GST Calculator - Free Online GST Calculator for India

GST (Goods and Services Tax) is a comprehensive indirect tax levied on the supply of goods and services across India. It replaced multiple indirect taxes like VAT, service tax, and excise duty.

GST is calculated as a percentage of the taxable value of goods or services. The formula is: GST Amount = (Original Cost x GST%)/100. Net Price = Original Cost + GST Amount.

CGST (Central GST) and SGST (State GST) are levied on intra-state supplies. IGST (Integrated GST) is levied on inter-state supplies and imports. Both halves are equal to the total GST rate divided by 2.

For adding GST: GST Amount = Taxable Value x (GST Rate/100). Net Price = Taxable Value + GST Amount. For removing GST: Taxable Value = Net Price x [100/(100+GST Rate)].

Since 22 September 2025 most goods and services are taxed at 5% or 18%, with a special 40% rate for a few luxury and sin goods; some tobacco items continue at earlier rates. Check the notified rate for your HSN/SAC.

GST Compensation Cess is an additional tax on certain goods to compensate states for revenue loss due to GST implementation. It is levied on items like automobiles, tobacco products, and aerated drinks.

Reverse GST calculates the original taxable value from the total GST-inclusive amount. Formula: Taxable Value = Gross Amount x [100/(100+GSTRate)]. This is useful for businesses maintaining accounts with GST-inclusive amounts.

HSN (Harmonized System of Nomenclature) code is an internationally accepted product classification system. It is used in GST invoices to classify goods and determine the applicable GST rate.

Yes, our GST calculator uses the standard GST formulas and rates. However, for official tax calculations, always verify with your CA or refer to the latest GST rate notifications from CBIC.

Most services are taxed at 18%; some at 5% or exempt. Check the notified rate for your SAC.

GST returns are filed monthly (GSTR-1, GSTR-3B) or quarterly (under QRMP scheme). The GSTR-3B return contains the GST liability summary and must be filed by the 20th of the following month.

ITC allows businesses to set off GST paid on purchases against GST collected on sales. This prevents cascading of taxes. ITC can be claimed only on business-related purchases with valid tax invoices.

Businesses use GST calculators to compute GST on invoices, and reverse GST for purchase reconciliation.

GST is a unified tax replacing VAT (Value Added Tax), service tax, and excise duty. VAT was state-level tax on goods, while GST is a comprehensive tax on both goods and services at both state and central levels.

Rates are notified by HSN/SAC on the CBIC website. The main rates since 22 September 2025 are 5% and 18%, with a special 40% rate.