Disabled Adult Child Benefits in South Dakota

What Disabled Adult Child Benefits Are

Disabled Adult Child (DAC) benefits allow an adult with a disability that began before age 22 to collect Social Security benefits on a parent's earnings record. The trigger is when a parent retires, becomes disabled, or dies. If the parent paid into Social Security during their working career, the adult child can receive up to 50% of the parent's retirement benefit (or 75% of a deceased parent's benefit).

DAC is separate from SSI. It is a Title II Social Security benefit — earned through the parent's work history — not a means-tested welfare program. There is no asset limit for DAC eligibility. The only requirements are that the adult child has a disability that started before 22 and that they are unmarried (marriage generally ends DAC eligibility, with narrow exceptions for marrying another DAC recipient).

Why DAC Matters More After the Social Security Fairness Act

The Social Security Fairness Act, signed January 5, 2025, repealed both the Windfall Elimination Provision (WEP) and the Government Pension Offset (GPO). These provisions previously reduced Social Security benefits for workers with government pensions from non-covered employment — including many South Dakota public school teachers, state employees, and law enforcement officers.

The repeal is retroactive to benefits payable January 2024 onward. For DAC planning, this means the parent's full Social Security benefit is now available without the old reductions. A public-sector parent's DAC-eligible child receives a larger monthly payment than they would have under the pre-2025 rules.

This makes preserving DAC eligibility an even higher financial priority for South Dakota families with a parent in public employment.

The DAC Medicaid Trap in South Dakota

Here is where families get caught. The DAC monthly payment is often higher than the SSI monthly payment ($994/month in 2026). When the DAC benefit starts, the higher income can push the adult child over the SSI income limit. SSI stops.

Because South Dakota is a 1634 state — where SSI automatically triggers Medicaid — losing SSI can trigger an automatic Medicaid termination notice from the Department of Social Services. If Medicaid drops, the adult child loses health coverage and may also lose eligibility for their CHOICES or Family Support 360 waiver services, since both waivers require active Medicaid.

This is the trap: DAC gives more cash but threatens to take away medical coverage and long-term supports.

How to Prevent the Medicaid Loss

Federal law provides a specific protection. Section 1634(c) of the Social Security Act requires that individuals who lose SSI solely because of DAC benefits must continue to be treated as SSI recipients for Medicaid purposes. South Dakota must honor this protection.

The problem is that the protection is not always applied automatically. When the state system flags the SSI termination, someone at the Department of Social Services has to recognize the DAC-specific exception and code the case correctly.

If you receive a Medicaid termination notice after DAC benefits begin, contact DSS immediately and state clearly: "My child's SSI stopped because of Disabled Adult Child benefits. We need continued Medicaid eligibility under the 1634(c) DAC protection." Request written confirmation that the protection has been applied.

Disability Rights South Dakota (1-800-658-4782) can assist if DSS does not apply the protection correctly. They have handled these cases before and can intervene as your child's advocate.

Preserving DAC Eligibility

DAC eligibility depends on the disability beginning before age 22. If your adult child is already receiving SSI based on a childhood-onset disability, that disability determination is on record with the SSA. No separate DAC disability finding is needed when the parent's Social Security event triggers the benefit.

Two commonly discussed DAC risks are marriage and work above the applicable Substantial Gainful Activity threshold (for a non-blind individual, $1,690/month in 2026). If your adult child works, federal work incentives — including Trial Work Periods and Impairment-Related Work Expenses — can affect how employment is treated.

Our South Dakota SSI at 18 & Adult Disability Benefits Guide includes a Benefits Income Calculator worksheet that maps how DAC, SSI, and earned income interact, and walks through the 1634(c) protection step by step.

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