Severe and Prolonged Impairment
What does Severe and Prolonged Impairment mean?
Severe and prolonged impairment is a specific phrase used in certain Canadian government benefit and tax programs — most notably the Disability Tax Credit — to describe when a disability or developmental difference significantly restricts a person's ability to carry out basic daily activities, and when that restriction has lasted or is expected to last for a considerable length of time. The exact meaning of 'severe' and 'prolonged' is defined by each program's own criteria, not by a diagnosis alone. For families of autistic children or children with complex support needs, understanding this language can be an important part of navigating federal and provincial financial supports.
Why this term matters
Meeting the definition of severe and prolonged impairment may open access to meaningful financial supports for Canadian families, such as the Disability Tax Credit, the Child Disability Benefit, or related provincial programs — so understanding how the term is applied can be worth exploring with a qualified professional or a program administrator.
Canadian context
In the federal Disability Tax Credit context, a qualified professional must certify that the impairment meets the program's specific definition of severe and prolonged; eligibility is ultimately decided by the Canada Revenue Agency, not by the diagnosing professional. Requirements for related provincial or territorial programs may differ, and it is always advisable to review the specific criteria for each program being considered.
Not sure what applies to your family? KidPath helps you understand available programs, organize next steps, and navigate support with more clarity.
Start your free support check →Related terms
Find out what support may be available.
Take the first step toward a clearer plan for funding, services, and next steps — free, and built for families navigating autism support.