Hi Ramanan, as per GST norms, perquisites that are under CTC will not attract any tax as they fall under the Employee-Employer relation. However, perquisites above CTC will attract GST.
Since you mentioned perks like petrol allowance, driver allowance, telephone/internet allowance, attire allowance, etc., all of these are already fully taxable. It seems you are currently following the wrong taxable structure.
Please contact a good tax consultant and make the necessary changes to the structure immediately. The link below will help you identify the tax-saving components:
http://www.incometaxindia.gov.in/pag...c-content.aspx
Thank you.