If you or someone you care for lives with a serious physical or mental impairment, the Disability Tax Credit (DTC) may be one of the most valuable tax benefits available to you as a Canadian. Despite its significance, the DTC is frequently unclaimed — either because people are unaware they qualify, or because the application process feels overwhelming. This guide walks through everything you need to know about the DTC in 2025, including who qualifies, how to apply, and how to maximise your claim.
The Disability Tax Credit is a non-refundable federal income tax credit designed to provide tax relief to Canadians with severe and prolonged impairments in physical or mental functions. Because it is non-refundable, the credit reduces the amount of federal income tax you owe — but it does not generate a cash refund on its own if you have no tax balance to offset.
That said, the DTC is far from a dead end if you owe little or no tax. Any portion of the credit you cannot use can be transferred to a supporting person — such as a spouse, common-law partner, or parent — who can then apply it against their own tax liability. Beyond the immediate tax savings, DTC approval is also the gateway to opening a Registered Disability Savings Plan (RDSP), a powerful long-term savings vehicle that comes with federal grants and bonds worth up to $90,000 over a lifetime.
To qualify, a person must have a severe and prolonged impairment. CRA defines this as an impairment that has lasted, or is expected to last, at least 12 consecutive months. The impairment must also result in a marked restriction in at least one of the following basic activities of daily living:
Alternatively, a person may qualify through the cumulative effect of significant restrictions across multiple basic activities of daily living, even if no single restriction is marked on its own.
The DTC also covers individuals who require life-sustaining therapy. A common example is insulin-dependent diabetics who must devote at least 14 hours per week to managing their condition — time spent on activities such as blood glucose monitoring, insulin adjustments, and dietary management counts toward this threshold.
It is worth noting that the DTC is not limited to visible or physical disabilities. Mental health conditions, cognitive impairments, autism spectrum disorder, and chronic illnesses that restrict daily functioning can all qualify, provided the criteria above are met.
Eligibility for the DTC is not self-assessed. A qualified medical practitioner must certify your impairment by completing CRA Form T2201. The type of practitioner required depends on the nature of the impairment:
Getting the right practitioner to complete Part B of the T2201 is critical. CRA may reject or request additional information if the certifying professional does not match the impairment category, so it is important to plan accordingly before submitting.
The application process centres on CRA Form T2201, the Disability Tax Credit Certificate. Here is how it works:
Step 1 — Download the form: Obtain the current version of Form T2201 from the CRA website. Using an outdated version can delay your application.
Step 2 — Complete Part A: The applicant (or their legal representative) fills in Part A, which covers personal information and the year from which the disability began.
Step 3 — Have your medical practitioner complete Part B: This is the most important section. Your qualified medical practitioner certifies the nature and severity of your impairment, including when it started and whether it is permanent or expected to last at least 12 months. Take the time to discuss your daily functional limitations thoroughly with your practitioner — the detail provided here directly influences CRA's decision.
Step 4 — Submit to CRA: You can mail the completed form to your CRA tax centre or upload it directly through My Account on the CRA website. Digital submission is generally faster.
Step 5 — Await CRA's decision: CRA reviews the application and either approves it or requests additional medical information. If approved, you will receive a letter confirming your eligibility and the years to which it applies. This confirmation letter is important — keep it on file, as it determines which tax years you can claim or adjust.
For the 2025 tax year, the federal Disability Tax Credit amount is $10,138. Because the DTC is calculated at the lowest federal tax rate of 15%, this translates to a federal tax reduction of up to $1,521.
If the person with the disability is under 18 years of age, an additional supplement of $5,500 applies, further reducing the federal tax owing.
It is important to remember that these are federal figures only. Every province and territory in Canada has its own DTC amount, calculated at the applicable provincial tax rate. When you add provincial savings to the federal credit, the combined tax relief is meaningfully higher than the federal credit alone — making the DTC even more valuable than many people realise.
If the person with the disability does not need the full credit to bring their own tax payable to zero, the unused portion can be transferred to a supporting person. A supporting person may be a spouse or common-law partner, or another individual who supports the person with the disability — such as a parent, grandparent, sibling, aunt, or uncle.
To claim a transferred DTC, the supporting person must genuinely be providing support — financial or otherwise — to the person with the disability. The transfer is claimed on Schedule 1 of the supporting person's T1 return. Families where the person with the disability has low or no income frequently benefit from this provision, as the entire credit can flow to a higher-earning family member and generate meaningful tax savings.
One of the most overlooked aspects of the DTC is the ability to claim retroactively. If you were eligible in prior years but never applied — or were approved late — you can file T1 Adjustments for up to 10 years back. CRA will reassess those returns and issue refunds for any tax years where the credit reduces your tax payable.
Consider a straightforward example: if your condition began seven years ago and you are only applying for the DTC today, and CRA approves the certificate from that original start date, you could potentially recover seven years of unused credits through T1 Adjustments. For families who have been supporting a child or spouse with a disability without claiming the DTC, this retroactive opportunity can result in several thousand dollars in refunds.
At Swift Accounting Calgary, we regularly help clients identify missed DTC claims and navigate retroactive adjustments — and it is one of the most impactful tax recovery exercises we assist with. If you suspect you or a family member may have been eligible in prior years, it is worth reviewing your situation with a professional.
The Disability Tax Credit requires some effort to claim — particularly the medical certification step — but for qualifying individuals and families, the financial benefit is substantial. Between the federal and provincial credits, the ability to transfer unused amounts to a supporting person, the retroactive opportunity going back a decade, and the gateway it opens to the RDSP, the DTC is one of the most powerful tax tools in the Canadian system.
If you have questions about whether you or a family member qualifies, need help completing or reviewing Form T2201, or want to explore retroactive claims, the team at Swift Accounting is here to help.
Contact Swift Accounting today to discuss your DTC eligibility and make sure you are not leaving money on the table.
Yes. A parent or legal guardian can apply on behalf of a minor child. Part A of Form T2201 is completed by the applicant or their representative, and if approved, the credit can be claimed by the supporting parent or guardian if the child does not have sufficient income to use it. The under-18 supplement of $5,500 (for 2025) also applies, increasing the total benefit.
Not necessarily. The DTC has a specific legal threshold: the impairment must be severe and prolonged, and it must result in a marked restriction in a basic activity of daily living, or require life-sustaining therapy for a minimum number of hours per week. Conditions such as well-controlled diabetes, mild anxiety, or partial hearing loss may not meet the standard, even though they are genuine medical conditions. A qualified medical practitioner must assess your situation honestly against CRA's criteria.
You can file T1 Adjustments for up to 10 years of prior tax returns. CRA will reassess each year and issue refunds where the DTC reduces your tax owing. To go back to the earliest eligible year, the certificate (Form T2201) must be approved with a start date that covers those years. This is one area where working with an experienced accountant pays off, as the retroactive filing process involves multiple steps and careful documentation.
The RDSP is a long-term, tax-deferred savings plan available exclusively to Canadians who have been approved for the DTC. Contributions grow tax-sheltered inside the plan, and the federal government may add Canada Disability Savings Grants of up to $3,500 per year and Canada Disability Savings Bonds of up to $1,000 per year, depending on family income. Over a lifetime, total federal contributions can reach $90,000. Without an active DTC approval, you cannot open or maintain an RDSP — making DTC certification the essential first step for long-term disability financial planning.
Our Calgary team handles personal tax, corporate returns, GST/HST, payroll, and bookkeeping.
Book a Consultation