Every Tax Deduction in Canada: The Complete Guide for Employees, Freelancers & Business Owners

Picture this: tax season arrives, and a friend asks, "So what did you claim?" You freeze. You know someone gets to deduct something — home offices, RRSPs, car expenses — but which ones apply to you? Employees, freelancers, and business owners all live under the same Income Tax Act but play by very different deduction rules. This is the complete map: what each group can claim, what you need to prove it, and the exact numbers for the 2026 tax year.

If you are an employee: fewer deductions than you think

Here is the honest truth: employees get the shortest deduction list in Canada. Most of your paycheque arrives with tax already withheld, and the CRA assumes your employer covers your work costs. But if your employer makes you pay for work expenses out of pocket, there is a door — and its key is Form T2200, the Declaration of Conditions of Employment, signed by your employer. No T2200, no deduction. It is that simple.

With a signed T2200 in hand, you calculate your actual expenses on Form T777 (Statement of Employment Expenses) and claim the total on line 22900 of your return. Eligible expenses include:

• Motor vehicle expenses — fuel, maintenance, insurance, licence and registration, and even capital cost allowance and eligible loan interest on the car. But only for employment-related driving: the CRA treats your daily home-to-work commute as personal, so a logbook of work kilometres is essential.
• Travel expenses — food, lodging, and transportation (plane, train, bus) when your job normally requires you to work away from your employer's place of business, and your contract says you foot the bill.
• Office supplies and office rent — paper, pens, printer ink, and rent for an office you pay for yourself because the job requires it.
• Work-space-in-the-home — if your home is where you principally (more than 50% of the time) do your work, or you use it exclusively and regularly to meet clients. You can deduct a prorated share of rent, electricity, heat, water, internet, and maintenance based on your workspace's square footage. Two things employees cannot claim: mortgage interest and mortgage principal — those are for the self-employed (see below).
• Parking (other than at your employer's place of business), cell phone costs required by your employer, accounting and legal fees related to your employment, and salary you paid an assistant your employer required you to hire.
• Union dues and professional dues — these do not even need the T2200; claim them on line 21200.

One cautionary tale from the headlines: a taxpayer who claimed motor vehicle and work-from-home expenses without meeting the conditions had every dollar denied in a 2026 tax court case. The rules reward the prepared — keep the T2200, keep your receipts, and keep them for six years.

If you are self-employed or a freelancer: the deduction buffet

Now the good news. If you run your own show — freelancer, contractor, sole proprietor — you report business income on Form T2125, and the CRA lets you deduct any reasonable expense incurred to earn that income. The guiding question is always: did this cost help me make money? If yes, and the amount is reasonable, it is generally deductible. The core list:

• Advertising and marketing — ads, website costs, business cards, social media promotion.
• Office supplies and software — anything consumed within the year, from paper to subscriptions.
• Professional fees — your accountant, bookkeeper, and lawyer (yes, paying JCO is deductible!).
• Business insurance — liability, commercial property. Personal life insurance does not count.
• Business-use-of-home — the same square-footage math as employees, but with a bigger menu: self-employed filers can claim a share of mortgage interest, property taxes, and home insurance against business income. The one hard limit: the deduction cannot create or increase a business loss — unused amounts carry forward to future years.
• Vehicle expenses — fuel, insurance, maintenance, repairs, lease payments, and loan interest, all prorated by business-use kilometres from your logbook. Buy the car outright and its cost goes through Capital Cost Allowance (CCA) — depreciation over several years in set classes, not one big deduction. Note: the CRA's per-kilometre rates you may have seen (73¢/km for the first 5,000 km in 2026) apply to employer allowances; self-employed filers use actual expenses with a logbook.
• Meals and entertainment — capped at 50% of the cost. Client dinner for $120? You deduct $60.
• Salaries and subcontractors — what you pay people who work for you (issue T4s for employees; track subcontractor payments).
• Interest and bank charges — business loan interest, merchant fees. Personal credit card interest stays personal.
• Capital assets — computers, furniture, equipment. These are not expensed in full upfront; they are depreciated gradually through CCA classes.

If you are incorporated: salary vs. dividends, and the corporate deduction game

Once you incorporate, the business becomes its own taxpayer — and you become someone the corporation pays. That creates the classic Canadian question: salary or dividends? Salary gives you RRSP room and CPP contributions (and costs the corporation a deduction); dividends skip CPP but generate no RRSP room. There is no universal right answer — it depends on your income level, retirement plans, and whether you need the RRSP room. This is genuinely accountant territory, not DIY territory.

Inside the corporation, the deduction menu looks like the self-employed list — advertising, office costs, professional fees, vehicle, meals at 50%, salaries, interest — but claimed on the corporate return (T2) instead of your personal one. Corporations also get access to the small business deduction on the first chunk of active business income, with the combined federal-provincial rate varying by province (check current rates for your province when you file). Keep the corporation's money and your personal money strictly separate — the CRA loves auditing owners who treat the corporate account like a personal wallet.

Deductions and credits everyone should know

Whatever your work situation, these apply to just about every Canadian taxpayer:

• RRSP contributions — for the 2026 tax year, you can contribute 18% of your 2025 earned income up to $33,810, plus any unused room carried forward. Contributions are deductible, growth is tax-sheltered, and you have until March 1, 2027 to contribute for 2026. A $2,000 lifetime over-contribution buffer exists; beyond it, a 1%-per-month penalty applies.
• FHSA (First Home Savings Account) — first-time buyers can contribute $8,000 per year up to a $40,000 lifetime limit, deduct it like an RRSP, and withdraw it tax-free for a first home with nothing to repay. Up to $8,000 of unused room carries forward.
• Medical expenses — a non-refundable credit (not a deduction) worth 15% federally on eligible expenses above the threshold: the lesser of 3% of your net income or $2,890 for 2026. Prescriptions, dental, physio, glasses — the uninsured portion counts. Pool the family's expenses on the lower-income spouse's return for a bigger credit, and remember you can pick any 12-month period ending in the tax year.
• Charitable donations — a two-tier credit: 14% federal on the first $200, then 29% above $200 (33% for income over roughly $253,414), plus your provincial credit on top — combined, often 40–50% back on larger gifts in Ontario. Claim up to 75% of net income; carry forward unused donations up to 5 years; pool with your spouse.
• Child care expenses, moving expenses (for eligible relocations), tuition credits, and the disability tax credit round out the big ones — each with its own forms and conditions worth a dedicated read.