Identify the applicable GST rate for the goods or services
Determine the taxable value before tax
Multiply the taxable value by the GST rate
Add CGST and SGST for intra-state supplies
Add IGST for inter-state supplies
Subtract eligible input tax credit from the output GST
Use the formula: GST = Taxable Value × GST Rate
Use the formula: Final Price = Taxable Value + GST