
Buying Used Does Not Always Mean Buying Tax Free
I was sitting across from a client last Tuesday—a guy who runs a decent little landscaping outfit—and he looked like he’d just been told the CRA was moving into his spare bedroom. He had sold a piece of heavy equipment to a neighbor, thought he was just making a little extra cash to cover his summer repairs, and then realized he might actually owe money on the transaction. This is the problem with how people talk about hst on used goods; they make it sound like some impenetrable mystery designed to trip you up, when really, it’s just a set of rules that most people aren’t taught until they’ve already made a mistake.
I’m not here to give you a lecture or recite the tax code verbatim. Instead, I’m going to give you the straight talk on how this actually works when you’re moving inventory or selling off old assets. We are going to strip away the jargon and look at exactly when you need to collect tax, when you can skip it, and how to avoid the kind of paperwork nightmare that ends up in my “worst shoebox” file. My goal is to make sure you keep your money where it belongs—in your business.
The Gsthst on Resale of Personal Property Pitfall

Here is where I see the most preventable headaches. Most people assume that if they didn’t buy something brand new with a formal invoice, the tax man isn’t interested. That is a massive misconception. When you are dealing with the GST/HST on resale of personal property, the CRA doesn’t care if the item came from a warehouse or a neighbor’s garage; if you are in the business of selling it, the tax obligation follows the transaction. I’ve seen too many entrepreneurs treat used inventory like a hobby, only to realize during an audit that they’ve been ignoring their collection duties entirely.
The real danger lies in the tax implications of trading in goods. If a client brings you a used piece of equipment as part of a trade-in for a new one, you can’t just “swap” them and call it a day. You have to account for the value of that trade-in as part of the total consideration. It’s a common trap that turns a simple sale into a math nightmare. If you aren’t calculating sales tax on used merchandise with the same rigor as your new stock, you’re essentially just handing your profit margin directly to the government.
Calculating Sales Tax on Used Merchandise Without Losing Money
Here is where most of my clients start to sweat, and frankly, they shouldn’t have to. When you are calculating sales tax on used merchandise, the math isn’t always as straightforward as slapping 13% on the sticker price. If you bought an item from a non-registered individual—say, a neighbor selling an old lawnmower—you didn’t pay any HST on that initial purchase. However, the moment you turn around and sell it to a customer, the CRA expects their cut of the full selling price. You cannot simply charge tax on the “profit” margin; you owe it on the entire transaction.
This is a classic trap for anyone dealing with small business HST on used inventory. I’ve seen people try to “net out” the tax, thinking they only owe the difference between what they paid and what they sold it for. That is a fast track to an audit. If you aren’t careful with your bookkeeping, you’ll end up paying that tax out of your own pocket come filing time. Treat every used item like a brand-new one in your ledger: track the acquisition clearly, but remember that the tax liability is tied to the gross sale amount.
Five Ways to Keep the CRA Out of Your Pocketbook
- Stop treating “used” as a magic word. Just because an item isn’t brand new doesn’t mean the tax man ignores it; if you’re in the business of selling these goods, the CRA still expects their cut of the transaction.
- Watch your paper trail like a hawk. I’ve seen enough shoeboxes full of faded thermal receipts to know that if you can’t prove what you paid for an item (including the tax you paid), you’re going to have a very expensive conversation with an auditor.
- Don’t forget your Input Tax Credits (ITCs). If you’re buying used inventory from someone who isn’t registered for HST, you won’t get a credit to offset your sales tax, which means you need to price your items carefully to protect your margins.
- Distinguish between a hobby and a business. If you’re just selling your old lawnmower on Marketplace, you’re fine, but the moment you start flipping used gear regularly for profit, you’ve crossed the line into a taxable business.
- Keep your personal and business piles separate. This sounds obvious, but I see it every day—mixing up the sale of your personal old sofa with your business’s used stock is a shortcut to a messy audit and a massive headache.
The Bottom Line: Don't Let the CRA Surprise You
Stop treating used inventory like a personal hobby; if you’re buying items specifically to flip them for profit, the CRA views that as a business transaction, and you need to be ready to collect and remit the tax.
Always keep your paper trail clean—I’ve seen too many people lose their Input Tax Credits because they couldn’t prove what they originally paid for an item, so keep those receipts (and please, keep them out of a shoebox).
Don’t bake the tax into your profit margin by mistake; calculate your sale price based on the total amount including HST so you aren’t accidentally paying the government out of your own pocket.
Don't Let the Paperwork Win
At the end of the day, navigating HST on used goods boils down to two things: knowing whether you’re actually in the business of reselling and keeping a paper trail that doesn’t look like a disaster zone. Whether you are dealing with the complexities of the margin scheme or trying to figure out if a one-off sale of equipment triggers a registration requirement, the goal is the same—don’t get caught off guard by a CRA audit because of a simple misunderstanding. Remember, it is much cheaper to set up a decent tracking system now than it is to pay back-taxes and interest three years from now when your shoebox of receipts finally hits my desk. Keep your records clean, know your margins, and don’t guess when it comes to tax rates.
I know it feels like a massive distraction from the actual work you love, but getting this right is how you protect the business you’ve built. You didn’t start this company to become an amateur tax auditor, and you shouldn’t have to. My job is to help you clear these hurdles so you can get back to what matters. Take a breath, get your filing system in order, and stop letting tax anxiety run your business. You’ve got the talent to run a successful operation; don’t let a few misplaced receipts be the thing that trips you up.
Frequently Asked Questions
If I bought a piece of equipment tax-free because I wasn't registered yet, do I still have to charge HST when I eventually sell it?
Short answer: Yes. The CRA doesn’t care how you acquired the item; they care about what you’re doing with it now. If you’re registered for HST when you sell that equipment, you have to charge tax on the full sale price. Don’t fall into the trap of thinking you can only charge tax on the “profit” or the difference between your cost and the sale price. It’s the whole amount, every time.
I’m just selling off some old office furniture to clear space—do I actually need to collect HST on that, or is it exempt?
If you’re a GST/HST registrant, the short answer is yes. Even if it’s just “old office furniture,” the CRA views this as a taxable sale. You can’t just decide it’s exempt because it’s used. You need to collect the tax based on your province’s rate and remit it. However, don’t forget you can likely claim an Input Tax Credit on the original purchase if you have the records. Check your files before you sell.
How do I actually prove to the CRA that the item I'm selling is "used" so they don't try to tax me on the full original value?
Look, the CRA isn’t going to take your word for it just because you say it’s old. You need a paper trail. I tell my clients to keep a “provenance folder.” This means saving the original purchase receipt, a dated photo of the item showing its condition, and a simple written record of when you acquired it. If you’re buying it from a client, have them sign a basic bill of sale. It’s a bit of extra paperwork now, but it beats a massive audit headache later.