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What is GST and How to Calculate It — Free GST Calculator

PDF24x Team24 July 20262 min read

What is GST?

GST (Goods and Services Tax) is a unified indirect tax levied on the supply of goods and services across India. It replaced a complex system of multiple taxes including VAT, service tax, excise duty, and octroi. GST was introduced on 1st July 2017 and is governed by the GST Council.

Types of GST in India

CGST — Central GST

Collected by the Central Government on intra-state sales (within the same state).

SGST — State GST

Collected by the State Government on intra-state sales. Both CGST and SGST are charged at equal rates.

IGST — Integrated GST

Charged on inter-state sales (between two different states). Collected by the Central Government.

GST Slabs in India

| GST Rate | Examples | |----------|---------| | 0% | Essential food items, books, newspapers | | 5% | Packaged food, medicines, transport | | 12% | Computers, processed food, business class air tickets | | 18% | Most services, electronics, restaurants | | 28% | Luxury goods, automobiles, tobacco |

How to Calculate GST

Adding GST to a price:

GST Amount = Original Price x GST Rate / 100

Example: Rs 1,000 product with 18% GST

  • GST = Rs 180
  • Total = Rs 1,180

Removing GST from an inclusive price:

Original Price = Inclusive Price x 100 / (100 + GST Rate)

Example: Rs 1,180 inclusive of 18% GST

  • Original = Rs 1,000
  • GST = Rs 180

CGST and SGST Split

For intra-state transactions, GST is split equally:

  • 18% GST = 9% CGST + 9% SGST
  • 12% GST = 6% CGST + 6% SGST
  • 5% GST = 2.5% CGST + 2.5% SGST

Use Our Free GST Calculator

Instead of calculating manually, use our free GST Calculator. It supports all GST slabs, shows CGST and SGST split, and works for both adding and removing GST.

GST Registration Threshold

Businesses with annual turnover above Rs 40 lakhs must register for GST. Once registered, they must file monthly or quarterly returns.

Input Tax Credit

One of the biggest benefits of GST is Input Tax Credit. Businesses can claim credit for GST paid on purchases and offset it against GST collected on sales. This eliminates the cascading effect of taxes.

Conclusion

GST simplified India's indirect tax structure significantly. Whether you are a business owner, freelancer, or consumer, understanding GST helps you make better financial decisions. Use our free GST Calculator to quickly calculate GST for any amount and slab rate.