Tax Benefits for Caregivers of Adult Children With Disabilities

Parents of a child with a disability often become deeply familiar with the tax and benefit programs available during the child’s early years — the Disability Tax Credit, the Child Disability Benefit, and related provisions. As that child becomes an adult, however, the landscape changes in ways that are not always clearly communicated, and some parents find themselves navigating a transition they did not fully anticipate, often at the same time their child is navigating their own transition to adulthood.

What Continues

The Disability Tax Credit Itself

If your adult child was approved for the DTC as a child — particularly if the approval was for a permanent condition with no renewal required — the credit continues to apply in adulthood. If your child has limited or no taxable income (common for many adults with significant disabilities, particularly if they are not in the workforce or have limited earnings), the unused portion of their DTC can continue to be transferred to a supporting parent, just as it may have been during their childhood.

The Canada Caregiver Credit

As discussed in our companion article, the Canada Caregiver Credit applies to supporting an adult child (as well as other relatives) with a physical or mental impairment who depends on you for support — there is no age limit on the child for this credit, unlike some other provisions that are specifically tied to childhood.

What Changes at Adulthood

The Child Disability Benefit Ends

The Child Disability Benefit, a supplement to the Canada Child Benefit for families with a DTC-eligible child, is tied to eligibility for the Canada Child Benefit itself — which generally ends when the child turns 18. This represents a real reduction in benefit income for many families at this transition, separate from the DTC itself.

The Adult’s Own Income and Benefits Become More Relevant

As a young adult with a disability potentially becomes eligible for their own income sources — provincial disability assistance programs (such as Assured Income for the Severely Handicapped, AISH, in Alberta), part-time or full-time employment, or other benefits — the interaction between these income sources and tax credits becomes more complex. For example, if AISH or similar provincial benefits are received, this may affect (or be affected by) other benefit calculations, and coordinating these requires understanding how each program interacts with the others.

RDSP Contributions Become a Family Decision With New Dimensions

If a Registered Disability Savings Plan (RDSP) was opened for the child — covered in detail in our companion article — contribution and withdrawal decisions continue, but as the beneficiary becomes an adult, questions about the beneficiary’s own legal capacity to manage the RDSP (or whether a legal representative continues to be needed) may arise, depending on the individual’s situation and provincial legislation regarding adult guardianship and trusteeship.

The "Who Manages What" Question in Adulthood

For families where an adult child continues to need significant support with financial and legal matters, questions arise that did not apply during childhood (when parents automatically had legal authority): does the adult child have the legal capacity to manage their own affairs, and if not, has a guardianship, trusteeship, or similar legal arrangement been established to allow a parent or other family member to continue managing financial matters, including tax filings, RDSP contributions, and benefit applications?

This is a legal question, governed by provincial legislation (in Alberta, the Adult Guardianship and Trusteeship Act governs these arrangements), and is separate from — though related to — the tax and benefit questions discussed in this article. Addressing this legal dimension, ideally before it becomes urgent, ensures that the tax and benefit provisions that continue to apply can actually be administered on the adult child’s behalf if needed.

Planning for the Parent’s Own Retirement

For parents who have provided, and continue to provide, significant care for an adult child with a disability, this caregiving role can affect the parent’s own retirement planning in ways similar to those discussed in our article on the hidden cost of caregiving — reduced work hours, paused retirement contributions, and a retirement timeline that may need to account for ongoing caregiving responsibilities that do not end at a typical "empty nest" stage.

Additionally, parents of an adult child with a disability often think about long-term planning questions specific to this situation: what happens to the adult child’s care and finances if the parent becomes unable to provide care, or after the parent’s death? This connects to broader estate planning — including considerations like a Henson trust or similar structures designed to provide for a person with a disability without disqualifying them from means-tested provincial benefits, a specialized area that benefits from working with a lawyer experienced in disability-related estate planning.

Provision	Status After the Child Turns 18
Disability Tax Credit	Continues if eligibility criteria remain met (may require renewal if the original approval was time-limited)
DTC transfer to supporting parent	Continues if the adult child has insufficient income to use the full credit and continues to depend on the parent for support
Canada Caregiver Credit	Continues, with no age limit on the dependant for this specific credit
Child Disability Benefit	Ends (tied to Canada Child Benefit eligibility, which ends around age 18)
RDSP	Continues; legal capacity and management questions may arise depending on the adult’s situation
Provincial disability assistance (e.g., AISH)	May become newly relevant as the individual becomes an adult and potentially eligible in their own right

A Transition Worth Planning For in Advance

Because several of these changes are tied to a specific age (generally around 18), and because some of the planning involved — particularly legal guardianship or trusteeship arrangements, and longer-term estate planning — benefits from lead time rather than being addressed reactively, families with a child approaching adulthood may find it valuable to begin exploring these questions before the transition occurs, rather than discovering the changes after they have already taken effect.