A professional tax is a state tax on individuals earning salaries or wages, as well as on people practicing professions such as doctors, lawyers, and accountants. An indirect tax, such as a professional tax, is imposed by state governments and is compulsory for individuals who fall into taxable salary or income categories prescribed by each individual state. The tax is deducted from the salary of an employee by the employer and is later paid into the state government account within the stipulated time frame. This deduction is basically the way by which the amount of professional tax paid can reduce the taxable income, which then lowers the overall tax liability of the individual.