Bookkeeping for Canadian Firms: GST/HST Details Offshore Teams Must Know

GST/HST is Canada's federal value-added tax, charged at 5% on its own or as a blended rate of 13% to 15% in the five harmonized provinces. 

Three details drive almost every posting decision for an offshore bookkeeping team: place of supply sets the rate, not the client's head office. Input tax credits require prescribed invoice information including the supplier's registration number; and exempt supplies are treated very differently from zero-rated ones. 

Get those three right and most GST/HST reconciliation breaks disappear before they reach the return.

Key Takeaways

• GST is 5% federally. HST is 13% in Ontario, 14% in Nova Scotia (down from 15% on April 1, 2025), and 15% in New Brunswick, Newfoundland and Labrador, and Prince Edward Island.
• British Columbia, Saskatchewan and Manitoba add a separate provincial tax to the 5% GST. Quebec adds 9.975% QST, filed with Revenu Quebec.
• Registration is mandatory once taxable supplies exceed $30,000 over four consecutive calendar quarters.
• The supplier's GST/HST number is mandatory support for input tax credits at $30 and above.
• Zero-rated supplies are taxed at 0% and still allow input tax credits. Exempt supplies do not.
• Nearly all registrants must file electronically for periods ending in 2024 and later.

What Is GST/HST, and Why Do Offshore Teams Get It Wrong?

The Goods and Services Tax is a 5% federal value-added tax on most goods and services sold in Canada, administered by the Canada Revenue Agency. Five provinces folded their provincial retail tax into it, producing the Harmonized Sales Tax: one blended rate, one registration, one return.

Offshore bookkeepers with a VAT background usually grasp the input-output mechanics immediately. What catches them is that Canada is not one rate. It is thirteen jurisdictions with four different tax structures, and the rate depends on where the supply is made, not where the client's office sits. A Vancouver client invoicing a Toronto customer charges 13%, not 5%. Posting that at the client's home rate creates a variance that surfaces only at filing time.

For firms looking to Hire Bookkeeper For Canadian CPA Firms, working with professionals who understand Canadian GST/HST requirements can help improve transaction accuracy and reduce compliance risks. The right bookkeeping support can also help CPA firms manage provincial tax differences and maintain accurate records throughout the reporting cycle.

What Are the Current GST/HST Rates by Province?

Rates in effect for 2026:

• Alberta, Northwest Territories, Nunavut, Yukon: 5% GST only
• British Columbia: 5% GST + 7% PST
• Saskatchewan: 5% GST + 6% PST
• Manitoba: 5% GST + 7% RST
• Ontario: 13% HST
• Nova Scotia: 14% HST (reduced from 15% effective April 1, 2025)
• New Brunswick, Newfoundland and Labrador, Prince Edward Island: 15% HST
• Quebec: 5% GST + 9.975% QST, administered by Revenu Quebec

Two points matter operationally. PST, RST and QST are calculated on the pre-tax price, not stacked on GST. And PST and RST are never recoverable as input tax credits: they belong in the expense account, not the tax receivable. Teams that have only worked HST files regularly get this wrong on their first British Columbia or Manitoba client.

When Does a Canadian Client Have to Register for GST/HST?

Registration is mandatory once a business stops being a small supplier, which happens when worldwide taxable supplies exceed $30,000 over four consecutive calendar quarters. The timing rule is where bookkeepers slip:

• Crossed within a single calendar quarter: registration is effective from that supply, and tax must be charged on it.
• Crossed across four consecutive quarters: small supplier status runs one more month, after which registration is required.

Voluntary registration is common for firms with significant input tax credits, and Quebec requires a separate QST registration. 

How Do Place-of-Supply Rules Decide the Rate?

The rate follows the customer, not the seller.

• Goods: the province where they are delivered or made available to the customer.
• Services: generally the recipient's home or business address obtained in the ordinary course of business. With more than one address, use the one most closely connected to the supply.
• Intangible property: where the property can be used, plus the recipient's address.

The customer master file therefore needs a reliable province field, and invoice tax codes should follow that field rather than a client-level default.

What Does an Input Tax Credit Actually Require?

A registrant recovers GST/HST paid on purchases used in commercial activity, but only with supporting information meeting the CRA's prescribed tiers:

• Under $30: supplier or intermediary name, invoice date, and total amount.
• $30 to $149.99: the above, plus the supplier's GST/HST registration number and either the tax amount or a statement that the total includes tax.
• $150 and over: the above, plus the recipient's name, terms of payment, and a description sufficient to identify the supply.

