10 Most Commonly Missed Tax Deductions in Canada

1. Work-From-Home Expenses

Since 2020, millions of Canadians have worked from home either full-time or on a hybrid schedule. The CRA offers two methods for claiming work-from-home expenses: the flat rate method and the detailed method. Many taxpayers either do not realize they qualify or are unsure which method to use.

Flat rate method: You can claim $2 per day for each day you worked from home, up to a maximum of $500 per year (250 working days). No receipts are required, and you do not need a signed T2200 form from your employer. You qualify if you worked from home more than 50% of the time for at least four consecutive weeks.

Detailed method: If your expenses are higher, you can claim the actual proportion of home expenses related to your workspace. This includes a portion of rent, electricity, heating, internet, and maintenance costs. You will need a signed T2200 or T2200S form from your employer, and you must keep all receipts.

Common mistake: Many people default to the flat rate method without calculating whether the detailed method would yield a larger deduction. If you rent and have a dedicated home office, the detailed method often produces a significantly higher claim.

2. Medical Expenses

The medical expense tax credit is one of the most underused credits in Canada. You can claim eligible medical expenses that exceed the lesser of 3% of your net income or $2,635 (for the 2025 tax year). The CRA accepts a wide range of expenses that many taxpayers do not realize qualify.

What qualifies: Prescription medications, dental work, eyeglasses and contact lenses, laser eye surgery, hearing aids, physiotherapy, psychologist or therapist fees, fertility treatments, travel costs for medical care (if the nearest treatment is more than 40 km away), and even premiums for private health insurance plans.

Who should claim: The CRA allows either spouse to claim the combined family medical expenses. Because of the 3% net income threshold, the lower-income spouse should generally claim them, as this produces a larger credit.

Common mistake: People forget to include expenses paid for dependants, such as children or elderly parents. You can also choose any 12-month period ending in the tax year, which lets you group expenses strategically.

3. Moving Expenses

If you moved at least 40 kilometres closer to a new job, business, or post-secondary school, you can deduct a substantial range of moving expenses from your income. This deduction is claimed on line 21900 and can include costs that many people do not think of.

What qualifies: Transportation and storage costs, travel expenses including meals and accommodation for your family, temporary living expenses near your old or new home (up to 15 days), the cost of cancelling a lease, legal fees and land transfer tax on purchasing a new home, and even utility hook-up and disconnection fees.

Common mistake: People assume they can only deduct moving costs for a new job. You can also claim them when moving to attend post-secondary education full-time, and the deduction can be carried forward to future years if you do not have enough income to use it in the year of the move.

4. Child Care Expenses

Canadian families pay thousands of dollars per year in child care, and the child care expense deduction on line 21400 can significantly reduce taxable income. The deduction is generally claimed by the lower-income spouse and has annual limits based on the child's age.

Limits: Up to $8,000 per child under age 7, $5,000 per child aged 7 to 16, and $11,000 per child with a disability. These amounts apply per child, so a family with two children under 7 could deduct up to $16,000.

What qualifies: Daycare, nannies, babysitters, day camps (but not overnight camps with limits), before-and-after-school programs, and boarding school fees (with limits). The payments must be for care while the parents work, attend school, or conduct research.

Common mistake: Parents forget to claim payments to relatives (such as grandparents) who are not dependants and are over 18. These are legitimate child care expenses if the relative provides a receipt.

5. Charitable Donations

The charitable donation tax credit offers some of the most generous tax savings available to Canadian taxpayers, but many people either forget to claim smaller donations or do not optimize their claims. The federal credit is 15% on the first $200 donated and 29% (or 33% for high-income earners) on amounts above $200, plus a corresponding provincial credit.

Optimization tip: Combine donations with your spouse. Since the credit rate jumps after $200, one spouse should claim all combined donations to maximize the higher rate. You can also carry donations forward up to five years to bunch them into a single year.

Common mistake: People do not realize that gifts of publicly traded securities (stocks, mutual funds) to registered charities are exempt from capital gains tax on the donated shares. This can make donating appreciated stocks much more tax-efficient than donating cash.

