SSI vs SSDI vs DAC Benefits Vermont: Which Applies to Your Disabled Adult Child

When a young adult with a disability turns 18 in Vermont, families often hear about SSI, SSDI, and "disabled adult child" benefits without understanding which program applies to their situation — or that their young adult might qualify for more than one. These three programs have different eligibility rules, different payment amounts, and very different effects on Medicaid coverage through Green Mountain Care.

SSI: The Needs-Based Benefit

Supplemental Security Income is the most common starting point for young adults with disabilities who have limited work history. SSI is needs-based, meaning it requires both a qualifying disability and low income and assets. The 2026 individual resource limit is $2,000 in countable assets.

In Vermont, the maximum SSI payment for an individual is $994 per month (the federal benefit rate) plus the state AABD supplement of $55.68 for individuals living independently with cooking facilities. Vermont is a Section 1634 state, so SSI recipients automatically receive Medicaid through Green Mountain Care — no separate Medicaid application needed.

A critical detail: when a child receiving SSI turns 18, parental income and resources are no longer "deemed" to the child. This sometimes makes a young adult newly eligible for SSI at 18 even if the family's income previously disqualified them.

SSDI: The Insurance-Based Benefit

Social Security Disability Insurance requires that the disabled individual has their own work history with enough Social Security tax contributions to have earned sufficient work credits. Most young adults turning 18 have not worked enough to qualify on their own record. SSDI typically applies to adults who became disabled after building a work history.

SSDI payments are calculated from the worker's average indexed monthly earnings — there is no flat maximum the way SSI works. SSDI recipients become eligible for Medicare after a 24-month waiting period from the date of entitlement, which is separate from and in addition to any Medicaid coverage.

DAC: Disabled Adult Child Benefits

This is the program that catches families off guard. Disabled Adult Child benefits — also called Childhood Disability Benefits — are paid on a parent's Social Security record, not the young adult's own. Your adult child may qualify for DAC benefits when a parent retires, becomes disabled, or dies, as long as:

• The disability began before age 22
• The adult child is unmarried (with exceptions for certain marriages after age 18)
• The parent has sufficient Social Security work credits

DAC benefits pay 50% of the parent's retirement or disability benefit, or 75% of a deceased parent's benefit. These amounts frequently exceed SSI payments. For a parent whose full retirement benefit is $2,400 per month, the DAC benefit would be $1,200 — significantly more than the SSI maximum of $994.

A crucial point: DAC benefits are classified as unearned income for SSI purposes. If the DAC payment is large enough, it will reduce or eliminate SSI. However, the DAC benefit also creates its own pathway to Medicare (after 24 months), and in some cases Medicaid coverage can be preserved through Vermont's MABD program or a Medicare Savings Program buy-in.

The WEP/GPO Repeal Changes the Calculation

Before January 2025, the Government Pension Offset and Windfall Elimination Provision complicated DAC planning for families whose parent had a pension from non-covered government employment — such as a Vermont teacher, police officer, or municipal worker who did not pay Social Security taxes.

The Social Security Fairness Act, signed January 5, 2025, permanently repealed both WEP and GPO for benefits payable from January 2024 forward. Families who were previously told that their child could not receive DAC benefits because of a parent's government pension should contact SSA to file a new claim. The offsets no longer apply, and retroactive adjustments back to January 2024 have been processed.

Which Combination Applies to You

Many Vermont families do not realize that SSI and DAC benefits can be received simultaneously, though DAC payments can reduce or eliminate SSI after applicable exclusions. The strategic question is whether maintaining even a small SSI payment preserves automatic Medicaid, which in turn preserves eligibility for developmental services waiver funding.

A benefits counselor at HireAbility Vermont can model specific scenarios. Their Work Incentives Counseling program was established specifically to help families navigate these interactions without accidentally losing coverage.

For the full comparison table, benefits interaction flowchart, and Vermont-specific contact list, see our Vermont SSI at 18 & Adult Disability Benefits Guide.

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