Yes, GST Registration Is Free
Unlike a trademark or IEC, GST registration has no government fee. You can apply yourself on gst.gov.in with a PAN, Aadhaar, mobile, email, address proof and bank details, and pay nothing. Sites that charge for “GST registration” are charging for their own help.
Doing it yourself is easiest when your documents are complete. The free checklist above lists them for your business type and state, with notes such as the rent agreement and owner’s NOC for a rented place.