GST/HST & Buyer's Premium at Canadian Auctions Explained (2026)

The biggest mistake new buyers make at Canadian government surplus auctions is reading the current bid as the price. It isn't. By the time you've collected your item, sales tax and transport have been added to the figure on screen. The good news is that Canada's main federal channel, GCSurplus, is unusually clean about this — no hidden buyer's premium — so the maths is simpler than at a commercial auctioneer. This guide explains exactly what you'll pay.

Your True Cost in One Line

For a typical GCSurplus purchase, your total cost is:

Winning bid + applicable GST/HST + pickup/transport.

Notice what's not in that line: a buyer's premium. That single omission makes Canadian federal surplus cheaper, lot-for-lot, than many private and commercial auctions. More on that below.

GST/HST — Based on Your Pickup Province

Government surplus is generally taxable, so GST or HST is added on top of your winning bid. The rate is determined by the province where you pick the item up, which is why the lot's location matters for more than just the drive.

Canada's sales-tax structure is a patchwork:

• **5% GST** — provinces that levy the federal Goods and Services Tax on its own. This covers **Alberta**, plus **Saskatchewan, Manitoba and British Columbia** (note that SK, MB and BC also have a separate **provincial sales tax (PST)**, and BC its own PST, which can apply depending on the item — so in practice you may see 5% GST on the auction with PST handled separately).
• **13% HST** — **Ontario**, which blends the federal and provincial portions into a single Harmonized Sales Tax.
• **15% HST** — the Atlantic provinces: **Nova Scotia, New Brunswick, Newfoundland and Labrador, and Prince Edward Island.**
• **Quebec** uses GST (5%) federally plus its own **QST**, administered provincially.

The reason for the variation is that some provinces "harmonized" their provincial tax with the federal GST into a single HST, while others kept GST and PST (or QST) separate. For a buyer, the practical rule is simple: the tax rate follows the province where the item is located and collected. A truck collected in Halifax carries 15% HST; the same truck collected in Calgary carries 5% GST.

Buyer's Premium — Usually None on GCSurplus

A buyer's premium is a percentage fee that auction houses add to the winning bid — commonly 10–20% at commercial and online auctioneers. It's how those businesses earn their margin, and it can quietly inflate your total by a fifth.

GCSurplus generally does not charge a buyer's premium. As a federal government programme, it's recovering value for taxpayers rather than running a commercial margin, so your cost is essentially just the bid plus tax plus collection. This is a genuine, meaningful contrast with private auctioneers — and it's worth keeping in mind when you compare a GCSurplus lot against a similar item on a commercial platform that does add 15–18%.

The caveat: GCSurplus is the federal channel. Provincial, municipal and third-party platforms vary. Some municipal surplus is sold through commercial aggregators that do apply a buyer's premium, and terms differ by seller. Always read the specific sale's terms before you bid, and check explicitly for a premium line.

Worked Example

Say you win a used cargo van for a hammer bid of $8,000, and you'll collect it in Ontario (13% HST), on GCSurplus (no buyer's premium), and you hire a driver to bring it home for $300.

Now compare the same $8,000 van bought on a commercial auctioneer that charges a 15% buyer's premium, also in Ontario:

Same hammer price, but the buyer's premium — and the tax charged on that premium — adds well over a thousand dollars. That's why knowing whether a premium applies is as important as the tax rate.

Tips to Avoid Surprises

Always check for a buyer's premium. GCSurplus generally has none, but municipal, provincial and third-party sales may differ. Read the terms.

Know your pickup province's rate. 5% GST, 13% HST or 15% HST — it follows where you collect, and on Quebec/BC/Prairie lots there may be a separate provincial tax to consider.

Calculate the real total before bidding. Bid + tax + (premium, if any) + transport. Make that your maximum.

Keep your invoice. Businesses registered for GST/HST may be able to claim input tax credits on eligible purchases — keep the documentation and check the CRA rules or your accountant.

Don't forget collection. Everything is "where is" — transport is a real cost on top of bid and tax.

Frequently Asked Questions

How much tax do I pay at a Canadian government auction?

GST or HST is added to your winning bid based on the province where you pick the item up: 5% GST in non-HST provinces such as Alberta and British Columbia, 13% HST in Ontario, and 15% HST in the Atlantic provinces. Quebec adds QST on top of the 5% GST. In some provinces a separate provincial sales tax may also apply depending on the item.

Does GCSurplus charge a buyer's premium?

Generally no. As the federal government's surplus channel, GCSurplus typically does not add a buyer's premium, unlike commercial auctioneers who often charge 10–20%. Your cost is essentially the winning bid plus applicable GST/HST plus collection. Provincial, municipal and third-party platforms may differ, so always check the specific sale's terms.

Why is the sales tax rate different across provinces?

Because Canada's provinces handle sales tax differently. Some harmonized their provincial tax with the federal GST into a single HST (13% in Ontario, 15% in the Atlantic provinces), while others kept the 5% GST separate, sometimes alongside a provincial sales tax (PST) or Quebec's QST. The rate that applies to your purchase follows the province where you collect the item.

What's my total cost on a government surplus purchase?

For a typical GCSurplus lot it's: winning bid + applicable GST/HST + pickup/transport, with no buyer's premium. For example, an $8,000 van collected in Ontario is $8,000 + $1,040 HST + transport. On a commercial auctioneer that adds a buyer's premium, expect the premium (and tax on it) to push the total noticeably higher.

Can a business reclaim the GST/HST on a surplus purchase?

A business registered for GST/HST may be able to claim input tax credits on the tax paid for eligible purchases used in commercial activity, provided it keeps the proper invoice. The rules and eligibility are set by the CRA, so confirm with the CRA guidance or your accountant. Private buyers cannot recover GST/HST.