Does Sleep Apnea Qualify for the Disability Tax Credit?

Does sleep apnea qualify for disability tax credit in Canada? On its own, rarely. CPAP therapy does not meet the CRA's life-sustaining therapy test — a 2025 Tax Court decision confirmed it — so approval in 2026 depends on whether the condition, alone or with others, leaves you markedly restricted in a basic activity of daily living.

Sleep apnea is not on any CRA list of qualifying or disqualifying conditions, because no such list exists. The disability tax credit (DTC) is not awarded by diagnosis. It is awarded by effect: what the impairment does to your ability to carry out basic activities of daily living, how much of the time, and for how long. A diagnosis of obstructive sleep apnea — even severe, even with a documented apnea-hypopnea index that alarms your respirologist — is the starting point of the application, not the end of it.

That is why most sleep apnea applications fail. The natural argument — "I need a machine to breathe at night" — points at the DTC's life-sustaining therapy category, and CPAP does not meet that category's rules. The time the device runs while you sleep does not count toward the required 14 hours a week, and in 2025 the Tax Court of Canada said so directly. An application built on CPAP hours alone is an application the CRA will deny.

The applications that succeed are built differently. They document what the apnea, untreated or incompletely treated, does during the day: cognitive impairment severe enough to meet the mental functions criteria, or restrictions that combine with other conditions — heart disease, obesity-related mobility limits, chronic pain, depression — to produce a cumulative effect the CRA recognises. Those are harder cases to certify and they require a practitioner who understands what the form is asking. They are also the only honest route.

The rest of this guide walks through the test, the court decision, the three routes that can work, the application, what the credit is worth in 2026, and what to do instead if the answer is no — because the CPAP machine itself is a medical expense the tax system does recognise, just through a different credit.

The DTC has three doors, and an application has to pass through one of them. Each requires the impairment to be severe and prolonged — meaning it has lasted, or is expected to last, for a continuous period of at least 12 months.

Marked restriction. 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 — which the CRA interprets as at least 90% of the time — even with therapy, medication and appropriate devices. The recognised activities are vision, walking, mental functions necessary for everyday life, dressing, feeding, eliminating, hearing and speaking. The "even with therapy" clause is decisive for sleep apnea: if CPAP restores your daytime function, the restriction is not marked.

Life-sustaining therapy. You need therapy to support a vital function, delivered at least twice a week for an average of at least 14 hours a week, and the time counted has to be time taken away from your normal everyday activities. Insulin therapy for type 1 diabetes, dialysis, and chest physiotherapy for cystic fibrosis are the CRA's own examples.

Cumulative effect of significant restrictions. You have significant — not marked — restrictions in two or more of the basic activities, or in one activity plus vision, and together they are equivalent to a single marked restriction, again all or substantially all of the time.

Notice what the test is not. It is not a measure of how serious the diagnosis sounds, how many medications you take, or how much the condition costs you. Severe sleep apnea with an excellent CPAP response can be medically serious and still fail every door, because the credit measures residual restriction after treatment. A mild case that leaves someone cognitively impaired throughout the day, because treatment does not work for them, can pass. The ADHD and the disability tax credit guide covers the same test from the mental functions side.

On paper, CPAP looks like a strong candidate. A patient who uses the machine seven or eight hours a night, every night, logs more than 50 hours a week of therapy that keeps their airway open while they sleep. The instinct to file under life-sustaining therapy is understandable. It is also where the CRA's rules are most specific.

The CRA counts only time that takes you away from your normal everyday activities. Its own list of what counts includes receiving the therapy at home or at appointments, setting up and maintaining the equipment, adjusting and administering medication, and keeping a required log. Its list of what does not count includes "time a portable or implanted device takes to deliver therapy", travel time, exercise, and recovery time unless medically required.

Under that rule, the hours a CPAP machine runs while you sleep are device-delivery time during a normal activity — sleeping — and they do not count. What is left is the few minutes a day spent fitting the mask, cleaning the tubing and refilling the humidifier, which no one gets to 14 hours a week.

