SSI at 18: How to Prepare for the Age-18 Redetermination

Social Security rechecks every child on SSI under the adult disability rules after the 18th birthday, usually within that first year, and about half get a first decision that SSI should stop. Appeals win back a real share: among young adults whose first decision came in fiscal year 2023, 37% of those who asked for reconsideration kept SSI, yet fewer than half of those cut off (44.5%) appealed. Start now: update your contact details with SSA, collect the past year of medical and school records, and get your teen into an IEP, 504 plan or vocational rehabilitation plan before SSA's first decision.

What changes when your child turns 18

Starting the month after the birthday month, your income and savings stop counting; SSA looks only at your child's own. If your income lowered the check, it rises from that month, and free housing from you starts to count, so start the housing payment below then. If your child was turned down as a minor because of your family's income or savings, apply by the month after the birthday month; each later month is a month of SSI lost.

The medical test changes too: the child standard asked about daily tasks, and the adult standard asks whether severe impairments leave your child unable to do substantial work. Your state's Disability Determination Services (DDS) applies the rules for a new adult application but skips the earnings test, so a job, even one paying more than $1,690 a month in 2026 ($1,770 in 2027), keeps the review on medical grounds.

SSA starts on the case about two months before the birthday and usually contacts you within the year after it. A letter announces the review, then a form asks for medicines, hospital stays and surgeries, doctor and clinic visits, counseling and therapy, work, schools, special classes or tutoring, and the teachers and counselors who know your child's condition.

If a parent gets Social Security retirement or disability benefits, or has died after working enough, your child can also claim childhood disability benefits on that parent's record. The disability must have started before 22, your child must be unmarried, and no work history is needed; see our guide to child benefits on a parent's SSDI.

What to do before SSA's letter arrives

1. Keep SSA's letters coming. Update your address and phone with SSA at 1-800-772-1213 (TTY 1-800-325-0778), 8 a.m. to 7 p.m. on weekdays.
2. Keep treatment current. Your teen should see a doctor for every condition you want SSA to weigh and follow the treatment prescribed. Skipping it without good cause is one of the grounds SSA uses to end disability.
3. Build the evidence list. Write down every doctor, clinic, therapist and counselor from the past year with visit dates, plus hospital stays and current medicines. Add the latest IEP or 504 plan, school evaluations, teachers who know your child's limits, and any job with its hours, pay and supports.
4. Get a school or job plan signed before the first decision. Ask the school to keep the IEP in place after 18 or to write a Section 504 plan, and apply to your state vocational rehabilitation agency for an individualized plan for employment (in California, the Department of Rehabilitation). Tell SSA about the plan when the review begins and send a copy; that report starts SSA's Section 301 process.
5. Answer DDS and show up. Return each DDS form by its due date, sending what you have while records are pending (see our guide to late DDS review forms). Go to any consultative exam DDS schedules. If your teen has a good reason to miss it, such as illness, call before the date and DDS schedules another; missing it without good cause lets SSA end disability.
6. Settle who handles the money. SSA presumes an adult can manage benefits. If your child needs help, tell SSA during the review that you want to remain representative payee. A power of attorney or a joint bank account gives you no authority over SSI; payees apply on Form SSA-11, usually in person. A parent payee who lives with the adult child skips the yearly payee report but keeps spending records.

Set up the household so the check stays full

If your adult child lives with you, pays less than a fair share of housing costs and gets all meals from the household, SSA cuts SSI by one-third of the federal rate: $331.33 of $994 a month in 2026, and $343 of $1,029 from January 2027. If some meals come from elsewhere, SSA values the free housing instead, at most $351.33 in 2026 ($363 in 2027), which cuts SSI by up to $331.33 when SSI is the only income. Food stopped counting on September 30, 2024.