6. Tuition and Education Credits

Students and former students frequently miss claiming tuition amounts. If you attended a qualifying post-secondary institution and paid more than $100 in tuition fees, you can claim the tuition tax credit. Unused amounts can be carried forward indefinitely or transferred to a spouse, parent, or grandparent (up to $5,000).

What qualifies: Tuition fees, mandatory ancillary fees, examination fees for professional licensing (such as CPA, bar exams, or medical boards), and fees for occupational skills courses at certified institutions. Fees for courses taken at foreign universities also qualify if the program is at least three consecutive weeks and at the post-secondary level.

Common mistake: People who graduated years ago forget that unused tuition credits carry forward indefinitely. If you did not use them in previous years, they remain available. Check your CRA My Account for your carryforward balance.

7. RRSP Deduction

While many Canadians know about RRSPs, a surprising number either do not maximize their contribution room or forget about the strategic timing of their deduction. Your RRSP contribution room accumulates at 18% of your previous year's earned income, up to the annual maximum, and any unused room carries forward.

Key strategy: You do not have to deduct your RRSP contribution in the same year you make it. If you expect to be in a higher tax bracket next year, you can make the contribution now (to preserve your room and start tax-sheltered growth) but delay claiming the deduction until the following year when it saves you more.

Common mistake:Not contributing enough in the first 60 days of the year. Contributions made in January and February can be deducted on the prior year's return, which can result in an immediate refund. Many people also forget about their unused contribution room, which can add up to tens of thousands of dollars over time.

8. Pension Income Splitting

If you or your spouse receive eligible pension income, you can split up to 50% of it with your spouse for tax purposes. This does not require actually transferring money; it is a paper allocation on your tax returns. The goal is to equalize income between spouses to reduce the overall family tax burden.

What qualifies: For those 65 and older, RRIF withdrawals, annuity payments from RPPs, and life annuity payments from RRSPs all qualify. For those under 65, only certain RPP annuity payments and amounts received due to the death of a spouse qualify.

Common mistake: Couples do not realize how much they can save. If one spouse is in a 40% marginal bracket and the other is in a 20% bracket, splitting $30,000 of pension income could save over $3,000 in taxes. You also need to file a joint election using form T1032.

9. Northern Residents Deductions

If you live in a prescribed northern zone (such as communities in Yukon, Northwest Territories, Nunavut, or northern regions of several provinces), you may be eligible for the northern residents deduction. This includes both a residency amount and a travel deduction.

Residency deduction: You can claim $11.00 per day for living in a prescribed northern zone or $5.50 per day for an intermediate zone. If you maintain a dwelling and no other household member is claiming the deduction, you can claim an additional $11.00 or $5.50 per day respectively.

Travel deduction: You can claim the cost of two vacation trips per year for each household member. The deduction is limited to the cost of the lowest return airfare to the nearest designated city.

Common mistake: People who live in intermediate zones often do not realize they qualify. The CRA publishes a detailed list of prescribed zones, and communities in northern Ontario, Quebec, Manitoba, Saskatchewan, Alberta, and BC are included.

10. Volunteer Firefighter and Search and Rescue Tax Credit

Volunteer firefighters and search and rescue volunteers who perform at least 200 hours of eligible volunteer service during a year can claim a $3,000 non-refundable tax credit (saving about $450 in federal tax). If you perform at least 200 hours in both roles, you can claim each credit separately for a combined $6,000.

Who qualifies: You must have performed at least 200 hours of eligible volunteer services during the year. These hours include responding to calls, attending meetings, and participating in required training. You must also not have been employed as a full-time firefighter or rescue worker by the same organization.

Common mistake: Volunteers do not keep proper logs of their hours. The CRA may ask for certification from the fire chief or organization head confirming your hours. Keep a contemporaneous log throughout the year to support your claim.

How to Check If You Have Missed Deductions

The CRA allows you to amend prior-year returns going back up to 10 years. If you have missed any of the deductions or credits above, you can file a T1 Adjustment Request using CRA My Account (ReFILE) or by mailing a completed T1-ADJ form. You will receive any additional refund owed to you, plus interest.

Reviewing all 400+ potential deductions and credits against your personal situation is time-consuming. That is exactly what MaxMyRefund was built for: upload your completed tax return and we'll identify what you may have missed.