How to Fill Out Form T2125 (2026): A Plain Guide for Self-Employed Canadians

What is Form T2125?

If you earn money working for yourself in Canada — freelancing, driving, consulting, selling on Shopify, cutting hair, building decks — the Canada Revenue Agency (CRA) needs to know two things: how much you brought in, and what it cost you to bring it in. Form T2125, Statement of Business or Professional Activities, is where you tell them. It is the single most important tax form for the self-employed, and the good news is that once you understand its shape, it is far less intimidating than it looks.

T2125 is not a separate tax return. It is an attachment to your regular personal income tax and benefit return (the T1). You do not pay tax "on the T2125" — you use it to calculate one number, your net business income, which then gets copied onto your T1 and added to any other income you have. The CRA's official walkthrough lives on Completing Form T2125, and the deep reference is Guide T4002, Self-employed Business, Professional, Commission, Farming, and Fishing Income.

One form, one business. If you run two genuinely different businesses, you file a separate T2125 for each. If you have both business income and professional income (a profession with a governing body, like law or accounting), the CRA asks you to fill out a separate T2125 for each as well, per the CRA's completion guidance. For most freelancers and sole proprietors, though, it's one form, full stop.

Before you start: what you actually need

The form itself takes maybe 30 minutes if your records are tidy. The whole battle is the records. Before you open the PDF, have these ready:

• Your total revenue for the year — every dollar invoiced or collected, before fees, before expenses, before anything.
• Your expenses, sorted into categories — advertising, supplies, fees, vehicle, and so on. The T2125 has a named line for each common category.
• Your business number and HST/GST number, if you have them (you need a GST/HST number once you cross the $30,000 small-supplier threshold).
• Your industry code — a six-digit NAICS code describing what you do.
• Home-office and vehicle figures — total square footage and the business portion; total kilometres and business kilometres.

This is exactly why bookkeeping during the year, not in April, is the whole game. If your transactions are already categorized, filling out the T2125 is mostly transcription. If they aren't, this is the week you'll regret it. A self-employed bookkeeping app that maps your spending straight to T2125 categories turns tax season from archaeology into copy-paste.

The T2125, part by part

The form is organized into numbered parts that flow top to bottom. We'll walk each one in plain language, with the CRA line numbers so you can match what you see on the page. (Line numbers are stable from year to year; the figures below reflect the 2025 tax year you're filing in 2026.)

Part 1 — Identification (who you are)

This is the easy part: your name, social insurance number, the business name (your own legal name is fine if you never registered one), business address, and your fiscal period. Most self-employed people use a fiscal period that matches the calendar year — January 1 to December 31.

Two fields trip people up. The industry code is a six-digit NAICS code; pick the one that best describes your main activity (a graphic designer might use 541430, for example — the CRA lets you search codes in its certified software). The "Was this the final year of your business?" and partnership fields only matter if they apply to you. If you're a solo freelancer, leave the partnership section blank.

Part 2 — Internet business activities

If your business earns income through websites or web pages — including a Shopify store, an Etsy shop, or even a booking page — the CRA asks you to report the number of sites and your best estimate of the percentage of income they generate. This is required for anyone selling online. If you run an e-commerce store, our Shopify bookkeeping guide goes deeper on what counts here and how to reconcile platform payouts.

Part 3 — Income (what you brought in)

Here you report your gross income — total sales before any expenses. For business income, you'll work through Part 3A; for professional income, Part 3B. The headline figure is line 8000, your adjusted gross sales (or adjusted professional fees), which carries down into Part 3C, gross business or professional income, per the CRA's page on Part 3C – Gross business or professional income.

The single most common income error: reporting your income after you've already subtracted expenses. Don't. The T2125 is built to take gross income first and subtract expenses in their own section. If you net them out yourself, your gross-income figure will be wrong, and that's the number the CRA's matching systems watch most closely.

