GST/HST filing guide for Canada.

Canadian businesses must register for GST/HST once taxable supplies exceed 30,000 dollars in a single calendar quarter or across four consecutive quarters. Filing frequency follows annual taxable supplies, and monthly and quarterly filers must file and pay within one month of the period end. Registration is with the Canada Revenue Agency.

Who has to register for GST/HST?

Almost every business selling taxable goods or services in Canada, once it stops being a small supplier. You cease to be a small supplier the moment your worldwide taxable supplies exceed 30,000 dollars in a single calendar quarter, or over the previous four consecutive calendar quarters. The threshold counts revenue, not profit, and it includes zero-rated sales. The Canada Revenue Agency's hub for the tax is GST/HST for businesses.

Two timing rules trip people up. If you exceed the threshold in a single calendar quarter, you stop being a small supplier immediately and must charge on the supply that took you over. If you exceed it across four quarters, you have a one month grace period, then registration is required. Taxi and ride-share operators sit outside the small supplier test altogether and register before they carry a paying passenger. Non-residents selling digital products or services to Canadian consumers have had their own simplified registration route since 1 July 2021.

Voluntary registration below the threshold is often worth it. A business with meaningful input tax credits to recover, or one selling business to business where customers recover the tax anyway, is usually better off registered. A consumer-facing business below the threshold usually is not, because registering makes you more expensive to the customer with no offsetting benefit.

What are the GST and HST rates by province?

Canada runs three parallel systems. The federal GST applies everywhere at 5 per cent. Participating provinces replaced their sales tax with a harmonized rate, HST, collected through the same return. Quebec runs QST alongside GST, administered by Revenu Quebec rather than the CRA. British Columbia, Saskatchewan and Manitoba levy a separate provincial sales tax that has nothing to do with your GST/HST return.

Rates change by provincial budget, so confirm the current figure on the CRA site before repricing a contract. The rate that applies is determined by place of supply rules, not by where your office is. An Ontario consultancy billing a client in Halifax charges Nova Scotia HST, and getting the place of supply wrong on a large contract creates an assessment on the difference plus interest.

The GST/HST filing guide for Canada: deadlines and frequency

Reporting frequency is assigned from your annual taxable supplies, with the option to file more often than required. Filing more often is usually the right choice for a business in a persistent refund position, because it converts an annual receivable into a monthly one.

Annual filers face two extra rules. Where the business is an individual with a 31 December year end and business income, the return is due 15 June while the payment is due 30 April, which is the single most common late payment in the whole regime. Annual filers with net tax above the prescribed threshold must also make quarterly instalments during the year, and interest applies on shortfalls even though the return itself is not yet due.

What can you claim as input tax credits?

Input tax credits recover the GST/HST you paid on purchases used in commercial activity. The claim requires more than a bank statement. You need supporting documentation showing the supplier's name, the date, the amount, and above a low value threshold the supplier's GST/HST registration number. A supplier that is not registered cannot charge the tax, and an ITC claimed on a fake registration number is disallowed on audit.

Most businesses have four years from the due date of the return in which the credit could first have been claimed to claim it, and certain large businesses and listed financial institutions have two. That window is generous, and it is the reason a catch-up cleanup on a Canadian entity so often produces a refund. Our catch-up bookkeeping service handles exactly this work, and the catch-up bookkeeping process post sets out the order we do it in.

Some costs are restricted. Meals and entertainment are generally limited to 50 per cent, club memberships are blocked, and purchases used to make exempt supplies produce no credit at all. That last point is the one that catches health, dental and financial services businesses, whose output is exempt rather than zero-rated.

What is the difference between zero-rated and exempt?

Zero-rated supplies are taxable at 0 per cent, so you charge nothing and still recover the tax on your inputs. Basic groceries, prescription drugs, most medical devices and exports are zero-rated. Exempt supplies are outside the tax entirely, so you charge nothing and recover nothing. Most residential rent, most health and dental services, and financial services are exempt.

The distinction decides whether registration helps you or hurts you. An exporter is almost always in a refund position and should file monthly. A residential landlord making exempt supplies gets no credit for the tax on repairs and maintenance, and registering achieves nothing. Landlords running mixed portfolios should read our landlord and property SPV accountants page, since the same distinction drives the equivalent UK question.

Is the Quick Method worth using?

The Quick Method lets eligible small businesses remit a fixed percentage of GST/HST-included sales instead of tracking input tax credits line by line. Eligibility turns on annual taxable supplies including tax staying at or below the prescribed limit, currently 400,000 dollars, across the relevant four quarters, and several sectors are excluded, including accountants, bookkeepers, lawyers and financial consultants.

It suits service businesses with low input costs, where the remittance rate is below the effective rate you would otherwise pay after credits. It is a poor fit for anyone with significant purchases, since you give up most of the ITC claim to get it. Model one year of actual purchases both ways before electing, and confirm the current eligibility limit with the CRA, because it has been revised before.

What are the penalties for filing late?

The failure to file penalty is calculated as 1 per cent of the amount owing, plus a quarter of that 1 per cent multiplied by the number of complete months the return is late, up to a maximum of twelve months. Interest compounds daily at the prescribed rate, which is reset quarterly. A demand to file that is ignored carries a further fixed penalty.

Electronic filing is now the default expectation rather than an option. Most GST/HST registrants have been required to file electronically for reporting periods beginning in 2024, with limited exceptions, and a paper return filed where electronic filing was mandatory attracts its own penalty. File through the CRA's business portal, and register for direct deposit while you are there, because refunds on paper cheques take considerably longer.

If you have unfiled periods, deal with them before the CRA writes to you. Voluntary disclosure carries relief that a compliance letter removes. The general CRA index is at Canada Revenue Agency.

How does GST/HST fit the rest of the Canadian calendar?

GST/HST is one of four recurring obligations for an incorporated Canadian business, and lining them up is most of what a clean year looks like: the sales tax return on its assigned frequency, source deductions on payroll by the 15th of the following month for regular remitters, the T2 corporate return within six months of year end with tax payable within two or three months depending on the corporation, and T4 slips by the end of February. Payroll mechanics are covered by the CRA at payroll, and our multi-jurisdiction payroll service runs it alongside the equivalent obligations in other markets.

One opinion, from filing these: the most expensive mistake in Canadian sales tax is not a late return, it is a place of supply assumption applied to a year of invoices before anyone checks it. A national services business charging one rate to every province is either overcharging clients or accruing an assessment, and the error compounds silently until an audit or a due diligence exercise surfaces it. Check the place of supply rules once, properly, when you start selling outside your home province.

Our accountants for Canadian SMEs page sets out how we run this calendar, and VAT, GST and tax compliance covers the equivalent regimes in the other four markets we serve. If you sell into the United States as well, the US sales tax nexus guide is the companion piece, because the two systems answer the same commercial question in completely different ways. Terms used here are defined in our accounting and tax glossary.