The $30,000 small-supplier threshold
The CRA-published rule defines a small supplier as a person whose total worldwide taxable supplies (including zero-rated supplies) from all businesses are $30,000 or less over any single calendar quarter or over the four most recent consecutive calendar quarters[1]. A self-employed real estate agent whose commission income stays at or under that threshold over a rolling four-quarter window remains a small supplier and is not required to register for GST/HST[1].
The threshold is measured against taxable supplies — not gross deals, not sale prices, not brokerage splits before the agent's share. For a real estate agent, the relevant figure is the agent's own commission income (the service fee paid to the agent for the real estate service)[1].
Three mechanical details on how the threshold is applied:
- Rolling, not calendar. The four-quarter window is the four most recent consecutive calendar quarters, recomputed each quarter — not a fixed January-to-December window[1].
- Single-quarter trigger. A single calendar quarter that exceeds $30,000 on its own ends small-supplier status immediately, even if the trailing four-quarter total is under $30,000[1].
- Common first-trigger pattern. Real estate commissions often arrive in concentrated bursts. The threshold can be crossed by a single residential resale closing or by the sum of two or three closings in one quarter.
Crossing $30,000 in revenue is the mechanical event that ends small-supplier status and activates registration obligations — described in the next section[1].
Registering: voluntary vs. mandatory
CRA describes two routes into the GST/HST system: voluntary registration while the agent is still a small supplier, or mandatory registration once the threshold is crossed[1][2].
Mandatory registration timing
When taxable revenues exceed $30,000 in a single calendar quarter, small-supplier status ends immediately on the supply that pushed the total past $30,000. GST/HST applies to that supply and to every supply afterwards, and the registration application is due within 29 days of that supply[1].
When taxable revenues exceed $30,000 over four consecutive calendar quarters (without any single quarter exceeding $30,000), the small-supplier exception expires at the end of the month following the quarter in which the threshold was crossed. From that point forward, GST/HST applies to all taxable supplies and registration is due within 29 days of the first taxable supply made after that grace month[1].
An agent who collects commission past the date small-supplier status ended without having registered remains liable for the GST/HST on those supplies. CRA can assess the unremitted tax retroactively against the agent — even if the brokerage paid the commission as a flat amount with no GST/HST line item[1].
Voluntary registration
A small supplier may register voluntarily before reaching the $30,000 threshold[1]. Voluntary registration opens access to Input Tax Credits (described in the next section) but also requires the agent to charge GST/HST on taxable supplies, file returns on the assigned schedule, and remit collected tax[1][5].
How registration is completed
CRA provides several published channels for opening a GST/HST account[2]:
- Business Registration Online (BRO) — the CRA self-serve portal. Most common path for individuals who already have a Business Number[2].
- By phone — the CRA Business enquiries line[2].
- By mail or fax — using Form RC1, Request for a Business Number and Certain Program Accounts[2].
The result is a 9-digit Business Number (BN) plus a GST/HST program identifier (RT0001), e.g. 123456789 RT0001[2]. This is the number the agent uses on commission invoices and on the GST34 return.
Input Tax Credits (ITCs)
Once registered, a real estate agent collects GST/HST on taxable commissions and pays GST/HST on most business expenses. The mechanism that links the two is the Input Tax Credit — the credit a registrant claims for GST/HST paid on qualifying expenses incurred to make taxable supplies[4].
On each GST/HST return, the registrant calculates net tax as GST/HST collected on taxable sales minus ITCs claimed on eligible expenses. The remitted figure is the difference[4][5].
CRA's published ITC eligibility rules require that the expense[4]:
- Be acquired or imported for consumption, use, or supply in the course of the registrant's commercial activities;
- Be supported by adequate documentation showing the supplier, the supplier's GST/HST registration number, the date, the amount of GST/HST paid or payable, and a description of the supply;
- Be claimed within the time limit specified in the Excise Tax Act (generally four years for most registrants).
Common business categories where a real estate agent may incur GST/HST that becomes eligible for an ITC include[4]:
- Brokerage desk fees and association dues that include GST/HST
- Marketing and advertising — listing photography, signage, paid digital ads where the supplier charges GST/HST
- Technology subscriptions used for the business — CRM software, financial-tracking platforms (such as Agent Runway), MLS-adjacent tooling
- Office supplies, stationery, business cards
- Professional fees — accountant, lawyer, consultant
- Vehicle expenses — fuel, repairs, leases — pro-rated to the business-use portion of total kilometres driven
- Cell phone and internet — pro-rated to business use
Some expenses are subject to specific limitations. Meals and entertainment are generally limited to 50% of the GST/HST paid for ITC purposes, mirroring the income-tax limitation[4]. Personal-use portions of mixed-use expenses are not eligible for ITCs[4].
