Social Security is an authorized supplemental income which is funded from payroll taxes. A certain percentage is withheld from a worker's payroll check and deposited into a Social Security fund. The fund helps benefit Social Security recipients, such as retired and disabled Americans.

SSI (Social Security Income) is a federal supplemental program that helps people over the age of 65 or the disabled of any age. Recipients must meet certain qualifications.

In order to qualify for SSI, one must be age 65 or older or disabled. They also must meet certain low income guidelines. A total of cash on hand, other wages, owned real estate, household income must not exceed a certain amount to qualify for SSI.

To apply for SSI, one must contact and set up and appointment with the Social Security Administration. You will need to provide a copy of your Social Security card, birth certificate, mortgage or landlord information, copy of insurance policies, bank statements and real estate owned.

SSD (Social Security Disability) is a federal program for only the disabled. It is also referred to as the Social Security Insurance Program. It pays benefits to a disabled individual based on the amount Social Security taxes one has paid from working.

In order to meet the qualifications for SSD, one must not be physically able to work because of a medical condition. This condition must be expected to last at least one year or result in death.

To apply for SSD, an individual must contact the Social Security Administration for an appointment. This should be done as soon as you become disables. You will need your Social Security card, birth certificate, contact information of all physicians, list and dosage of medications, information of where you worked and the kind of work performed, a copy of your wages.