Blog post

The Disability Tax Credit (DTC) is one of the most valuable — and most underused — tax measures in Canada. The Canada Revenue Agency estimates that hundreds of thousands of eligible Canadians have never applied for it. With the CRA rolling out changes to the application process in the summer of 2026, this is a good moment to step back and look at the whole picture: what the credit is, where it came from, who can claim it, and what’s changing.

What is the Disability Tax Credit?

The DTC is a non-refundable federal tax credit that reduces the income tax payable by a person with a severe and prolonged impairment — or by a family member who supports them. It’s set out in section 118.3 of the Income Tax Act. The idea is simple: living with a disability carries extra costs, and the credit is meant to offset some of that burden through the tax system.

A few important characteristics:

• It reduces tax owed; it is not a monthly payment. If you have little or no tax payable, the credit can be transferred to a supporting spouse, common-law partner, or other relative so the household still benefits.
• It can be claimed retroactively. If you qualified in earlier years, the CRA can adjust returns going back up to 10 years, which can produce a meaningful one-time refund.
• It is a gateway. This is the part most people miss. DTC approval is the key that unlocks several other programs (more on that below).

Currently the federal disability amount is up to $10,138, with an additional supplement of up to $5,914 for those under 18. The amounts are indexed to inflation each year, and most provinces and territories add their own disability amount on top of the federal one, so the total tax relief is larger than the federal figure alone.

A brief history

Before the mid-1980s, Canada offered a narrow tax deduction aimed mainly at people who were blind or used a wheelchair. As the understanding of disability broadened, the measure was redesigned and the Disability Tax Credit was introduced in 1988, opening eligibility to a much wider range of physical and mental impairments.

The next major shift came in 2005, when the CRA added the “cumulative effect of significant restrictions” category. This recognized that someone might not be markedly restricted in any single activity, yet still face a significant overall limitation when several moderate restrictions are combined. That change opened the door for many people whose conditions don’t fit neatly into one box.

More recently, the DTC has taken on added importance as the foundation for the new Canada Disability Benefit, putting fresh attention on how accessible the credit is and how it’s administered.

Who can claim the DTC?

Eligibility is based on how an impairment affects daily functioning — not on the diagnosis itself. Two people with the same condition can get different answers depending on how their day-to-day life is affected.

To qualify, the impairment generally must be both:

• Severe — you are unable, or take an inordinate amount of time, to perform a basic activity of daily living, all or substantially all of the time (the CRA generally interprets this as at least 90% of the time); and
• Prolonged — it has lasted, or is expected to last, at least 12 continuous months.

The CRA recognizes impairment in these categories:

• Walking
• Mental functions necessary for everyday life
• Dressing
• Feeding
• Eliminating (bowel or bladder functions)
• Hearing
• Speaking
• Vision
• Life-sustaining therapy (therapy needed to support a vital function)
• The cumulative effect of significant restrictions in two or more of the above

A common misconception is that only visible physical disabilities qualify. In fact, mental health and cognitive conditions can qualify — including severe depression, anxiety disorders, bipolar disorder, autism spectrum disorder, and ADHD — when they markedly restrict the mental functions needed for everyday life. The key word is “markedly”: mild or moderate limitations usually won’t meet the bar, but severe, well-documented cases can.

Eligibility must be certified by a qualified medical practitioner on Form T2201. Depending on the impairment, that can be a physician, nurse practitioner, optometrist, audiologist, psychologist, physiotherapist, occupational therapist, or speech-language pathologist. Choosing the practitioner who knows your condition best — and asking them to describe your limitations in specific detail, including your worst days — tends to improve the odds of approval. Many applications that are initially denied succeed on review or appeal, particularly for mental health and cumulative-effect claims.

The programs DTC approval unlocks

This is why the DTC matters far beyond the credit itself. Approval can give you access to:

• The Registered Disability Savings Plan (RDSP) — a tax-sheltered savings vehicle with generous government grants and bonds. You cannot open one without DTC approval.
• The Canada Disability Benefit — a newer federal income-support payment for working-age, low-income Canadians, which requires DTC eligibility.
• The Child Disability Benefit — a tax-free monthly top-up to the Canada Child Benefit for families caring for a child who qualifies for the DTC.
• The Canada Workers Benefit disability supplement — an additional amount for eligible lower-income workers.
• The Home Buyers’ Amount and Home Accessibility Tax Credit — including the ability to use the Home Buyers’ Plan without being a first-time buyer.

For many families, the RDSP and these linked benefits are worth far more over time than the annual credit itself.

How to apply — and what’s changing in 2026

You apply by completing Form T2201, the Disability Tax Credit Certificate. One part is filled in by the applicant (or their legal representative), and one part is certified by the medical practitioner. You can apply at any time of year, even if you have no income to report.

The CRA is updating the process this summer to validate information faster and reduce delays. Two firm dates matter:

July 14, 2026 — You will no longer be able to use the “submit documents” section of your CRA account to send DTC applications or related documents, unless the CRA has specifically asked you for more information on an existing case.

September 8, 2026 — Older versions of Form T2201 (anything from before 2023) will no longer be accepted. If your form predates 2023, you’ll have to start fresh with a current version.

The easiest path: apply online

The CRA is steering applicants toward the online DTC application form in the CRA account, and there are real advantages:

• Always current — the online form is automatically the latest version, so you can’t accidentally submit an outdated one.
• Harder to get wrong — it guides you through the relevant sections and skips the ones that don’t apply, reducing the missing-information errors that send applications back.
• Shared access — both you and your medical practitioner can work in the same online form, speeding up the back-and-forth.

Online submissions are also processed faster than paper.

A mistake to avoid

Don’t use the “submit documents” section to file a new application. That section is only for responding when the CRA requests additional information on a case already open. If the CRA needs more from you, they’ll contact you directly through your CRA account or by mail, with a case reference number to use when you upload documents.

If you prefer paper

Paper is still accepted. Just download the latest 2023-or-later Form T2201 from Canada.ca, complete and sign it (you and your practitioner), and mail it to your nearest CRA tax centre — keeping the September 8, 2026 cutoff in mind.

The bottom line

The Disability Tax Credit is worth applying for if there’s any chance you or a family member qualifies — both for the credit itself and for the doors it opens to the RDSP, the Canada Disability Benefit, and other supports. Eligibility turns on how an impairment affects daily life, not the label attached to it, and approval can be backdated up to a decade.

If you’re applying in 2026, apply online through your CRA account where you can, make sure any paper form is the 2023-or-later version, and don’t route a new application through “submit documents” after July 14.

This article is for general information only and is not tax advice. Eligibility, amounts, and procedures change, and your situation may differ. For guidance on your specific circumstances — including how the DTC and RDSP fit into broader cross-border tax and financial planning — please reach out to our team.

Sources: Canada Revenue Agency, “Help speed up your disability tax credit application” (June 16, 2026) and “Disability tax credit (DTC)” / “Persons with disabilities, their caregivers, and the CRA” pages, Canada.ca.