GST/HST and QST filing frequency: how it changes your accounting workload and fees

How often your corporation files GST/HST returns is one of the quiet drivers of your accounting bill. The CRA assigns a reporting period based on annual taxable supplies: annual if they are $1,500,000 or less, quarterly if they are more than $1,500,000 up to $6,000,000, and monthly above $6,000,000. Each return means reconciling sales tax collected and input tax credits claimed, so twelve returns a year cost more than one, even when the totals are the same. In Quebec the QST runs alongside the GST and both are generally administered by Revenu Québec, which adds its own steps.

This guide is part of the corporate accountant fees overview. Dollar figures are illustrative.

When a corporation has to register

A corporation that makes taxable supplies in Canada generally has to register for GST/HST once it is no longer a small supplier, which in general terms means its worldwide taxable supplies, together with those of associated persons, exceed $30,000 in a single calendar quarter or over the last four consecutive calendar quarters. Some businesses, such as taxi and commercial ride-sharing operators, must register from their first sale regardless of revenue. Many small corporations register voluntarily before reaching the threshold so they can claim input tax credits.

Quebec's QST uses a parallel small supplier rule. Confirm the current rules for your situation on the CRA and Revenu Québec sites before deciding; registration questions are a common source of catch-up work.

How reporting periods are assigned

A business can elect to file more often than assigned, for example monthly, which some exporters and businesses that usually receive refunds do to get their money back faster. Electing a less frequent period is restricted. The CRA notes that the reporting period does not change automatically when revenue drops, so you may need to ask.

Annual filers whose net tax is above a threshold must pay quarterly instalments; check the CRA's instalment rules for annual filers for the current threshold.

What each return involves for your bookkeeper

1. Confirm all sales for the period are recorded with the correct tax code (HST at the right provincial rate, GST only, zero-rated or exempt).
2. Confirm purchases claimed as input tax credits have the supporting documents required by the Input Tax Credit Information Regulations. The required information depends on the amount: under $100, $100 to under $500, and $500 or more.
3. Reconcile the sales tax accounts in the general ledger to the return.
4. Account for adjustments: bad debts, returns, change-in-use, and items such as meals and entertainment, for which only part of the tax is generally claimable.
5. File electronically and pay or record the refund.

Steps 1 to 3 are where automation helps most, and also where automation errors appear. See automation errors and input tax credits.

Illustrative workload and fee comparison

Assume a bookkeeper needs about 1.5 hours to prepare and file a quarterly return for a tidy corporation, and the year end includes an extra hour to reconcile the annual sales tax position.

• Annual filer: about 3 hours a year (more work per return, but only one) = 3 x $70 = $210
• Quarterly filer: 4 x 1.5 + 1 = 7 hours = 7 x $70 = $490
• Monthly filer: 12 x 1.2 + 1 = 15.4 hours = 15.4 x $70 = $1,078

The hourly rate and times are illustrative. The point is the shape: frequency multiplies the fixed part of each return. Filing more often than required can still be worth it if it brings refunds in sooner or keeps the books current.

The Quick Method and simplified ITCs

Eligible small businesses with annual taxable supplies of $400,000 or less (including associates) may elect the Quick Method, remitting a set percentage of tax-included sales instead of tracking input tax credits on most expenses. It can reduce bookkeeping time, but whether it saves tax depends on your margin and expenses. The CRA publishes the remittance rates by province and business type. Ask your accountant to compare both methods on last year's figures before electing.

Quebec: GST and QST together

In Quebec, Revenu Québec generally administers the GST/HST as well as the QST for businesses located in the province, so most Quebec corporations file both returns with Revenu Québec. The QST rate is 9.975% on top of the 5% GST. Quebec businesses keep separate QST registration numbers, and supplier invoices need both numbers for full input tax credits and input tax refunds. More in the Quebec differences guide.

Penalties for filing late

For GST/HST, the late-filing penalty under section 280.1 of the Excise Tax Act is 1% of the amount owing plus 0.25% of that amount for each complete month the return is late, up to 12 months, so up to 4% in total, with interest on top. Details are in late-filing penalties for T2 and GST/HST.

Return dates for each reporting period are listed in the 2026 filing calendar, and how a bookkeeper prices each return is covered in bookkeeping pricing models.

Frequently asked questions

Can I switch from quarterly to annual if sales drop?

Only if you meet the conditions for the less frequent period, and generally after a waiting period. You usually have to ask the CRA (or Revenu Québec in Quebec).

Does my accountant charge for nil returns?

Often, though less. A nil return still has to be filed on time if you are registered.

Do accounting fees themselves include GST/HST?

Yes, accounting services are taxable supplies. A registered corporation can generally claim the tax as an input tax credit.

Sources

• Canada Revenue Agency — GST/HST registration, reporting periods, Quick Method and input tax credits
• Revenu Québec — QST and GST administration in Quebec
• Justice Laws Website — Excise Tax Act and the Input Tax Credit Information (GST/HST) Regulations