The Medical Expense Tax Credit: What Qualifies

The medical expense tax credit lets Canadians recover part of the cost of eligible medical expenses through the tax system. It is a non-refundable credit, which means it reduces tax you owe but is not paid out if you owe nothing. Critically, it does not apply to every dollar you spend. Only eligible expenses above a threshold, set as the lesser of a fixed dollar amount or a small percentage of your net income, actually generate the credit.

This guide explains how the threshold works, what generally qualifies, how to decide which spouse should claim, and the timing choices that can make a real difference. It is general information and the specifics change, so confirm the current rules and any particular expense with your accountant.

How the credit is structured

The credit works on the amount by which your eligible expenses exceed a floor. That floor is the lesser of two figures: a set dollar amount that is adjusted each year, or a fixed small percentage of your net income. In practice, higher-income claimants are limited by the dollar amount, while lower-income claimants are limited by the percentage of income.

Once you know your eligible amount above the floor, a federal credit rate and a provincial credit rate are applied to produce the actual tax reduction. Because the credit is non-refundable, it can only reduce tax to zero; it cannot create a refund on its own. This is why the claim is only valuable to a person who has tax payable in the first place.

What generally qualifies

The range of eligible expenses is broad, but it is defined by a specific list rather than by general health relevance. Expenses that commonly qualify include:

• Payments to physicians, dentists, and other recognised medical practitioners.
• Prescription medications and certain prescribed supplements.
• Eyeglasses, contact lenses, hearing aids, and many medical devices.
• Certain attendant care and nursing-home or long-term-care costs.
• Premiums paid to private health and dental plans.
• Reasonable travel and accommodation when necessary care is not available locally.

Equally important is what generally does not qualify: most over-the-counter products not prescribed, purely cosmetic procedures, and general wellness or fitness costs. The Canada Revenue Agency publishes a detailed list that is updated over time, so an expense you assume qualifies should be checked before you rely on it.

The threshold in practice

The threshold is the single most misunderstood feature of this credit. A family can spend a meaningful sum on health care in a year and still receive little or no credit if that sum does not clear the floor. The illustrative example below shows the mechanics; the figures are hypothetical and rounded.

Item	Amount (illustrative)
Total eligible expenses	$5,000
Claimant’s net income	$40,000
Threshold (3% of net income, in this example)	$1,200
Eligible amount above the threshold	$3,800
Credit applied to	$3,800, at the combined credit rate

In this hypothetical, only $3,800 of the $5,000 produces a credit. Had the same expenses been claimed by a spouse with much higher income, the threshold would likely be the fixed dollar cap instead, but the key point is that the first slice of spending is always absorbed by the floor. Your own figures will differ.

Which spouse should claim

Because the floor is tied to net income, the choice of which spouse claims the family’s pooled expenses matters. Medical expenses for you, your spouse or common-law partner, and your dependent children can generally be combined and claimed on a single return.

• Lower-income spouse. A smaller net income usually means a smaller threshold, so more of the spending clears the floor and becomes creditable.
• But they must owe tax. Since the credit is non-refundable, the claiming spouse needs enough tax payable to absorb it. A spouse with very little income and little tax owing may not be able to use the credit fully.

The right answer is not automatic. The sensible approach is to calculate the claim on each spouse’s return and choose the one that produces the larger net benefit, a calculation your accountant or tax software handles readily. This decision sits naturally alongside broader income-splitting strategies for couples.

Timing: choosing your 12-month period

A feature many people miss is that you do not have to use the calendar year. You claim eligible expenses for any 12-month period ending in the tax year. This flexibility lets you group expenses to clear the threshold more effectively.

For example, if you had a large dental or medical cost late in one year and another early in the next, choosing a 12-month window that captures both can push your total well above the floor in a single claim, rather than falling short in two separate years. Each expense can only be claimed once, and only in the period you select, so a little planning pays off. Keeping organised receipts through the year makes this far easier, and it is also prudent record keeping should you ever face a CRA review.

Where this matters most: retirees and care costs

The medical expense credit becomes most valuable later in life, when health and care costs typically rise. Attendant care, long-term-care fees, and ongoing prescription costs can be substantial, and for retirees managing healthcare costs in retirement, the credit is a meaningful offset.

There is also an important interaction with other credits. In some situations, amounts paid for attendant care can be claimed either as a medical expense or in connection with the disability tax credit, but not always both, and the better route depends on the numbers. These interactions are detailed and situation-specific, which is precisely where coordinating your tax planning with an accountant earns its value. Families supporting an older or disabled relative should also review how this fits with tools such as a Henson trust where relevant.

A practical approach

To make the most of the credit without overcomplicating it:

• Keep every medical receipt through the year, including travel records where care was sought at a distance.
• Pool the family’s expenses rather than splitting them across returns.
• Test the claim on the lower-income spouse first, but confirm they have tax to offset.
• Consider the 12-month-period flexibility when a large cost straddles two years.
• Check any unusual expense against the current eligible list before claiming it.

Expenses people often miss

Beyond the obvious doctor and dentist bills, a number of eligible expenses are routinely overlooked, and claiming them can be the difference between clearing the threshold and falling short.

• Travel for care. When necessary treatment is not available in your community and you must travel a reasonable distance, part of the travel and, for longer trips, accommodation costs can qualify. This matters for families in smaller Ontario communities who travel to Ottawa or Toronto for specialist care.
• Private health plan premiums. Premiums you pay to a private health or dental plan generally qualify, including the portion you pay through certain group plans.
• Attendant and care costs. Fees for attendant care, and portions of retirement-home or long-term-care costs, can qualify, though the rules interact with other credits and must be handled carefully.
• Devices and modifications. Hearing aids, mobility aids, and certain home modifications made for medical reasons can qualify.

Because the eligible list is specific and updated over time, an unusual expense should always be confirmed before you rely on it, but knowing these categories exist prompts people to keep the receipts in the first place.

The medical expense credit does not operate in isolation. It interacts with the disability tax credit, the Canada caregiver credit, and, for some families, provincial programs. In certain cases the same underlying cost, such as attendant care, could be claimed in more than one way, but not simultaneously, and the better route depends on the numbers and on your overall return. This is precisely the kind of interaction that rewards coordinating your tax planning with an accountant rather than claiming each credit in isolation, and it fits within broader thinking about how to reduce taxes in Canada.

How Kevin Hayes Financial Services can help

The medical expense tax credit rewards organised records and a deliberate claim strategy, particularly for retirees and families carrying significant care costs. While the credit itself is calculated by your accountant, it fits inside the broader cash-flow and tax picture we help clients manage through our tax planning and retirement planning work.

If rising health or care costs are part of your retirement picture and you want them reflected sensibly in your plan, book a private consultation and we will help you see the full picture.