When Goods and Services Tax is implemented, there will be 3 kinds of applicable Goods and Services Taxes:
CGST: where the revenue will be collected by the central government
SGST: where the revenue will be collected by the state governments for intra-state sales
IGST: where the revenue will be collected by the central government for inter-state sales
A dealer in Maharashtra sold goods to a consumer in Maharashtra worth Rs. 10,000. The Goods and Services Tax rate is 18% comprising CGST rate of 9% and SGST rate of 9%. In such cases the dealer collects Rs. 1800 and of this amount, Rs. 900 will go to the central government and Rs. 900 will go to the Maharashtra government.
Now, let us assume the dealer in Maharashtra had sold goods to a dealer in Gujarat worth Rs. 10,000. The GST rate is 18% comprising of CGST rate of 9% and SGST rate of 9%. In such case the dealer has to charge Rs. 1800 as IGST. This IGST will go to the Centre. There will no longer be any need to pay CGST and SGST.