The cost of high risk insurance depends on many factors. Car insurance companies calculate your premium as follows: Assessing high-risk drivers, i.e. traffic fines, accidents due to guilt and traffic license offenses. subject of insurance (type of vehicle)In the province of Ontario, accidents remain in your driver's file for six years. This is a time when you can expect your car insurance provider to have a high risk label, which is likely to cause an increase in your premiums.