In 2025 the Tax Court of Canada applied exactly that reasoning in Halvorson v. The King. The taxpayer had severe sleep apnea and used CPAP nightly. The judge found that using the device while falling asleep, and while trying to fall back asleep after a disruption, did not require him to take time away from normal everyday activities — falling asleep being a normal everyday activity — and so the 14-hour condition was not met. The credit was denied for the years in question, and the CRA's long-standing administrative position was confirmed by the court.

The practical consequence is blunt: if the only thing your application says is "CPAP, nightly, severe apnea", it will be refused, and the refusal will be correct in law. Time spent building that application is better spent on the routes in the next section — or, if none applies, on the medical expense credit for the equipment itself.

Sleep apnea does produce DTC approvals. They come through the marked-restriction and cumulative-effect doors, and almost always because the apnea is either untreatable for that person or sits alongside other conditions.

Route one: marked restriction in mental functions. Where CPAP is not tolerated, not effective, or the apnea is compounded by another sleep disorder, the daytime result can be profound: an inability to sustain attention, to remember and follow instructions, to make everyday decisions or to manage time and routine without prompting. If a practitioner can certify that those restrictions are present at least 90% of the time despite treatment, and have lasted or will last 12 months, the application meets the mental functions criteria on its own merits. The diagnosis is sleep apnea; the certified impairment is cognitive.

Route two: cumulative effect. Sleep apnea rarely travels alone. Obesity hypoventilation, heart failure, COPD, chronic pain and depression are frequent companions, and each can produce a significant restriction that is not marked by itself — some difficulty walking, some difficulty with mental functions, some difficulty dressing. Where two or more significant restrictions together equal one marked restriction, the cumulative effect door opens. The certifying practitioner has to describe each restriction and their combined effect; a list of diagnoses does not do it.

Route three: another condition carries the claim. Sometimes the honest position is that the apnea is not the qualifying impairment at all — the heart disease that restricts walking, or the stroke that restricts speech, is — and the apnea is context. Applications succeed here when the form describes the qualifying restriction accurately and does not dilute it with the apnea narrative.

What these routes share is that they are certified by a practitioner who has seen the effects, not just the sleep study. A respirologist can document the diagnosis and treatment failure; a family physician, nurse practitioner or psychologist who has observed the daily-living restrictions is often the right certifier for the restriction itself. Getting the paperwork aligned before it is filed is where families spend their effort — the same discipline our tax planning work applies to the return that follows an approval.

Since 2021 the mental functions category has been defined more broadly than it once was, and it is the route most relevant to sleep apnea. The functions the CRA now lists include attention, concentration, memory, judgement, perception of reality, problem-solving, goal-setting, regulation of behaviour and emotions, verbal and non-verbal comprehension, and adaptive functioning — the everyday tasks of personal care, health and safety, and managing routine.

For a sleep apnea patient the relevant evidence is the daytime picture: falling asleep at work or while driving, an inability to hold a train of thought through a task, forgetting appointments and medication, needing another adult to prompt basic routines. The restriction has to be present all or substantially all of the time — not on bad days — and it has to persist despite treatment. A patient who cannot tolerate CPAP and has failed alternatives such as oral appliances or positional therapy is the patient this route was written for.

The form asks the practitioner to describe the effects, not the cause, and to state when the restriction began. Neuropsychological testing, sleep clinic notes documenting treatment failure, and a record of the functional consequences over time all strengthen the file. Where the apnea coexists with depression or ADHD, the mental functions restriction can be certified on their combined effect; the CRA does not require that a single diagnosis produce the whole impairment.

Practitioners are cautious here, correctly. Certifying a marked restriction in mental functions is a statement that the patient cannot manage everyday life independently at least 90% of the time, and it should not be made lightly. Where it is true, though, it is the strongest sleep apnea application there is, and it is the one worth preparing well. Sleep clinics and respiratory practices that see these patients regularly are among the healthcare practices we work with, and the pattern of a well-documented file is consistent across them.

