The Additional Medicare Tax refers to the “additional” Medicare tax that individuals are required to pay after their received wages exceed a certain income threshold in any given year. The rate for this is 0.9%. Generally, individuals who have received over $200,000 are required to start paying the Additional Medicare Tax, but this can vary depending on a person’s filing status. For example: Married filing jointly: $250,000 Married filing separately: $125,000 Single: $200,000 Head of household: $200,000 Qualifying widow(er) with dependent child: $200,000 See our guide on calculating payroll taxes for more information.