If you or someone in your family lives with a serious, long-term physical or mental impairment, the Canada Disability Tax Credit (DTC) could lower your tax bill by a meaningful amount every single year. Yet a lot of eligible Canadians never apply, either because they’ve never heard of it or because the paperwork looks intimidating.

This guide breaks down exactly who qualifies, roughly how much the credit is worth, how the T2201 application actually works, and why the DTC is often called the “gateway” to several other federal disability benefits. Let’s get into it.

1. What Is the Disability Tax Credit

The DTC is a non-refundable federal tax credit for individuals with a severe and prolonged impairment in physical or mental functions, as certified by a qualified medical practitioner. “Non-refundable” simply means the credit reduces the tax you owe. It isn’t paid out as a cheque if you don’t have tax payable, which is why the option to transfer it to a supporting family member matters (more on that below).

For the 2025 tax year, the CRA lists the disability amount at $10,138. If the person was under 18 at the end of the year, a supplement of up to $5,914 can be added, and that supplement is reduced when child care or attendant care expenses were claimed for the child. The credit is worked out by multiplying the amount by the lowest federal tax rate, which was 14.5% for 2025 (the rate drops to 14% from 2026). That puts the federal saving at roughly $1,470 for 2025, and a little over $1,400 a year at the 14% rate. Most provinces and territories add their own credit on top, so your total depends on where you live.

These amounts are indexed every year, so check the current-year figure on the CRA’s Disability Tax Credit page before you file.

2. Who Is Eligible

The CRA’s eligibility test comes down to two main paths:

• A severe restriction in one category such as vision, walking, dressing, feeding, elimination (bowel or bladder function), hearing, speaking, or mental functions.
• Significant limitations in two or more categories combined, even if none of them alone would qualify on its own.

There is also a separate route for life-sustaining therapy: the therapy must support a vital function, be needed at least twice a week, and take an average of at least 14 hours a week away from everyday activities. Time spent exercising, picking up medication, or traveling to treatment does not count toward those 14 hours.

Two other conditions matter a lot:

• The impairment must be prolonged, meaning it has lasted, or is expected to last, at least 12 continuous months.
• For the restriction categories, the impairment must be present all or almost all of the time, which the CRA generally treats as 90% of the time or more.

The credit can be claimed by the person with the impairment, or by a supporting family member (spouse, parent, or another eligible relative) if that person has little or no tax payable and the family member provides at least one of the basic necessities of life: food, shelter, or clothing.

Having a diagnosis is not enough by itself. The CRA decides based on how much the condition limits daily life and on what your medical practitioner certifies, not on the name of the condition. Common qualifying situations include mobility limitations from arthritis or a stroke, vision loss, hearing loss, chronic mental health conditions, and impairments that require extensive daily therapy. Every case is assessed individually, so it’s worth applying if you’re unsure rather than assuming you won’t qualify.

3. How to Apply (Form T2201)

The application itself is called Form T2201, Disability Tax Credit Certificate, and it has two parts:

• Part A is completed by the applicant (or their legal representative) with basic personal information. It also asks for your consent for the CRA to contact your medical practitioner if needed and to adjust your returns for previous years.
• Part B must be completed and certified by a qualified medical practitioner. A medical doctor or nurse practitioner can certify any impairment. Others are limited to their area: optometrists for vision, audiologists for hearing, occupational therapists for walking, feeding, and dressing, physiotherapists for walking, psychologists for mental functions, and speech-language pathologists for speaking.

Here is how the process works in practice:

1. Ask your medical practitioner whether your condition is likely to meet the CRA’s criteria before you invest time in the form.
2. Choose one method: the digital form or paper. You can’t mix the two. With the digital route you complete Part A through your CRA account (or by phone) and get a reference number, which you give to your practitioner. They use it once to complete Part B, and the application is then submitted automatically. The reference number is valid for up to 12 months.
3. With the paper route, you fill in and sign Part A, your practitioner completes Part B, and either of you mails the complete form. Part A and Part B that arrive separately are not treated as a complete application.
4. Wait for the CRA’s written decision and keep a copy of everything you send.
5. After approval, claim the credit on your return, and ask for adjustments to past years if the CRA didn’t already make them.

DTC forms can no longer be sent through the “submit documents” section of CRA My Account (the CRA changed this on July 14), so use the digital application or the mail. The CRA doesn’t publish a fixed processing time on the page. It points applicants to its targeted processing times, and it advises submitting the application before you file your tax return to avoid a possible delay. If your practitioner charges a fee for completing the form, you pay it yourself, but the fee may be claimable as a medical expense (line 33099 or 33199).

Double-check that every section, especially Part B, is filled in fully before you submit, since missing details are one of the most common causes of delay.

