GST Calculator

A GST calculator is a digital tool designed to compute the GST amount on goods and services either inclusive or exclusive of tax. The Goods and Services Tax (GST) system in India, implemented on July 1, 2017, revolutionized indirect taxation by bringing a uniform structure across the country. However, understanding how GST applies to transactions and managing compliance can be tricky. That’s where the MasterCalculator.in GST Calculator comes in  offering businesses, accountants, and individuals a simplified tool to estimate tax liabilities, net amounts, and input credits.

More Calculators

SIP Calculator

FD Calculator

Lumpsum Calculator

Income Tax Calculator

SWP Calculator

Compound Interest Calculator

EPF Calculator

IRR Calculator

Stock Average Calculator

Loan Calculator

 

ROI Calculator

CAGR Calculator

Commission Calculator

Investment Calculator

Loan EMI Calculator

Indian GST Calculator with Advanced Options

Indian GST Calculator

Advanced Options & Business Type Support

Powered by CBIC Data
Created by: MasterCalculator.in
Last Updated: May 2025

Select Your Business Type

Manufacturing

Production & Assembly

Trading

Buy & Sell Goods

Services

Professional Services

Restaurant

Food & Beverage

Custom

Configure Manually

Custom Configuration:

Configure the calculator based on your specific business requirements. All GST rates and calculation types are available.

GST Calculator

₹

Calculation Results

Net Amount ₹0.00
Total GST ₹0.00
Final Amount ₹0.00

Detailed Tax Breakdown

Original Amount ₹0.00
CGST @ 0% ₹0.00
SGST @ 0% ₹0.00
Total Amount ₹0.00

Calculation Formula:

Formula will appear here

Calculations are based on current GST rates as per CBIC guidelines.

For precise calculations, please verify the applicable HSN code and rate.

HSN Code Lookup

Search for HSN codes by code number or product description to find the applicable GST rate.

Common HSN Codes

HSN Code Description GST Rate
0101 Live horses, asses, mules and hinnies 0%
0202 All goods [other than fresh or chilled] pre-packaged and labelled 5%
1001 Wheat and meslin pre-packaged and labelled 5%
1701 Beet sugar, cane sugar 5%
2710 Petroleum oils and oils obtained from bituminous minerals 18%
3004 Medicaments (excluding goods of heading 3002, 3005 or 3006) 12%
6403 Footwear with outer soles of leather 18%
7108 Gold (including gold plated with platinum) 3%
8517 Telephones for cellular networks 18%
8703 Motor cars and other motor vehicles 28%

Input Tax Credit Calculator

Calculate your eligible Input Tax Credit and determine your net GST liability.

Output Tax (Collected on Sales)

Total Output Tax ₹0.00

Input Tax (Paid on Purchases)

Total Input Tax ₹0.00

Eligibility Factors

%

Adjust if some purchases are for exempt supplies or non-business use.

ITC Calculation Result

Total Output Tax ₹0.00
Eligible Input Tax Credit (ITC) ₹0.00
Net GST Payable ₹0.00

* ITC can be claimed only for business purposes and as per Section 17(5) of the CGST Act.

* Ensure all invoices are valid and suppliers have filed their returns.

ITC Eligibility Guidelines

According to GST law, Input Tax Credit can be claimed only if all conditions below are met:

  • You possess a valid tax invoice or debit note
  • You have received the goods or services
  • The tax charged has been paid to the government by the supplier
  • You have filed your GSTR-3B return
  • You have paid the supplier within 180 days from the invoice date
  • The goods or services are used in the course of business

ITC cannot be claimed on items like:

  • Motor vehicles (with certain exceptions)
  • Food and beverages, outdoor catering
  • Membership of clubs, health and fitness centers
  • Rent-a-cab, health and life insurance (with exceptions)
  • Construction of immovable property (with exceptions)

Composition Scheme Calculator

Calculate tax liability under the Composition Scheme for small businesses with turnover up to ₹1.5 crore.

Quarterly Turnover ₹0.00
Applicable Rate 0%
Composition Tax Payable ₹0.00

* Composition rates: Manufacturers/Traders (1%), Restaurants (5%), Services (6%).

* No Input Tax Credit is available under Composition Scheme.

Remember: Under the Composition Scheme, you cannot collect GST from customers or claim Input Tax Credit. This scheme is recommended only for businesses with minimal B2B transactions and limited input tax.

Business Type Specific Calculator

Select a business type and calculate to see results

Reverse Charge Mechanism

Purchase Value ₹0.00
CGST (0%) ₹0.00
SGST (0%) ₹0.00
Total RCM Tax Payable ₹0.00

* Under RCM, you must pay GST on behalf of the supplier.

* You can claim this tax as Input Tax Credit in your next return, subject to eligibility.

E-commerce GST Calculator (TCS)

Standard TCS Rate: 1%

(0.5% CGST + 0.5% SGST/UTGST) or 1% IGST

Net Value of Taxable Supplies ₹0.00
CGST (0.5%) ₹0.00
SGST (0.5%) ₹0.00
Total TCS Amount ₹0.00

* E-commerce operators must collect TCS at 1% on the net value of taxable supplies.

