The Tax Credits and Deductions Most Canadians Miss
Every year, Canadians leave billions of dollars in unclaimed credits and deductions on the table. Not because the rules are hidden, but because people don’t know to look, don’t keep the right records, or assume their tax software catches everything.
It doesn’t.
Here’s a practical playbook of the credits and deductions that are most commonly missed or underused, and how to claim them properly.
Credits vs Deductions: Quick Refresher
Tax deduction: Reduces your taxable income. The tax savings depend on your marginal rate. Example: a $5,000 RRSP deduction at a 30% marginal rate saves $1,500.
Tax credit: Directly reduces the tax you owe, usually calculated at the lowest federal rate (14% in 2026). Example: a $5,000 eligible expense as a non-refundable credit saves $700 in federal tax.
Both matter. But knowing which is which helps you prioritize where to focus.
Commonly Missed Deductions
1. Moving Expenses
If you moved at least 40 km closer to a new job, business, or full-time school in 2025, you can deduct moving costs: travel, temporary housing, lease-breaking fees, utility hookups, and more. Many people don’t claim this because they don’t realize it applies to them. Remember this deduction generally applies against income earned at the new work or school location.
2. Childcare Expenses
Daycare, nanny costs, day camps, and before/after school care are deductible. Current limits vary by child age and disability status and are indexed over time, so confirm the exact tax-year amounts before filing. This deduction must normally be claimed by the lower-income spouse. Often underclaimed when families don’t realize summer camps count.
3. Employment Expenses (T2200)
If your employer requires you to pay for work-related expenses (supplies, phone, car, home office), and you have a signed T2200 form, you can deduct these. The flat-rate COVID method is gone. You need the detailed method with receipts and the employer form. Keep the signed form and records on file in case CRA asks for support.
4. Interest on Student Loans
Interest paid on government student loans (federal or provincial) qualifies for a tax credit. Interest on private student lines of credit generally does not. This is often missed in the years after graduation when loan payments are automated and people forget to check.
5. Carrying Charges and Interest Expenses
If you borrowed money to invest (not including TFSA or RRSP contributions), the interest may be deductible. This includes investment loan interest and fees paid to investment managers. Commonly missed by DIY investors who don’t track borrowing costs.
6. Union and Professional Dues
Dues paid to maintain professional membership or union membership are deductible. Check your T4 slip and any professional association receipts.
Commonly Missed Credits
7. Medical Expenses
This is one of the most underused credits. Eligible expenses go far beyond doctor visits:
- Prescription medications
- Dental work (cleanings, fillings, orthodontics)
- Eyeglasses and contact lenses
- Physiotherapy, chiropractic, and massage therapy (if prescribed)
- Travel costs for medical appointments (if over 40 km)
- Premiums for private health insurance plans
Tip: Claim medical expenses on the return of the lower-income spouse. The threshold is based on income, so a lower income means a lower threshold and a bigger credit.
8. Disability Tax Credit (DTC)
If you or a dependent has a prolonged physical or mental impairment, the DTC provides a significant non-refundable credit. Many eligible Canadians never apply because they assume “disability” means something extreme. In reality, conditions like diabetes, celiac disease, ADHD, and chronic pain can qualify. You need a T2201 form signed by a medical practitioner, and CRA approval is required before the credit is claimable.
9. Canada Caregiver Credit
If you support a spouse, common-law partner, or dependent with a physical or mental impairment, you may qualify for this credit. It’s often missed when people don’t realize a parent, child, or partner qualifies.
10. Tuition and Education Amounts
Students: your tuition amounts generate credits that can be carried forward to future years or transferred to a parent or spouse. If you graduated a few years ago and had unused tuition credits, check whether they’re still available on your CRA account.
11. Home Accessibility Tax Credit
If you’re a senior (65+) or qualify for the DTC, renovations that improve accessibility (grab bars, ramp installations, walk-in bathtubs) qualify for a credit of up to $20,000 in eligible expenses.
12. Climate Action Incentive (Canada Carbon Rebate)
Not technically something you “claim,” but you must file a tax return to receive it. Many low-income Canadians miss out on quarterly payments simply because they don’t file. Filing is free and the rebate is automatic once your return is processed.
13. First-Time Home Buyers’ Tax Credit
If you bought your first home in 2025, you can claim a $10,000 non-refundable credit (worth $1,400 in federal tax savings at the 14% rate). This is a one-time credit that’s easy to miss if your tax software doesn’t prompt for it.
Household Optimization Tips
- Pool medical expenses on the lower-income spouse’s return. Lower income = lower threshold = bigger credit.
- Transfer unused credits. Tuition, disability, and pension amounts can be transferred between spouses or to a parent.
- Split pension income. If one spouse receives eligible pension income, up to 50% can be allocated to the other spouse’s return. This can save thousands if there’s a large income gap.
- Claim charitable donations together. Pool donations on one return to exceed the $200 threshold where the federal credit rate steps up from the base rate (and can go up to 33% for top-bracket income).
- File even if you owe nothing. GST/HST credits, Carbon Rebate, CCB, and other benefits require a filed return.
The Bottom Line
Tax software is a tool, not a strategy. It calculates what you enter, but it can’t remind you about expenses you forgot to track, credits you didn’t know existed, or household-level optimizations you never considered.
Spend 30 minutes reviewing this list before you file. Check your receipts, ask your employer for the right forms, and look at your household as a unit. That small investment of time can easily be worth hundreds or thousands of dollars.
Want a professional to review your return before you submit? Book a free consultation with FinGems and we’ll make sure you’re not leaving money behind.