GST Calculator

Calculate Goods and Services Tax (GST) online for inclusive and exclusive prices with 50:50 CGST & SGST breakdown.


Please enter an amount of at least ₹ 1.
Enter original price before tax (GST will be added).
Exclusive (Default): Adds GST on base cost. Inclusive: Extracts hidden GST from MRP.
Custom rate must be between 0% and 100%.
Pre-Tax Net Price (Base Cost)

₹ 0

Original price before GST
Total GST Tax Payable

₹ 0

CGST: ₹ 0 SGST: ₹ 0
Gross Total (Final Invoice Amount)

₹ 0

Final payable / billing amount

Itemized Tax Invoice Summary

50:50 Intra-State Standard Split
Item Particulars Applicable Rate Amount (₹)
Base Price (Net Amount) - ₹ 0
Central GST (CGST) 9% ₹ 0
State GST (SGST / UTGST) 9% ₹ 0
Total GST Tax Payable 18% ₹ 0
Final Invoice Total (Gross Amount) - ₹ 0

How to use our free Online GST Calculator?


Our free gst calculator (also known as the goods and services tax calculator) allows consumers, chartered accountants, freelance professionals, and businesses to compute GST liabilities in seconds:

  • Enter Amount: Input your pre-tax base cost or your total MRP invoice value.
  • Choose Calculation Mode: Select GST Exclusive to add tax onto a base price, or GST Inclusive to extract the hidden base price and tax from an all-inclusive retail figure.
  • Select GST Slab: Choose from standard government slabs (0%, 3%, 5%, 12%, 18%, 28%) using the dropdown or quick-select pills, or type a custom percentage.
  • Select Transaction Type: Choose Intra-State for sales within the same state (CGST + SGST) or Inter-State for transactions across state borders (IGST).
  • Instant Results: View your exact Net Base Cost, CGST / SGST / IGST Tax Components, and Total Final Amount with zero manual calculation errors.

What is Goods and Services Tax (GST) & How Does it Work?


Goods and Services Tax (GST) is a unified, destination-based, comprehensive indirect tax levied on the manufacturing, sale, and consumption of goods and services across India. Enacted on July 1, 2017, GST replaced a multi-tiered labyrinth of legacy indirect taxes, including Central Excise Duty, Service Tax, State VAT, Purchase Tax, Luxury Tax, and Entry Tax.

Understanding the 4 GST Components: CGST, SGST, UTGST, and IGST

GST is categorized into four primary types based on the geographical movement of goods and services:

1. CGST (Central Goods and Services Tax)

Levied by the Central Government on intra-state supplies of goods and services (sales within the same state or union territory).

2. SGST (State Goods and Services Tax)

Levied by the respective State Government on intra-state supplies. It is collected alongside CGST in equal proportions.

3. UTGST (Union Territory Goods and Services Tax)

Levied in place of SGST by Union Territories without a state legislature (e.g., Andaman & Nicobar, Lakshadweep, Ladakh).

4. IGST (Integrated Goods and Services Tax)

Levied on all inter-state supplies (sales between two different states or international imports/exports) by the Central Government.

GST Calculation Formulas: Exclusive vs Inclusive (Forward & Reverse)


1. GST Exclusive Formula (Adding GST to Base Price)

When a seller quotes a pre-tax base price, the GST is added on top of the base cost:

GST Amount = ( Base Cost × GST Rate ) ÷ 100
Total Gross Amount = Base Cost + GST Amount

2. GST Inclusive Formula (Extracting Base Cost from MRP)

When an item is sold at a maximum retail price (MRP) that already includes tax, the reverse GST formula extracts the true pre-tax cost:

GST Amount = Total Amount × [ GST Rate ÷ ( 100 + GST Rate ) ]
Base Net Cost = Total Amount − GST Amount

GST Calculation Worked Examples: Step-by-Step Walkthrough


Example 1: Adding 18% GST (Exclusive)

  • Pre-Tax Base Amount: ₹10,000
  • GST Rate: 18% (Intra-State)
  • GST Amount: ₹10,000 × (18 ÷ 100) = ₹1,800
  • CGST (9%): ₹900
  • SGST (9%): ₹900
  • Total Final Bill: ₹11,800

Example 2: Extracting 18% GST from MRP (Inclusive)

  • Total MRP Price: ₹11,800
  • GST Rate: 18%
  • GST Amount: ₹11,800 × [18 ÷ (100 + 18)] = ₹1,800
  • Original Base Cost: ₹11,800 − ₹1,800 = ₹10,000
  • Tax Portion: Exactly 15.25% of the gross inclusive price.

Official GST Rate Slabs in India (Item Classification)


Goods and services in India are categorized under specific Harmonized System of Nomenclature (HSN) and Services Accounting Code (SAC) rates:

GST Slab Typical Goods Covered Typical Services Covered
0% (Nil) Unpacked food grains, fresh fruits, vegetables, milk, eggs, salt, curd, unbranded paneer, printed books, handlooms. Basic healthcare, primary education, residential house renting for dwelling, public postal services.
3% Gold, silver, platinum, diamonds, precious stones, imitation jewelry. Job work on gold and precious metal manufacturing.
5% Packaged food items, tea, coffee, sugar, edible oils, spices, life-saving medicines, cashew nuts, coal, footwear under ₹1,000. Economy class air travel, railways passenger transport, small restaurants (non-AC / AC), cab aggregators.
12% Processed food products, butter, cheese, ghee, frozen meat, notebooks, exercise books, medical diagnostic kits, apparel above ₹1,000. Business class air travel, hotel room tariffs between ₹1,000 and ₹7,500/night, state-run lotteries.
18% Most manufactured goods, IT hardware, computer monitors, soaps, toothpaste, hair oil, capital machinery, consumer electronics. IT software services, telecommunications, banking & financial services, professional consulting, restaurant dining in 5-star hotels.
28% Luxury motorcars, high-end motorcycles, aerated beverages, tobacco, cigarettes, pan masala, gambling, race clubs, online gaming. Cinema tickets exceeding ₹100, 5-star luxury hotel suites, online gaming and casino services.

