The GST Council has proposed raising GST from 12% to 18% based on the margin value of used cars. This change will affect petrol cars with a certified engine capacity of 1200cc and above for cars, diesel cars with an accredited engine capacity of 1500cc and above, as well as all EVs. However, the rule does not apply to vehicles sold by persons who have not registered with the agency.
https://www.jaagrukbharat.com/gst-hike-on-used-cars-what-it-means-for-buyers-and-businesses-3900645