There is no official list of medical conditions that qualify for Disability Tax Credit approval. That catches most people off guard, because almost every search starts with a diagnosis. The tax agency does not work that way. It decides eligibility by effect: how much an impairment restricts you in everyday life, how often it does so, and how long it has lasted.
The tax agency states this on its own eligibility page. Eligibility for the DTC is based on the effects of the impairment, not a diagnosis or the presence of a medical condition.
For the Disability Tax Credit (DTC), eligibility turns on whether the effect of your condition meets one of the tax agency’s tests. Those tests are below, in the agency’s own wording, so you can judge where you stand before booking an appointment.
Canadian Benefits Association is a private company and is not affiliated with any government agency. You can apply for the Disability Tax Credit yourself, free of charge. Many people do, and we will show you how on this page.
Medical conditions that qualify for disability tax credit: why no list exists
People arrive here looking for a checklist. Diabetes, autism, Crohn’s disease, cerebral palsy, bipolar disorder, chronic pain. If the condition appears, you qualify. If it does not, you do not.
No such list exists, and any site that publishes one is guessing.
Two people with the same diagnosis can get opposite answers from the tax agency, and both answers can be right. One has a serious medical condition that is well managed and causes no significant difficulty with daily living. The other has severe difficulty with an everyday activity, all day, every day, despite treatment. What gets assessed is the second person’s functional limitations, not the label on the chart.
That difference changes how you should approach the application. A form that names a condition and stops there tends to fail. A form that describes what a person cannot do, how long tasks take, and how often help is needed gives the reviewer something they can assess.
What severe and prolonged impairment means
To be eligible for the DTC, a medical practitioner has to certify that you have a severe and prolonged impairment. Those two words carry specific meanings.
Marked restriction
Severe, in the tax agency’s terms, usually means a marked restriction. It is defined by three conditions that all have to be true:
You are unable to do the activity, or it takes you three times longer than someone of similar age without the impairment, even with the use of appropriate therapy, medication, and devices.
The restriction is present all or almost all of the time, generally at least 90%.
The restriction has lasted, or is expected to last, for a continuous period of at least 12 months.
Read the first point again, because it does a lot of work. The comparison is against someone of similar age. The three times longer threshold is the measure, and the assessment happens with your treatment and devices in place, not without them. Someone whose walking is restored to near normal by a brace is measured with the brace on.
Prolonged, and the 12 month rule
Prolonged means the impairment has lasted, or is expected to last, at least 12 months without interruption. A serious injury that resolves in eight months does not meet this test, however difficult those eight months were.
The continuous period requirement is also why episodic conditions are harder to document. A condition that flares and remits can still qualify, but the file has to show that the restriction itself is present almost all of the time, not that flare-ups happen often.
The nine categories of daily living
The tax agency groups the activities of daily living into categories. You need a marked restriction in one of them, significant limitations in two or more, or you need to receive life-sustaining therapy.
These are the official categories, quoted as written:
Category | What is being assessed |
|---|---|
Walking | Whether you can walk on your own, or need three times longer than someone of similar age |
Mental functions | Adaptive functioning, memory, judgment, problem solving, goal setting, and emotional regulation |
Dressing | Putting on and removing clothing, not choosing, finding, or laundering it |
Feeding | Preparing food and eating it, not shopping for groceries |
Eliminating (bowel or bladder functions) | Managing bowel and bladder function, including catheterization and ostomy care |
Hearing | Understanding a familiar person in a quiet setting, even with a device |
Speaking | Being understood by a familiar person in a quiet setting |
Vision | Visual acuity and field of vision, measured with correction |
Life-sustaining therapy | Therapy needed to support a vital function |
Each category has its own official criteria checklist, and each has its own page here. The wording differs more than people expect. Dressing excludes laundry, and feeding excludes grocery shopping. People lose applications on exactly that kind of detail.
Cumulative effect of significant limitations
Plenty of people have several impairments, none of which reaches a marked restriction on its own. There is a route for that, and it is easy to miss.
The cumulative effect rule combines the effects of two or more limitations. To qualify this way:
The limitations exist together all or almost all of the time, generally at least 90%.
Their combined effect is equivalent to being unable, or taking three times longer than someone of similar age, to do an activity in one of the categories.
That combined effect is present all or substantially all of the time, even with appropriate therapy, devices, and medication.
Life-sustaining therapy cannot be part of a cumulative effect claim. It stands on its own as a separate category.
The rule helps people whose difficulties are spread across several activities of daily living rather than concentrated in one. Someone with moderate walking difficulty, moderate dressing difficulty, and slowed mental functions may not meet the bar in any single category, yet clearly meets it once you look at the day as a whole. If that describes you, say so on the application, and make sure your medical practitioner describes the combined effects rather than three separate mild problems.
Life-sustaining therapy
This category works differently from the others. It measures the time the therapy takes, rather than how restricted you are in an activity.
To qualify, all four of these have to be true:
The therapy is needed to support a vital function. Dialysis, insulin therapy, oxygen therapy, and chest physiotherapy are the official examples.
The therapy is needed at least two times per week.
The therapy is needed for an average of at least 14 hours per week, taking time away from everyday activities.
The impairment has lasted, or is expected to last, for a continuous period of at least 12 months.
What counts toward the 14 hours
The 14 hour count is usually the part that decides these applications. The tax agency counts time spent on the therapy itself and on activities directly required to administer it, such as determining a dose. It does not count time spent on activities that happen anyway, and it does not count time a device works on its own without your involvement.
For a child too young to manage their own therapy, the time a parent or caregiver spends administering and supervising it can count.
