<prompt> Human: My work requires my colleagues and I to travel to project sites throughout our geographic area. Usually, the job sites are within a 3 hour drive of the company HQ.When required to go to a site for the day, we are allowed to expense our mileage all of us use our personal cars. Ill often leave straight from my house, as its generally closer to the project area than the company office. When reporting my mileage, I basically write down my cars miles when I leave my house, then record it upon return. The difference between these figures is what I expect to be reimbursed for.Our office admin person claims that I am supposed to deduct the mileage I typically drive to and from work everyday from the expense mileage if I leave directly from my house. Their reasoning is that I am typically required to drive at least to the office each day 40 miles round-trip so I should deduct that amount from my mileage totals. I wholeheartedly disagreed. If I am required to use my car to perform company business and I cant claim the mileage driven on my taxes not 1099, then my expectation is to be reimbursed for that mileage. On top of that, if I drove to the office first and then to the job site, I could technically claim additional mileage that I am saving them by leaving from my own house since the office is further away.Am I crazy? How do other companies treat this situation?  <response>: Our office admin person claims that I am supposed to deduct the mileage I typically drive to and from work everyday from the expense mileage if I leave directly from my house.This is how it works. The business cannot call it an expense otherwise and the IRS will come after them. Im sure it sounds weird, but its the standard way of doing this. 