Correct. I was in that boat. For a 200 amp upgrade I would also have needed a service upgrade from the utility - Hydro One penny-pinchers apparently install as cheap an aluminum service cable as they can (new home in 2013). My cost was quickly spiralling into the thousands (plus weeks to wait for Hydro One to come and even assess the situation).
What saved me from the megabucks on a 100 amp service was a charge controller that automatically disables car charging if the load would be too high. Code-compliant and means the charger doesn't have to be part of the load calculation. It's tripped twice in a year and a half - summer nights with A/C and clothes dryer running. It un-trips after the load goes back down and the car resumes charging. The one I have is this -
DCC-9.