Which spouse should claim our family’s medical expenses?

Often the lower-income spouse, because the credit only counts expenses above a threshold equal to the lesser of a set amount or a percentage of net income. A lower income means a lower threshold, so more of the expense becomes claimable. Calculate it both ways to be sure.

Can I claim medical expenses for a non-calendar period?

Yes. You can claim eligible medical expenses for any 12-month period ending in the tax year, not just January to December. This lets you group a cluster of expenses into one claim period for a better result.

Who can I claim as a dependant for the caregiver amount?

Beyond a spouse or child, the Canada caregiver amount can apply to an infirm dependant such as a grandchild, parent, grandparent, sibling, aunt, uncle, niece or nephew, where they depend on you because of a physical or mental impairment. You generally need medical proof of the condition.

What do I need to qualify for the disability tax credit?

A severe and prolonged impairment in physical or mental functions, expected to last at least 12 months and present substantially all of the time, certified by a medical practitioner on Form T2201. The CRA then decides eligibility based on the certified effects of the impairment.

Can I claim the disability tax credit for past years?

Often yes. Once the DTC is approved, you can ask the CRA to adjust prior returns. The book notes you can generally go back about 10 years to claim the disability amount and associated medical expenses, which can produce a meaningful refund. Confirm the current limits.

Do I have to send doctor’s letters and receipts with my return?

Generally no — you keep the supporting documentation and provide it only if the CRA requests it. For a caregiver claim, a signed letter from a doctor describing the condition is often sufficient and easier to obtain than a full disability certificate.

Claiming Medical Expenses, Caregiver Amounts and Dependants in Canada

Some of the most valuable credits on a Canadian return are tied to family and health — and they are also among the most frequently missed, because the receipts are scattered and the rules feel complicated. Medical expenses, the various caregiver amounts, the eligible-dependant claim and the disability tax credit can together save a household thousands. This guide, drawn from tax lawyer Dale Barrett’s "Pay WAY Less Tax!", explains how each works and how to make sure the right person claims them.

How does the medical expense claim work?

Medical expenses are claimed as a credit, but only the portion above a threshold counts. The threshold is the lesser of a set dollar amount or a percentage of the claimant’s net income — so the higher your income, the more you must spend before the credit kicks in.

Because of that, the book illustrates that it is usually better for the lower-income spouse to claim the family’s medical expenses, since their income-based threshold is lower and more of the expense becomes claimable. You can also choose the most advantageous 12-month period ending in the tax year, rather than being locked to the calendar year — useful for grouping a run of expenses.

Only expenses above the income-based threshold count toward the credit
Pool the family’s receipts and have the lower-income spouse claim where it helps
Minor children’s expenses can be combined with a parent’s; an adult child’s are claimed separately
You can pick the best 12-month window ending in the year

What caregiver amounts can you claim?

If you support a spouse, common-law partner or dependant with a physical or mental impairment, you may qualify for the Canada caregiver amount. The book notes this can extend beyond the obvious relationships — it may apply when the dependant is an infirm grandchild, parent, grandparent, sibling, aunt, uncle, niece or nephew.

There is also the spouse or common-law partner amount, available where one spouse is financially responsible for a lower-income partner, and the amount for an eligible dependant. To support a caregiver claim, you generally need CRA-acceptable proof of the dependant’s condition — often a signed letter from a doctor, which the book points out can be easier to get than a full disability certificate.

Who can claim the amount for an eligible dependant?

The eligible-dependant amount (sometimes called the "equivalent-to-spouse" amount) is for a taxpayer who supported a dependant and did not claim a spouse or partner amount. It is commonly claimed by single parents for a child, but the dependant can be a parent, grandparent, child, grandchild or sibling who meets the conditions.

A useful detail from the book: children living away from home while attending school still qualify if they ordinarily live with you when not at school. As with most family claims, you keep the supporting documents and only provide them if the CRA asks.

How does the disability tax credit (DTC) work?

The disability tax credit is a non-refundable credit for people with a severe and prolonged impairment in physical or mental functions. "Prolonged" means the impairment has lasted or is expected to last at least 12 months, and the restriction must be present substantially all of the time. A medical practitioner must complete and certify Form T2201.

The DTC is powerful for two reasons. First, the amount can be transferred to a supporting spouse or family member if the person with the disability cannot use it. Second, once approved, you can ask the CRA to adjust prior returns — the book notes you can go back roughly 10 years to claim the disability amount and related medical expenses you missed. Approval can also open the door to other programs, such as the registered disability savings plan.

This is general information, not tax advice. Tax rules and dollar amounts change every year — verify the current CRA rules or consult a tax professional before you file.

Requires a severe and prolonged impairment certified on Form T2201
Can be transferred to a supporting spouse or relative
Can be back-claimed for prior years once approved
May unlock other federal and provincial programs

Frequently asked questions

Which spouse should claim our family’s medical expenses?: Often the lower-income spouse, because the credit only counts expenses above a threshold equal to the lesser of a set amount or a percentage of net income. A lower income means a lower threshold, so more of the expense becomes claimable. Calculate it both ways to be sure.
Can I claim medical expenses for a non-calendar period?: Yes. You can claim eligible medical expenses for any 12-month period ending in the tax year, not just January to December. This lets you group a cluster of expenses into one claim period for a better result.
Who can I claim as a dependant for the caregiver amount?: Beyond a spouse or child, the Canada caregiver amount can apply to an infirm dependant such as a grandchild, parent, grandparent, sibling, aunt, uncle, niece or nephew, where they depend on you because of a physical or mental impairment. You generally need medical proof of the condition.
What do I need to qualify for the disability tax credit?: A severe and prolonged impairment in physical or mental functions, expected to last at least 12 months and present substantially all of the time, certified by a medical practitioner on Form T2201. The CRA then decides eligibility based on the certified effects of the impairment.
Can I claim the disability tax credit for past years?: Often yes. Once the DTC is approved, you can ask the CRA to adjust prior returns. The book notes you can generally go back about 10 years to claim the disability amount and associated medical expenses, which can produce a meaningful refund. Confirm the current limits.
Do I have to send doctor’s letters and receipts with my return?: Generally no — you keep the supporting documentation and provide it only if the CRA requests it. For a caregiver claim, a signed letter from a doctor describing the condition is often sufficient and easier to obtain than a full disability certificate.