Written by Maryam Ajorloo, CPA · Reviewed by Behdad Karimi Dermeni, CPA
Consultants in Canada can write off any reasonable expense that helped earn consulting income. The most common tax write-offs for consultants are home office, software, phone and internet, professional development, memberships, vehicle costs, client travel, 50% of meals, marketing, insurance, subcontractors, and professional fees. Claim them on a T2125, or a T2 if you are incorporated.
Nobody starts a consulting practice because they love categorizing expenses. You started it because you are good at the work, and somewhere between the first client and the fourth, a folder quietly filled up with receipts and good intentions. Good news: a lot of what is in that folder lowers your tax bill.
The catch is that consultants get a slightly different list than everyone else, and one rule in the Income Tax Act can quietly cancel almost all of it. This guide covers both.
Getting your expenses in front of you is the hard part, and it is the part software should be doing. Start free for 30 days and let your books sort themselves while you read the rest of this.
The one rule behind every consultant write-off
Being self-employed lets you claim business expenses to reduce your taxable income. The rule of thumb is that if the expense was reasonable and helped you generate business income, you can likely write it off.
"Reasonable" is doing a lot of work in that sentence. The Canada Revenue Agency (CRA) is not looking for the cheapest possible version of every purchase, but it does expect a straight line between the expense and the work. A project management subscription clears that bar easily. A four-day resort stay with one 20-minute client call does not.
Three things follow from the rule, and they explain most of what comes next:
Mixed-use expenses get split. If you use something for business and personal life, you claim only the business portion. Your phone, your car, and your home fall into this bucket.
Big purchases get spread out. A laptop is not written off all at once. It is a capital cost claimed over several years through Capital Cost Allowance.
You need proof, not just a number. A credit card statement shows that money moved. It does not show what you bought or why, and on its own it is thin support for a claim.
12 tax write-offs for consultants in Canada
Here are the consultant business expenses that come up most, in rough order of how much they tend to be worth.
1. Home office expenses
If part of your home is your principal place of business, or you use a space only for business and regularly meet clients there, it falls under business-use-of-home expenses. You deduct a portion of heat, electricity, home insurance, maintenance, property taxes, and mortgage interest, based on the share of your home the workspace takes up.
Two limits matter. The claim cannot create or increase a business loss, and anything you cannot use this year carries forward to a future year. Most consultants also skip claiming Capital Cost Allowance on the house itself, because it can complicate the principal residence exemption when you sell.
2. Software, subscriptions, and your tech stack
Every tool that keeps the practice running is deductible: project management software, a CRM, video conferencing, cloud storage, design tools, and your accounting software. If a subscription serves both business and personal use, claim the business share.
Your phone and internet belong here too. Very few consultants use either exclusively for work, so pick a defensible percentage and apply it consistently rather than claiming the whole bill.
3. Computers, equipment, and office furniture
Laptops, monitors, a second screen, a desk, a chair, and your camera and microphone are capital purchases rather than everyday expenses. You claim them through Capital Cost Allowance (CCA), which spreads the deduction across several years at a set rate per class. Computer hardware and systems software sit in one class, furniture and general equipment in another, and in the year you buy something you can usually claim only part of the normal amount.
Smaller items you consume and replace, such as cables, paper, and printer ink, are ordinary supplies you deduct in full the year you buy them.
4. Professional development and certifications
Courses, seminars, workshops, and conferences that maintain or improve the skills you already sell are deductible in the year you take them. Project management training, a leadership program, or a technical certification in your existing field all qualify.
There is a line here worth knowing. Training that gives you a lasting new qualification, rather than sharpening what you already do, is treated as a capital cost instead of a current expense. If a program is going to change what you are licensed or credentialed to do, ask your accountant before you claim the whole thing.
5. Professional memberships and dues
Fees for professional memberships are fully deductible, including dues paid to organizations such as the Canadian Association of Management Consultants, an industry association, or the professional body that governs your designation.
One exception catches people out: dues for a club whose main purpose is dining, recreation, or sporting facilities are specifically not deductible, no matter how many clients you meet on the golf course.
6. Vehicle expenses
For consultants driving to client sites, vehicle expenses add up fast. The deductible costs include:
Fuel and oil
Repairs and maintenance
Insurance
Licence and registration fees
Interest on a vehicle loan, up to an annual limit
Lease payments, up to an annual limit
Capital Cost Allowance if you own the vehicle, up to the passenger vehicle cap
You claim the business share, and the business share comes from a logbook. The CRA expects the date, the destination, the purpose, and the distance for each business trip. Doing that by hand is tedious enough that most people stop by March, so a mileage app such as MileIQ is worth the setup.
One thing that surprises new consultants: driving from home to an office you keep is commuting, not business travel. Driving from your home office to a client is business travel.
7. Travel to client engagements
When the work happens somewhere else, the trip is deductible. That covers airfare, train and bus fare, hotels, baggage fees, ground transport, and parking at the client site. Meals while travelling on business follow the 50% rule below.