GST Amount Reference Table (Exclusive - Added to Base Cost)


Quickly check the total GST and gross invoice total across common transaction amounts:

Base Amount (₹) GST @ 3% (₹) GST @ 5% (₹) GST @ 12% (₹) GST @ 18% (₹) GST @ 28% (₹)
₹1,000 ₹30 (Total: ₹1,030) ₹50 (Total: ₹1,050) ₹120 (Total: ₹1,120) ₹180 (Total: ₹1,180) ₹280 (Total: ₹1,280)
₹5,000 ₹150 (Total: ₹5,150) ₹250 (Total: ₹5,250) ₹600 (Total: ₹5,600) ₹900 (Total: ₹5,900) ₹1,400 (Total: ₹6,400)
₹10,000 ₹300 (Total: ₹10,300) ₹500 (Total: ₹10,500) ₹1,200 (Total: ₹11,200) ₹1,800 (Total: ₹11,800) ₹2,800 (Total: ₹12,800)
₹25,000 ₹750 (Total: ₹25,750) ₹1,250 (Total: ₹26,250) ₹3,000 (Total: ₹28,000) ₹4,500 (Total: ₹29,500) ₹7,000 (Total: ₹32,000)
₹50,000 ₹1,500 (Total: ₹51,500) ₹2,500 (Total: ₹52,500) ₹6,000 (Total: ₹56,000) ₹9,000 (Total: ₹59,000) ₹14,000 (Total: ₹64,000)
₹1,00,000 ₹3,000 (Total: ₹1,03,000) ₹5,000 (Total: ₹1,05,000) ₹12,000 (Total: ₹1,12,000) ₹18,000 (Total: ₹1,18,000) ₹28,000 (Total: ₹1,28,000)

How Input Tax Credit (ITC) Eliminates Cascading Taxes


One of the most revolutionary aspects of the GST architecture is Input Tax Credit (ITC). ITC prevents double taxation across manufacturing and distribution channels.

Practical Example of Input Tax Credit:

  • Raw Material Purchase: A manufacturer buys raw materials worth ₹1,00,000 and pays 18% GST (₹18,000 Input Tax).
  • Value Addition & Sale: After manufacturing, the finished product is sold for ₹1,50,000 with 18% GST charged to the wholesaler (₹27,000 Output Tax).
  • Net Tax Payable to Government: Instead of paying the full ₹27,000, the manufacturer sets off the ₹18,000 already paid:
    Net Tax Payable = Output Tax (₹27,000) − Input Tax Credit (₹18,000) = ₹9,000

Frequently Asked Questions


How is GST calculated on an exclusive amount (adding GST)?

To calculate GST on a base price (exclusive amount), multiply the base amount by the applicable GST rate divided by 100: GST Amount = Base Amount × (GST Rate ÷ 100). The final invoice price equals Base Amount + GST Amount.

How do you extract base price and GST from an inclusive amount (MRP)?

To extract the GST amount from a GST-inclusive total (such as an MRP price tag), use the reverse GST formula: GST Amount = Total Amount × [GST Rate ÷ (100 + GST Rate)]. The original base price equals Total Amount minus GST Amount.

What is the difference between CGST, SGST, and IGST?

CGST (Central GST) and SGST (State GST) apply to intra-state transactions (sales within the same state), where the total GST rate is divided equally between the Central and State Governments (e.g., an 18% rate is split into 9% CGST and 9% SGST). IGST (Integrated GST) applies to inter-state transactions (sales between two different states or import/export), where the entire 18% is levied as IGST by the Central Government and later apportioned to the consuming state.

What are the standard GST rate slabs in India?

India currently operates under four primary GST slabs: 5% (essential daily items and transport), 12% (processed foods and standard goods), 18% (most commercial goods, IT services, and capital items), and 28% (luxury items and sin goods). In addition, 0% applies to unpacked basic foods, and a special 3% rate applies to gold, silver, and precious jewelry.

What is Input Tax Credit (ITC) in GST?

Input Tax Credit (ITC) allows registered businesses to reduce the GST they have already paid on purchases (inputs) from the GST they collect on sales (output tax liability). This prevents cascading of taxes ('tax on tax') across the supply chain.

Who is required to register for GST in India?

Businesses with an aggregate annual turnover exceeding ₹40 Lakhs for the supply of goods (₹20 Lakhs for special category states) or ₹20 Lakhs for the supply of services (₹10 Lakhs for special category states) are legally required to register for GST. Inter-state suppliers and e-commerce sellers must register regardless of turnover.

Is GST applicable on discounts given on an invoice?

Trade discounts or cash discounts shown clearly on the face of the tax invoice before or at the time of supply are deducted from the gross value, and GST is charged only on the net discounted price.

Can individual consumers claim Input Tax Credit on GST paid?

No, retail end-consumers cannot claim Input Tax Credit. ITC is only available to GST-registered businesses and professionals who use the purchased goods or services for business furtherance.