<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> Social Security Disability Insurance (SSD or SSDI) is a payroll tax - funded, federal insurance program of the United States government . It is managed by the Social Security Administration and is designed to provide income supplements to people who are physically restricted in their ability to be employed because of a notable disability, usually a physical disability . SSD can be supplied on either a temporary or permanent basis, usually directly correlated to whether the person's disability is temporary or permanent . </P> <P> Unlike Supplemental Security Income (SSI), SSD does not depend on the income of the disabled individual receiving it . A legitimately disabled person (a finding based on legal and medical justification) of any income level can theoretically receive SSD . ("Disability" under SSDI is measured by a different standard than under the Americans with Disabilities Act .) Most SSI recipients are below an administratively - mandated income threshold, and indeed these individuals must in fact stay below that threshold to continue receiving SSI; but this is not the case with SSD . </P>

Where does the money for social security disability come from