Keep the engagement attached to the expense. A hotel folio proves you stayed somewhere. The calendar invite, the statement of work, or the invoice you sent afterward proves why.
8. Meals and entertainment
Taking a client to lunch is genuinely useful for winning work, and the CRA allows a partial deduction of up to 50% for meals and entertainment. The other half is on you, which is roughly the government's way of saying it knows you also enjoyed the meal.
Two useful exceptions. If you bill a client for meals and identify the cost separately on the invoice, the limit falls on them rather than you. And a small number of events per year staged for all your employees are fully deductible, which matters once you have a team.
Write the purpose and the client name on the receipt while you still remember them.
9. Marketing, website, and business development
Digital and traditional marketing both count: your website and hosting, online advertising, SEO and content help, printed materials, business cards, sponsorship of an industry event, and the design work behind all of it. For most consultants this is one of the easiest categories to under-claim, because the spending is scattered across small monthly charges.
10. Professional liability and business insurance
Commercial general liability, professional liability or errors and omissions coverage, and cyber liability are all deductible business expenses, and many client contracts require you to carry them anyway.
Life insurance premiums are a different animal and are generally not deductible, with a narrow exception when a lender requires the policy as collateral.
11. Subcontractors and associate consultants
When you bring in an associate, a designer, or a specialist to deliver part of an engagement, what you pay them is a deductible business expense. Keep their invoice, their business number, and the GST/HST they charged you, since that tax is recoverable if you are registered.
Be clear in the paperwork that you are hiring a contractor rather than an employee. If the working relationship looks like employment, the CRA can reassess it that way, along with the payroll obligations that come with it.
12. Accounting, legal, and bank fees
Fees paid to accountants, bookkeepers, and lawyers for business work are deductible, including bookkeeping, tax preparation, and help drafting or reviewing a client contract. Bank fees, monthly account charges, and payment processing fees on client payments belong here too.
Legal fees to buy a capital asset are the exception. Those get added to the cost of the asset instead of deducted right away.
What consultants cannot write off
The list of things that do not qualify is shorter, and it is where most reassessments start:
Your own time. Unbilled hours were never income, so there is nothing to deduct.
Business clothing. Suits, dry cleaning, and a good haircut are personal, even when the client is the only reason you own them. The CRA has never once accepted "but I only wear it to meetings."
Commuting between home and a regular workplace you keep.
The personal share of any mixed-use expense, including the family half of your phone plan.
Club dues for dining, recreation, or sporting facilities.
Fines and penalties, including interest and penalties charged by the CRA.
The principal portion of a loan payment. Only the interest is deductible.
Home office costs beyond your income, which carry forward rather than creating a loss.
This is exactly the sort of sorting an AI Bookkeeper is built to do without you thinking about it. See how it works.
The write-off trap that only hits consultants
Here is the rule most consultant guides skip, and the one with real money attached.
If you incorporated and bill most of your time to a single client, the CRA can classify your corporation as a personal services business, sometimes called an incorporated employee. The test is straightforward: you own at least 10% of the shares, and if the corporation did not exist, you would reasonably look like an employee of that client. There is a size exception, so a corporation with more than five full-time employees throughout the year is not caught.
The consequences are the reason to care. A personal services business does not get the small business deduction and does not get the general rate reduction, and it pays an extra 5% federal tax on top, which lands the federal rate at 33%. Then the part that stings: almost every deduction in this article is denied. A personal services business can essentially only deduct the salary and benefits it pays the incorporated employee, the cost of selling or negotiating contracts, and legal fees spent collecting what it is owed.
So the home office, the vehicle, the conference, the software stack, all of it comes off the table at the exact moment the tax rate goes up.
What keeps you on the right side of it is the shape of the actual relationship, not the wording of the contract. Multiple clients, control over how and when you work, your own tools and workspace, the ability to subcontract, and real financial risk all point toward genuine independence. The CRA publishes a guide for IT consultants on employee versus self-employed status that walks through the factors, and they apply well beyond IT.
If you are weighing whether to incorporate at all, we covered the income math in at what income level you should incorporate and the structural trade-offs in corporation versus self-employed. If one client makes up nearly all your revenue, raise this specific rule with your accountant before you file.
Do consultants have to charge GST/HST?
Once your worldwide taxable revenue passes $30,000 in a single calendar quarter or across four consecutive calendar quarters, you stop being a small supplier and have to register. Note that the test is revenue, not profit, and the threshold has not moved since 1991.
What you charge depends on where your client is: HST in Ontario, New Brunswick, Nova Scotia, Newfoundland and Labrador, and Prince Edward Island; GST plus PST in British Columbia, Saskatchewan, and Manitoba; GST plus QST in Quebec; and GST alone in Alberta and the territories.
