Written by Maryam Ajorloo, CPA · Reviewed by Behdad Karimi Dermeni, CPA
You did the work, you got paid, and now there is a tax form standing between you and the rest of your life. That form is the T2125, and if you are self-employed in Canada, it is how you tell the Canada Revenue Agency (CRA) what you earned and what it cost you to earn it. The good news: it looks more intimidating than it is. This guide walks the T2125 section by section, in plain language, with one real example so you can see exactly where your numbers go.
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What is the T2125 tax form?
The T2125, Statement of Business or Professional Activities, is the CRA form self-employed Canadians use to report their business or professional income and expenses. You file it as part of your personal T1 return. It calculates your net income (your earnings minus your eligible expenses), and that net figure is what you actually get taxed on. One form, one job: show your work. You can pull the official T2125 form from Canada.ca any time.
It replaced the old T2124 and T2032 forms years ago, so today there is just the one. If you have heard accountants call it the "self-employment form," this is the one they mean.
Who has to file a T2125?
If you earn money working for yourself and you are not incorporated, the T2125 is almost certainly yours to file. That includes:
Freelancers and consultants (design, marketing, IT, writing, coaching)
Gig and platform workers (rideshare, delivery, couriers)
Tradespeople and contractors operating as sole proprietors
Side-hustlers earning income outside a regular job
Partners in an unincorporated partnership
There is no minimum. A few hundred dollars of freelance income still belongs on a T2125. If you run more than one distinct business or profession, you fill out a separate T2125 for each. (Yes, even the side gig you keep telling yourself is "just a hobby.")
If you are incorporated, this is not your form. Corporations report on the T2 instead. Not sure whether incorporating is worth it yet? Our guide on tax write-offs for consultants in Canada is a good companion read for self-employed folks weighing their options.
Business income vs. professional income: the box that trips everyone up
Near the top of the form, the T2125 asks whether you are reporting business income or professional income. This is the single most common point of confusion, so let's settle it before you go any further.
Business income comes from selling goods or services in the ordinary course of business: sales, commissions, and fees. Think a contractor, an online store, a rideshare driver, a marketing consultant.
Professional income comes from a member of a regulated profession: lawyers, doctors, dentists, engineers, accountants. The practical difference is that professionals usually have to account for work-in-progress (services started but not yet finished or billed at year-end), while most businesses do not.
Here is the part that calms everyone down: the tax treatment is identical. You are taxed the same way either way. The distinction only changes which line of Part 3 you enter your income on. If you are a freelancer or consultant who is not part of a regulated profession, you almost certainly have business income. We break this down further in business income vs. professional income: what's the difference.
The one rule that makes the T2125 simple
Before we walk the form, here is the rule of thumb that explains most of it:
> If an expense was reasonable and helped you earn business income, you can likely claim it on your T2125.
That single principle answers most "can I write this off?" questions. The coffee you bought a client to win their business: probably yes. The coffee you drink alone at home every morning: probably not. Keep that test in your head and the expense sections stop feeling like a guessing game.
How to fill out the T2125, part by part
The form moves in a logical order, from "who are you" to "what did you earn" to "what did you spend." Here is the walkthrough.
Part 1, Identification. Your name, Social Insurance Number, the business name (or just your own name if you do not have one), your address, and your Business Number if you have a GST/HST account. Your fiscal year for most sole proprietors is simply the calendar year.
Part 2, Internet business activities. If your business earns income from websites or web pages, you report how many and their addresses here. Most service freelancers can move right past this.
Part 3, Income. Enter your gross sales, commissions, or fees on line 8000. This is your total revenue before a single expense comes off. Business income uses Part 3A; professional income uses Part 3B (the one with work-in-progress).
Part 4, Expenses. The big one. You list your eligible business expenses by category (advertising, meals, office, vehicle, and more), and subtotal them. Your gross income minus these expenses gives your net income before adjustments.
Part 5, Your net income (loss). The form nets everything out, applies a few adjustments, and lands on the number that flows to your T1. That figure is what you are taxed on.
There are further parts for partnership details, other amounts, and calculations like the capital cost allowance and business-use-of-home, which we cover next. For the official line-by-line, the CRA's Completing Form T2125 guide is the source of truth.
The expense categories that matter most
You do not need to use every line in Part 4. Most service businesses lean on a handful:
Advertising and promotion. Your website, ads, business cards, that social media campaign that may or may not have worked.
Meals and entertainment. Here is the catch most people miss: meals and entertainment are generally only 50% deductible. Spend $200 taking a client to lunch, claim $100. The CRA assumes you would have eaten regardless, and honestly, fair.
Motor vehicle expenses. If you drive for work, you can claim the business-use portion of your fuel, insurance, maintenance, and more, based on the percentage of kilometres driven for business. A logbook is your best friend here.
Office expenses and supplies. Software subscriptions, stationery, the small stuff that quietly adds up.
Professional fees. Your accountant, your lawyer, your bookkeeping tools.
Business-use-of-home. Covered in its own section below, because it has a rule worth knowing.
Profession-specific guides make this concrete. If you are in real estate, for instance, our post on tax write-offs for real estate agents in Canada walks through the categories that matter most for commission-based work.
