Due Dates
GSTR-1 (Monthly): 11th of every monthGSTR-3B (Monthly): 20th of every monthITR Filing (Individuals): 31st July 2026AOC-4 (ROC Annual Filing): 30th October 2026MGT-7 (ROC Annual Return): 29th November 2026
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GST Calculator Online

Calculate GST amount, CGST, SGST, and IGST instantly. Add or remove GST from any amount with our free calculator.

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GST Breakdown

Taxable Amount₹10,000.00
GST Amount (18%)₹1,800.00
CGST (9%)₹900.00
SGST (9%)₹900.00
Total Amount₹11,800.00
Formula: GST = Amount × 18% = ₹1,800.00

What is GST?

The Goods and Services Tax (GST) is an indirect tax levied on the supply of goods and services in India. Introduced on 1st July 2017, GST replaced multiple cascading taxes levied by the central and state governments, creating a unified national market.

GST is a destination-based consumption tax applied at every stage of the supply chain, with credit available for tax paid at previous stages. This eliminates the cascading effect of tax-on-tax and makes the system more transparent and efficient.

Types of GST

CGST

Central GST

Collected by the Central Government on intra-state supplies. Rate is half of the total GST rate.

SGST

State GST

Collected by the State Government on intra-state supplies. Rate equals the CGST rate.

IGST

Integrated GST

Collected by the Central Government on inter-state supplies. Rate equals CGST + SGST combined.

UTGST

Union Territory GST

Applied instead of SGST for Union Territories without legislature. Same rate as SGST.

GST Rate Slabs

GST RateCategoryExamples
0% (Exempt)Essential ItemsFresh fruits, vegetables, milk, eggs, bread, salt, natural honey
0.25%Precious StonesRough diamonds, semi-precious stones
3%Gold & SilverGold, silver, platinum, gold jewellery
5%Common Use ItemsPackaged food, fertilizers, footwear under ₹1000, transport services
12%Standard GoodsFrozen meat, butter, processed food, mobile phones, sewing machines
18%Most ServicesIT services, restaurants with AC, financial services, telecom, branded garments
28%Luxury/DemeritCars, cement, ACs, pan masala, aerated drinks, dishwashers

Frequently Asked Questions

How do I add GST to an amount?
To add GST, multiply the original amount by the GST rate and add it. For example, for 18% GST on ₹10,000: GST = 10,000 × 18% = ₹1,800. Total = ₹11,800.
How do I remove GST from an amount?
To remove GST, divide the inclusive amount by (1 + GST rate). For 18% GST from ₹11,800: Original = 11,800 ÷ 1.18 = ₹10,000.
What is the difference between CGST and SGST?
Both are equal halves of the total GST on intra-state transactions. CGST goes to the Central Government and SGST goes to the State Government. For 18% GST: 9% CGST + 9% SGST.
When is IGST applicable instead of CGST+SGST?
IGST applies on inter-state supplies (when buyer and seller are in different states) and on imports. The full GST rate is charged as IGST which is later settled between states.
Who needs to register for GST?
Businesses with annual turnover exceeding ₹40 lakh (₹20 lakh for special category states) must register. E-commerce operators, inter-state suppliers, and casual taxable persons must register regardless of turnover.
What is Input Tax Credit (ITC)?
ITC allows businesses to claim credit for GST paid on purchases against their GST liability on sales. This prevents tax cascading and ensures GST is effectively levied only on value addition at each stage.
How often do I need to file GST returns?
Regular taxpayers file GSTR-3B monthly (or quarterly under QRMP scheme) and GSTR-1 for outward supplies. Annual return GSTR-9 is due by 31st December of the next financial year.
Is GST applicable on exports?
Exports are treated as zero-rated supplies under GST. Exporters can either export without payment of IGST under bond/LUT or claim refund of IGST paid on exports.

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