What does critical illness insurance cover? It pays a one-time lump sum if you're diagnosed with a condition on your policy's list and the diagnosis meets the policy's definition. Cancer, heart attack and stroke are the core conditions. Comprehensive plans from the three large Canadian insurers we reviewed list 24 to 26 conditions, and many add a smaller payment for early-stage illnesses.
What does critical illness insurance cover? (Quick answer)
Critical illness insurance covers a fixed list of serious conditions written into your policy. Cancer, heart attack and stroke are on all three insurer lists we reviewed. Comprehensive plans add more than 20 others, such as kidney failure, multiple sclerosis and major organ transplant. If your diagnosis meets the policy's definition and you survive the waiting period, the insurer pays a lump sum.
The Canadian Life and Health Insurance Association (CLHIA) describes the benefit as a non-taxable lump sum paid after a diagnosis such as cancer, a heart attack, a stroke, multiple sclerosis or Parkinson's disease.
Counts differ by policy. As of October 2026, the published lists showed:
- Sun Life (Sun Critical Illness Insurance): 26 full-payout illnesses and 8 partial-payout illnesses for adults.
- Manulife (Lifecheque): 24 covered conditions, plus 6 early intervention conditions that pay part of the benefit.
- Canada Life (LifeAdvance): 25 conditions, or 26 if you add the loss of independent existence rider when the policy is issued.
Simpler plans, such as Manulife's Lifecheque Basic, cover fewer.
The core conditions: cancer, heart attack and stroke
These three drive most claims. In Sun Life's published 2025 claims data, cancer was by far the most common reason it paid a critical illness claim, and heart attack and stroke were the next most common named conditions. Their definitions deserve your closest reading.
Cancer. Policies pay the full benefit for life-threatening cancer, meaning a malignant tumour. Sun Life's wording excludes lesions described as benign, pre-malignant, uncertain, borderline or non-invasive from the full benefit. It also excludes carcinoma in situ (Tis) and tumours classified as Ta. Canada Life's wording excludes thin malignant melanomas of 1.0 mm or less, unless they are ulcerated or have spread. Several of these early cancers can qualify for a partial payment instead.
Heart attack. A specialist must make the diagnosis. Sun Life's wording requires a rise and fall of cardiac markers in the blood, plus heart attack symptoms or new changes on an electrocardiogram (ECG). Raised markers after a procedure such as angiography or angioplasty don't count on their own, unless new Q waves appear.
Stroke. The definition calls for a specialist's diagnosis of an acute cerebrovascular event with new neurological deficits. Those deficits must last more than 30 days and be backed by imaging. Transient ischemic attacks (TIAs, often called mini-strokes) are excluded.
Critical illness conditions list in Canada (October 2026)
This table lists the 26 full-payout illnesses in Sun Life's Sun Critical Illness Insurance, the longest of the three lists we reviewed. Use it as a checklist when you compare critical illness insurance covered conditions. The second column is a simplified, plain-language summary, not the legal wording.
| Covered condition (full payout) | What the definition usually requires |
|---|---|
| Acquired brain injury due to external trauma | Brain damage caused by an injury from outside the body. |
| Aortic surgery | Surgery for disease of the aorta, the body's main artery. |
| Aplastic anemia | Chronic bone-marrow failure confirmed by biopsy, needing transfusions and further treatment. |
| Bacterial meningitis | Meningitis caused by bacteria, with new neurological deficits lasting at least 90 days in a row. Viral meningitis is excluded. |
| Benign brain tumour | A non-cancerous tumour in the brain, as the policy defines it. |
| Blindness | Total, permanent loss of sight in both eyes. Corrected vision must be 20/200 or worse, or the field of vision under 20 degrees. |
| Cancer (life-threatening) | A malignant tumour. Carcinoma in situ, non-invasive and some very early cancers are excluded from the full benefit. |
| Coma | No response to outside stimuli for at least 96 hours, with a Glasgow coma score of 4 or less. Medically induced comas are excluded. |
| Coronary artery bypass surgery | Open-heart surgery with bypass grafts for narrowed or blocked coronary arteries. Angioplasty doesn't count. |
| Deafness | Total, permanent hearing loss in both ears, at 90 decibels or more across the 500 to 3,000 hertz speech range. |
| Dementia, including Alzheimer's disease | A diagnosis of dementia, such as Alzheimer's disease, that meets the policy's definition. |
