Time Is a Taxable Supply
I was sitting across from a graphic designer last Tuesday—a brilliant kid, really—who looked like she’d just seen a ghost. She’d spent six months building a freelance empire, only to realize she’d been leaving a massive hole in her pocket because she wasn’t charging tax on hourly work correctly. She thought that because she was “just a freelancer,” the rules didn’t apply to her. That’s a dangerous myth that keeps me up at night. People think sales tax is only for big-box retailers, but if you’re billing for your time, the CRA doesn’t care about your “creative vibe”—they care about your registration status.
I’m not here to give you a lecture on the tax code or bury you in jargon that requires a law degree to decipher. My goal is to give you the straight talk I wish every one of my clients had understood before they hit their first audit. We are going to strip away the confusion surrounding charging tax on hourly work so you can stop guessing and start collecting what you actually owe. No fluff, no complicated spreadsheets—just the practical reality of keeping your business compliant and your bank account intact.
Dont Let Self Employment Tax Rates Eat Your Profit
Here is the reality most people miss: when you start billing hourly, you aren’t just trading time for money; you are managing a tax liability that lives in your bank account. A common mistake I see—usually when a client brings me a pile of disorganized digital invoices—is treating the sales tax collected from a client as “extra” income. It isn’t. That money belongs to the government from the moment it hits your account. If you don’t set it aside immediately, you aren’t actually making as much as your hourly rate suggests.
When you are navigating self-employment tax rates, the math gets even more sensitive. You have to account for the fact that while you are collecting tax on your services, you also have your own income tax obligations to meet at year-end. If you haven’t mastered how to include tax in hourly invoices properly, you might find yourself accidentally dipping into your tax reserves just to cover your daily operating costs. Don’t let your margin vanish because you forgot that the tax you collected was never yours to keep in the first place.
How to Include Tax in Hourly Invoices Without Friction
The easiest way to handle this is to stop thinking of the tax as “your money” and start seeing it as a pass-through. When you’re billing hourly clients for sales tax, the biggest mistake I see is trying to bake the tax into your hourly rate. If you decide your time is worth $100 an hour and you just send an invoice for $100, you’ve just given yourself a massive pay cut. You’ll end up writing a cheque to the CRA later for that amount, and suddenly your “profitable” month looks a lot thinner.
Instead, keep your line items clean and transparent. List your hours, your rate, and then add a dedicated line item for HST/GST at the bottom. It should look like a simple math equation: Service Subtotal + Tax = Total Due. This approach removes the friction because your clients see exactly what they are paying for. They aren’t being “surprised” by an extra fee; they are seeing a professional breakdown of their costs. It’s much easier to explain a clear tax line than it is to explain why your hourly rate suddenly jumped by 13% mid-project.
Five Ways to Keep the CRA Out of Your Hourly Profits
- Stop treating tax like an “extra” fee. If you’re registered for HST/GST, that tax isn’t your money—it’s the government’s money that you’re just holding for a few months. When you quote a client, be crystal clear if your hourly rate is “plus tax” or “tax inclusive.” If you say $75/hour and don’t mention tax, you’re effectively taking a 5% to 15% pay cut the moment you send that invoice.
- Watch your provincial boundaries. If you’re sitting in Ontario but your client is in Nova Scotia, you aren’t charging Ontario HST. You charge the rate where the service is actually consumed. I’ve seen far too many people use their home province’s rate for everything, which is a one-way ticket to a reconciliation headache during audit season.
- The “Small Supplier” trap is real. You might think you’re safe because you’re making under $30,000, but if you see that number climbing, start your registration early. Don’t wait until you’ve hit $31,000 to realize you’ve been under-collecting tax for the last six months. That’s money coming directly out of your pocket, not the client’s.
- Keep your hourly logs clean. If you’re billing by the hour, the CRA wants to see more than just a total at the bottom of a page. I need to see the date, the description of the work, and the hours spent. If you hand me a crumpled napkin that just says “Consulting – 10 hours,” I’m going to have a very difficult time defending that to an auditor.
- Don’t forget the Input Tax Credits (ITCs). While you’re busy collecting tax from your clients, make sure you’re collecting every single cent of tax you pay on your business expenses—your software subscriptions, your home office supplies, even that new laptop. If you aren’t tracking the tax you pay, you’re leaving money on the table that could offset what you owe.
The Bottom Line for Your Invoices
Stop treating tax like an afterthought; if you aren’t separating your hourly rate from the HST/GST on your invoices, you’re essentially paying your clients’ tax for them out of your own pocket.
Keep your bookkeeping as organized as a clean sheet of ice—don’t wait until year-end to realize you haven’t been tracking which clients are tax-exempt and which ones require a full line item.
Remember that the tax you collect isn’t “extra” income, it’s money you’re just holding in trust for the CRA, so treat that portion of your bank balance like it’s already gone.
The Bottom Line on Your Hourly Rate
At the end of the day, managing sales tax on your hourly billing isn’t about being a math whiz; it’s about not leaving money on the table. We’ve covered how to separate your actual labor from the tax portion, how to ensure your invoices are transparent enough to avoid client disputes, and why you need to set aside those GST/HST funds immediately so they don’t accidentally become part of your “profit.” If you get the math wrong now, you aren’t just losing a few cents per hour—you’re inviting a CRA audit that will take much more of your time than any invoice ever could. Keep your records tidy, keep your tax line items clear, and for heaven’s sake, keep that tax money in a separate account.
I know this feels like a massive detour from why you actually started your business. You wanted to be a designer, a consultant, or a contractor—not a part-time tax collector. But once you get these systems in place, the “tax anxiety” starts to fade, and you can get back to the work that actually matters. My goal is to make sure that when you eventually sit down with an accountant like me, you’re showing me a clean, organized set of books rather than a shoebox full of crumpled thermal paper. Get the foundation right now, and you’ll be able to scale your business without looking over your shoulder every time the mail arrives.
Frequently Asked Questions
If I'm only making a few thousand dollars a year, do I even need to be collecting HST/GST on my hourly rate?
The short answer is: if you’re making under $30,000 a year, you aren’t required to register for HST/GST. You’re considered a “small supplier.”
What happens if I bill a client in a different province—do I charge my local rate or theirs?
The Province Jump: Whose Rate Wins?
Can I still claim my home office expenses as a credit if I'm only charging for my time and not selling physical goods?
Short answer: Yes, you absolutely can. Whether you’re selling hand-knitted sweaters or your brainpower on an hourly basis, the CRA doesn’t care about your inventory—they care about your business activity. If you have a dedicated space used exclusively for earning that hourly income, those heating, electricity, and internet costs are legitimate business expenses. Just keep your receipts organized; I’ve seen enough “shoebox” disasters to know that a clear paper trail is your best friend.
