GST/HST Guide: Everything Canadian Businesses Need to Know
Registration, filing methods, input tax credits, the Quick Method, real property rules and place of supply. Every rate, rule, deadline and strategy in one comprehensive guide. Written by a licensed CPA.
What This Guide Covers
1. How GST/HST Works in Canada 2. GST/HST Rates by Province (2026) 3. GST/HST Registration 4. Filing Methods and Deadlines 5. Input Tax Credits (ITCs) 6. The Quick Method 7. GST/HST and Real Property 8. Place of Supply Rules 9. Special Situations 10. Frequently Asked Questions1. How GST/HST Works in Canada
The Goods and Services Tax (GST) is a federal value-added tax of 5% that applies to most goods and services sold in Canada. In provinces that have harmonized their provincial sales tax with the GST (Ontario, Nova Scotia, New Brunswick, Newfoundland, PEI), the combined rate is called the Harmonized Sales Tax (HST). In non-harmonizing provinces (British Columbia, Saskatchewan, Manitoba, Quebec), the GST applies separately from the provincial sales tax (PST, RST or QST).
As a business owner, you are the tax collector. You collect GST/HST on your sales (output tax), pay GST/HST on your purchases (input tax) and remit the difference to CRA. If you pay more in GST/HST on purchases than you collect on sales (common for exporters, startups and capital-intensive businesses), CRA refunds the difference to you. GST/HST Filing Services →
2. GST/HST Rates by Province (2026)
| Province | GST | Provincial | Combined Rate | Tax Type |
|---|---|---|---|---|
| Ontario | 5% | 8% | 13% | HST (harmonized) |
| British Columbia | 5% | 7% PST | 12% (separate) | GST + PST |
| Alberta | 5% | 0% | 5% | GST only |
| Quebec | 5% | 9.975% QST | 14.975% (separate) | GST + QST |
| Manitoba | 5% | 7% RST | 12% (separate) | GST + RST |
| Saskatchewan | 5% | 6% PST | 11% (separate) | GST + PST |
| Nova Scotia | 5% | 10% | 15% | HST |
| New Brunswick | 5% | 10% | 15% | HST |
| Newfoundland | 5% | 10% | 15% | HST |
| PEI | 5% | 10% | 15% | HST |
3. GST/HST Registration
The $30,000 Threshold
GST/HST registration becomes mandatory when your worldwide taxable revenue exceeds $30,000 in a single calendar quarter or in four consecutive calendar quarters. Once you exceed the threshold, you have 29 days to register. From the effective date, you must charge GST/HST on all taxable supplies and begin filing returns.
| Revenue Type | Counts Toward $30,000? | Examples |
|---|---|---|
| Taxable supplies at 5%, 13% or 15% | Yes | Consulting fees, product sales, restaurant revenue, construction. |
| Zero-rated supplies at 0% | Yes | Exports, SaaS to US clients, basic groceries. Rate is 0% but revenue counts. |
| Exempt supplies | No | Medical services, financial services, long-term residential rent, childcare. |
| Sale of capital property | No (generally) | Selling equipment or a building (unless that is the primary business). |
| Revenue from associated persons | Aggregated | Two corporations controlled by the same person: combined revenue tested against $30,000. |
Voluntary Registration
Most businesses should register voluntarily at incorporation, even if revenue is below $30,000. Voluntary registration allows you to claim input tax credits (ITCs) on all business purchases from day one. Without registration, every dollar of GST/HST you pay on expenses is a sunk cost.
