- Under the federal Excise Tax Act, which governs GST/HST across Canada, a registrant that collects HST is treated as holding those amounts in trust for the Crown from the moment they're…
- " Reality: The HST was never the business's money to begin with — using it to cover other obligations creates a shortfall the business now has to find money to fix, on top of the…
- The deemed trust concept becomes most relevant when a business is under financial pressure — behind on remittances, short on cash, or heading toward insolvency.
When a customer pays an invoice that includes HST, that money lands in the same bank account as the rest of your revenue — which is exactly why so many Ontario business owners treat it as available cash. Legally, it isn't. The HST deemed trust rule treats the tax portion of every payment as money you're holding on behalf of the government, not money that belongs to the business.
This distinction sounds technical, but it has real consequences when cash gets tight. Businesses that dip into collected HST to cover payroll or rent during a rough month often assume they'll "catch up" before the return is due. The deemed trust rule is part of why the CRA treats that shortfall more seriously than an ordinary unpaid bill.
Here's what the rule actually means and how it plays out in practice.
The Basic Idea
Under the federal Excise Tax Act, which governs GST/HST across Canada, a registrant that collects HST is treated as holding those amounts in trust for the Crown from the moment they're collected until they're remitted. In plain terms: the tax component of a sale is never really an asset of the business, even while it sits in the business's operating account alongside everything else.
Myth vs. Reality
Myth: "If cash is tight, I can use this month's HST to cover payroll and pay it back next quarter." Reality: The HST was never the business's money to begin with — using it to cover other obligations creates a shortfall the business now has to find money to fix, on top of the original expense it was trying to cover.
Myth: "As long as the business pays it eventually, it doesn't matter that I used it temporarily." Reality: The deemed trust status affects how seriously the CRA and other creditors treat the shortfall, not just whether the money eventually shows up.
Why It Matters More in a Financial Crunch
The deemed trust concept becomes most relevant when a business is under financial pressure — behind on remittances, short on cash, or heading toward insolvency. Unremitted, trust-status HST is treated differently from an ordinary trade debt, which is part of why advisors urge business owners never to treat collected sales tax as a flexible cash cushion.
Director's Liability
This isn't only a corporate-level concern. Directors of a corporation can become personally liable for a corporation's unremitted GST/HST (and unremitted source deductions) if the corporation fails to remit what it owes — commonly called director's liability. A director who lets HST remittances slide isn't only creating a corporate problem; they may be creating a personal one.
Practical Steps to Avoid the Trap
- [ ] Keep collected HST conceptually — and ideally physically — separate from operating cash, such as in a dedicated account
- [ ] Set remittance amounts aside as soon as a sale is invoiced, rather than waiting until the filing deadline
- [ ] Treat a cash shortfall in HST funds as an urgent problem, not a timing issue to solve later
- [ ] Get advice immediately if remittances have already fallen behind, rather than waiting for the CRA to make contact first
Frequently asked questions
Does the deemed trust rule apply to income tax source deductions too?
Yes, a comparable deemed trust concept applies to unremitted employee source deductions — income tax, CPP, and EI withheld from payroll — under a separate part of the tax rules. Both reflect the same underlying idea: money withheld or collected on the government's behalf isn't the business's to spend.
Can the CRA take priority over my other creditors because of the deemed trust?
The deemed trust can give the Crown a priority claim over certain other creditors in some circumstances, particularly around insolvency. This is a complex area where the specific facts and other security interests matter a great deal, and general statements about priority shouldn't be relied on without advice.
I already used HST funds to cover a cash shortage — what should I do?
Address it as soon as possible: figure out exactly what's owed, arrange to remit or catch up, and get advice if a corporation is involved and directors could be personally exposed.
Is this rule specific to Ontario?
No — the deemed trust concept comes from the federal Excise Tax Act and applies to GST/HST across Canada. Ontario businesses are subject to it the same as businesses in any other province.
Does it matter if the shortfall was unintentional, like a bookkeeping error?
The trust obligation itself doesn't turn on intent — the money is treated as trust funds regardless of why it wasn't set aside. That said, how a shortfall arose can matter once you're dealing with the CRA or, for a director, addressing personal exposure, so keep a clear record of what happened.
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