* TCS must be deposited by the 10th of the following month.

* E-commerce operators should file GSTR-8 for reporting TCS.

Import/Export GST Calculator

Import Calculation

Export Calculation

Import Tax Calculation

Assessable Value: ₹0.00
Customs Duty: ₹0.00
IGST: ₹0.00
Total Import Cost: ₹0.00

Export Refund Calculation

Export Value: ₹0.00
Input Tax Used: ₹0.00
Export Type: -
Refund Eligible: ₹0.00

About This Calculator

This enhanced Indian GST Calculator provides comprehensive tax calculations for various business types and scenarios. It integrates HSN code lookup with rates from the official CBIC database.

Features

  • • Business type specific calculations
  • • Composition scheme calculator
  • • Reverse charge mechanism
  • • E-commerce TCS calculations
  • • Import/Export GST calculator

Disclaimer

This calculator is for educational and informational purposes only. While we strive for accuracy, please consult with a qualified tax professional for specific advice regarding your tax situation.

What is a GST Calculator?

The Goods and Services Tax (GST) system in India, implemented on July 1, 2017, revolutionized indirect taxation by bringing a uniform structure across the country. However, understanding how GST applies to transactions and managing compliance can be tricky.

  1. Total Tax (CGST, SGST, IGST)
  2. Final payable or receivable amount.
  3. Input Tax Credit (ITC).
  4. Net tax liability.
  5. Composition scheme liability.
  6. Sector-wise GST rates.

These calculators save time, minimize errors, and ensure that taxpayers and businesses comply with GST norms accurately.

Key Modules in the GST Calculator System

Based on the images you shared, the GST calculator has five modules, each designed for specific calculations:

A. Standard GST Calculator (Add/Extract GST)

Calculation Mode:

Add GST: Used when you want to calculate tax on top of the base price (exclusive of GST).

Extract GST: Used when you have a tax-inclusive price and want to know the base amount and GST component.

Input Fields:

Amount (₹): The base or final price, depending on the mode.

GST Rate: Choose from standard rates (0%, 5%, 12%, 18%, 28%) with contextual names (e.g., 5% – Essential Items).

Supply Location:

  • Intra-State (CGST+SGST/UTGST)
  • Inter-State (IGST).

HSN Lookup

India’s tax framework GST (Goods and Services Tax) is driven by global standards to ensure uniform classification and identification of goods. At the heart of this lies the HSN Code an essential system for businesses, manufacturers, importers, and exporters.

What is HSN Code?

HSN Code stands for Harmonized System of Nomenclature Code. It is a globally accepted system developed by the World Customs Organization (WCO) to Systematically classify goods.

How to Find the Correct HSN Code?

You can use:

  1. GST portal (https://www.gst.gov.in/)
  2. CBIC HSN lookup tools
  3. Business-specific GST invoices
  4. Commercial websites offering HSN search

Example:

  1. HSN for Mobile phones: 8517
  2. HSN for Shoes: 6403
  3. HSN for Milk powder: 0402

Input Tax Credit (ITC) Calculator

This module helps registered businesses determine their net GST payable after considering input tax paid on purchases.

Features:

Output Tax (Collected on Sales):

  • IGST, CGST, SGST amounts collected.

Input Tax (Paid on  Purchases):

  • IGST, CGST, SGST amounts paid.

Eligibility Factor:

  1. Adjust ITC eligibility percentage (default is 100%)
  2. Useful for partially exempt purchases or non-business usage

Composition Scheme Calculator

Aimed at small businesses with turnover under ₹1.5 crore (or ₹75 lakh/₹50 lakh for certain states), this calculator determines tax payable under the GST composition scheme.

Key Components: 

Type of Business:

  1. Manufacturer/Trader (1%)
  2. Restaurants (5%)
  3. Services (6%)

Quarterly Turnover:

  • Input expected turnover

Calculation Result

  • Applicable Rate (based on business type)
  • Composition Tax Payable

Notes:

Composition dealers cannot collect GST from customers.

ITC is not available.

Business Type Specific Calculator

This is a sector-wise GST calculator, where different industries have different rates and ITC rules.

Components:

1. Business Category:

E.g., textiles & Garments, Food Processing, Electronics, etc.

2. Common GST Rates:

Default to applicable slab for that category (e.g., 5% for textiles)

3. ITC Applicability:

Shows whether Input Tax Credit can be claimed for that category.

4. Transaction Amount:

Enter the transaction value

Reverse Charge Mechanism (RCM)

What is the Reverse Charge Mechanism (RCM)?

Under the standard GST framework, the supplier is responsible for collecting GST from the buyer and depositing it to the government. However, under the Reverse Charge Mechanism (RCM), this responsibility shifts to the recipient (buyer) of goods or services.

⚖️ Definition:

“Reverse Charge means the liability to pay tax is on the recipient of supply of goods or services instead of the supplier.”

RCM is applicable in specified cases under the Central GST Act (Section 9(3) & 9(4)) and equivalent provisions in State GST laws.

Why is RCM Implemented?

