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SocialSecurityNewsThursday, June 4, 2026IndividualPro

Social Security Disability (SSDI): How It Works and Who Qualifies

By SocialSecurityNews Editorial Team · Last reviewed June 4, 2026 · How we review

SSDI pays monthly benefits to workers who can no longer work because of a serious, long-term disability and have paid into Social Security long enough. Here is how to qualify and how it differs from SSI.

Social Security Disability Insurance (SSDI) pays monthly benefits to workers who can no longer work because of a serious, long-term disability — if they have paid into Social Security long enough. Here is how it works and how to qualify.

Two things you must meet

To get SSDI you need both:

  1. Enough work credits. SSDI is an earned benefit. Most adults need to have worked recently — roughly 5 of the last 10 years (younger workers need fewer credits).
  2. SSA's definition of disability. It is strict: you must be unable to do substantial gainful activity because of a medical condition that has lasted, or is expected to last, at least 12 months — or to result in death. Short-term or partial disability does not qualify.

How SSA decides

SSA asks: can you do the work you did before? If not, can you adjust to other work given your age, education, and skills? The decision leans heavily on medical evidence, so thorough documentation from your doctors matters. Earning above a monthly limit called substantial gainful activity (SGA) — an amount SSA adjusts each year — generally disqualifies you.

SSDI vs. SSI

Don't confuse the two:

  • SSDI is based on your work history and the Social Security taxes you paid.
  • SSI (Supplemental Security Income) is needs-based — for people with limited income and resources, with no work history required.

Some people qualify for both.

The process — and the appeals

You can apply online, by phone, or in person. Initial decisions take months, and many claims are denied at first — but you can appeal (reconsideration, then a hearing). Complete, consistent medical records improve your odds.

A few more things to know

  • Your SSDI benefit amount is based on your earnings record, like a retirement benefit.
  • After 24 months of SSDI, you become eligible for Medicare.
  • At full retirement age, SSDI automatically converts to a retirement benefit of the same amount.

This article is for general education and is not financial or medical advice. Confirm eligibility with the Social Security Administration.

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Reference: SocialSecurityNews