base price from MRP.

2

Enter Amount

Input your base amount (for Add mode) or final amount including tax (for Remove mode).

3

Choose GST Rate

Select from common slabs (0%, 5%, 12%, 18%, 28%) or enter a custom rate as needed.

4

View Breakdown

Instantly see final amount, CGST/SGST split, and complete tax breakdown with visual chart.

Understanding GST Calculation

What is GST?

Goods and Services Tax (GST) is a comprehensive indirect tax levied on the supply of goods and services in India and several other countries. It replaced multiple cascading taxes with a unified tax structure, simplifying compliance and reducing tax burden through input tax credits.

How is GST Calculated?

Adding GST: When you want to add GST to a base price (exclusive amount), the calculation is straightforward:
Final Amount = Base Amount + (Base Amount × GST Rate / 100)
Or simplified: Final Amount = Base Amount × (1 + GST Rate / 100)

Removing GST: When you have the final price (inclusive amount) and need to extract the base price:
Base Amount = Final Amount / (1 + GST Rate / 100)
GST Amount = Final Amount - Base Amount

CGST & SGST Split

For intra-state transactions (within the same state), GST is split equally into:
• CGST (Central GST) = GST Rate / 2 (goes to Central Government)
• SGST (State GST) = GST Rate / 2 (goes to State Government)

For inter-state transactions, IGST (Integrated GST) applies at the full rate and goes to the Central Government, which then distributes to the destination state.

Standard GST Rates in India

Factors Affecting GST Calculation

Uses & Benefits

E-commerce & Retail Pricing

Quickly calculate final selling prices including GST for product listings, quotes, and invoices.

Invoice Generation

Generate accurate GST breakdowns for professional invoices with proper CGST/SGST or IGST components.

Reverse Calculation

Extract base price from MRP or tax-inclusive amounts for cost analysis and margin calculations.

Financial Planning

Accurately budget for purchases and sales by understanding the tax component in transactions.

Compliance & Reporting

Ensure proper tax computation for GST returns, input tax credit claims, and audit readiness.

Quick Customer Quotes

Provide instant pricing to customers with transparent GST breakdown during sales discussions.

Who Uses This Tool?

Frequently Asked Questions

What's the difference between "Add GST" and "Remove GST" modes?
Add GST: Use when you have a base price (before tax) and want to calculate the final price including GST. Example: Your product costs ₹1000, add 18% GST = ₹1180 final price.

Remove GST: Use when you have the final price (including tax) and want to extract the base price. Example: MRP is ₹1180 with 18% GST, base price = ₹1000.
When should I use CGST+SGST vs IGST?
CGST + SGST: For intra-state transactions (buyer and seller in the same state). The GST is split equally between Central and State governments.

IGST: For inter-state transactions (buyer and seller in different states) or imports. The full GST goes to the Central Government initially, which then distributes to the destination state.

This calculator shows the CGST+SGST split as it's the most common scenario. For IGST, the total GST amount remains the same—just the collection mechanism differs.
How do I know which GST rate applies to my product/service?
GST rates are determined by HSN (Harmonized System of Nomenclature) codes for goods and SAC (Services Accounting Code) for services. Check the official GST portal or consult your tax advisor for the correct classification. This calculator supports all standard rates (0%, 5%, 12%, 18%, 28%) plus custom rates for special cases.
Can I claim Input Tax Credit (ITC) on GST paid?
Registered GST businesses can claim Input Tax Credit for GST paid on business purchases against their output GST liability on sales. This calculator helps you compute the GST amounts—consult your accountant for ITC eligibility and claim procedures based on your specific transactions and compliance status.
Why is the calculator showing CGST and SGST as half the GST rate each?
In India's GST structure for intra-state transactions, the total GST is equally divided between the Central Government (CGST) and the State Government (SGST). So if the total GST rate is 18%, CGST is 9% and SGST is 9%. This dual structure ensures both governments receive tax revenue from the same transaction.
Does this calculator work for countries other than India?
The calculation logic (adding/removing percentage-based tax) is universal and works for any country's VAT, GST, or sales tax. However, the CGST/SGST terminology and rate structure are specific to India. For other countries, treat the total GST rate as the applicable VAT/sales tax rate, and ignore the CGST/SGST split if it doesn't apply to your jurisdiction.

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Trust & Notes

Privacy First

All calculations happen locally in your browser. No data is stored or transmitted.

Accurate Formula

Uses standard GST calculation methods with proper CGST/SGST split logic.

Input Validated

Smart validation prevents errors and ensures calculation accuracy.

Always Available

Works offline once loaded. Calculate GST anytime, anywhere.

Disclaimer: This GST calculator is an estimation tool for educational and planning purposes. Actual GST liability may vary based on specific product/service classification (HSN/SAC codes), applicable exemptions, composition scheme eligibility, reverse charge mechanisms, and evolving tax regulations. GST rates and rules are subject to change by government authorities. For official compliance, invoice generation, and tax filing, please consult the official GST portal or a qualified tax professional. This tool does not constitute tax, legal, or financial advice.