I get mileage reimbursement from my employer to travel to, from, and between clients' homes anything over 20 miles one way. When I received my w2, I saw that the money I was paid for mileage reimbursement was included in box 1, wages. When I asked my employer about it, she told me the reason it was included in box 1 is because it is taxable. Yet my husband also travels a lot for his job and gets mileage reimbursement, but his employer did not include it in his box 1 wages. The only difference I can see between the two is that my husband uses his car to do his work (he delivers meals for Meals on Wheels), and I get reimbursed for miles from my home to my clients' homes and back. Incidentally, I don't get paid for my time to travel but my husband does. Don't know if this makes any difference.