How Much Critical Illness Coverage Do I Need?

Most people need enough critical illness insurance to cover 12–24 months of essential household expenses, plus a fund for treatment and travel costs, plus a buffer for debt. For the majority of Ontario households that works out to somewhere between $50,000 and $150,000. Buy toward the lower end if you have solid disability coverage and savings; buy more if you are self-employed, the sole earner, or carrying a large mortgage.

Notice that the formula is built on your expenses, not your income. Unlike life insurance, which replaces income for decades, critical illness insurance is meant to carry you through a defined period of recovery. That makes the number smaller and easier to calculate than most people expect.

This guide walks through the formula, works three common examples, shows what people typically buy, and explains how disability insurance changes the answer.

The simple formula for how much critical illness insurance you need

Add three pieces:

1. Living expenses for 12–24 months. List the essentials: mortgage or rent, property tax, utilities, groceries, insurance premiums, car costs, childcare, minimum debt payments. Multiply the monthly total by 12 for a lean estimate or 24 for a comfortable one. Use 24 if you are self-employed, the sole earner, or would want a spouse to stop working as a caregiver.

2. Treatment and travel fund. OHIP covers hospitals and physicians, but it generally does not cover most prescription drugs outside hospital for working-age adults (the Trillium Drug Program helps with very high costs but has a deductible tied to income), paramedical care like physiotherapy and psychology beyond limited situations, home modifications, medical equipment, private nursing, parking and travel to treatment, or out-of-country options. We detail these in what OHIP does not cover. A fund of $10,000–$30,000 is a reasonable planning figure for most people; more if you would want access to treatment outside Canada.

3. Debt buffer. A lump sum you could put against a line of credit, car loan or business debt, or use to cover a mortgage renewal at a bad moment. This is optional. Some people want the mortgage cleared entirely; most are better off keeping payments current and preserving the rest of the payout for flexibility.

Then subtract what you already have: an emergency fund you would be willing to drain, employer sick pay, and, with care, disability insurance (more on that below).

The result is your target. Round it to a sensible amount, since policies are usually sold in $25,000 or $50,000 steps, and the price per dollar improves as the amount rises. For realistic premiums at each amount, see how much critical illness insurance costs in Canada.

Worked example 1: a single professional

These examples are illustrative scenarios based on situations we commonly see; the people and numbers are fictional.

Priya is 34, a salaried engineer in Ottawa, renting, with no dependants. Her essential expenses are about $3,200 a month. She has group disability insurance through work (66% of salary, 90-day waiting period) and about $15,000 in savings.

• 12 months of expenses: $3,200 × 12 = $38,400
• Treatment and travel fund: $15,000
• Debt buffer: none needed
• Less savings she would use: $10,000

Target: roughly $45,000, rounded to $50,000. Her group disability plan would cover much of her income after 90 days, so 12 months rather than 24 is enough. The critical illness payout covers the 90-day waiting period, tops up the 34% of income the disability plan does not replace, and funds any treatment costs. If she later buys a condo or has children, she should revisit the number.

Worked example 2: a family with a mortgage

Marc and Jennifer are 41 and 39, both employed, two children, and a $520,000 mortgage on a home in Orléans. Household essentials run about $6,500 a month. Marc’s employer provides group disability; Jennifer’s does not. They have $20,000 in an emergency fund.

Their concern is not only lost income. If either is diagnosed, the other would want to cut back on work to help. So they plan for 24 months.

• 24 months of expenses: $6,500 × 24 = $156,000
• Treatment and travel fund: $25,000
• Debt buffer (to cover a year of mortgage payments in reserve): $20,000
• Less emergency fund: $20,000

Target: roughly $180,000 across the two of them. They could buy $100,000 on Jennifer (no group disability) and $75,000 on Marc, or $100,000 each if the premium fits. Because the amount is split across two lives, the cost is spread, and a claim on either one keeps the household solvent. They also carry term life on both, which is a separate need; see critical illness vs. life insurance.

