Disability Tax Credit Denied? Here's How to Fight Back

Why the CRA Denies DTC Applications

Before fighting a denial, you need to understand why it happened. CRA is required to state the reason in the Notice of Determination. Here are the five most common denial reasons and what they actually mean:

1. "Your impairment does not markedly restrict a basic activity of daily living"

This is the most common denial reason. It doesn't necessarily mean you don't qualify. It means the information provided in Part B of your T2201 didn't convince the assessor that the restriction was severe enough (takes 3x longer, or cannot be done at all) and frequent enough (90% of the time). The fix: stronger, more specific functional documentation from your practitioner.

2. "The duration requirement has not been met"

CRA requires the impairment to last, or be expected to last, 12+ consecutive months. If your practitioner didn't clearly state that the impairment is prolonged, or if the form suggests it's situational or temporary, CRA may deny on this ground. The fix: have your practitioner add a clear statement about duration.

3. "The therapy time requirement has not been met" (for life-sustaining therapy claims)

For conditions like Type 1 diabetes, CRA requires 14+ hours per week of therapy time. If the hours documented don't add up to this threshold, the claim is denied. The fix: a detailed breakdown of all therapy activities and their time, adding up to 14+ hours/week.

4. "The certifying practitioner is not authorized for this type of impairment"

This is a procedural denial, your form was certified by a practitioner who isn't on CRA's approved list for that impairment category. The fix: straightforward, have the correct practitioner type complete a new Part B. See our T2201 guide for the practitioner table.

5. "Impairment is controlled with medication or therapy"

This is a more nuanced denial. CRA's position is that if medication fully controls your condition to the point where you have no marked restriction, you may not qualify. However, the legal standard is that CRA must consider the impact of the medication on quality of life and any side effects, not just whether the condition is technically managed. Many appeals on this ground succeed with better documentation of medication side effects and residual functional impairment.

Denial-Fix Matrix: Match CRA's Language to the Right Evidence

The single best predictor of a successful appeal is responding to CRA's exact wording, not the general topic of the denial. Pull out the Notice of Determination and find the phrase that matches the row below. The evidence column tells you what to gather next.

If your denial letter contains a phrase that does not match any row, treat the entire denial as a "marked restriction" issue and use the first row's evidence approach. Most non-matching wording is a paraphrase of "your description was too general."

Five Mistakes Practitioners Make on Part B

Many denials are not your fault. They are the result of a well-meaning practitioner filling out the T2201 the way they were trained for insurance forms, not the way CRA reads them. If you can spot these errors before submission, you can avoid most denials.

1. Treating "marked restriction" as a yes/no checkbox

The boxes on Part B are checked, but the comments field is blank or has a single sentence. CRA reviewers rely on the narrative to confirm severity. Ask your practitioner to add 2 to 4 sentences per restricted activity describing how long it takes, how often it happens, and what aids you use.

2. Saying "manages with medication"

This phrase, even in passing, can trigger a denial under "controlled with therapy." If medication is part of your treatment, the form needs to also note residual restrictions despite treatment and any time spent on the therapy itself.

3. Leaving the cumulative-effect section blank

If you have two or more partial restrictions, the cumulative-effect section is often your strongest path to approval. Many practitioners skip it entirely. Ask for it to be completed even if no single restriction reaches the marked threshold on its own.

4. Vague duration language

"Long-standing" or "chronic" is not enough. CRA wants a specific year of onset and a clear statement that the impairment is expected to last at least 12 continuous months.

5. Using a diagnostic code only

An ICD-10 code, on its own, does not establish how the condition restricts you. The form is about function, not diagnosis. Two people with the same diagnostic code can have very different DTC outcomes.

The Statutory and Case-Law Framework

Disability Tax Credit appeals are decided under a defined statutory framework. Knowing the underlying authorities is useful when preparing a Notice of Objection, because the strongest objections quote the statute and align the medical evidence with the exact criteria CRA reviewers apply.

Primary statutory authority

The DTC is created by section 118.3 of the Income Tax Act, RSC 1985, c 1 (5th Supp). The section defines what counts as a "severe and prolonged impairment in physical or mental functions," what "markedly restricted" means, the conditions under which the cumulative-effect rule applies, and the medical-certification requirement. The full text is published by the Department of Justice Canada at laws-lois.justice.gc.ca, Income Tax Act section 118.3.

The appeals process itself is governed by section 165 of the Income Tax Act (Notice of Objection) and the Tax Court of Canada Act, RSC 1985, c T-2, which gives the Tax Court of Canada exclusive original jurisdiction over Income Tax Act disputes. Most DTC appeals at Tax Court proceed under the Tax Court of Canada Rules (Informal Procedure), SOR/90-688b, which is faster and less costly than the General Procedure.

CRA's interpretation of section 118.3

The Canada Revenue Agency publishes its official interpretation of section 118.3 in Income Tax Folio S1-F1-C2, Disability Tax Credit. The folio summarises how CRA applies the marked restriction test, the cumulative effect rule, and the life-sustaining therapy route, and it references the Tax Court precedents CRA relies on. Reading the folio before drafting a Notice of Objection helps align your evidence with the criteria CRA reviewers apply. The folio is available at canada.ca, Income Tax Folio S1-F1-C2.