A credit card statement line carries no registration number, so it is not adequate support at $30 or more. Claiming from statements rather than invoices is one of the fastest ways to lose input tax credits on audit. Most registrants then have four years to claim; those with more than $6 million in annual taxable supplies and listed financial institutions have two.

Zero-Rated or Exempt? The Difference Changes the Claim

This distinction decides whether input tax credits survive, and it has no clean equivalent in most other VAT systems.

Zero-rated (taxed at 0%): basic groceries, prescription drugs, most medical devices, exports, and most agricultural and fishery products. Report the sale, charge no tax, and still claim input tax credits on related costs.

Exempt (outside the tax entirely): long-term residential rent, most financial services, most health and dental services, childcare, and most educational services. No tax is charged, and no input tax credits are available on the related inputs.

Clients making both taxable and exempt supplies need input apportionment, which is a judgment call for the Canadian firm rather than a decision for the offshore ledger.

Clear offshore accounting processes can help maintain accurate records and properly categorize transactions, while the Canadian CPA firm retains responsibility for tax treatment and final input tax credit decisions.

What Are the Reporting Periods and Deadlines?

Reporting frequency is set by annual taxable supplies:

• $1.5 million or less: annual, with the option to elect quarterly or monthly
• Over $1.5 million to $6 million: quarterly
• Over $6 million: monthly

Monthly and quarterly filers file and pay within one month of period end. Annual filers generally have three months after fiscal year end, except individuals with business income and a December 31 year end, who file by June 15 with payment due April 30. Annual filers with prior-year net tax over $3,000 also make quarterly instalments.

Electronic filing is mandatory for all registrants other than charities and selected listed financial institutions, for periods ending in 2024 and later. The penalty is $100 for the first paper return and $250 for each one after. Remittances of $10,000 or more must also be electronic. On the return itself, line 101 is sales and other revenue, line 105 total GST/HST collected, line 108 total input tax credits, and line 109 net tax.

Best Practices for Offshore Bookkeeping Teams

• Make province a required field on every customer and vendor record, and drive tax codes from it.
• Lock a per-client tax code library mapped to province and supply type, and restrict who can add codes.
• Reconcile line 101 to trial balance revenue and the GST/HST payable control account to the return every period.
• Escalate first-time transaction types: intercompany charges, imported services, construction holdbacks, and bad debt adjustments.
• Store source invoices in a searchable index, since input tax credit support has to survive an audit years later.
• Build a review buffer into the calendar. CRA deadlines are Canadian dates.

Common GST/HST Mistakes to Avoid

• Applying 15% to Nova Scotia invoices dated on or after April 1, 2025.
• Claiming PST, RST or QST as an input tax credit on the GST/HST return.
• Supporting input tax credits with credit card statements that carry no registration number.
• Treating exempt revenue as zero-rated and claiming input tax credits against it.
• Applying the client's home province rate to out-of-province customers.

Conclusion

GST/HST is not difficult once the logic is clear, but it is unforgiving of assumptions carried over from other tax systems. Three habits separate a reliable offshore bookkeeper from an expensive one: check the province before the rate, check the invoice before the input tax credit, and check whether the supply is exempt before claiming against it.

MYCPE ONE builds offshore bookkeeping teams for Canadian CPA and accounting firms with that grounding already in place, so your staff arrive knowing the provincial rate map, the input tax credit documentation tiers, and the CRA filing calendar instead of learning them on your client files.

Frequently Asked Questions

What is the difference between GST and HST?

GST is the 5% federal tax applied across Canada. HST is a blended rate combining that 5% with a provincial portion in Ontario, Nova Scotia, New Brunswick, Newfoundland and Labrador, and Prince Edward Island. Both are administered by the CRA and reported on the same return.

What is the current HST rate in Nova Scotia?

14%, after the provincial portion was reduced from 10% to 9% effective April 1, 2025. Invoices dated before that still use 15%.

When does a business have to register for GST/HST?

Once worldwide taxable supplies exceed $30,000 over four consecutive calendar quarters. Crossing the threshold within a single quarter triggers registration immediately from that supply.

Can you claim an input tax credit without the supplier's GST/HST number?

Only for purchases under $30. At $30 and above, the registration number is prescribed information and the claim is not properly supported without it.

Is QST filed on the same return as GST/HST?

No. Quebec Sales Tax is administered by Revenu Quebec and requires separate registration and reporting. Businesses located in Quebec generally file their GST/HST with Revenu Quebec as well.

Can an offshore team file GST/HST returns with the CRA?

Offshore bookkeepers routinely prepare returns and reconciliations. Filing runs through the Canadian firm's authorized representative access, and the firm remains responsible. Access, data handling and PIPEDA privacy obligations should be documented before offshore staff touch client data.