How do you apply for the Disability Tax Credit?
You apply on Form T2201, the Disability Tax Credit Certificate. You complete your part, a medical practitioner completes theirs, describing how your impairment affects daily life, and the Canada Revenue Agency decides. Approval can reach back up to 10 years, and it is the approval that unlocks the RDSP and the Canada Disability Benefit.
The Disability Tax Credit application intimidates people out of proportion to its actual difficulty. It is one form, two parts, and a decision made by the CRA. What makes it feel hard is that families rarely see the steps laid out plainly before they start. So here they are, in order, with the honest tips I give every family I work with.
Step one: understand what the CRA is deciding
The CRA is not deciding whether your diagnosis is real. It is deciding whether the effects of your impairment markedly restrict a basic activity of daily life, things like walking, speaking, hearing, seeing, dressing, feeding, or the mental functions of everyday life, and whether those effects are prolonged, meaning they have lasted or are expected to last at least 12 continuous months. There are also paths for life sustaining therapy and for the cumulative effect of several significant restrictions.
That framing should shape everything you write. The application that succeeds describes daily life: what takes far longer than it should, what cannot be done at all, and how much of the day it touches. My pillar guide, the Disability Tax Credit explained, goes deeper on how the credit works once approved.
Step two: complete your part of Form T2201
Your part of the form is the personal side: who the claim is for, contact details, and whether you want the CRA to adjust your past tax returns automatically if the claim is approved. Say yes to that adjustment. Approval can apply to past years, up to 10 years back, when the impairment’s effects were present then too, and the automatic adjustment saves you a second round of paperwork later.
I have a companion guide devoted to the form itself, the T2201 walkthrough, including who can certify which sections. Read it before your medical appointment so you arrive knowing what the practitioner will be asked.
Step three: the medical practitioner’s certification
A medical practitioner certifies the effects of the impairment in their part of the form. Which practitioners can certify depends on the category: medical doctors can certify all categories, and specialists like optometrists, audiologists, occupational therapists, physiotherapists, psychologists, and speech language pathologists can certify the categories within their field. Choose the practitioner who actually knows the daily effects, not simply the most senior name available.
Be candid at that appointment. Practitioners see test results and snapshots. You live with the workarounds, the fatigue, and the activities quietly given up. Describing a real day, honestly and specifically, gives them what they need to certify accurately. Vague forms produce vague decisions.
Step four: submit, wait, and respond if asked
The completed form goes to the CRA, which reviews it and sometimes asks follow up questions before deciding. Processing takes time, and silence during that window is normal rather than a bad sign. If the CRA requests more information, treat it as an opening, not a rejection: it is a chance to put the daily life detail in front of them in writing.
If the answer is no and the effects are genuine, the story is not over. You can ask for a review and, beyond that, file a formal objection. I wrote a full guide on what to do if your DTC application is denied, because a first no is far more common, and far more fixable, than families expect.
Before you mail anything: the two minute check
If you are early in this process and unsure whether your situation fits a category at all, run the free DTC eligibility checker first. It takes about a minute, asks about the areas of daily life the CRA looks at, and shows whether an application is worth your time. It cannot approve you, and nothing online can. It can stop you from talking yourself out of a claim that deserved to be made.
Common questions
What form do I use to apply for the Disability Tax Credit?
Form T2201, the Disability Tax Credit Certificate. You complete your part, a medical practitioner certifies the effects of the impairment, and the CRA decides based on the completed form.
Who can certify the T2201?
Medical doctors can certify all categories. Depending on the category, other practitioners can certify too, including optometrists, audiologists, occupational therapists, physiotherapists, psychologists, and speech language pathologists, within their area of practice.
How far back can a DTC approval apply?
Approval can be applied to past years, generally up to 10 years back, when the effects of the impairment were present in those years. Asking the CRA to adjust past returns on the form starts that process automatically.
What does DTC approval unlock?
Approval can reduce tax owing, and it is the required gate for opening an RDSP with its grants and bonds. It is also required for the Canada Disability Benefit for working age adults.
This guide sits inside the Disability Tax Credit pillar guide, where the credit and everything it unlocks come together.
Sources: Disability Tax Credit, Canada Revenue Agency.
See where you stand: the free DTC eligibility checker takes about a minute and shows whether you, or someone you care for, may qualify for the Disability Tax Credit. No signup, and no pressure.
A quick note: this post is educational, not financial advice. For guidance on your own situation, book a free conversation. You don't have to figure this out alone. I'm here to help you through every step.