Title II of the Social Security Act creates Old-Age, Survivors, and Disability Insurance (OASDI). The disability portion — SSDI — pays monthly cash benefits to insured workers who meet SSA’s definition of disability, and in some cases to eligible spouses and children.
In January 2026 SSA paid about $12.1 billion to roughly 8.1 million SSDI beneficiaries, including about 7.1 million disabled workers whose average benefit was $1,633 a month (Congressional Research Service / SSA Monthly Statistical Snapshot).
How the check is calculated
Your benefit starts from your Average Indexed Monthly Earnings and Primary Insurance Amount — the same family of formulas used for retirement. It is not a flat national amount and it is not means-tested the way SSI is.
Waiting period and Medicare
Benefits generally begin after five full calendar months from the established onset date (ALS is excepted). SSA pays one month behind. Medicare usually starts after 24 months of SSDI entitlement.
Continuing disability reviews
If improvement is expected, SSA may review in 6–18 months; if possible, about every 3 years; if not expected, about every 7 years. Work activity, medical recovery, or failing to cooperate can stop benefits.
This page is educational. For a screening, request a free consultation — this campaign does not issue benefits.
See 2026 eligibility rules