| Scenario | Without Registration | With Voluntary Registration |
|---|---|---|
| $20,000 in startup expenses | Pay $2,600 HST. Cannot recover. | Claim $2,600 ITC. CRA refunds $2,600. |
| $5,000/month ongoing expenses | $650/month HST lost. $7,800/year. | Claim ITC monthly. Recover $7,800/year. |
| US/international clients (zero-rated) | No ITC recovery. No refund mechanism. | Charge 0%. Full ITCs. CRA refund cheques. |
Special Registration Rules
| Business Type | Registration Rule |
|---|---|
| Taxi and ride-share operators | From the first dollar of revenue. No $30,000 threshold. |
| Non-residents selling digital products to Canadians | Simplified registration if Canadian digital sales exceed $30,000. |
| Charities and non-profits | $50,000 threshold (not $30,000). |
Penalties for Failing to Register
| Consequence | Details |
|---|---|
| Retroactive HST assessment | CRA assesses HST that should have been collected. $200,000 revenue at 13%: $26,000. |
| Late filing penalties | 1% of balance + 0.25% per month (max 12 months) per period. |
| Interest | Prescribed rate + 4% compounded daily from each period's due date. |
| Two-year delay example | $200,000/year revenue: $52,000 retroactive HST, ~$2,080 penalties, ~$3,200 interest. ITCs recover ~$15,600. Net cost: ~$41,680. |
4. Filing Methods and Deadlines
| Frequency | Revenue Threshold | Filing Deadline | Payment Deadline |
|---|---|---|---|
| Monthly | Above $6,000,000 (mandatory). By election for any registrant. | Last day of the following month. | Same as filing. |
| Quarterly | $1,500,001 to $6,000,000. By election for smaller registrants. | Last day of the month after the quarter. | Same as filing. |
| Annual | $1,500,000 or less (default). | Corps: 3 months after year-end. Individuals: June 15. | Corps: 3 months after year-end. Individuals: April 30. |
2026-2027 Quarterly Filing Dates
| Quarter | Period | Due Date |
|---|---|---|
| Q1 2026 | January 1 to March 31 | April 30, 2026 |
| Q2 2026 | April 1 to June 30 | July 31, 2026 |
| Q3 2026 | July 1 to September 30 | October 31, 2026 |
| Q4 2026 | October 1 to December 31 | January 31, 2027 |
Choosing the Right Frequency
| Business Profile | Best Frequency | Why |
|---|---|---|
| Consistently receives HST refunds (exports, SaaS, startups) | Monthly | Monthly refund cheques. $60,000/year refund = $5,000/month vs. one cheque after 15 months. |
| Consistently remits HST (services, retail, restaurants) | Annual or quarterly | Less filing work. No cash flow benefit to filing more frequently. |
| Seasonal revenue (tourism, construction, landscaping) | Quarterly | Smooths remittances. Avoids a large annual lump sum during the off-season. |
| Annual filers owing more than $3,000 | Annual with quarterly instalments | File once but pay quarterly. Each instalment is 1/4 of prior year's net tax. Late instalments: interest at prescribed + 4%. |
Switching Frequencies: Request a change through CRA or My Business Account. Takes effect at the start of the next fiscal year. If you consistently receive refunds and are filing annually, switching to monthly is one of the easiest cash flow improvements available. We handle the change request.
5. Input Tax Credits (ITCs)
Input tax credits recover the GST/HST you pay on business purchases. Every dollar of GST/HST paid on a legitimate business expense is claimable, subject to specific restrictions. ITCs reduce the net tax you remit and, if ITCs exceed collections, CRA sends a refund.
ITC Eligibility Rules
| Rule | Details |
|---|---|
| Must be a GST/HST registrant | Only registered businesses can claim ITCs. |
| Must be for commercial activity | Purchases for personal use or exempt activities do not qualify. |
| Documentation required | Under $30: no receipt required. $30 to $150: simplified invoice (supplier name, HST rate, date, total). Over $150: full invoice with supplier GST/HST registration number. |
| Time limit | Revenue over $6M: 2 years. All others: 4 years from the return due date. |
Common ITCs and Restrictions
| Expense | ITC | Restriction |
|---|---|---|
| Rent (commercial) | 100% | Full ITC. Residential rent exempt (no GST charged). |
| Equipment and machinery | 100% | Full ITC in period of purchase. No declining balance. |
| Office supplies, software, internet | 100% | Full ITC if used for commercial activity. |
| Professional fees (accounting, legal) | 100% | Full ITC. |
| Advertising and marketing | 100% | Full ITC on HST-bearing advertising. |
| Meals and entertainment | 50% | Only 50% claimable. Staff parties (up to 6/year): 100%. |
| Vehicle (passenger) | Business % | Based on logbook business-use percentage. |
| Home office | Business % | ITC on business-use percentage of HST-bearing expenses (internet, utilities). No ITC on mortgage interest or property tax. |
| Club memberships | 0% | No ITC regardless of business purpose. |
| Employee personal benefits | 0% | No ITC on non-taxable employee benefits. |
Commonly Missed ITCs
| Missed ITC | Why Missed | Annual Recovery |
|---|---|---|
| Bank fees and merchant processing | Credit card processing fees include HST. Often overlooked. | $500 to $2,000/year |
| Professional development and conferences | Registration fees, travel for business conferences. | $300 to $1,500/year |
| Subcontractor invoices | HST amount not clearly identified. Bookkeeper does not extract it. | $1,000 to $10,000/year in construction |
| Retroactive ITCs (prior periods) | Overlooked ITCs claimable within the 4-year (or 2-year) limit. | $5,000 to $25,000 for new clients |
We Review Every Expense Category for ITCs: Many businesses leave 5% to 15% of eligible ITCs unclaimed. A business with $200,000 in annual expenses at 13% HST could leave up to $26,000 in ITCs unclaimed. We audit every expense category on every filing. GST/HST Filing Services →
6. The Quick Method
The Quick Method is a simplified way to calculate GST/HST. Instead of tracking ITCs on every purchase, you charge the normal rate (13% in Ontario) but remit a lower percentage of your HST-included revenue to CRA. The difference between what you collect and what you remit is your income.
