Child SSI Eligibility Criteria
To receive SSI as a child under 18: the child must have a medically determinable physical or mental impairment that causes marked and severe functional limitations, expected to last at least 12 months or result in death; AND the family income and resources must be below SSA's limits. Both conditions must be met simultaneously — a severe disability with high family income doesn't qualify, and low family income with a minor condition doesn't qualify.
The Disability Standard for Children
SSA uses a different standard for children than adults. For children, SSA evaluates: does the child's impairment meet or equal a Listing (a specific condition described in SSA's Blue Book); or does the child have marked limitations in two domains of functioning or extreme limitation in one domain? The six domains: acquiring and using information, attending and completing tasks, interacting and relating with others, moving about and manipulating objects, caring for oneself, and health and physical well-being. Documentation of these functional limitations from treating physicians, teachers, therapists, and parents is essential.
Family Income Rules
For a child under 18 living with parents, SSA "deems" a portion of the parents' income and resources to the child — treating part of the parents' income as if it belonged to the child. The deeming formula is complex and excludes certain income (work expenses, some earned income). Generally, families with income roughly below 150–200% FPL may qualify depending on family size and earned vs unearned income. When a child turns 18, parental income is no longer deemed — the child's own income and resources (which are typically much lower) are used, making many former ineligible children suddenly eligible at 18.
How to Apply
Apply through Social Security: call 1-800-772-1213 or visit ssa.gov to start the application. You'll need comprehensive medical documentation of the child's condition — records from all treating providers, school records (IEPs, report cards, teacher observations), therapy records, and a detailed description of how the condition affects the child's daily functioning. Having strong documentation before applying reduces the chance of initial denial. Many families benefit from a disability attorney who works on contingency — they receive a fee only from backpay if the claim is approved.
Redeterminations and Age-18 Review
SSA reviews continuing eligibility periodically (typically every 1–3 years). At age 18, SSA conducts a mandatory "age-18 redetermination" using the adult disability standard — which is stricter. A child who qualifies under the child standard may not qualify under the adult standard. Begin preparing for this review at age 16–17: ensure comprehensive recent medical documentation is in place, consider applying for SSDI if the young adult has any work history, and consult with a disability attorney about transition planning. See Transitioning from Child to Adult Benefits.
Medicaid Through SSI
In most states, a child receiving SSI is automatically enrolled in Medicaid. This Medicaid coverage provides comprehensive healthcare, therapy, and specialty services. Even in states that don't automatically link SSI and Medicaid, children receiving SSI typically qualify for Medicaid easily due to low income. This Medicaid coverage is especially valuable for children with complex medical and therapy needs that would otherwise be very expensive.
SSI Amount for Children
The maximum SSI Federal Benefit Rate for 2026 is $967/month for an individual. The actual amount a child receives may be reduced by the deeming formula (parental income allocation) — a child in a family with modest income may receive less than the full $967. Most states also pay a small supplemental amount on top of the federal rate. When the child turns 18 and parental income is no longer deemed, the child typically receives the full federal benefit rate.