I think Lottery winnings are generally subject to federal and state income taxes.the actual tax rate applicable to lottery winnings would depend on various factors such as the amount of winnings, the state where the winnings were obtained, and the individual's tax bracket.When someone wins a lottery, the lottery administration may withhold a certain percentage of the winnings to cover the taxes. Although the lottery winnings may not be subject to payroll taxes or Social Security and Medicare taxes, they are still considered taxable income for the purpose of federal income tax.