Home Office Deduction in Canada: Employees vs Self Employed vs Corporations

If you work from your kitchen table, a spare bedroom, or a proper office in your basement, you have probably wondered the same thing everyone else does: how much of this can I actually write off?

We offer a comprehensive range of Tax Accountant services in Coquitlam and across other regions of British Columbia. 

 

On this page

• Three Situations, Three Completely Different Rules
• If You Are an Employee (T2200 and T777)
• If You Are Self Employed (T2125)
• If You Own a Corporation
• How to Calculate Your Business Use Percentage
• Who Can Claim What: Expense by Expense
• Five Home Office Claims That Get Denied
• Frequently Asked Questions
• Make Sure You Are Claiming Correctly

Three Situations, Three Completely Different Rules

You are	Can you claim?	What you claim on	The big limitation
An employee (T4)	Yes, if your employer signs a T2200	Form T777, line 22900	No mortgage interest, no property tax, no CCA
Self employed	Yes, no permission needed	Form T2125	Cannot create or increase a business loss
Incorporated owner	Yes, but indirectly, through rent or reimbursement	Corporate T2 plus your personal return	Must be documented and reasonable, or CRA calls it a shareholder benefit

Two things worth knowing right away:

• The COVID era $2 per day flat rate method is gone. It ended after the 2022 tax year. Everyone now uses the detailed method, which means real receipts and a real square footage calculation.
• You do not need a dedicated room. A corner of the living room counts. You just have to reduce your claim for the hours it is not being used for work.

 

If You Are an Employee (T2200 and T777)

This is the group with the most rules and the smallest deduction. For a lot of people it is still worth $800 to $1,500 back.

The Two Eligibility Tests, You Only Need to Meet One

CRA gives you two doors. Walk through either one.

1. The 50% test. Your home workspace is where you principally perform your duties, meaning more than 50% of the time, for a period of at least four consecutive weeks in the year. A hybrid schedule of three days home and two days office clears this. Two days home and three days office does not.
2. The client meeting test. You use the space exclusively to earn employment income and you meet clients, customers or patients there on a regular and continuous basis.

One important catch on that second test: CRA means in person. Zoom and Teams calls from your home office do not count as meeting clients for this purpose. If you are a fully remote worker, you are relying on the 50% test, which is fine, because that is the door almost everyone uses.

You also need to have been required to work from home. A written or verbal agreement with your employer is enough. It does not have to be in your original employment contract.

 

Getting Your Employer to Sign a T2200

The T2200, Declaration of Conditions of Employment, is the form your employer signs confirming your work arrangement. Without it you cannot claim anything. It is the single most common reason a claim falls apart.

Good news: the form got noticeably easier in 2024. Employers no longer have to state what percentage of your duties were performed at home. They just confirm you worked from home more than 50% of the time for at least four consecutive weeks. And if home office expenses are the only thing you are claiming, there is a checkbox at the top that lets your employer complete just Part A and one question in Part B. It is a two minute job now, which is a helpful thing to mention when you ask HR.

Two more notes:

• Do not mail it in. You keep the signed T2200 in your files. CRA only wants it if they review you, and they do review these.
• The T2200S, the short pandemic version, no longer exists. Only the regular T2200 is valid.

 

What Employees Can Claim, and the Big Exclusions

This is where people get tripped up. Employees have a much shorter list than the self employed.

You can claim your business use share of:

• Rent
• Electricity, heat, water, and the utilities portion of condo fees
• Home internet access fees
• Minor repairs and maintenance to the workspace
• Cleaning supplies for the space

 

You cannot claim, no matter how much you would like to:

• Mortgage interest
• Mortgage principal payments
• Property taxes (see the commission note below)
• Home insurance (see the commission note below)
• Capital cost allowance, meaning depreciation on the house
• Furniture, desks, chairs, monitors, laptops
• Home internet connection or installation fees
• Renovations, wall decor, or anything capital

Commission employees are the exception. If part of your pay is commission based on sales, you can also claim home insurance, property taxes, and lease costs for a computer, cell phone or fax machine, capped at your commission income for the year.

One more ceiling applies to everyone: your home office claim cannot exceed your employment income from that employer. Anything left over carries forward and can be used the following year, as long as you are still with the same employer.

 

If You Are Self Employed (T2125)

Sole proprietors and partners get a much better deal. Same two eligibility tests as employees, principal place of business or regular and continuous in person client meetings, but a far longer expense list and nobody’s signature required.

