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What is the difference between Social Security Disability Insurance and Supplemental Security Income?

Social Security disability (SSDI) is awarded to disabled people who have generally worked five of the past ten years and have paid a Social Security tax on their income. The work requirement can be waived for applicants under age 22.

Supplemental Security Income (SSI) payments are made on the basis of financial need to adults and children who are disabled, blind, or have limited income and resources. Whereas Social Security disability (SSDI) is funded from the Social Security tax, Supplemental Security Income (SSI) is financed by general tax revenues.