Collision coverage usually covers all cost of repairing the damage on your own car after an accident which you will be responsible. Yes, you are right. If you choose to ask ICBC to pay your repair cost, your next year's premium will go up for sure. It's hard to decide whether buy or not buy above coverage.
If your car is leasing car, you have to have collision coverage. If you car is relatively new and you don't want pay a lot one time after an accident, you may need collision coverage. If you think you car is old and not worth it, you may ignore that coverage. It's really case by case and person by person.
If you want to get more detail information, please feel free to contact me @ 604-618-6190 or email me: phil_wang2004@hotmail.com My name is Philip. I'm the General Insurance Agent. Thank you.
(Sorry can not type Chinese at office)