a uniform tax or surcharge imposed upon every person or every adult in a specific group, as on those entering or leaving a country or using a particular service or conveyance.
Examples from the web for head tax
The conflict was even more egregious a few years ago when, as budget minister, he was also the state's head tax collector.
Would you keep the city's head tax intact, end it.
By the end of my term, the employee head tax will be gone.