- If you're negotiating a sale rather than simply winding down, see our guide on buying and selling a business — HST treatment on a sale can differ meaningfully from an ordinary closure,…
- Businesses rarely close on a day when every invoice has been paid.
Closing a business involves a checklist most owners don't think about until they're in the middle of it — and HST deregistration is one item that's easy to overlook. Filing a proper final HST return matters even if the business had modest sales, because leftover assets and an unfiled registration can create problems long after the storefront sign comes down.
The core idea is straightforward: your HST registration doesn't disappear on its own the moment you stop operating. You need to actively close it out, and doing so can trigger tax consequences on assets you still own.
This guide walks through the steps, in order, and flags the one most owners miss.
Step-by-Step: Closing Out Your HST Account
- Decide on your effective closing date. This is the date you stop, or plan to stop, carrying on commercial activity.
- Account for remaining business assets. When you deregister, the CRA generally treats you as having sold your remaining business assets — equipment, inventory, goodwill — at fair market value immediately before deregistration, even though no actual sale to an outside buyer occurred. This can generate HST payable on assets you still physically own.
- File your final return. The return covers the period up to your closing date and must reflect the deemed disposition described above, along with your ordinary collected HST and input tax credits for the period.
- Formally cancel the GST/HST registration. Filing a final return and closing the account are related but separate administrative steps — confirm both are actually completed.
- Keep your records. Ontario businesses are expected to retain books and records for a period after closing, not just up until the closing date itself.
Selling the Business vs. Winding It Down
| Selling to a buyer | Winding down or dissolving | |
|---|---|---|
| HST on assets | May qualify for relief on the sale of a business if the deal is structured correctly — get advice before you sign, not after | Deemed disposition rules generally apply to assets you retain or dispose of outside a sale |
| Registration | Buyer typically takes over the commercial activity; the seller still closes out their own account | Account is deregistered once the activity ends |
| Timing pressure | Often driven by the closing date in a purchase agreement | Driven by your own wind-down timeline |
If you're negotiating a sale rather than simply winding down, see our guide on buying and selling a business — HST treatment on a sale can differ meaningfully from an ordinary closure, and getting it wrong can affect the purchase price itself.
Outstanding Invoices at Closing
Businesses rarely close on a day when every invoice has been paid. If you've charged HST on a sale that a customer hasn't yet paid, that amount generally still needs to be accounted for on your final return based on when it became collectible, not on whether the cash has actually come in. Conversely, if you still owe money to suppliers who charged you HST, keep those invoices — you may still be able to claim the input tax credit on the final return even though you haven't paid the bill yet, provided you otherwise meet the usual conditions.
Reconcile your accounts receivable and payable specifically for this purpose before you file, rather than relying on a bank-balance snapshot.
Why Skipping This Step Is Risky
An HST account left open with no returns filed doesn't just quietly fade away. Outstanding filing obligations can accumulate, and the CRA can still assess the account for the deemed disposition on assets even after the business has effectively stopped operating. Directors can also face personal exposure for unremitted GST/HST if the corporation fails to remit what's owed before it winds down.
Frequently asked questions
Do I need to file a final HST return if my business never made much money?
Yes. The obligation to file a final return and account for any deemed disposition applies regardless of how much revenue the business generated.
What if I'm just pausing the business, not closing it permanently?
If you intend to resume commercial activity, deregistering may not be the right move — talk to an advisor before cancelling, since re-registering later carries its own implications.
Can I deregister for HST but keep the corporation active?
Generally yes — HST registration and corporate existence are separate. A corporation can remain incorporated with no active GST/HST registration once it has stopped commercial activity.
Who is responsible for filing the final return if I sell the business?
As the seller, you're generally responsible for your own final return covering your period of ownership; the buyer handles their own registration going forward.
What if I already stopped operating months ago but never filed anything?
File as soon as possible rather than waiting. The obligation doesn't disappear with time, and addressing it proactively is generally easier than waiting for the CRA to raise it first.
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