| Heart attack | A specialist's diagnosis backed by a rise and fall in cardiac blood markers, plus symptoms or new ECG changes. |
| Heart valve replacement or repair | Surgery to replace or repair a heart valve. |
| Kidney failure | Chronic, irreversible failure of both kidneys that leads to regular dialysis or a kidney transplant. |
| Loss of independent existence | Being unable to do at least 2 of 6 activities of daily living on your own for at least 90 days, with no reasonable chance of recovery. |
| Loss of limbs | Permanent loss of limbs, as the policy defines it. |
| Loss of speech | Loss of the ability to speak because of injury or disease, lasting at least 180 days. |
| Major organ failure on waiting list | Failure of a major organ that puts you on a transplant waiting list. |
| Major organ transplant | A transplant of a major organ. |
| Motor neuron disease | A diagnosis of a motor neuron disease, such as ALS (amyotrophic lateral sclerosis). |
| Multiple sclerosis | A diagnosis of multiple sclerosis (MS) that meets the policy's definition. |
| Occupational HIV infection | HIV infection acquired through your work, as the policy defines it. |
| Paralysis | Loss of use of limbs, as the policy defines it. You must survive at least 90 days after the event. |
| Parkinson's disease and specified atypical parkinsonian disorders | A diagnosis of Parkinson's disease or a listed related disorder. |
| Severe burns | Serious burns, as the policy defines them. You must survive at least 30 days after the burn. |
| Stroke | A specialist's diagnosis with new neurological deficits lasting more than 30 days, confirmed by imaging. TIAs are excluded. |
List: Sun Life's 26 full-payout illnesses, as published in October 2026. Thresholds come from Sun Life's published policy wording, except loss of independent existence, which follows Canada Life's LifeAdvance wording. Manulife's Lifecheque list of 24 does not include acquired brain injury or loss of independent existence as separate conditions. Your contract's wording always governs.
Partial payment critical illness benefits for early-stage conditions
A partial payment is a smaller benefit for a condition caught early, before it meets the full definition. Early-stage cancer is the main example, such as ductal carcinoma in situ of the breast. The three policies we reviewed differ most here.
| Early-stage condition | Sun Life | Manulife Lifecheque | Canada Life LifeAdvance |
|---|---|---|---|
| Ductal carcinoma in situ of the breast | Yes. | Yes. | Yes. |
| Early prostate cancer (stage A, T1a or T1b) | Yes. | Yes (stage A). | Yes (early prostate cancer). |
| Papillary or follicular thyroid cancer (stage T1) | Yes. | Yes. | Yes (early thyroid cancer). |
| Chronic lymphocytic leukemia (Rai stage 0) | Yes. | Yes. | Yes (early CLL). |
| Early malignant melanoma | Yes (stage 1A). | Yes (stage 1). | Yes (superficial melanoma). |
| Grade 1 neuroendocrine tumours | Yes. | Not listed. | Yes. |
| Gastrointestinal stromal tumour (AJCC stage 1) | Yes. | Not listed. | Not found. |
| Coronary angioplasty | Yes. | Yes. | Not found. |
"Not listed" means the condition is not among Manulife's six early intervention conditions. "Not found" means it was not in the Canada Life list we reviewed; check the contract. Insurer lists as published, October 2026.
The amount and the number of payments differ too:
| Partial benefit design | Sun Life | Manulife Lifecheque | Canada Life LifeAdvance |
|---|---|---|---|
| Name in the policy | Partial payout. | Early intervention benefit. | Illness assist benefit. |
| Amount | 15% of coverage, up to $50,000 per illness. | 25% of coverage, up to $50,000. | 15% of the benefit, up to $50,000. |
| How often it pays | Once per illness, up to 4 partial payments. | Once per person, across all Lifecheque policies. | Up to 4 times, each for a different condition. |
Under Sun Life's design, a partial payment doesn't lower your coverage amount. Under Canada Life's, the payment comes off the main benefit only if tests confirm a related covered condition within 90 days.
CLHIA critical illness benchmark definitions: why the wording matters
The CLHIA publishes a set of critical illness benchmark definitions to ease some of the perceived complexity of critical illness wording. Its glossary says there are 26 of them. A CLHIA working group reviews them periodically to keep up with medical advances, and the most recent review was completed in 2024.
Use of the benchmarks is voluntary. Each insurer decides which definitions go into its contracts. That's why two policies can both list "heart attack" and still pay on different facts. In practice, the wording decides claims at the edges:
- Bypass versus angioplasty. Bypass surgery is a full-payout condition. Angioplasty is not, though some plans pay a partial benefit for it.