If you're registered for GST/HST, you generally report income net of the tax you collected (because that tax isn't yours — it's the government's, and you remit it separately). If you're not registered, you report the full amount you charged. Getting this clean is far easier when you track HST/GST as you go rather than untangling it at year-end.

Part 4 — Cost of goods sold and gross profit

This part only applies if you sell physical products and carry inventory. You record opening inventory, purchases during the year, and closing inventory to calculate your cost of goods sold, which gets subtracted from sales to give gross profit. Pure service providers — most freelancers, consultants, and gig workers — skip this entirely and move straight to expenses.

Part 5 — Expenses (and your net income)

This is the heart of the form. Every legitimate cost of running your business goes on its own named line. You can deduct any reasonable expense you incurred to earn business income, as the CRA explains on its business expenses page — but personal or living expenses don't count, and where something is mixed-use, you claim only the business portion.

The expense lines, decoded

Here's what goes where. These line numbers come straight from the CRA's expense guidance for the T2125.

Line	Category	What it covers
8521	Advertising	Ads, sponsored posts, business cards, listings, website ads
8523	Meals & entertainment	Client/business meals — only 50% is deductible
8590	Bad debts	Invoices you already counted as income but will never collect
8690	Insurance	Commercial insurance on business buildings, equipment, liability
8710	Interest & bank charges	Interest on business loans, business account fees, processing fees
8760	Business taxes, licences, memberships	Business licences, professional dues, annual fees
8810	Office expenses	Small office supplies — pens, paper, stamps, printer ink
8811	Office stationery & supplies	Items used directly in your work (separate from office expenses)
8860	Professional fees	Accountant, bookkeeper, lawyer, consultant fees
8871	Management & administration fees	Outsourced admin, software subscriptions in some cases
8910	Rent	Rent for business property or equipment (NOT your home office)
8960	Repairs & maintenance	Fixing business equipment and premises
9060	Salaries, wages, benefits	Pay for employees (not yourself — owners aren't "employees")
9200	Travel	Business travel: flights, hotels, transit (meals on the road go on 8523)
9220	Utilities	Utilities for a business premises (home utilities go in home-office)
9224	Fuel costs (except vehicle)	Fuel for business equipment, not your car
9275	Delivery, freight, express	Shipping and courier costs
9281	Motor vehicle (not CCA)	Business portion of fuel, insurance, repairs, registration
9270	Other expenses	Legitimate costs that don't fit elsewhere; describe them
9936	Capital cost allowance (CCA)	Depreciation on equipment, vehicles, and other capital assets

When you total all of these, you get line 9368, total business expenses. Subtract that from your gross income and you have line 9369, net income (loss) before adjustments — the figure the CRA's Part 5 – Your net income (loss) page describes. You're almost done — but two big deductions come after this line: motor-vehicle CCA adjustments and business-use-of-home.

Meals and entertainment: the 50% rule

This one catches everyone. When you take a client to lunch or grab a coffee meeting, you can deduct only 50% of the lesser of what you paid or a reasonable amount, per the CRA's line 8523 guidance. Spend $80 on a client dinner, claim $40. The form has a working area where you enter the full amount and it halves it for you — but if you're tracking expenses manually, remember to record the full receipt and let the form do the math, not the other way around.

The motor-vehicle section (line 9281)

If you use your car for work, you can deduct the business portion of running it. The mechanism is a ratio: business kilometres ÷ total kilometres driven in the year. Drive 20,000 km total and 8,000 of those for business, and 40% of your eligible vehicle costs are deductible.

What counts: fuel, insurance, licence and registration, maintenance and repairs, and lease costs (within limits). The CRA details these on its motor vehicle deductible expenses page. The running costs go on line 9281; if you own the vehicle, its depreciation is claimed separately as capital cost allowance on line 9936.

The non-negotiable here is a logbook. The CRA expects a record of your business trips — date, destination, purpose, and kilometres. Without it, a reviewer can disallow the entire claim. A simple running log all year beats a panicked reconstruction in April every time.

