Stop Calling Everything a Write Off
A business expense is not a magic coupon for free stuff
If I had a dollar for every time someone said, "It’s fine—I’ll just write it off" I could probably write off a very nice coffee. (Kidding. Mostly.)
Somewhere along the way, "write-off" became shorthand for "I bought it, I own a business, therefore the government will pay for it."; That is not how it works—and believing it can lead to sloppy bookkeeping, unpleasant surprises at tax time, and expensive trouble if the Canada Revenue Agency asks questions.
Let’s retire the phrase write-off for a minute and call things what they really are: business expenses.
A deduction is not a reimbursement
When your business deducts an eligible expense, it reduces the income on which you pay tax. It does not mean the purchase was free, and it does not mean the government paid the bill for you.
For a very simplified example, say you spend $1,000 on a legitimate business expense and your combined tax rate is 30%. That deduction may reduce your tax by about $300. You are still out $700, plus the time you spent buying, using, and tracking the thing.
So no, buying a more expensive item just because "it’s a write-off" is not a tax strategy. It is still spending money.
When an Expense Supports Business Income
CRA’s basic test is beautifully unglamorous: an expense must be incurred to earn business income, and it must be reasonable in the circumstances.
That means there should be a real, supportable connection between what you bought and what your business does. Not a creative explanation you come up with after the fact; a genuine business purpose.
Here are a few examples:
The details matter. Your industry, how the item is used, and the records you keep all matter.
Your business does not make personal spending deductible
This is the part people most want to negotiate with me about.
Having a business does not make your groceries, regular clothing, home renovations, children’s activities, or weekend getaway deductible simply because you thought about work while you were doing them.
It also does not make every purchase that appears in your business bank account a business expense. A personal item paid from the business account is still personal. In a corporation, it may need to be recorded as a shareholder loan, a benefit, compensation, or a dividend—not quietly buried in office supplies.
Good bookkeeping is not about finding the most creative category. It is about recording transactions honestly and correctly.
Mixed use expenses need a reasonable split
Some costs genuinely serve both personal and business purposes. A vehicle, a cell phone, internet, and a workspace at home are common examples.
Those expenses are not automatically all or nothing. The business may deduct the portion that reasonably relates to earning income. That means tracking enough information to support the percentage used.
For example:
Keep a mileage log for business driving.
Track business versus personal cell phone use where appropriate.
Calculate home office costs using a reasonable method based on space and, where relevant, time used.
"I use it for work sometimes" is not documentation. A reasonable, consistent method is.
A Receipt Is Necessary but Not Sufficient
A receipt proves you spent money. It does not, by itself, prove the expense is deductible.
Keep the receipt, of course. But also keep the context: who the client was, the purpose of the meal, what the trip was for, or how you calculated the business use percentage. A quick note in your bookkeeping software or on the receipt can save a lot of head scratching later.
If CRA reviews your records, "my accountant told me it was fine" is not a substitute for support. Your accountant can help you apply the rules, but we cannot create a business purpose that was never there.
Current Expenses and Capital Assets
Another reason write-off is too vague: not every eligible business purchase is deducted in the year you buy it.
Everyday costs such as supplies, rent, advertising, and many professional fees are generally current expenses. Larger purchases that provide a lasting benefit—like computers, equipment, furniture, or certain renovations—may be capital assets. Instead of deducting the full cost immediately, the business normally claims capital cost allowance, or CCA, over time, subject to the applicable rules.
The purchase may still have tax value. It just may not work the way the phrase "write it off" implies.
A better question to ask
Before you buy something and label it a business expense, ask:
What business income does this help me earn or protect?
Is the amount reasonable for my business?
Is any part of it personal?
Do I have a receipt and enough documentation to explain it later?
Is it an everyday expense or an asset that may need to be deducted over time?
If the answer makes you squirm, it probably is not a business expense.
The bottom line
Claim the expenses you are entitled to claim. Do not leave legitimate deductions on the table. But please stop spending money just because someone told you it is a write-off.
A real tax strategy starts with a profitable business, clean records, and decisions that make financial sense before the tax deduction. The deduction is the bonus—not the reason to buy the thing.
If you are unsure whether a purchase belongs in your books, ask before you file. A five minute conversation is much cheaper than untangling a year’s worth of write-offs later. Schedule a call today.
This post is general information, not advice for your specific circumstances. Tax treatment can depend on the facts, your business structure, and current legislation.
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