- Stroke versus TIA. A stroke with deficits lasting more than 30 days qualifies. A transient ischemic attack doesn't.
- Invasive versus in situ cancer. Carcinoma in situ is excluded from the full cancer benefit.
The CLHIA also released a free consumer guide, A Guide to Critical Illness Insurance, on February 22, 2024. It covers typical conditions, limitations and exclusions.
What isn't covered: exclusions and the moratorium period
A claim can fail if the condition isn't on your list, if the diagnosis doesn't meet the definition, or if an exclusion applies. These are the common exclusions in the policies we reviewed:
- The 90-day cancer moratorium. Canada Life's LifeAdvance pays nothing for cancer, including the early-stage cancers on its illness assist list, diagnosed within 90 days after the policy date, issue date or last reinstatement. The same applies if the signs, symptoms or tests that led to the diagnosis began before or during those 90 days. Sun Life applies a 90-day exclusion to several partial-payout cancers.
- The survival period. You must live a set time after diagnosis. Manulife says the Lifecheque waiting period is 30 days in most cases. Sun Life uses 30 days for heart attack and severe burns, and 90 days for paralysis.
- Pre-existing conditions. Some policies exclude an illness linked to a health problem you had before coverage began. RBC Insurance's pre-existing condition amendment excludes a critical illness diagnosed in the first 24 months if it relates to a condition you had in the 24 months before. After 24 months of continuous coverage, that exclusion no longer applies.
- Self-inflicted injury and drug misuse. Sun Life's Express Critical Illness sample policy excludes illness caused by injuring yourself on purpose, or by taking drugs other than as a licensed medical practitioner prescribed.
- Conditions missing from the list. Depression, anxiety and other mental illnesses don't appear on any of the three lists we reviewed. Dementia, including Alzheimer's disease, does.
How to compare two policies' condition lists
Work through any two policies in this order:
- Count the full-payout conditions, then note which ones the shorter list is missing.
- Read cancer, heart attack and stroke first, since most claims fall under them.
- Compare the partial benefits: which conditions, what percentage, what cap and how many payments.
- Check survival periods and minimum durations.
- Find the moratorium and any pre-existing condition clause.
- Ask about riders now. Canada Life's loss of independent existence rider, for example, can only be added at issue.
- For a child's policy, check the extra childhood illnesses on the list.
Critical illness insurance cost depends on your age, smoking status, health, the benefit amount, the term and how many conditions are covered.
A critical illness policy pays on a diagnosis, not on time off work. If a long recovery would cut your income, read our guide to critical illness vs disability insurance too.
Critical illness insurance in Ontario, BC, Alberta and other provinces
Insurers sell critical illness coverage across the country, but wording can vary by province. Sun Life, for example, publishes a separate Alberta sample of its Express Critical Illness Enhanced policy.
- Ontario, BC and Alberta: see critical illness insurance in Ontario, critical illness insurance in BC and critical illness insurance in Alberta for local guidance and advisors licensed in each province.
- Manitoba and Saskatchewan: see Manitoba and Saskatchewan.
- Quebec (information only): we don't offer advisor service in Quebec yet. The CLHIA notes that under Quebec's Civil Code (article 2404), exclusion clauses and clauses that reduce coverage must be clearly identified under an appropriate heading. Read more on critical illness insurance in Quebec.
Michael's take
As a planner, I read a critical illness policy from the definitions out, not from the count in. Cancer, heart attack and stroke drive most claims, so those three definitions and the partial payments for early-stage cancers matter more to me than whether a list has 24 conditions or 26. A rare condition you'll probably never claim on shouldn't decide which policy you buy.
My rule of thumb is to size the lump sum to the plan, not to the illness. Think about what your household would need to stay on track through months of treatment and recovery: the mortgage, a partner's time off work, and costs your provincial plan doesn't pay. Then go through the exclusions with your advisor before you sign, especially the 90-day window and any pre-existing condition clause. A policy only protects your plan if it pays when you need it.
Next steps
- Get an instant critical illness insurance estimate in about a minute. It's a model-based range, not a quote.
- Compare coverage types on our critical illness insurance page, and look up terms like survival period in the insurance glossary.
- If you work for yourself, the self-employed income protection desk can help you combine critical illness and disability cover.
- Ask a licensed advisor in your province to compare two contracts' definitions and exclusions side by side.
