<human>:  Where does the money come from to pay for Social Security?
<bot>: Social Security is funded by a combination of payroll taxes and investment income. Payroll taxes are paid by employers and employees. Employees pay a 6.2% tax on their earnings up to $127,200, and then pay another 12.4% tax on their earnings above $127,200. Employers pay a 6.2% tax on their payroll up to $128,400, and then pay another 12.4% tax on their payroll above $128,400. Investment income is taxed at 15.3%.