Disability Tax Credit Canada: Eligibility, T2201 and Family Claims

At a glance

The Disability Tax Credit (DTC) can lower income tax for a person with a severe and prolonged impairment, or an eligible supporting family member. It is not a monthly cash payment. You apply with Form T2201, a qualified medical practitioner certifies the impairment's effects, and CRA decides which years are approved.

If you are wondering whether a diagnosis is enough, the answer is no: CRA looks at the effect on specific everyday functions or qualifying life-sustaining therapy. This guide explains the steps in order, defines the key terms, and links to separate examples for more complicated situations.

1. What does the DTC actually do?

The DTC is a non-refundable tax credit. 'Non-refundable' means it reduces income tax owing, potentially to zero, but cannot generate a cash payment when no tax is otherwise payable. For 2026, the federal disability amount is $10,341, producing a maximum federal reduction of about $1,448 at the 14% credit rate, subject to the claim and other factors. Provincial credits are calculated separately.

A DTC amount is not the same as a refund. Example: if a qualifying individual otherwise owes $1,000 in eligible federal tax, a credit worth up to $1,448 can reduce that federal tax to zero, but the additional $448 is not sent as a cheque merely because it is unused.

2. Who can qualify?

CRA evaluates severe and prolonged limitations—generally expected to last at least 12 continuous months—under defined categories such as walking, dressing, feeding, eliminating, speaking, hearing, vision and mental functions necessary for daily living.

The restrictions must meet specific criteria. A 'marked restriction' generally means an activity is impossible or takes an inordinate amount of time all or substantially all of the time, ordinarily 90% or more. The combined effect of significant limitations in two or more categories can sometimes qualify even when no single category meets that marked test.

There is also a distinct life-sustaining therapy route, which often involves treatment at least twice weekly for an average of 14 hours a week under CRA's qualifying time rules. Specific Type 1 diabetes rules apply for 2021 and later.

3. How does Form T2201 work?

The person or legal representative completes Part A, including supporting-relative information if relevant. A qualified medical practitioner completes Part B, documenting actual impairment effects, dates and duration. CRA offers digital and paper application options.

Example: 'Has arthritis' is a diagnosis. 'Even with prescribed aids, dressing takes an inordinate amount of time almost every morning for over 18 months' communicates the functional impact that CRA must assess. Medical descriptions must remain accurate and practitioner-certified.

4. What happens after approval?

The notice of determination lists the approved eligibility years. The person normally claims the appropriate disability amount on their annual income-tax return. If the person has too little tax owing, certain unused amounts may be transferable to a spouse or supporting relative under separate criteria.

For parents, a child's DTC eligibility can also be relevant to the Child Disability Benefit, a separate income-tested tax-free monthly payment linked to Canada child benefit rules. DTC approval does not mean every family receives the same benefit.

5. Can you claim past years?

If CRA approves eligibility for 2022 through 2026, prior-year tax returns may be eligible for adjustment. The tax savings depend on how much tax was owing in each approved year and whether unused amounts can be transferred. CRA's taxpayer relief framework generally has a 10-year lookback, subject to its rules.

You can use CRA's change-return process, and certain application routes support automatic past-year adjustments. Check the years actually reassessed before filing a duplicate adjustment.

6. What if CRA denies or expires the DTC?

Read the specific reason on the notice. CRA might require evidence about daily function, frequency or duration. You can provide further information, reapply when a certificate expires or challenge a determination. A formal objection generally has a 90-day deadline from the notice.

Keep your previous T2201, practitioner letters and determination. Acting on the actual reason is more effective than repeatedly submitting the same incomplete description.

7. What should you do next?

Make a simple list of affected daily activities, the assistance needed, how long tasks take, and the duration of the impairment. Then discuss that accurate information with the practitioner, complete Part A and track CRA's decision. If the medical claim is approved, calculate the tax year and family transfer claims separately.