In the present time there was many changes in Indirect tax reform in India established on the nation of “ One Nation, One Market, One Tax “ is finally here. To make India as a financial super power, after the GST. Only a registered dealer can collect GST on the taxable value of goods and services made by him and take Input tax credit. After GST product selling price changed and supplier collected input tax by customers. GST is changing in the whole current indirect tax system. GST is likely to merge the entire multiple and complex taxes under one roof and will make a business very easily. However, petroleum products were kept out of GST framework in order to preserve the revenue acquired by the state. This study gives an overview of applied GST on Petrol and Diesel price before and after.