Business-use-of-home (line 9945): the deduction everyone wants and few do correctly

If you work from home, you can deduct a share of your housing costs — but only if your workspace meets one of two tests, per the CRA's business-use-of-home expenses page:

1. The workspace is your principal place of business (your main place of work), OR
2. You use the space only to earn business income AND use it regularly to meet clients, customers, or patients.

The nuance: if the space is your principal place of business, it doesn't need to be used exclusively for work — a corner of your living room can qualify. But a space that is not your principal place of business must be used 100% for business, with no personal use at all.

To calculate your claim, take the business portion of your home. The standard method is area — the square footage of your workspace divided by the total square footage of your home. If a room does double duty (a dining table that's a desk by day), you also prorate by the hours you use it for business out of 24. You can claim that percentage of heat, electricity, home insurance, cleaning materials, property taxes, and mortgage interest — and, if you choose, CCA on the home (most people skip home CCA to protect their principal-residence exemption).

You enter your share of the result on line 9945. Two rules matter enormously:

• Home-office expenses cannot create or increase a business loss. If your business made $3,000 and your home-office portion is $4,000, you can only claim $3,000 this year.
• The unused portion carries forward. That extra $1,000 isn't lost — it carries to a future year and can offset income from the same business when you're profitable enough to use it.

Crossing the finish line: net income → line 13500

After home-office expenses, you arrive at line 9946, your net income (loss) — the actual profit (or loss) from your business. This is the number that leaves the T2125 and lands on your personal return.

On your T1, you report the gross figure on line 13499 and the net figure on line 13500, as set out on the CRA's self-employment income (lines 13499 to 14300) page. That net amount is added to your other income, and your federal and provincial tax — plus CPP — is calculated on the total.

That last point surprises new freelancers: net business income doesn't just attract income tax. As a self-employed person you pay both halves of CPP — 11.9% on net business income between $3,500 and $74,600 for 2026, up to roughly $8,461, plus CPP2 on earnings above that, per the CRA's CPP contribution rates. (In Quebec, it's QPP at 12.6%.) This is the biggest reason your tax bill feels heavier than an employee's on the same income — and the reason setting money aside as you earn it matters so much. Run your number through our Tax Jar set-aside calculator to see what to hold back before you spend it.

The most common T2125 mistakes

• Claiming 100% of mixed-use costs. Your phone, your car, your internet, your home — if you use them for personal life too, you can only claim the business portion. Estimate honestly and keep a basis for the number.
• Forgetting the 50% meals haircut. Entering the full restaurant total on line 8523 instead of half is a classic, and an easy reassessment for the CRA.
• Reporting income net of expenses. Always gross income first, then expenses in their own section. Netting them out distorts the line the CRA watches.
• Paying yourself a "salary." A sole proprietor can't deduct their own draws as wages. Line 9060 is for actual employees only; money you take out of the business is just profit you already paid tax on.
• No documentation for vehicle or home claims. No logbook, no square-footage basis — no deduction if reviewed.
• Missing the filing-vs-payment date gap. Self-employed Canadians get until June 15 to file, but any balance owing is due April 30; interest accrues from May 1 on unpaid amounts. We unpack the full timeline in our CRA tax-filing guide for self-employed Canadians.

How to make next year's T2125 a 20-minute job

The T2125 is hard exactly once — the year you do it from a shoebox of receipts. Everything painful about it (categorizing, the 50% meals split, the home and vehicle ratios, separating HST) is solved by recording transactions as they happen, mapped to the right line. That's the whole premise behind VRITTI: your spending sorts itself into T2125 categories, your HST/GST is tracked as you go, your tax set-aside grows in a Tax Jar so the bill never ambushes you, and your instalment dates are calculated for you. Come tax season, the numbers are already there — you're transcribing, not reconstructing. Money without the shame, and a T2125 that almost fills itself out.

For the authoritative reference on any line, the CRA's Completing Form T2125 hub and Guide T4002 are the source of truth — and worth a bookmark.