• Pay a share. Your child pays at least an equal share of the household's monthly shelter costs: rent or mortgage, property taxes, heating fuel, gas, electricity, water, sewer and garbage, averaged over the past 12 months and divided by everyone in the home, children included. With $1,600 a month in those costs and four people, the share is $400. Pay it monthly from your child's account and keep the record.
• SNAP or cash aid in the home. If anyone else in the household gets SNAP, TANF, SSI or other need-based assistance on SSA's list, it is a public assistance household, and SSA counts no housing support from its members.

Your child's countable savings must stay at $2,000 or less. An ABLE account holds more. SSI ignores the first $100,000 in it, contributions can total $20,000 in 2026, and a payee can deposit SSI into it. Since January 1, 2026, people whose disability began before age 46 qualify. For a dedicated account from past-due SSI, see our dedicated account guide.

When the decision letter comes

If SSA finds your child disabled under the adult rules, SSI continues. If it finds disability ended on medical grounds, SSI is paid through the second month after the month of the notice: a notice mailed in March means checks for March, April and May.

• If SSA says disability ended, appeal within 10 days to keep the checks. Download Form SSA-789, Request for Reconsideration – Disability Cessation, and file it at your local Social Security office in person or by mail, stating that you want payments to continue during the appeal. SSA treats a letter as received 5 days after its date, so the 10-day window closes 15 days after the date on the letter. Check box 1 to ask for a disability hearing with a disability hearing officer; SSA mails the date at least 20 days ahead.
• If you missed the 10 days, appeal anyway. Reconsideration stays open for 60 days after you receive the letter; continued payments then need good cause for the late request.
• If your teen is in an IEP, a 504 plan, a VR plan or an approved PASS that started before the first decision, ask for Section 301 payments. For a student 18 through 21 in an IEP, the plan qualifies by rule. SSI continues until your child finishes or stops the program or SSA decides the plan no longer helps, and a move to a new plan within 90 days, such as an IEP ending and a VR plan starting, keeps it going. Your child can appeal and draw continued payments meanwhile; SSA rules on Section 301 after the appeal.

What you can get and who helps for free

• Continued SSI through the appeal. Payments continue through reconsideration and, if your child asks for a hearing and continued payments within 10 days of the reconsideration notice, until the administrative law judge decides.
• Waiver if you lose. If the appeal fails, SSA asks for the continued payments back; your child can request a waiver, and SSA presumes good faith when your child cooperated with the appeal.
• Free counseling and legal help. Benefits counselors (WIPA) explain how work affects SSI from age 14, and Protection and Advocacy (PABSS) offices handle legal problems for beneficiaries who want to work. Find both at choosework.ssa.gov/findhelp or 1-866-968-7842 (TTY 1-866-833-2967).
• A representative. Bring in a disability lawyer or advocate if reconsideration goes against your child or SSA says your child failed to cooperate. Name the representative on Form SSA-1696; SSA must approve any fee in writing first.

Request to file with Form SSA-789

To: Social Security Administration, [local office address]. Re: Age-18 redetermination notice dated [date]. Name: [full name]. Social Security number: [number].

I request reconsideration of the decision that my disability ended. I want my SSI payments to continue during this appeal, and I want a disability hearing.

I take part in [an IEP at ____ High School / an individualized plan for employment with ____], which began on [date]. Please also decide whether I qualify for continued payments under Section 301.

New evidence attached: [records from Dr. ____ dated ____; IEP dated ____; statement from teacher ____].

[Signature] [Printed name] [Phone] [Date]

Today

1. Call SSA to confirm your address and phone, and ask whether the age-18 review has started.
2. Request the past 12 months of records from each doctor and a copy of the current IEP or 504 plan.
3. Book a meeting with the school or your state VR agency to get a written plan signed before SSA's first decision.

What comes back: SSA's letter announcing the review, the DDS form, an exam appointment if DDS needs more, then the written decision. When it arrives, mark the date 15 days after the date on the letter: that is your deadline to appeal and keep the checks.