Finding Tax Court precedents

The Tax Court of Canada has decided many DTC appeals under section 118.3, with outcomes that turn on the strength of the medical evidence and the cumulative-effect analysis. Reading a few decisions in your specific category (mental functions, walking, life-sustaining therapy) is one of the most useful preparation steps before drafting an objection. Full decisions are published on the Canadian Legal Information Institute (CanLII) at canlii.org, Tax Court of Canada. Searching CanLII for "disability tax credit" plus your impairment category will return relevant cases. Quoting a Tax Court decision in your Notice of Objection demonstrates that you understand how the section 118.3 test has been applied to facts similar to yours.

Practical takeaway

You do not need to cite case law in a Notice of Objection. Most successful objections succeed on stronger medical documentation alone. But where CRA's stated denial reason hinges on a contested interpretation of the statute (controlled by medication, what counts as cumulative effect, what counts as a basic activity of daily living), a brief reference to section 118.3 itself, the Income Tax Folio, and one relevant Tax Court decision shows the Appeals Division reviewer that your objection is grounded in the framework CRA is required to apply.

The 90-Day Window: Your Appeal Timeline

When CRA sends a Notice of Determination denying your DTC, the clock starts. You have 90 calendar days from the date on the notice (not the date you received it) to file a formal Notice of Objection.

Don't procrastinate. The appeal process takes time, and you need those 90 days to gather stronger medical documentation, consult with your practitioner, and write a compelling objection. Filing on day 89 is technically valid, but filing on day 91 is not.

If you miss the 90-day window, you can apply to the Tax Court of Canada for an extension, but this adds complexity and cost. Better to act promptly.

Step-by-Step: The DTC Appeal Process

1. Read the Denial Letter Carefully

   CRA must specify why they denied your application. Read this carefully, it's your roadmap. The specific language CRA uses tells you exactly what you need to address in your appeal.

2. Return to Your Medical Practitioner

   Bring a copy of the denial to your doctor, specialist, or other certifying practitioner. Show them exactly what CRA said. Ask them if they can provide a more detailed letter or a supplementary medical report that directly addresses CRA's stated reason for denial.

   This supplementary letter should include: specific functional descriptions, how long activities take, how often restrictions occur, the practitioner's professional assessment of severity, and any objective measurements (mobility assessments, psychological test scores, audiological results).

3. Gather Supporting Documentation

   Beyond your practitioner's letter, consider including:

   • Specialist reports (neurologist, rheumatologist, psychiatrist, etc.)
   • Hospital records, discharge summaries, specialist referrals
   • Occupational therapist or physiotherapist functional assessments
   • Records showing ongoing treatment (prescription records, therapy records)
   • A personal statement from you (or a caregiver) describing daily functional limitations in specific detail

4. Write Your Notice of Objection

   The Notice of Objection is a formal letter to CRA's Appeals Division. It should:

   • Reference your name, SIN, and the date of the Notice of Determination being appealed
   • Clearly state that you are objecting to the determination
   • State the grounds for objection (address each denial reason CRA gave)
   • Reference the attached medical documentation that supports your position
   • Request a review by the Appeals Division

   You can file this by mail, or submit through CRA My Account under "Submit documents." Include all supporting documentation.

5. CRA Appeals Division Reviews Your Case

   The Appeals Division is separate from the original assessors. An appeals officer reviews your file, the original Part B, and your new documentation. They may contact your medical practitioner. This process typically takes 3-6 months.

   If the appeals officer agrees with you, they'll issue a revised determination, approved. If they maintain the denial, you'll receive a Confirmation letter.

6. Tax Court of Canada (Last Resort)

   If the CRA Appeals Division confirms the denial and you still believe you qualify, you can appeal to the Tax Court of Canada within 90 days of the Confirmation. Tax Court hearings for DTC cases are typically handled under the Informal Procedure, which is less formal and less expensive than regular court proceedings. You can self-represent, though a tax lawyer is strongly recommended.

   Tax Court decisions on DTC matters have gone in favour of taxpayers in many cases, particularly where the medical evidence was strong and CRA's interpretation of "markedly restricts" was overly narrow.

Writing a Strong Objection Letter: What Works

The single most powerful element of a successful objection is specific, functional medical documentation. Here's an example of language that works versus language that doesn't:

Sample Notice of Objection: A Working Template

The template below shows the structure that most successful Notice of Objection letters follow. Replace bracketed placeholders with your details and attach all referenced documentation. CRA does not require a specific form for a Notice of Objection on a DTC determination, but a clearly structured letter speeds up review.

You can mail this letter to the Sudbury Tax Centre at the address above, or upload it digitally through CRA My Account under "Submit documents." Keep a copy of everything you send, including the date stamp from your courier or My Account confirmation.

Can You Reapply Instead of Appealing?

Yes. Filing a new T2201 with stronger documentation is a valid alternative to appealing. This can actually be faster than the formal appeals process if the denial was purely a documentation issue.

The advantage of reapplying: you start fresh with a clean, well-prepared T2201. The disadvantage: if the new T2201 is also denied, you've lost time, and retroactive years may have slipped further back. If there's any dispute about your legal eligibility (not just documentation quality), the formal appeal preserves your rights more effectively.

Frequently Asked Questions