This is exactly what ReInvestWealth's AI Bookkeeper handles automatically, sorting each transaction into the right category as it lands: see how it works.
Business-use-of-home: the rule competitors skip
If you work from home, you can claim a slice of your home costs (rent or mortgage interest, utilities, property tax, insurance) based on the share of your home used for business. Measure the square footage of your workspace against your home's total, and that percentage is roughly what you can claim.
The rule almost nobody mentions: business-use-of-home expenses cannot create or increase a business loss. If your business broke even or lost money this year, you cannot use home expenses to push it further into the red. Instead, the unused portion carries forward and waits for a profitable year. So your home-office claim is never wasted, just occasionally patient.
Capital cost allowance, explained without the jargon
Buy a $200 keyboard and you expense the whole thing this year. Buy a $3,000 laptop or a vehicle, and the CRA says: not so fast. Bigger, longer-lasting purchases are capital assets, and you deduct their cost gradually over several years through capital cost allowance (CCA), which is just tax-speak for depreciation.
You claim CCA in Area A of the T2125, where assets are grouped into "classes" with set yearly rates. The takeaway for a busy founder: you still get the full deduction, you just get it over time rather than all at once. You do not have to memorize the classes. You do have to keep the receipt.
A real example: a freelance marketing consultant's T2125
Numbers make this click. Meet Priya, a self-employed marketing consultant in Ontario. Here is her year on a T2125:
Gross fees (line 8000): $80,000 in business income
Advertising: $1,200
Meals and entertainment: $800 spent, so she claims $400 (the 50% rule)
Software and office supplies: $1,900
Professional fees (accountant + bookkeeping): $700
Motor vehicle: she drove 20% for business, claiming $1,400 of her vehicle costs
Business-use-of-home: her office is 10% of her apartment, and 10% of her $19,000 in annual home costs is $1,900
Add the expenses ($1,200 + $400 + $1,900 + $700 + $1,400 + $1,900 = $7,500) and subtract from $80,000. Priya's net income is $72,500, and that is the figure that flows to her T1 and gets taxed. Not the $80,000 she invoiced. That gap is exactly why filling out the T2125 properly matters: every legitimate expense you capture is income you are not taxed on.
Filing deadlines and the GST/HST $30,000 line
Two dates and one threshold to remember:
Filing deadline: Self-employed Canadians (and their spouses) have until June 15 to file the T1 return that includes the T2125.
Payment deadline: Any tax you owe is still due April 30. Filing later does not mean paying later, so if you expect a balance, set the money aside early.
The GST/HST threshold: Once your revenue passes $30,000 over four consecutive calendar quarters (or in a single quarter), you have to register for and start charging GST/HST. Not $30,000 in profit. $30,000 in sales. The upside is that once you register, you can claim back the GST/HST you paid on business expenses, which makes it the rare tax registration that can end in your favour.
Keep your records organized and these deadlines stop being scary. If you have ever wondered how long to hang onto everything, our guide on how far back the CRA can audit lays out the retention rules without the doom.
Practical tips to make next year's T2125 painless
The T2125 is only hard when your books are a mess. Three habits fix that:
Use a dedicated business bank account. Mixing personal and business spending is the fastest way to lose track of deductions. One account, one clean trail.
Capture receipts as you go, not in April. Snap or forward each receipt the moment you get it. The Smart Shoebox (your receipt inbox) stores them and matches them to your transactions, so the documentation is there when you need it.
Let software keep your books current. Over 3,000 entrepreneurs use ReInvestWealth to keep their books CPA-level clean all year. What that means for your T2125: when tax season arrives, your income and expense categories are already totalled, and filling out the form becomes a copy-paste job instead of an archaeology project.
T2125 frequently asked questions
What is the T2125 tax form?
The T2125, Statement of Business or Professional Activities, is the CRA form self-employed Canadians use to report their business or professional income and expenses. You file it as part of your personal T1 return, and it calculates the net income you are actually taxed on.
Who has to file a T2125?
Any self-employed person who is not incorporated: freelancers, consultants, gig and platform workers, contractors, sole proprietors, and partners in an unincorporated partnership. There is no minimum income, and you file a separate T2125 for each distinct business or profession.
What is the difference between business income and professional income?
Business income comes from selling goods or services in the ordinary course of business. Professional income comes from members of regulated professions, such as lawyers, doctors, engineers, and accountants, who usually account for work-in-progress. The tax treatment is identical; only the income line on Part 3 changes.
When is the T2125 due?
Self-employed Canadians have until June 15 to file the T1 return that includes the T2125. Any tax you owe, though, is still due April 30.
Can I claim business-use-of-home expenses on the T2125?
Yes, based on the share of your home used for business. The catch: business-use-of-home expenses cannot create or increase a business loss. Any unused portion carries forward to a future profitable year, so it is never lost.
Make the T2125 the easy part
The T2125 is not a test of your accounting knowledge. It is a summary of numbers you already have, assuming you kept track of them. Keep clean books through the year and the form fills itself in.
Connect your bank, let the AI categorize your transactions, and walk into tax season with your T2125 numbers already done. CPA-level clean books, a 30-day free trial, and no credit card required. Start for free →
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
Related: filling out the form as a freelancer? Here are the tax write-offs every freelancer in Canada can claim.
