SSI vs. SSDI: What's the Difference for a Child With a Disability?

The short version: SSI is needs-based with a $2,000 asset limit, while SSDI is an earned benefit based on a work record and has no asset limit. For a child with a disability, a third path often matters most — Disabled Adult Child (DAC) benefits, paid on a parent's work record once the child is an adult. Which one your child receives determines whether an inheritance could threaten their benefits, and therefore how you should plan.

What is SSI?

Supplemental Security Income is a needs-based program for people who are aged, blind, or disabled and have very limited income and resources. To qualify and stay eligible, a person generally cannot own more than $2,000 in countable assets. In 2026 the maximum federal payment is about $994 per month for an individual. For most families, the biggest value of SSI isn't the check itself — it's that SSI eligibility usually triggers automatic Medicaid enrollment.

What is SSDI?

Social Security Disability Insurance is an earned benefit. A person qualifies by having worked and paid Social Security taxes long enough to accumulate sufficient work credits (typically the equivalent of ten years of work). Because it's based on a work record rather than financial need, SSDI has no asset limit — a recipient can have significant savings and still qualify. The monthly amount depends on the person's earnings history, and SSDI recipients become eligible for Medicare after a waiting period.

What about a child who has never worked?

Many adults with disabilities never accumulated their own work record — but they can still receive a benefit on a parent's record. These are Disabled Adult Child (DAC) benefits, sometimes called Childhood Disability Benefits. To qualify, the disability must have begun before age 22, the adult child must be unmarried, and a parent must be receiving Social Security retirement or disability benefits, or have died. DAC benefits are typically higher than SSI, carry no asset limit, and can make the adult child eligible for Medicare. Many people receive SSI as children and then transition to DAC when a parent retires or passes away.

The age-18 transition

When a child receiving benefits turns 18, Social Security conducts an "age-18 redetermination," re-evaluating the disability against the stricter adult standard and looking at the individual's own income and ability to work. Earning above the substantial gainful activity threshold — $1,690 per month in 2026, or $2,830 if blind — can affect eligibility. This transition is a critical planning moment, and sometimes an opportunity: a child who didn't qualify because of family income may become eligible at 18 based on their own resources.

Why the difference matters for your planning

Here's the practical takeaway. SSI and the Medicaid attached to it are asset-tested, so a direct inheritance or gift can disqualify an SSI recipient — which is exactly why a special needs trust is essential for families whose child relies on SSI and Medicaid. SSDI and DAC are not asset-tested, so an inheritance generally won't end those benefits. But many DAC recipients still depend on Medicaid for services Medicare doesn't cover, and that Medicaid may carry its own asset rules — so careful planning still matters even when SSI isn't in the picture.

How do you find out which one your child receives?

Check the award or benefit letter from Social Security, which states the program by name, or contact the SSA directly. Knowing the answer is the first step, because it tells you whether an asset limit applies and how a special needs trust fits into your plan. If you're unsure, an advisor who works with special needs families can help you read the details.