Taxation involves the process by which governments raise revenue through legal means to fund government expenses and promote citizen welfare, and includes the collection of a share of individual and organizational incomes. Taxes are compulsory contributions imposed by law that are generally paid in cash based on an individual's ability to pay, with higher incomes resulting in higher tax amounts. Taxes can be levied on people, property, acts, rights, or privileges within a government's jurisdiction as determined by law for public purposes.