Do NOT Include Insurance As A Cost
Conventional wisdom suggests that car insurance is just as real of a cost of owning a car used for Uber as petrol and tires are. However, as an Uber driver, you should ignore your car insurance costs all together when determining your costs of driving for Uber. Why? For a few reasons.
First of all, it's not a cost that is consumed per mile. It is consumed via time. When you pay for an insurance premium you are paying for a period of time to be insured, say a month, six months, or a year. Whether you drive 1 mile or 100,000 miles during that time doesn't change the cost.
Second of all, you would be paying for it regardless of whether or not you drove for Uber.
If you stopped driving for Uber, you would save just the premium on your car insurance.
Also, if you happen to be a person who has to pay to park your vehicle at home, you should ignore this cost for the same reasons that you ignore insurance costs (except the one where Uber is providing it for you).