  1. To bring unregistered dealers under the tax net
  2. To regulate specific high-risk sectors
  3. To enforce tax collection from import of services
  4. To ensure compliance in cases where the supplier is not liable to pay GST

Treatment of Input Tax Credit (ITC)

GST paid under RCM can be claimed as ITC by the recipient, provided:

  1. The goods/services are used for business purpose.
  2. You’ve paid the RCM liability in cash
  3. Supplier has issued a proper invoic (RCM category)

GST Return Filing for RCM

GSTR-1:

RCM does not appear in GSTR-1 (as this is for outward supplies).

GSTR-3B:

  1. Report RCM tax liability under “3.1(d) – Inward supplies liable to reverse charge.”
  2. Claim ITC under “4(A)(3) -ITC on inward supplies liable to reverse charge.”

E-commerce GST Calculator (TCS)

What is TCS under GST for E‑commerce?

Under Section 52 of the CGST Act, e‑commerce operators (ECOs)—like Amazon, Flipkart—must collect Tax Collected at Source (TCS) at 1% on net taxable value of supplies made through their platforms. This structure ensures tax compliance and traceability in e‑commerce transactions.

Key Points:

1. TCS Rate:

Intra‑state: 0.5% CGST + 0.5% SGST

Inter‑state: 1% IGST

2. Collected by: E‑commerce operator at time of payment to seller

3. Paid via: GSTR‑8 by the 10th of the next month.

Import/Export Calculator

Import Side: Calculating Total Cost

Fields:

  • Assessable Value: Landed cost including customs value
  • Customs Duty (%): Basic customs duty, possibly plus duties like antidumping or safeguard
  • IGST Rate (%): Applicable inter‑state GST rate (0%, 5%, 12%, 18%, 28%).

Calculation Steps:

  1. Customs Duty = Assessable Value × Rate
  2. Add surcharge/duties (e.g. social welfare, anti‑dumping)
  3. IGST = (Assessable Value + Duties) × IGST%
  4. Total Import Cost = Value + All duties + IGST

This reflects total landed cost, with IGST paid upfront (claimable as ITC later).

Export Side: Calculating Refund

Exports are zero-rated under GST. The calculator helps estimate:

  1. Export Value: Amount received in foreign currency
  2. Export Type: Under bond/LUT or with IGST payment
  3. Input Tax Used: IGST paid on input goods or services

Result:

  • Displays export value, input tax used, and whether a refund is eligible under GST Section 54.

Exports under LUT allow IGST refund claims on inputs and exports; ones paid are also refunded .

FAQs on Goods and Services Tax (GST)

1. What is a GST calculator?

A GST calculator is an online or app-based tool that helps compute GST amounts—either adding GST to a base amount or extracting the GST component from an all-inclusive price. It supports computations across CGST, SGST, and IGST based on entered values and rate slabs.

2. How do I calculate GST manually?

Use the basic formula:

  • GST Amount = (Original Amount × GST Rate) ÷ 100
  • Total Amount = Original Amount + GST Amount
    To extract GST from a price already inclusive of tax:
    GST = Total Amount × GST% ÷ (100 + GST%)

3. What are CGST, SGST, and IGST? How are they applied?

  • CGST: Collected by the central government
  • SGST: Collected by the state government
  • IGST: Applied on inter-state supplies; collected centrally and shared with destination state.

4. What are current GST rate slabs in India?

GST is charged in five primary slabs: 0%, 5%, 12%, 18%, and 28%—plus special rates like 3% on gold and cess on luxury/sin goods.

5. What items fall under each GST slab?

  • 0%: Basic food items (e.g., fresh produce)
  • 5%: Essentials (e.g., packaged goods, textiles)
  • 12%–18%: Mid-range goods and services (e.g., electronics, telecom services)
  • 28%: Luxury, sin goods (e.g., cosmetics, vehicles).

6. What is Reverse Charge Mechanism (RCM)?

Under RCM, liability to pay GST shifts from supplier to recipient for specified transactions—such as import of services, legal and GTA services, or purchases from unregistered suppliers. Buyers pay the tax and may claim Input Tax Credit.

7. Can a GST calculator handle RCM transactions?

Yes—many GST calculators include RCM options. Simply select the RCM mode and enter transaction type, amount, and GST rate; the calculator will compute the tax payable under the Reverse Charge framework.

8. What is Input Tax Credit (ITC)?

ITC allows businesses to offset the GST they’ve already paid on purchases against the tax collected from their customers. For example, if output GST is ₹5,000 and input GST is ₹4,000, your net liability would be ₹1,000 .

9. Is GST mandatory for every transaction?

GST applies only to taxable supplies. Items classified as exempt (e.g., milk, fresh fruits) attract 0% GST. Registration is mandatory for those exceeding the turnover threshold (₹20 lakh or ₹10 lakh in special-category states), engaging in inter-state supplies, or online marketplace selling.

10. Do I need to use HSN/SAC codes in a GST calculator?

Yes—accurate tax calculation relies on the correct HSN (for goods) and SAC (for services) codes. These codes classify items under specific GST rates and are mandatory in invoices and returns.