| Component | Details |
|---|---|
| Eligibility | Annual taxable revenue (including HST) $400,000 or less. Excluded: accountants, lawyers, financial service providers. |
| Election | File Form GST74. Takes effect on the first day of a reporting period. Must stay on for at least 1 year. |
| Service remittance rate (Ontario) | 8.8% of HST-included revenue. You charge 13%, remit 8.8%, keep 4.2%. |
| Goods remittance rate (Ontario) | 4.4% of HST-included revenue. Lower rate for resellers with higher input costs. |
| First $30,000 credit | 1% credit on first $30,000 HST-included revenue each year. Saves ~$300/year. |
| Capital purchase ITCs | You CAN claim ITCs on capital purchases over $30,000 even under the Quick Method. The only ITC allowed. |
Quick Method vs. Regular Method Comparison
| Scenario (Services, Ontario) | Quick Method | Regular Method | Which Saves More? |
|---|---|---|---|
| $150K revenue, $25K expenses | Remit $14,916 | $19,500 minus $3,250 = $16,250 | Quick saves $1,334 |
| $150K revenue, $50K expenses | Remit $14,916 | $19,500 minus $6,500 = $13,000 | Regular saves $1,916 |
| $150K revenue, $80K expenses | Remit $14,916 | $19,500 minus $10,400 = $9,100 | Regular saves $5,816 |
| $200K revenue, $30K expenses | Remit $19,888 | $26,000 minus $3,900 = $22,100 | Quick saves $2,212 |
| $300K revenue, $40K expenses | Remit $29,832 | $39,000 minus $5,200 = $33,800 | Quick saves $3,968 |
Decision Rule
| HST-Bearing Expenses as % of Revenue | Recommendation |
|---|---|
| Under 30% | Quick Method almost always saves money. Consulting, IT, freelancing, cleaning, personal training, tutoring. |
| 30% to 40% | Calculate both methods. Breakeven depends on exact expense mix and province. |
| Above 40% | Regular Method is better. Retail, manufacturing, construction, food service with high material costs. |
7. GST/HST and Real Property
Real property transactions have the most complex GST/HST rules in the entire Excise Tax Act. The treatment depends on whether the property is new or used, residential or commercial, sold or rented and whether the seller is a builder or an individual.
