Op here. I am in the DC area (Alexandria) and I have 5 years of experience and work for multiple families. Ok, so I will start asking. I have been working for this specific family for about 2 years, and driving the kid for about 1 year, and they never reimbursed me or talked about it. It didn't occur to me they had to until another family started asking me to drive their kids and asked me for how I wanted my mileage reimbursement. I will ask now, especially now durin summer that the parents are always asking to pick up from camp 5 minutes away from home. And go to the pool 20 minutes away. Thank you.