10 Canadian Tax Deductions You're Probably Missing in 2026

The CRA doesn't remind you about deductions you're eligible for. It's entirely your responsibility to claim them — or miss them. The good news is that many of these are straightforward to claim once you know they exist. Let's go through each one.

Deductions That Reduce Your Taxable Income

Deductions are subtracted from your income before tax is calculated. At a 40% marginal rate, every $1,000 you deduct puts $400 back in your pocket.

1. RRSP Contributions — The Most Powerful Tool You Have

This one might seem obvious, but it's still widely underused. RRSP contributions reduce your taxable income dollar-for-dollar at your marginal tax rate — the highest rate you pay on your last dollar of income. At a 43% marginal rate, a $10,000 RRSP contribution generates a $4,300 refund. That's not a small amount.

The RRSP contribution deadline for the 2025 tax year is 60 days into 2026 — typically around March 1st. Many Canadians miss this deadline entirely and lose the deduction for that year. If you have unused contribution room from prior years, you can catch up — your available room is on your most recent Notice of Assessment from the CRA. Use an RRSP calculator to see the exact refund you'd receive based on your income.

2. Home Office Expenses — If You Work From Home

If you worked from home at least 50% of the time for a minimum of four consecutive weeks during 2025, you can claim home office expenses. There are two methods to choose from.

The flat rate method lets you claim $2 for each day you worked from home, up to a maximum of $500. No receipts required, no form from your employer — just fill out the simplified form. The detailed method requires a T2200 Declaration of Conditions of Employment from your employer, but allows you to claim actual expenses: a proportionate share of rent or mortgage interest, internet, electricity, and office supplies. This method typically yields a larger deduction but takes more effort to document.

3. Moving Expenses

Did you move for work or to attend full-time post-secondary school in 2025? If your new home is at least 40 kilometres closer to your new workplace or school than your old home was, your moving costs are deductible.

Eligible expenses are broader than most people realise: moving company fees, travel costs (including one night's accommodation), meals during the move, temporary housing while you look for a permanent place, the cost of breaking your old lease, and even costs associated with maintaining your vacant old home while it was up for sale. These deductions are claimed against income earned at your new location — so you can't claim more than you earned there during the year, but unused amounts carry forward.

4. Union and Professional Dues

If your employment requires you to belong to a professional association or union, those membership fees are fully deductible. This includes union dues, professional association fees (engineers, nurses, accountants, lawyers — any regulated profession), and professional malpractice insurance premiums required as a condition of employment.

These amounts are often already summarised on your T4 in Box 44, but many Canadians don't connect the dots between that box and a line on their return. Check your T4, claim the deduction, and recover a portion of what you paid.

Credits That Directly Reduce Your Tax Owing

Unlike deductions, which reduce the income you're taxed on, credits reduce your tax bill directly — dollar for dollar. Non-refundable credits can reduce your tax to zero but not below; refundable credits can result in a payment from the CRA even if you owe no tax.

5. Medical Expenses — Often Underestimated

The medical expense tax credit is one of the most commonly underclaimed in Canada, partly because people don't know what qualifies. The threshold is medical expenses that exceed 3% of your net income (or $2,635 — whichever is lower). Everything above that threshold generates a 15% federal tax credit, plus provincial amounts.

What qualifies goes well beyond prescriptions and dental work: glasses and contact lenses, hearing aids, physiotherapy, fertility treatments, travel costs to access medical care more than 40km away, and even certain renovations to accommodate a disability. You can claim expenses for yourself, your spouse, and your dependent children. Importantly, you can combine expenses from any 12-month period ending in the tax year — so if you had a cluster of expenses spanning two calendar years, you may be able to capture all of them.

6. Charitable Donation Tax Credit

Charitable donations generate a generous federal credit: 15% on the first $200 donated, and 29–33% on amounts above $200. The higher rate kicks in because Parliament wanted to provide additional incentive for larger donations.

If you're a first-time donor (you haven't claimed a charitable donation credit in the last five years), you receive a supplementary 25% "first-time donor super credit" on up to $1,000 of donations — bringing the effective credit rate to 40% on the first $200 and 54% on the next $800. You and your spouse can pool all charitable donations onto one return to maximise the amount claimed at the higher rate. Keep all official donation receipts — the CRA audits this category more than most.

7. Disability Tax Credit — One of the Most Overlooked

The Disability Tax Credit is one of the most valuable credits in the entire Canadian tax system — and one of the least claimed. It's worth approximately $1,500–$2,600 per year federally (plus additional provincial amounts), and it can be transferred to a supporting family member if the person with the disability doesn't need it.

The DTC applies to significant restrictions in daily activities caused by physical or mental impairments. The list of qualifying conditions is broader than most people assume: it includes severe depression and anxiety disorders, Type 1 diabetes requiring sustained therapy, chronic pain conditions, ADHD with significant functional limitations, and many others. The impairment must be prolonged (12 months or more) and must be certified by a qualified medical professional using CRA Form T2201. If you or a family member has a chronic condition and has never applied, it's absolutely worth looking into.

8. Childcare Expenses — Commonly Claimed Wrong

Childcare expenses are deductible — daycare, a registered babysitter, day camps, boarding schools, and certain overnight camps all qualify. The maximum deduction is $8,000 per child under 7 and $5,000 for children aged 7–16.

Here's where many families go wrong: the CRA requires that these expenses be claimed by the lower-income spouse, not the higher earner. It seems counterintuitive because the higher earner would get a larger benefit per dollar — but the rule is clear, and claiming on the wrong return will result in the claim being disallowed. Keep childcare receipts throughout the year; your provider needs to give you their SIN or business number on the receipt.

9. Student Loan Interest

If you're repaying government student loans — Canada Student Loans or provincial equivalents — the interest you pay each year generates a 15% non-refundable federal tax credit. Note that this is a credit on the interest only, not a deduction on the full repayment amount. Also important: this only applies to government-issued student loans, not private bank loans or lines of credit used for school.

The unused portion of this credit can be carried forward for up to five years. So if your income was low in a given year and the credit didn't reduce your tax much, you can apply it in a future year when your tax bill is higher. Keep your annual loan statements to confirm the interest paid each year.

10. First-Time Home Buyers' Tax Credit

If you purchased your first qualifying home in 2025, you're eligible for the First-Time Home Buyers' Tax Credit — a $10,000 non-refundable federal credit that translates directly to $1,500 in federal tax savings. This is claimed on Schedule 1 of your return and takes about two minutes to complete.

The credit can be split between spouses if you both appear on title. It's worth $1,500 regardless of how you split it — so there's no tax advantage to one person claiming the full amount versus splitting it 50/50. If you bought in 2025 and haven't claimed this yet, file an adjustment (T1-ADJ) to recover it.