The money for SSI checks comes from the general revenues of the United States Treasury. Social Security benefits are paid from contributions of workers, employers, and self-employed people. Social Security funds are not used for SSI checks. People who get Social Security checks may get SSI checks too, if they are eligible for both. However, a person does not have to be eligible for Social Security to get SSI. People getting federal SSI checks or state supplemental checks may also be eligible for social services provided by a state. These services help people meet problems in daily living or special problems related to age or a handicapping condition.