Worked example 3: a self-employed business owner

Dave is 47, runs a small HVAC business with three employees, and is the main earner for his family. There is no group disability plan, no sick leave, and his income stops if he cannot work. Household essentials are $7,000 a month, and the business has a $60,000 line of credit that depends on his cash flow. Savings are modest at $25,000.

• 24 months of expenses: $7,000 × 24 = $168,000
• Treatment and travel fund: $25,000
• Debt buffer (line of credit plus a cushion for the business): $60,000
• Less savings: $15,000

Target: roughly $240,000, rounded to $250,000. That is a large policy and it will not be cheap at 47, so we would also discuss a personal disability insurance policy, which can reduce the critical illness amount, and a business overhead expense policy. We cover the options in disability insurance for the self-employed in Ontario. Many owners land at $150,000 of critical illness plus a disability policy rather than $250,000 of critical illness alone.

Typical critical illness coverage amounts

Situation	Common range purchased (indicative)
Single, renting, group disability at work	$25,000–$75,000
Couple or family with mortgage, one or both with group disability	$75,000–$150,000 per person
Sole earner or self-employed, no group coverage	$100,000–$250,000
High earner or business owner with debt and staff	$150,000–$500,000
Modest backstop or child coverage	$25,000–$50,000

These are the amounts we commonly see, not recommendations. Most insurers offer coverage from $25,000 up to $1,000,000 or more, with larger amounts subject to financial underwriting (the insurer will ask about income and existing coverage to make sure the amount is reasonable).

Balancing critical illness against disability insurance

The two products overlap, and the right mix matters more than the amount of either alone.

Disability insurance pays 60–70% of income monthly while you are unable to work, after an elimination period of 30, 60, 90 or 120 days, potentially for years. It is the better tool for a long illness that keeps you off work.

Critical illness insurance pays one lump sum on diagnosis, whether or not you can work, and whether you are off for two months or two years. It is the better tool for the immediate cash crunch: the waiting period, the income gap, treatment costs, and a caregiver’s lost income.

How they interact when sizing:

• Strong personal or group disability coverage (60–70% of income, 90-day wait, benefits to age 65): size critical illness at roughly 12 months of expenses plus treatment fund. The disability plan carries the long tail.
• Weak or no disability coverage: size critical illness at 24 months, or buy both. If you can only afford one and you are self-employed, a disability policy usually protects against the wider range of events, and critical illness is the next layer.
• Group disability that ends if you leave the job, or is taxable because the employer pays: remember the net benefit is smaller than the headline percentage. Lean toward the higher end of the critical illness range.

We go deeper on this in critical illness vs. disability insurance.

Adjust for these factors

• Your spouse’s income. If a partner earns enough to cover essentials, you can size toward 12 months.
• Children. Childcare costs rise during a parent’s illness. Some policies offer a child rider (often $10,000–$25,000 per child) at modest cost.
• Family history. It affects insurability and price, not the amount you need, but it is a reason to buy sooner.
• Age and term. Younger buyers can lock in larger amounts cheaply on a 20-year or to-age-75 term. Older buyers often trade amount for affordability.
• Return of premium. Riders raise the cost; if the budget is fixed, prioritize the coverage amount over the rider.

A quick sanity check

If you want a one-line version: take your monthly essential expenses, multiply by 18, and add $20,000. For a $4,000-a-month household that gives $92,000, so $100,000. For $7,000 a month, $146,000, so $150,000. Then adjust up for self-employment or a sole income, and down for strong disability coverage and savings.

Whatever number you land on, remember what a claim actually looks like: a diagnosis, a 30-day survival period, and a lump sum that has to stretch across recovery. We explain the process in how critical illness insurance claims work. The amount should let you focus on getting better, not on the bank balance.

How Hayes can help

We are a family-run, FSRA-regulated brokerage in Ottawa, and we will run this formula with you using your real numbers, then compare policies from 30+ Canadian insurers at the amount that fits. If you are already well covered, we will tell you that too.

Our advice costs you nothing; the insurer pays us. Compare critical illness quotes from 30+ insurers in about 2 minutes, free and with no obligation, or contact us to talk through your situation first.