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Turning 18: the checklist
At 18, the rules reset. SSI starts counting only your adult child’s income and assets instead of yours, so many families qualify for the first time. Legal decisions move to your child unless you set up supports first. This checklist covers the year before and the year after the birthday, in order, with sources.
The federal programs behind this page
Four federal pillars come up on every page of this site. Here they are in one place, because the turning-18 year touches all of them.
EPSDT: Medicaid’s child mandate
EPSDT is the child health benefit built into Medicaid. For every enrolled child under 21, the state must cover any medically necessary service that corrects or improves the child’s condition, even if the state does not cover that service for adults. This is the legal basis that requires state Medicaid programs to cover ABA for children.
VerifiedSource: Medicaid.gov, Early and Periodic Screening, Diagnostic, and Treatment · How we verify
IDEA: the school law
IDEA gives eligible children with disabilities the right to a free appropriate public education and special education services from age 3 through age 21, and requires every district to identify and evaluate children who may need it (Child Find).
VerifiedSource: Parent Center Hub (federally funded parent information network), IDEA · How we verify
SSI: the cash benefit
Supplemental Security Income is a monthly payment for people with disabilities who have very low income and resources, and in most states it brings Medicaid with it. The full turning-18 mechanics are below.
MHPAEA: federal mental health parity
If a health plan covers mental health benefits, the federal Mental Health Parity and Addiction Equity Act bars it from making those benefits harder to get than comparable medical care. It applies even to self-funded employer plans that state mandates cannot reach.
VerifiedSource: U.S. Department of Labor, EBSA, Mental Health and Substance Use Disorder Parity · How we verify
How to use parity in a real denial fight lives in the denial kit.
Why 18 changes the money
For a child under 18 who lives at home, Social Security counts part of the parents’ income and resources as if they belonged to the child. This is called deeming, and it is why many clearly disabled children in working families are denied SSI. The denial is about money, not about whether the child is disabled.
Deeming ends at 18
Parental deeming stops the month after the child turns 18. From that point, only the young adult’s own income and resources count. A teen who was denied SSI purely because of the parents’ income can often qualify at 18.
VerifiedSource: Social Security Administration, SSI deeming rules · How we verify
What SSI pays and the resource limit
The maximum federal SSI payment for 2026 is $994 per month for an eligible individual, and countable resources must stay under $2,000. A home the person lives in and one vehicle do not count. In most states, SSI approval brings Medicaid with it.
VerifiedSource: Social Security Administration, SSI for children and 2026 payment amounts · How we verify
6 to 12 months before: documents, SSI prep, ABLE account
- Gather the record: current diagnostic documentation, school records, and therapy reports. At 18, SSA re-checks your child against the adult definition of disability, and documentation of daily functioning carries the case.
- Open the ABLE account before savings or gifts push your child over the $2,000 resource limit.
- Start the decision-support conversation (next section) early enough to have papers signed before the birthday.
The ABLE account, in numbers
The first $100,000 in an ABLE account does not count against the $2,000 SSI resource limit. Anyone whose disability began before age 46 is eligible (the limit moved from 26 to 46 on January 1, 2026), and the 2026 annual contribution limit is $19,000 across all contributors.
VerifiedSource: ABLE National Resource Center; IRS 2026 inflation adjustments · How we verify
The decision-support choice: guardianship, supported decision-making, powers of attorney
At 18, the legal right to make medical, financial, and educational decisions moves to your adult child. Families have a menu of supports, from least to most restrictive: informal supported decision-making, powers of attorney and health care surrogate designations, and full guardianship, which removes rights through a court process. Less restrictive options preserve your child’s adulthood; guardianship is the last resort, not the default.
Florida guardianship runs through the courts under chapter 744, Florida Statutes, and Florida law also recognizes less restrictive alternatives. Our plain-language comparison of the Florida options is still under attorney review, so treat this section as orientation, not legal advice, and talk to a Florida attorney before filing anything.
Not yet verified as of . Treat this as unconfirmed. What this meansSource: Chapter 744, Florida Statutes · How we verify
At 18: apply for SSI
- Apply the month of the 18th birthday or soon after, since deeming stops the month after the birthday.
- Expect the adult disability standard: SSA re-checks against the adult definition, so bring the updated documentation you gathered above.
- If approved, Medicaid usually follows, which matters more than the check for many families.
After 18: adult waivers, the iBudget picture, and what changes at 22
The iBudget priority ladder for young adults
Florida’s iBudget waitlist priority categories include Category 5 for people expected to graduate secondary school within 12 months who need support for employment or postsecondary education, and Category 6 for people 21 or older. If your child has waited in the lowest category since early childhood, these transition years are when priority can rise.
VerifiedSource: APD pre-enrollment priority categories (s. 393.065(5), F.S.) · How we verify
The two cliffs: 21 and 22
Medicaid’s EPSDT child mandate covers children under 21, so at 21 services covered under it must requalify under the state’s adult rules. IDEA school services run through age 21, so the school-based day structure ends around the 22nd birthday.
VerifiedSource: Medicaid.gov (EPSDT); Parent Center Hub (IDEA) · How we verify
Florida specifics, including the iBudget application itself, live on the Florida page. Vocational rehabilitation, the transition IEP, and the age-22 planning guide are on the playbooks roadmap.
Common questions
My child was denied SSI because of our income. Should we reapply at 18?
Yes. Deeming stops the month after the 18th birthday, so only your adult child’s own income and resources count from then on. A teen denied purely because of family income can often qualify at 18.
SSA deeming rules. Verified .
Will my child lose SSI by having savings?
Countable resources must stay under $2,000, but the first $100,000 in an ABLE account does not count toward that limit. Route gifts and savings there instead of a regular account in the child’s name.
SSA; ABLE National Resource Center. Verified .
Does turning 18 mean we need guardianship?
Not automatically. The options run from supported decision-making and powers of attorney to guardianship, which removes rights and is the most restrictive path. This choice deserves individual legal advice.
Our Florida comparison is under attorney review; see the flagged receipt above.
What actually changes at 21 and 22?
EPSDT ends at 21, and IDEA school services run through age 21, so the school-based structure ends around 22. Adult waiver slots are the main replacement, which is why joining those lists early matters.
Medicaid.gov; Parent Center Hub. Verified .