Registering is not purely a cost. Once you are registered you can claim input tax credits on the sales tax you paid on business expenses, including most of the categories above. Our guide to registering for GST/HST walks through the signup, and the GST/HST calculator handles the arithmetic on an invoice.
Where consultants claim these write-offs
Which form you use comes down to whether you incorporated:
Self-employed and not incorporated: everything goes on form T2125, Statement of Business or Professional Activities, filed with your personal T1 return. Our T2125 guide walks through it line by line.
Incorporated: the expenses go on the corporation's T2 return, and you pay yourself separately through salary or dividends.
On timing: if you are self-employed, your T1 filing deadline moves to June 15, but any balance owing is still due April 30. A corporation files its T2 within six months of its fiscal year-end.
Consulting under a different label? The categories overlap heavily with our guides to tax write-offs for freelancers in Canada and tax write-offs for real estate agents in Canada, and the general rules live in our pillar guide to tax write-offs for small business in Canada.
How to keep your consultant write-offs audit-proof
Claiming a deduction and being able to support it are two different jobs. Five habits cover the second one.
Run every business dollar through a business account. One account and one card for the practice means your bank feed is already most of your bookkeeping. Untangling a personal chequing account in April is the slowest possible version of this work.
Capture the receipt at the moment of purchase. A credit card statement shows an amount and a merchant, not what you bought or why. Photograph or forward the receipt right away with Smart Shoebox, your receipt inbox, so it is matched to the transaction instead of living in your camera roll.
Note the business reason while you remember it. Client name on the lunch receipt, engagement name on the flight, project on the software charge. Ten seconds now, versus reconstructing a year of context from a spreadsheet later.
Track your business-use percentages as you go. Mileage log for the car, square footage for the home office, a defensible split for phone and internet. These are the numbers people invent under pressure, and invented numbers are the ones that fall apart.
Keep your records for six years. The CRA generally expects supporting documents for six years from the end of the tax year they relate to. Digital copies are fine, which is the entire argument for not keeping a physical folder.
Do these five and your books stop being a January project. 3,000+ entrepreneurs run on ReInvestWealth for exactly this reason, and it holds a 4.8-star rating on Capterra.
Frequently asked questions
Can I write off my home office if I also work at client sites?
Yes, as long as the home workspace is your principal place of business. For most consultants it is, because that is where you do proposals, admin, and the work between engagements, even when delivery happens on site. Time spent at a client's office does not disqualify the claim. What would disqualify it is keeping a separate office of your own that serves as your main workplace.
Does incorporating change what a consultant can write off?
Usually not much, since a corporation deducts the same reasonable business expenses. The exception is significant: if your corporation is classified as a personal services business, the deductions are cut back to salary and benefits paid to you, contract negotiation costs, and legal fees to collect receivables. That risk rises sharply when nearly all your revenue comes from one client.
Are fees I pay to subcontractors or associate consultants deductible?
Yes. Payments to subcontractors delivering part of an engagement are ordinary business expenses. Keep their invoice, their business number, and any GST/HST charged, which you can recover as an input tax credit if you are registered. Make sure the relationship is genuinely a contractor arrangement, because the CRA can reassess it as employment if it does not behave like one.
Can I write off a certification course that leads to a new designation?
Not always in the year you pay for it. Courses that maintain or improve the skills you already use are current expenses and deductible right away. Training that gives you a lasting new qualification is treated as a capital cost instead, so the deduction is spread out. If a program changes what you are credentialed to do, confirm the treatment with your accountant.
Can I write off a client who never paid my invoice?
Only if you already reported that revenue. Once an amount has been included in your income and you have genuinely tried and failed to collect it, you can claim it as a bad debt. You cannot deduct unbilled time, because it was never counted as income in the first place. If you were registered for GST/HST on the invoice, you may also be able to recover the sales tax you already remitted.
Keep more of what you bill
The write-offs are not the hard part. Remembering them eleven months later is. Connect your bank, forward your receipts, and let the categorizing happen in the background so the deductions are already sitting there at filing time. Start free for 30 days, or see how it fits a consulting practice on our accounting software for consultants page.
A note from our CPAs: This guide is educational and covers the general rules for Canadian consultants. Tax situations vary, and the personal services business rules in particular turn on the facts of your specific client relationships, so talk to your accountant about your own circumstances. (If they use ReInvestWealth, they will already have clean books to work from.)
Written by Maryam Ajorloo, CPA
Maryam Ajorloo is the co-founder of ReInvestWealth and a CPA who specializes in small business tax, sales tax, and everyday bookkeeping. She helps entrepreneurs keep clean, audit-ready books and make sense of write-offs, filing deadlines, and the numbers behind their business. Read more · Connect on LinkedIn
Reviewed by Behdad Karimi Dermeni, CPA
Co-founder of ReInvestWealth and a founding community builder at Stripe. Behdad built ReInvestWealth to give smart, busy entrepreneurs CPA-level accounting without the CPA-level price tag. Read more · Connect on LinkedIn