The application is Form T2201, the Disability Tax Credit Certificate. Part A is yours: identity, the person claiming the credit (you, or a supporting family member), and whether you want the CRA to reassess earlier years automatically if approved. Part B is the medical practitioner's: the section for each affected activity, the effects of the impairment, when it began, and whether it has lasted or is expected to last at least 12 months.

In 2026 the fastest path is digital. You complete Part A through CRA My Account and receive a reference number; your practitioner uses that number to complete and submit Part B online, and the application lands with the CRA without a paper form changing hands. Paper remains available, but the CRA has been retiring older versions of the form — download the current one from canada.ca if you file that way. The CRA's service standard is a notice of determination within eight weeks of receiving the completed form; digital applications generally move faster than mailed ones.

Two practical points. First, the practitioner who certifies should be the one who has observed the restriction — for a sleep apnea case routed through mental functions, that may be a psychologist or the family physician rather than the sleep specialist, with the specialist's records attached. Second, answer "yes" to the reassessment question in Part A if the impairment predates this year: it is the difference between one year's credit and up to ten years of refunds arriving without a second application.

The DTC is a non-refundable credit: it reduces tax owing but does not generate a refund beyond the tax you paid, which is why it can be transferred to a supporting spouse or family member when the person with the disability has little income. The amounts for 2026 are set federally and by each province.

Combined, the federal and provincial credits are typically worth something in the range of $1,900 to $3,300 a year in tax depending on the province, and more where the child supplement applies. Because the credit is non-refundable, a person with no tax payable gets no direct value from it — but the unused amount can be transferred to a spouse, common-law partner or supporting relative, and approval itself is the gateway to the refundable benefits in the section after next.

The same approval also lets you claim the disability amount on your TD1 with your employer, so the credit reduces withholding through the year rather than arriving as a refund. Our personal income tax calculator shows the difference on a given income; for the paperwork side, personal tax filing pricing covers a return with a DTC claim and transfer at a fixed fee agreed before the work starts.

The DTC is one of the few credits the CRA will apply backwards. When the notice of determination approves eligibility from a date in the past — the practitioner states in Part B when the restriction began — the CRA can reassess your returns for up to ten previous tax years and refund the tax the credit would have saved in each of them. Ticking "yes" to automatic reassessment in Part A triggers this without a further request.

For a sleep apnea case approved through mental functions with an onset years earlier, that can mean several years of federal and provincial credits arriving as one payment — and, where the person with the disability had no tax payable, the same years' credits transferred to the supporting spouse's returns. Each reassessed year also reopens the door to related claims for that year: attendant care, medical expenses and the disability supports deduction all interact with DTC status.

Two cautions. The retroactive period is measured in tax years, so an approval in 2026 can reach back to 2016 at the earliest, and only for years in which the practitioner certifies the restriction existed. And a retroactive refund is taxable income to nobody — it is your own overpaid tax returned — but it can affect income-tested benefits in the year it lands if it changes what you file. Where the years being reopened were prepared by someone else, an accounting review of each reassessment notice against the original return catches the errors the automatic process does not.

The credit's face value understates what approval is worth, because DTC eligibility is the gateway to programs that pay cash.

Canada Disability Benefit. A monthly federal payment for people aged 18 to 64 who are approved for the DTC and have filed a tax return (and whose spouse has filed, where applicable). For the July 2026 to June 2027 benefit year the maximum is $204.20 a month, $2,448.40 a year.

It reduces by 20 cents for each dollar of adjusted family net income above $23,000 for a single person, and above $32,500 for a couple where both are eligible (10 cents per person). Working income is partly exempt — up to $10,210 for a single person and $14,294 combined for a couple in that benefit year. A one-time supplemental payment of $150 to offset the cost of obtaining the DTC has been announced to begin in the fall of 2026.

Child Disability Benefit. A tax-free monthly supplement to the Canada Child Benefit for a child under 18 who is DTC-eligible — up to $284.25 a month per child for the benefit year that ended June 2026, indexed each July and income-tested alongside the CCB.