| Transaction | HST Treatment (Ontario) | Key Rules |
|---|---|---|
| Sale of new residential (by builder) | Taxable at 13% | Builder charges HST. Usually embedded in price. Buyer may qualify for New Housing Rebate. |
| Sale of resale residential | Exempt | Used residential property by an individual is exempt. No HST. No ITCs. |
| Sale of commercial property | Taxable at 13% | HST on full sale price. Section 167 election available: buyer self-assesses if both are registrants and buyer uses commercially. |
| Residential rental (30+ days) | Exempt | Long-term residential rent is exempt. No HST. No ITCs for landlord on operating expenses. |
| Short-term rental (under 30 days) | Taxable (above $30K) | Airbnb, VRBO. Must register if above $30,000 revenue. ITCs claimable. |
| Commercial rental | Taxable at 13% | Landlord charges HST. Both parties claim ITCs. Net-neutral if both registrants. |
| Substantial renovation (90%+ interior) | Taxable (treated as new) | HST on sale. New Housing Rebate may apply. |
| Builder self-supply (retains new unit) | Self-assessment required | Builder who does not sell must self-assess HST on fair market value. New Rental Housing Rebate if rented 1+ year. |
New Housing Rebate
| Rebate | Amount | Conditions |
|---|---|---|
| Federal GST rebate | Up to $6,300 | Home under $350,000: full. $350K to $450K: prorated. Above $450K: none. |
| Ontario provincial HST rebate | Up to $24,000 | 75% of 8% Ontario HST. No phase-out. Max at $400,000 home price. |
| New Rental Housing Rebate | Same amounts | For investors who buy new and rent for 1+ year. Filed after tenant moves in. |
Section 167 Election (Commercial)
| Requirement | Details |
|---|---|
| Both parties registrants | Buyer must be registered for GST/HST. |
| Buyer acquires for commercial use | Not personal use. Not exempt residential rental. |
| Joint election filed | Buyer self-assesses HST on their return. Seller does not collect. |
| Improper use penalty | If buyer does not use commercially: full HST assessed with no ITC. |
The Self-Supply Rule: A builder who constructs a new home and moves in or rents it must self-assess HST on the fair market value. On a $700,000 Ontario home: $91,000 in HST. The builder can claim the New Housing Rebate ($24,000 Ontario) to offset. Missing the self-assessment: CRA reassesses the full $91,000 plus penalties and interest. Real Estate Accountant →
8. Place of Supply Rules
When you sell goods or services across provincial borders, the place of supply rules determine which province's tax rate applies. In Ontario (13%), selling to a customer in Alberta (5% GST only) means you charge 5%, not 13%.
| Supply Type | Place of Supply Rule | Examples |
|---|---|---|
| Goods shipped | Province where delivered. | Ontario ships to Alberta: 5%. Ships to Nova Scotia: 15%. Ships to Ontario: 13%. |
| Goods picked up | Province where picked up. | Alberta buyer picks up in Ontario: 13%. |
| Services (general) | Province where primarily performed. | 80% in Ontario, 20% in Alberta: 13% HST. |
| Services (specific location) | Province where work is done. | Ontario plumber doing repairs in Nova Scotia: 15%. |
| Digital products | Province where buyer is located. | Ontario SaaS to Alberta customer: 5%. To NB customer: 15%. |
| Real property | Province where property is located. Always. | Toronto investor selling in Halifax: 15%. |
| Exports (outside Canada) | Zero-rated (0%) | Goods or services to non-residents outside Canada. Full ITCs claimable. |
Interprovincial Sales: Worked Examples
| Seller | Buyer | Supply Type | Rate |
|---|---|---|---|
| Ontario | Alberta | E-commerce (shipped) | 5% GST |
| Ontario | Nova Scotia | E-commerce (shipped) | 15% HST |
| Alberta | Ontario | Consulting (performed in Ontario) | 13% HST |
| Ontario | BC | SaaS subscription | 5% GST (PST separate) |
| Ontario | Quebec | Goods shipped | 5% GST (QST separate) |
| Ontario | United States | Any | 0% (zero-rated) |
Export Revenue Produces HST Refunds: If your business sells primarily to US or international clients, all revenue is zero-rated. Charge 0% but claim full ITCs on Canadian expenses. A SaaS company with $300,000 US revenue and $80,000 Canadian expenses recovers $10,400/year. File monthly for monthly refund cheques.
9. Special Situations
| Situation | GST/HST Treatment |
|---|---|
| Exempt supplies (medical, financial, educational) | No GST/HST charged. No ITCs on related expenses. Mixed taxable/exempt: ITCs apportioned. |
| Zero-rated supplies (exports, basic groceries, prescription drugs) | 0% GST. Full ITCs claimable. Best outcome: no tax collected, full recovery on inputs. |
| Mixed-use property or expenses | ITC proportional to commercial use percentage. Vehicle 70% business: 70% ITC. |
| Bad debts | If you charged GST/HST and the customer does not pay, claim back the GST/HST on the bad debt. |
| Foreign currency transactions | Convert to Canadian dollars using the exchange rate on the date of supply. GST/HST on the CAD equivalent. |
| Imported goods | GST/HST paid at the border (CBSA). Claim as ITC on the next return. Fully recoverable. |
| Imported services (reverse charge) | Canadian business must self-assess GST/HST on services from non-registered non-residents. |
Frequently Asked Questions: GST/HST for Canadian Businesses
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