Montana SSI and Social Security Benefits for a Grandchild Living With You

A grandchild living with you in Montana may qualify for federal Social Security benefits or Supplemental Security Income (SSI) — two separate programs with different rules. Understanding which applies, and how each interacts with state benefits like TANF and Medicaid, can prevent you from leaving money on the table or losing benefits you already have.

Social Security Dependent and Survivor Benefits

If one of the child's parents is deceased, disabled and receiving Social Security disability (SSDI), or retired and collecting Social Security, the child may be entitled to monthly benefits on that parent's earnings record. These are called dependent or survivor benefits.

A grandchild can also qualify on a grandparent's earnings record, but only under narrow conditions: both of the child's parents must be deceased or disabled, and the grandchild must have been living with you and receiving at least half their support from you at the time the event occurred (your retirement, disability, or the other conditions the Social Security Administration defines).

To apply, visit your local SSA field office with the child's birth certificate, Social Security number, and documentation of the parent's death or disability. If the child qualifies, SSA will need a representative payee — typically you, as the caregiver — to receive and manage the payments on the child's behalf.

Supplemental Security Income (SSI)

SSI is a needs-based federal program for people who are aged, blind, or disabled and have very limited income and resources. A child living with you can qualify for SSI if the child has a qualifying disability (a physical or mental condition that causes marked and severe functional limitations) and meets SSI's financial tests.

When a grandparent — rather than a parent — is the caregiver, SSI's "deeming" rules work in your favor. SSA only deems income from a parent to a child. A grandparent's income is not deemed to the child, which often makes the child financially eligible even if you have significant retirement income or savings.

The child's own countable resources must stay within SSI limits, and any income the child receives in their own name (such as child support) is counted. But your pension, your Social Security check, and your bank accounts are not part of the calculation.

How These Interact With Montana TANF

This is the detail that trips up many caregivers: SSI payments are excluded from TANF eligibility and grant calculations in Montana. If a child receives SSI, that income does not reduce the child-only TANF grant and is not counted when determining whether the child qualifies.

Social Security survivor or dependent benefits are treated differently — they are counted as the child's unearned income for TANF purposes. If a child receives $300 per month in survivor benefits, that $300 is subtracted from the TANF child-only grant amount. For one child, the grant would be $425 minus $300, or $125.

A child cannot receive both SSI and Social Security at the same time (SSI offsets dollar-for-dollar against Social Security). But the distinction matters for TANF: if the child switches from SSI to survivor benefits (or vice versa), the TANF calculation changes.

Applying for Representative Payee Status

Whether the child receives Social Security or SSI, SSA requires a representative payee to manage the funds. As the grandparent caregiver, you apply at your local SSA field office. You will need to provide your identification, the child's Social Security number, and documentation showing the child lives with you. SSA reviews payee applications and may contact references.

As representative payee, you must use the funds for the child's current needs — food, clothing, shelter, medical care, and personal items. SSA requires an annual accounting form showing how the money was spent.

The Montana Kinship Financial Help Guide covers how Social Security and SSI fit into the full picture of benefits available to relative caregivers, with a coordination checklist so no program conflicts with another.

See more Montana guides →