The disability tax credit is one of the most underused credits in the Canadian tax system. A lot of people who qualify don’t even know it exists, or they assume their condition doesn’t count. I’ve helped clients claim this credit and get back thousands in prior-year adjustments they had no idea they were entitled to.
If you or a family member has a serious and prolonged physical or mental impairment, this is worth looking into.
Last updated: April 2026
What Is the Disability Tax Credit?
The DTC is a non-refundable federal tax credit that reduces the income tax you owe. For 2025, the base disability amount is $9,872, which translates to a federal tax reduction of about $1,481 (15% of $9,872). When you add the provincial credit on top, the total tax savings range from roughly $1,700 to $2,300 depending on your province.
For individuals under 18, there’s a supplemental amount of up to $5,758 (2025), which can bring the total federal credit to over $2,300.
If the person with the disability doesn’t have enough taxable income to use the full credit, the unused portion can be transferred to a spouse, parent, or other supporting person.
Who Qualifies?
You don’t need to be unable to work. That’s a common misconception. The DTC is about functional limitations, not your ability to hold a job.
CRA says you may qualify if you have a severe and prolonged impairment in one or more of these areas:
- Vision
- Speaking
- Hearing
- Walking
- Eliminating (bowel or bladder functions)
- Feeding or dressing yourself
- Mental functions necessary for everyday life (memory, problem-solving, adaptive functioning)
“Severe” means the impairment significantly restricts the activity, all or substantially all of the time, even with medication, therapy, or devices.
“Prolonged” means the impairment has lasted, or is expected to last, at least 12 continuous months.
You can also qualify based on the cumulative effect of significant restrictions in two or more categories, even if no single category alone would qualify.
Conditions That Often Qualify (But People Don’t Realize)
Beyond obvious physical disabilities, these conditions frequently qualify:
- Type 1 diabetes (time spent on life-sustaining therapy, 14+ hours/week)
- ADHD (if it significantly impacts mental functions for daily life)
- Autism spectrum disorder
- Crohn’s disease or colitis (eliminating)
- Chronic pain conditions (walking, dressing)
- Anxiety and depression (if severe enough to affect daily functioning)
- Learning disabilities in children
- Celiac disease (in some cases, based on cumulative effects)
The key isn’t the diagnosis. It’s how the condition affects your daily life.
How to Apply: Step by Step
Step 1: Get Form T2201
Download Form T2201 (Disability Tax Credit Certificate) from CRA’s website. Part A is completed by you. Part B is completed by a qualified medical practitioner.
Step 2: Choose the Right Practitioner
Different practitioners can certify different impairments:
| Impairment | Who Can Certify |
| Vision | Optometrist or medical doctor |
| Hearing | Audiologist or medical doctor |
| Walking / physical | Medical doctor, physiotherapist, or occupational therapist |
| Mental functions | Medical doctor or psychologist |
| Feeding / dressing | Medical doctor or occupational therapist |
| Speaking | Speech-language pathologist or medical doctor |
| Life-sustaining therapy | Medical doctor |
Step 3: Make Sure the Form is Filled Out Properly
This is where most applications fail. The practitioner needs to describe the effects of the impairment in detail, not just state the diagnosis. CRA doesn’t approve based on what you have. They approve based on how it limits your daily life.
Be thorough. Describe your worst days, not your best ones. If the practitioner is rushing through it, push back. A poorly filled out T2201 is the #1 reason applications get denied.
Step 4: Submit and Wait
Submit the completed T2201 to CRA by mail or through your My Account. Processing typically takes 6 to 8 weeks. CRA will send you a notice telling you if you’re approved or denied, and for which tax years the credit applies.
What If You’re Denied?
Don’t give up. A denial isn’t always the final answer.
- Request a review: You can send additional medical documentation within 60 days
- Have the practitioner provide a letter with more detail about how the impairment affects daily life
- File a formal objection within 90 days of the notice of determination
In my experience, a lot of initial denials get overturned when the practitioner provides better documentation of the functional limitations.
Claiming for Prior Years
Here’s where the real money is. If you were eligible for the DTC in prior years but never claimed it, you can request adjustments going back up to 10 years under CRA’s Taxpayer Relief Provisions.
File Form T1-ADJ for each year you want to amend. If the DTC is worth approximately $2,000/year and you go back 10 years, that’s potentially $20,000 in tax refunds. I’ve seen clients get cheques like this. It takes some paperwork, but it’s worth it.
Related Benefits You Unlock with the DTC
Getting approved for the DTC also opens the door to:
- Registered Disability Savings Plan (RDSP): Tax-sheltered savings with government matching grants up to $3,500/year and bonds up to $1,000/year
- Canada Workers Benefit disability supplement: Additional refundable credit for low-income workers
- Child Disability Benefit: Up to $3,322/year (2025) for children under 18 who qualify for the DTC
Frequently Asked Questions
Can I claim the disability tax credit if I’m still working?
Yes. The DTC has nothing to do with your ability to work. It’s about functional limitations in daily life. Plenty of people with qualifying conditions hold full-time jobs.
Do I need to reapply every year?
No. Once approved, you keep claiming the credit as long as your condition persists. CRA will specify the approved period on your notice (it can be indefinite for permanent conditions). You only need to resubmit if CRA requests a new certificate or if your condition changes.
Can I transfer the disability amount to a family member?
Yes. If you don’t have enough taxable income to use the full credit, you can transfer the unused portion to your spouse, common-law partner, parent, grandparent, child, grandchild, sibling, aunt, uncle, niece, or nephew.
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- Working from Home Tax Deductions in Canada: Complete Guide
Think You Might Qualify?
If you or a dependant has a condition that limits daily functioning, it’s worth exploring. The application costs nothing, and the potential benefit is significant, especially if you can claim prior years. Contact us and we can help you figure out if it makes sense for your situation.