 

Mortgage Interest and Property Tax, Yes, With Conditions

Self employed people can deduct the business use portion of:

• Mortgage interest, but not principal
• Property taxes
• Home insurance
• Heat, hydro, water
• Maintenance and repairs
• Rent, if you rent
• Capital cost allowance on the building

That last one deserves a warning label. Claiming depreciation on your home sounds appealing, but it can jeopardize your principal residence exemption on that portion of the property and trigger recapture when you sell. For the vast majority of home based businesses, the modest annual deduction is not worth the capital gains problem waiting at the other end. Most accountants, including ours, say skip it.

If you are a GST/HST registrant, do not forget you can generally claim input tax credits on the business portion of these costs too. That is money a lot of people leave sitting on the table.

 

Why Home Office Cannot Create a Loss

The rule that surprises new business owners: home office expenses cannot create or increase a business loss. If your business nets $2,000 before home office costs and your calculated home office claim is $5,000, you deduct $2,000 this year and the remaining $3,000 carries forward indefinitely, usable in any future year you still qualify.

So nothing is wasted. It is just deferred.

 

If You Own a Corporation

Here is the thing that catches incorporated owners off guard: your corporation cannot just deduct your house. The house is yours personally. The corporation has to acquire the use of it through a proper transaction, and there are two clean ways to do that.

 

Option A: Charge Your Corporation Rent

You invoice the company a reasonable, fair market rent for the space. The corporation deducts it. You report it as rental income on Form T776, and then deduct your proportional share of mortgage interest, property tax, insurance and utilities against that income.

Done properly, the net personal tax hit is close to zero while the corporation gets a real deduction. Done sloppily, say an arbitrary $1,500 a month for a bedroom, it invites an adjustment and a reassessment.

 

Option B: Reimburse Yourself for a Proportional Share

Simpler and, for most owner managers, the better route. You calculate the business use percentage of your actual household costs, submit it to the company like any other expense report, and the corporation reimburses you.

Because you are being reimbursed for costs incurred on the corporation’s behalf, it is not a taxable benefit to you, and the corporation deducts it. Keep the calculation and the underlying bills. That paper trail is the defence.

The corporation can also directly pay for the genuinely business things: your business internet, your work cell plan, the desk, the monitor, the office chair. Those are corporate assets and straightforward deductions.

 

The Capital Gains Trap on Your Principal Residence

Whichever option you choose, protect the principal residence exemption. CRA generally accepts that using part of your home for business will not cost you the exemption on that portion as long as:

• The business use is ancillary to the main use as your home,
• You have made no structural changes to accommodate it, and
• No CCA has been claimed on the property.

Break any of those three, by building a separate entrance, converting the garage, or starting to depreciate, and a slice of your home’s growth becomes taxable. In Metro Vancouver, where a decade of appreciation on a slice of your house can be six figures, that is not a theoretical risk. And never put your personal residence inside a corporation.

Not sure which structure fits you? This is exactly the kind of decision where an hour with an accountant pays for itself several times over. At Maxpro Financials we run the numbers on rent versus reimbursement for owner managers across Coquitlam, Port Moody, Vancouver and Calgary, and we will tell you plainly if the difference is too small to bother with. The first consultation is free.

 

How to Calculate Your Business Use Percentage

The formula CRA expects:

Deduction = eligible expenses × (workspace area ÷ total finished area) × (hours used for work ÷ total hours available)

That second fraction only applies to shared spaces. Some guidance:

• A dedicated room used only for work: skip the hours adjustment. Area percentage only.
• A dining table or a corner of the living room: apply the hours adjustment. A 40 hour work week is 40 ÷ 168, or 8% of the week.
• Measure finished living area. Unfinished basements and garages generally stay out of the denominator.
• CRA accepts number of rooms as an alternative basis, but square footage is easier to defend.

 

Worked Example: A 1,100 Square Foot Condo With a 120 Square Foot Office

Business use percentage: 120 ÷ 1,100 = 10.9%

Annual cost	Amount	At 10.9%	Employee (salaried)	Self employed
Rent	$28,800	$3,139	Yes, $3,139	Yes, $3,139
Hydro and heat	$1,200	$131	Yes, $131	Yes, $131
Home internet access	$960	$105	Yes, $105	Yes, $105
Cleaning and minor repairs	$400	$44	Yes, $44	Yes, $44
Total for a renter			$3,419	$3,419

Now the same condo, owned instead of rented, with a mortgage:

Annual cost	Amount	At 10.9%	Employee (salaried)	Self employed
Mortgage interest	$18,000	$1,962	No	Yes, $1,962
Property tax	$2,800	$305	No, unless commission	Yes, $305
Home insurance	$900	$98	No, unless commission	Yes, $98
Hydro, heat, internet, repairs	$2,560	$279	Yes, $279	Yes, $279
Total for an owner			$279	$2,644

That gap is the whole story. A salaried employee who owns their home often gets a disappointingly small deduction, while a renter in the same job does quite well. At a 30% marginal rate the renting employee saves roughly $1,026. The self employed owner saves about $793 on the same property, plus whatever else their business claims.