4. Where the Credit Goes on Your Return

Who claims the credit depends on whose impairment it is and who can actually use it. These are the lines the CRA uses for the 2025 return:

Situation	Line on the return	2025 amount
You claim your own approved DTC	31600	$10,138
You claim for a dependant who is not your spouse or common-law partner	31800	Transferred disability amount (up to $10,138, plus up to $5,914 if under 18)
You claim the unused part from your spouse or common-law partner	32600	Unused portion only

Because the credit is non-refundable, a person with little or no tax to pay may not be able to use all of it. The unused part can be transferred to a supporting family member, such as a spouse, child, grandchild, parent, sibling, or aunt or uncle, who is relied on for at least one of food, shelter, or clothing. A transfer is never paid out as cash. If the supporter wasn’t named on the original application, they need to send the CRA a signed written request.

Which route fits you? A quick checklist:

• You pay income tax and have the condition: claim it yourself on line 31600.
• You pay little or no tax and have a spouse who does: the unused amount can be transferred to your spouse, who uses line 32600.
• You support a parent, grandparent, child, or other relative with an approved DTC: you may be able to claim the transferred amount on line 31800 if they depend on you for food, shelter, or clothing.
• Your application was denied before: your condition may have changed, so a fresh application with updated medical details is worth discussing with your practitioner.

5. Why the DTC Matters Beyond the Tax Credit Itself

This is the part a lot of people miss: getting approved for the DTC isn’t just about that year’s tax return. DTC approval is often the key that unlocks eligibility for several other programs, including:

• The Registered Disability Savings Plan (RDSP), a long-term savings vehicle with government matching grants and bonds.
• The Canada Disability Benefit, a newer federal support payment for working-age persons with disabilities.
• The Child Disability Benefit, an additional amount for families raising a child who qualifies for the DTC.

In other words, one approved T2201 can quietly open several doors at once, which is exactly why it’s worth applying even if the tax savings alone seem modest.

6. Claiming Past Years: A Worked Example

If you’re approved and your impairment already existed in earlier years, the credit can apply to those years too. The CRA allows claims going back up to 10 years. If you gave consent in Part A, the CRA will adjust the earlier returns for you after approval. If you didn’t, you can ask the CRA in writing to adjust your previous returns, or make the changes yourself online. A credit from past years may result in a refund.

Here is a simple illustration. These numbers are assumptions to show the arithmetic, not a promise of what you will get:

1. Assume the disability amount in a past year was about $9,500 and the federal rate was 15%.
2. $9,500 × 15% = $1,425 in federal credit for that year.
3. If you had enough tax to use it, and approval covers eight past years at similar amounts, that is roughly $11,400 federally, before any provincial credit.

Your real amount will be lower if you didn’t owe enough tax in some years, and it will change if part of the credit was already transferred to someone else. Amounts were also lower in the earlier years, and the CRA adjusts each year’s return separately. Approval does not change old returns on its own unless the consent was given, so don’t assume it happened without checking.

7. Common Reasons Applications Get Rejected

Not every DTC application is approved, and the reasons for denial tend to repeat themselves:

• Vague or incomplete medical certification: Part B needs specific, concrete details about how the impairment restricts daily function, not general statements.
• Not meeting the “markedly restricted” threshold: the impairment must restrict the person all or almost all of the time, so a condition that’s serious but intermittent may not qualify on its own.
• Relying on the diagnosis alone: the question is how your daily life is limited, not what the condition is called.
• Skipping the transfer: if you have no tax to pay, unused credit may still help a supporting family member.

If your practitioner can describe your specific limitations in detail (how long tasks take, what assistance is needed, how often symptoms occur), that documentation matters far more than a diagnosis label alone.

8. FAQ

Can I claim the DTC for a spouse or dependent?

Yes. If the person with the impairment doesn’t have enough taxable income to use the full credit, an eligible supporting family member, such as a spouse, parent, or another relative who supports them, can claim the unused portion on their own return.

Is the DTC the same as the Canada Disability Benefit?

No, they’re related but separate. The DTC is a tax credit that reduces income tax owed, while the Canada Disability Benefit is a direct payment program for eligible working-age persons with disabilities. Being approved for the DTC is generally a required step toward Canada Disability Benefit eligibility, so the two are closely linked even though they work differently.

What if my application is denied? Can I appeal?

Yes. If the CRA denies your DTC application, you can request a review, provide additional medical information to support your case, or file a formal objection. Many successful appeals come down to submitting more detailed medical documentation the second time around, so a denial isn’t necessarily the final word.

Final Thoughts

The Disability Tax Credit can feel like just another government form, but for many Canadians 50 and older, or their family caregivers, it’s a meaningful reduction in taxes owed, a possible refund for up to 10 earlier years, and a doorway to programs like the RDSP and Canada Disability Benefit. Talk to your medical practitioner about Form T2201, be as specific as possible about how your condition affects daily life, and confirm the current year’s dollar amounts on the CRA’s official DTC page.