Under federal law (so national law; applies everywhere) your travel time from one work location (client's home) to another during the workday is considered worktime and an hourly employee should be paid for it.The exception is that since the commute to/from work does not need to be paid, to oversimplify somewhat, if you go directly from your home to the first client's home, that would the equivalent of your morning commute and does not need to be paid; similarly, if you drive from a client's home back to your home (or to wherever you go after work; e.g. to a store, to a restaurant, to pick up your child from school, etc.), that would be the equivalent of your return communte and is not paid. But again, travel during the workday from one location to another should be paid.