Type 1 diabetes
People with Type 1 diabetes meet the eligibility criteria under life-sustaining therapy. For the 2021 tax year and later, medical practitioners no longer have to provide details of the therapy on the application.
Older guides still get this wrong, so check the date on anything you read about diabetes and the DTC. If you were denied before 2021 on a Type 1 diabetes claim, the current rules may give a different answer.
Conditions people ask about most often
None of the following automatically qualifies or automatically fails. Each one comes down to effect.
Mental health conditions
A mental health condition is assessed under mental functions. Depression, anxiety, bipolar disorder, schizophrenia, and PTSD can all support an application when the impairment markedly restricts adaptive functioning, memory, judgment, or emotional regulation almost all of the time. Situational stress and conditions that respond well to treatment generally will not.
Chronic pain, arthritis, and fibromyalgia
Chronic pain has no category of its own. These claims usually succeed, when they succeed, through the cumulative effect rule, because pain tends to slow several activities at once rather than stopping any single one. Document how long ordinary tasks take on a typical day, including a bad day and a better one.
Children, autism, and attention difficulties
Children are assessed against the same categories, with the comparison drawn against a child of similar age. Autism and attention difficulties are usually assessed under mental functions. Approval for a child can also affect the child disability benefit, which is paid with the Canada child benefit.
Which medical practitioner can certify your application
Part B of the DTC application has to be completed by a qualified medical practitioner, and not every practitioner can certify every category. The practitioner certifies the effects of the impairment, not the diagnosis.
Practitioner | Impairments they can certify |
|---|---|
Medical doctor | All impairments |
Nurse practitioner | All impairments |
Optometrist | Vision |
Audiologist | Hearing |
Occupational therapist | Walking, feeding, dressing |
Physiotherapist | Walking |
Psychologist | Mental functions |
Speech-language pathologist | Speaking |
That table saves people appointments. If your claim is about hearing, an audiologist can certify it, and you do not need to book time with a family doctor first. Practitioners may charge a fee to complete the form, and that fee may be claimable as a medical expense. Ask about it before you book.
How to apply, and what it costs
You can apply at any time of year, and applying is free. The application has two parts: Part A, which you complete, and Part B, which your medical practitioner completes.
There are two ways to submit, and both parts have to go the same way. The digital application form is completed online, and your practitioner uses a reference number you give them, which submits the application automatically. The paper Form T2201, Disability Tax Credit Certificate, is printed and mailed to a tax centre.
You can no longer send DTC forms through the submit documents section of your online tax account. It is the digital application form or mail.
If you plan to split or transfer the credit to a supporting family member, including a spouse or common law partner, put their information in Part A rather than sorting it out later.
If you are not sure whether you qualify
Apply anyway.
The tax agency says the same thing on its own site: even if your answers suggest you may not be eligible, you can still send in an application, and it will determine eligibility based on the information your medical practitioner provides. Your practitioner describes the clinical picture and you describe what your days are like. The decision is made on the basis of both.
If you have read this far and concluded that your impairment is real but not markedly restricting, that is a useful answer, and it saved you an appointment fee. We would rather you reach it here than after a denial.
What happens after approval
Approval lets you claim the federal disability amount on your income tax return, reducing the federal income tax you owe. Because the DTC is a non-refundable tax credit, it reduces tax payable rather than generating a payment. It is not a monthly payment and it does not arrive as a cheque. Someone with no taxable income receives nothing directly from it, though the credit may transfer to a supporting family member.
Approval also affects related programs. The registered disability savings plan requires DTC eligibility. The child disability benefit and the Canada Disability Benefit both use DTC approval as part of their eligibility. If you are approved for past years, you may be able to have prior returns reassessed.
How Canadian Benefits Association can help
We prepare Disability Tax Credit paperwork, and that is all we do. Thirteen years of it, 100% of our practice. We coordinate with your medical practitioner, handle the follow-up correspondence with the tax agency, and deal with the tax adjustments after approval, including reassessment of prior years within the ten year window.
We charge nothing upfront. You pay only if a refund is issued.
Authorization runs through your own online tax account, and you can revoke it at any time. Our registrations are public and verifiable: Group ID GPF6SB, EFILE K7112, Ontario Corporation 002381754, Business Name Registration 1001179177. We are a BBB accredited business.
None of that is a reason you have to use us. Anyone can apply for the Disability Tax Credit themselves, free of charge. What we sell is documentation quality and the willingness to keep working a file after it has been submitted. If your situation is simple and your practitioner writes a thorough Part B, you may not need us at all.
Common questions about DTC eligibility
What medical conditions qualify for the Disability Tax Credit in Canada? No condition qualifies by name. The tax agency assesses the effects of an impairment against nine categories of daily living, not a diagnosis.
Is it hard to qualify for the Disability Tax Credit? The standard is high. The restriction generally has to be present at least 90% of the time and last at least 12 months. In our experience, more applications fail on thin documentation than on genuine ineligibility.
Can someone with depression and anxiety qualify? Yes, when the impairment markedly restricts mental functions necessary for everyday life, or combines with another limitation under the cumulative effect rule. A diagnosis on its own is not enough.
How do I know if I meet the DTC criteria? Work through the criteria on this page and the official eligibility checklists. If you are uncertain, apply. The tax agency makes the determination.
Do I have to reapply every year? No. Approval covers a set period, which may be several years or indefinite. Your notice of determination states the years covered.
Can I claim the DTC for past years? Often, yes. If eligibility is approved for earlier years, prior income tax returns can be adjusted.
