<prompt> Human: Hey PF! My auto insurance carrier sent me a letter asking if I drive my car for work more than 50 of the time and also asking about my annual mileage. I do drive my car for work a fair bit, but Im not a delivery driver or anything, but it is debatable if it is 50 of the time. I tried Googling for answers but came up short. I dont want to end up with a higher premium because I was being overly honest.  <response>: When calculating mileage, be sure to differentiate between commuting to and from work vs. performing work functions e.g., travel to customer sites or delivering a product or service.If you are performing work functions, are you reimbursed? If yes, the amount of the reimbursement is intended to cover operating costs - including depreciation, gas and insurance. If you arent being reimbursed, look at what your options are from a tax filing perspective as there is an IRS mileage allowance that might apply.1 on the other comments about reporting honestly to the insurance company - you definitely dont want to be in a position of denied coverage. 