Personal Income Tax is a tax imposed by the government on an individual's earnings. This includes wages, salaries, and other forms of income such as dividends and interest. The amount of tax owed typically depends on the individual's income level, with higher earners often paying a larger percentage. Governments use the revenue from personal income tax to fund public services like education, healthcare, and infrastructure. Tax rates and regulations can vary significantly between different regions and countries, making it important for individuals to understand their local tax laws and obligations.