You left the salaried job, printed business cards, and started billing clients by the day. The CRA now sees you as a business — and nobody is withholding tax from those invoices anymore. That’s the part that bites consultants in their first April.
Management consulting, IT contracting, marketing strategy, HR advisory — it all lands on Form T2125 (Statement of Business or Professional Activities), and the tax you owe is entirely your problem to plan for.
Nothing is withheld, so set it aside yourself
When you were an employee, income tax, CPP, and EI came off every cheque before you saw it. As an independent consultant, the client pays your invoice in full and you owe the tax later — usually all at once.
Set aside 25–30% of every payment the moment it lands. That covers income tax plus both halves of CPP (roughly 11.9% of net self-employment income, up to the annual maximum). On $90,000 of net consulting income, CPP alone runs into the low five figures (illustrative) before a dollar of income tax.
If you skip this and spend like it’s salary, you’ll be borrowing to pay the CRA. Don’t.
Business income vs. professional income
The T2125 splits into two columns, and consultants sometimes pick the wrong one.
Business income is most consulting — strategy, IT, marketing, operations. You bill for a service and report what you earned.
Professional income applies if you’re a member of a regulated profession (an accountant, lawyer, engineer, or similar) billing through your own practice. The main practical difference is how you handle work in progress — unbilled hours at year end.
Most independent consultants report under business income. If you carry a professional designation and bill clients directly, confirm which column applies before you file.
What consultants can actually deduct
The rule is simple: an expense is deductible if it’s reasonable and incurred to earn income. The mistake consultants make is not tracking the small, constant costs that add up to thousands.
| Expense | Deductible? | Notes |
|---|---|---|
| Home office | Yes (business-use %) | Square footage of your workspace ÷ total home area |
| Laptop, monitor, phone | Yes | Over $500 goes through CCA (Class 50 / 10, 8) |
| Software & SaaS subscriptions | Yes | Slack, Notion, Zoom, Adobe, LinkedIn Premium |
| Professional development | Yes | Courses, certifications, industry conferences |
| Liability/E&O insurance | Yes | Common requirement in consulting contracts |
| Accounting & legal fees | Yes | Including incorporation advice |
| Client meals | 50% | Keep who/what/why on the receipt |
| Travel to client sites | Yes | Flights, hotels, mileage at business-use % |
| Commuting to a regular office | No | Personal, even if the client is far |
Your home office is usually the single biggest miss. If your workspace is 12% of your home’s square footage, you can deduct 12% of rent (or mortgage interest, not principal), utilities, internet, and property tax. Our home office deductions guide shows the real math.
The GST/HST $30,000 line every consultant hits
Cross $30,000 in revenue over any four consecutive quarters and you’re required to register for GST/HST, charge it on your invoices, and remit it. Consultants hit this fast — three or four decent contracts and you’re there.
Two things people get wrong:
The $30,000 is revenue, not profit. Bill $32,000 and spend $10,000 on expenses? You still crossed the line.
GST/HST you collect isn’t your money. Set it aside separately from your 25–30% income-tax reserve. The Quick Method can let you keep a slice of what you collect, which often works well for low-expense consultants.
Should you incorporate?
The question every consultant asks once the invoices get bigger. The honest answer: it depends on whether you spend everything you earn.
If you withdraw all your income to live on, incorporating mostly adds accounting cost with little tax benefit. If you earn well beyond your living expenses and can leave money in the company, incorporation lets you defer personal tax on the retained profits — a real advantage that usually starts to matter somewhere around $100,000+ of net income.
There’s no magic threshold. It’s about retained earnings, liability, and your client contracts. We break down the full math at $60K, $100K, and $150K in our sole proprietor vs. incorporation guide.
Watch the “personal services business” trap
If you bill one client, work their hours, use their equipment, and look like their employee in everything but title, the CRA can label you a personal services business (PSB) — even if you’ve incorporated. PSBs lose most deductions and pay a punishing tax rate.
The defenses: multiple clients, your own tools, control over how you do the work, and the genuine ability to take on other contracts. If your “consulting” is really a full-time job wearing a contractor costume, get advice before the CRA decides for you.
Deadlines: June 15 to file, April 30 to pay
Self-employed Canadians file by June 15, but any balance owing is due April 30. Miss the payment date and interest backdates to May 1, filing extension or not.
If your net tax owing topped $3,000 this year and last, the CRA will also want quarterly instalments going forward. Our instalments guide covers the schedule.
| Deadline | What’s due |
|---|---|
| April 30 | Tax balance owing (payment) |
| June 15 | T1 + T2125 filing (self-employed) |
| 15th of Mar/Jun/Sep/Dec | Instalments, if required |
Let Accountly do the bookkeeping you keep putting off
Accountly tracks your consulting income, sorts software subscriptions and home-office costs into the right T2125 lines, flags when you’re closing in on the $30,000 GST/HST threshold, and keeps your receipts organized. Snap a photo, and it’s categorized for you.
Start free — about five minutes to set up.
Frequently asked questions
Do I report consulting income as business or professional income?
Most independent consultants report business income on the T2125. Professional income applies if you’re a member of a regulated profession (accountant, lawyer, engineer, etc.) billing through your own practice — the difference mainly affects how unbilled work in progress is handled.
Can I deduct my home office if I sometimes work from client sites?
Yes. As long as you have a dedicated workspace at home where you do administrative and prep work, you can claim the business-use percentage of your home costs, even if you spend many days on-site with clients.
When does a consultant have to register for GST/HST?
Once your revenue exceeds $30,000 over any four consecutive calendar quarters. It’s based on gross revenue, not profit. Below that, registration is optional but sometimes worth it to claim input tax credits.
Is it worth incorporating as a solo consultant?
It depends on whether you can leave profit in the company. If you spend everything you earn, incorporation mostly adds cost. If you retain earnings beyond your living expenses — often starting around $100,000+ of net income — the tax deferral can be worth it.
What is a personal services business and why should I care?
A PSB is when the CRA decides you’re effectively an employee of one client despite contracting (or incorporating). PSBs lose most deductions and face a high tax rate. Protect yourself with multiple clients, your own equipment, and genuine control over your work.
How much should I set aside from each consulting invoice?
Reserve 25–30% for income tax and CPP, and if you’re registered, set aside the GST/HST you collect on top of that — it’s never your money to spend.
The information in this guide is for general informational purposes only and is not intended as accounting, tax, business, or legal advice. Accountly does not provide professional services or act as your accountant, tax advisor, or lawyer. No client relationship is created by your use of this material. Always seek advice from qualified professionals who understand your particular circumstances before acting on any information contained herein.
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