Registered Disability Savings Plan. Only a DTC-eligible person can be the beneficiary of an RDSP, which attracts federal grants and bonds on contributions. For a younger person approved on a cumulative-effect or mental functions basis, the RDSP can be the largest financial consequence of the approval over a lifetime.

Approval also opens the disability supports deduction, the eligible dependant and caregiver amounts for a supporting relative, and the home accessibility credit. None of these follow automatically; each is claimed on the return, which is why an approval letter should be followed by a review of the whole household's filings, not just the credit line. For a family in the National Capital Region, that review usually begins with our Ottawa tax accountants; the work is identical anywhere in Canada.

Most sleep apnea patients will not qualify for the DTC, and the tax system does not leave them with nothing. A CPAP machine prescribed by a doctor is an eligible medical expense, and so are the mask, tubing, filters and humidifier chambers that go with it, along with the sleep study if it was not covered, and prescribed oral appliances. These are claimed through the medical expense tax credit on your return.

The credit works on expenses above a threshold. For 2026, eligible medical expenses are counted only above the lesser of 3% of your net income or $2,890, and the federal credit is 14% of the excess, with a provincial credit on top. A household with $60,000 of net income has a threshold of $1,800; a CPAP setup and supplies totalling $3,000 in the year would produce $1,200 of creditable expense, worth about $168 federally plus the provincial portion. Modest — but it stacks with every other medical expense in the household, and the claim can be made by the lower-income spouse to clear the 3% threshold sooner.

Two rules make the claim larger than people expect. Expenses can be pooled for any 12-month period ending in the tax year, so a machine bought in November and supplies bought the following spring can land in the same claim. And a spouse's and dependent children's expenses are combined on one return. Our guide to claiming medical expenses works through the threshold arithmetic and which spouse should make the claim.

A notice of determination denying the DTC is not the end of the road, and it should be read carefully: it states which criteria the CRA found unmet. For a sleep apnea application filed under life-sustaining therapy, the denial will almost always be that the 14-hour condition is not satisfied — which, after 2025, is settled law and not worth contesting.

Where the application was filed under mental functions or cumulative effect and denied, the first step is a request for a second review, sending additional medical information that addresses the stated reason — a fuller description of the daily-living restrictions, the treatment history showing CPAP failure, specialist notes. Many denials are reversed at this stage because the original Part B described the diagnosis rather than the effects.

If the second review upholds the denial, you can file a formal notice of objection within the 90-day window stated on the notice, and if that fails, appeal to the Tax Court of Canada under its informal procedure. Halvorson shows how a court reads these cases: on the words of the legislation and the CRA's published criteria, not on sympathy for the diagnosis. An appeal is worth pursuing only where the restriction genuinely meets the test and the file proves it.

Finally, eligibility is not permanent in either direction. A person denied today whose condition worsens — CPAP fails, a comorbidity develops, cognitive effects deepen — can reapply, and the practitioner can certify a new onset date. Equally, an approval can be time-limited, with the CRA asking for a new form when the period ends. Keep the sleep clinic records and the functional history current; they are the evidence for whichever direction the next application takes.

Sleep apnea qualifies for the disability tax credit when its effects meet the test, and it does not qualify because a machine is involved. CPAP hours are not life-sustaining therapy time — the CRA's criteria exclude them and the Tax Court confirmed it in 2025 — so the only honest applications are the ones that document a marked restriction, most often in mental functions, or a cumulative effect with other conditions, present at least 90% of the time despite treatment.

Those applications are harder to certify and they are the ones that succeed, sometimes with ten years of refunds attached and the door to the Canada Disability Benefit and an RDSP opened behind them.

If that is not your situation, the medical expense credit still recognises the machine, the supplies and the sleep study, and it is claimed on an ordinary return. Either way, the decision to apply, the choice of certifier and the handling of the approval — transfers, reassessments, benefits — are worth getting right once rather than fixing later. We prepare DTC-related returns and retroactive adjustments at fixed fees agreed before the work starts, you pay after the service, and everything is handled remotely across Canada. Book a consultation online, or call +1 (416) 619-0068 with your notice of determination to hand.