 

Who Can Claim What: Expense by Expense

Expense	Salaried employee	Commission employee	Self employed	Corporation (reimbursement)
Rent	Yes	Yes	Yes	Yes
Electricity, heat, water	Yes	Yes	Yes	Yes
Home internet access fees	Yes	Yes	Yes	Yes
Maintenance and minor repairs	Yes	Yes	Yes	Yes
Home insurance	No	Yes	Yes	Yes
Property taxes	No	Yes	Yes	Yes
Mortgage interest	No	No	Yes	Yes
Mortgage principal	No	No	No	No
CCA on the building	No	No	Allowed but not advised	Not advised
Office furniture and equipment	No	No	Yes, as CCA	Yes, as a corporate asset
Cell phone lease	No	Yes	Yes	Yes
Renovations to the space	No	No	Capital, not an expense	Capital

 

Five Home Office Claims That Get Denied

1. No signed T2200. The most common failure by a wide margin. Ask before year end, not in April.
2. Claiming 100% of the internet bill. Only the business use share of access fees, and connection or installation costs never qualify.
3. Salaried employees claiming mortgage interest or property tax. It is a hard no, and it is an easy flag for CRA to spot.
4. Round numbers with no measurements. “About 20% of my house” does not survive a review. Measure it and write it down.
5. No hours adjustment on a shared space. If the office is also the dining room, CRA expects the time based reduction, and will apply it for you if you do not.

 

Frequently Asked Questions

Can I claim a home office if I also have a desk at my employer’s office?

Yes. Having an office available to you does not disqualify you. What matters is whether you worked from home more than 50% of the time for at least four consecutive weeks.

 

Can two people in the same household both claim?

Yes, if you both qualify. Either split the shared space between you, or each claim your own separate workspace. Just do not both claim 100% of the same room or the same hydro bill.

 

Can I claim rent as a home office expense?

Employees, self employed people and commission employees can all claim the business use portion of rent. Renters generally end up with the largest employee claim, since rent is a big number and mortgage interest is off limits.

 

Can I claim my internet and cell phone?

Internet access fees, yes, at your business use percentage, for all three groups. Cell phone: salaried employees cannot claim the lease, but commission employees and the self employed can. Long distance calls that are clearly business related are claimable by everyone.

 

Can my corporation pay me rent for a home office?

Yes, at a reasonable fair market rate. You report it as rental income and offset it with the proportional share of your home costs. For most owner managers a straight reimbursement is simpler and gets to nearly the same place.

 

Can I claim mortgage interest for a home office?

Not as an employee. Self employed individuals can, and an incorporated owner can effectively access it through rent or reimbursement. Mortgage principal is never deductible for anyone.

 

How much of my utilities can I claim?

Your business use percentage: square footage of the workspace divided by total finished area, then reduced for hours if it is a shared space.

 

What records will CRA ask for if I am reviewed?

The signed T2200 for employees, your square footage measurements and how you calculated the percentage, and the underlying bills: hydro, internet, rent receipts or lease, repair invoices. Keep everything for six years from the end of the tax year.

 

Does buying a desk or a laptop count?

Not for salaried employees. Office furniture and equipment are specifically excluded. Self employed people claim them as capital cost allowance, and a corporation simply buys them as company assets.

 

Do I have to have a separate room?

No. A shared space is fine. You just apply the hours of use reduction on top of the area calculation.

 

Make Sure You Are Claiming Correctly

The home office deduction is small enough that people rush it, and complicated enough that rushing it costs money, either in deductions left unclaimed or in a reassessment two years later.

If you are an employee, get the T2200 signed before you need it. If you are self employed, watch the loss restriction and stay away from CCA. If you are incorporated, decide between rent and reimbursement deliberately and document it once, properly.

Maxpro Financials is a CPA firm serving Coquitlam, Port Moody, Vancouver, Burnaby, Calgary and beyond. We prepare T1 personal returns and T2 corporate returns, and we handle CRA reviews on behalf of our clients, including the home office claims that trigger them.

This article is general information current as of 2026 and is not tax advice for your specific situation. Tax rules change and individual circumstances vary, so please speak with a CPA before filing.