HST/GST rates by province
The applicable rate is determined by the place of supply rules — for a real estate agent, generally the province where the real property is located[3]. Five provinces use a harmonized rate (HST) that combines the federal and provincial portions into a single tax. Five provinces and three territories use only the federal 5% GST, with provincial sales tax (PST or RST) administered separately where applicable[3]. Quebec uses the 5% federal GST plus the QST, administered by Revenu Québec[3].
| Province / Territory | Rate | Type |
|---|---|---|
| Alberta | 5% | GST |
| British Columbia | 5% | GST (PST administered separately) |
| Manitoba | 5% | GST (RST administered separately) |
| New Brunswick | 15% | HST |
| Newfoundland and Labrador | 15% | HST |
| Nova Scotia | 15% | HST |
| Ontario | 13% | HST |
| Prince Edward Island | 15% | HST |
| Quebec | 5% + QST | GST + QST (Revenu Québec) |
| Saskatchewan | 5% | GST (PST administered separately) |
| Northwest Territories, Nunavut, Yukon | 5% | GST |
Rates published by CRA, current as of the article date. Provincial sales taxes (PST in BC and SK, RST in MB) and the QST in Quebec are administered separately by the relevant provincial revenue agencies and are outside the GST/HST return[3].
For an agent licensed in a single province, the rate to charge on commissions is the rate for that province. An agent who represents a buyer or seller on a property located in a different province from where the agent is registered applies the rate of the province where the property is located, per the place-of-supply rules for real property services[3].
Taxable vs. exempt: the residential commission rule
A point of frequent confusion: the sale of a used residential property is an exempt supply under Schedule V, Part I of the Excise Tax Act — the seller does not charge GST/HST on the sale price[6]. But the real estate agent's commission is a separate supply: a service rendered by the agent to the client, which is a taxable supply [1][6].
The two transactions are taxed differently because they are two different supplies. The residential property changing hands between buyer and seller is exempt; the brokerage service the agent provides is taxable. GST/HST applies to the commission regardless of whether the underlying property sale is itself exempt[1][6].
The mechanics applied to the most common categories of services a real estate agent provides:
- Commission on a residential resale. The property sale is exempt; the agent's commission is taxable[1][6].
- Commission on a new-build residential sale. The new-build sale is taxable to the buyer (with new housing rebate mechanics outside the scope of this article); the agent's commission is also taxable[1].
- Commission on a commercial property sale or lease. Commercial real property sales and leases are generally taxable supplies; the agent's commission is taxable[1][6].
- Referral fees received from another registered agent. Fees paid to a real estate agent for a referral of business are generally taxable supplies of a service[1].
The practical effect: a registered agent charges GST/HST on substantially every commission cheque, whether the underlying property is residential, new-build, or commercial. The exempt-supply status of a used residential property does not flow through to the brokerage service[1][6].
Get the Canadian Realtor Tax Cheat Sheet
Every 2025 bracket, CPP rate, GST/HST threshold, and instalment due date on one printable page — CRA-cited. We'll email it to you.
Email me the cheat sheet, and add me to occasional Agent Runway updates for Canadian real estate agents. Unsubscribe anytime. Sent by Agent Runway Inc., Saint John, NB, Canada.
Filing frequency and the GST34 return
CRA assigns each registrant a reporting period — annual, quarterly, or monthly — based on threshold revenue (taxable supplies plus zero-rated supplies, before expenses)[5]. The published thresholds are[5]:
- Annual filing — assigned by default when threshold revenue is $1,500,000 or less[7].
- Quarterly filing — assigned by default when threshold revenue is more than $1,500,000 up to $6,000,000[7].
- Monthly filing — required when threshold revenue is more than $6,000,000[7].
Most self-employed real estate agents fall into the annual filing category. CRA permits a registrant to elect a more frequent reporting period than the assigned default — for example, a registrant with annual revenue of $400,000 may elect quarterly or monthly filing[5].
The GST34 return and due dates
The form used to file is the GST34, which CRA mails or makes available electronically based on the registrant's reporting period[5]. Filing due dates depend on reporting period[5]:
- Annual filers (non-individual fiscal year-end) — return and payment due 3 months after fiscal year-end[5].
- Annual filers (individual with December 31 year-end who is self-employed) — return due June 15; any net tax owing due April 30[5]. The split matches the T1 self-employed filing schedule.
- Quarterly and monthly filers — return and payment due one month after the end of the reporting period[5].
CRA also requires annual filers whose net tax for the previous year was $3,000 or more to make quarterly GST/HST instalment payments through the year, with the annual return reconciling the total[5]. These instalments are separate from personal income-tax instalments described in the tax instalments article.
Returns are filed electronically through CRA My Business Account, GST/HST NETFILE, or through certified third-party software[5].
Tracking through the year
The mechanical work of being GST/HST-registered breaks into three repeating activities through the year: collecting on invoices, tracking ITCs, and remitting on the assigned reporting period[1][4][5].
On the collection side, GST/HST appears as a separate line on each commission invoice. Brokerages that handle the agent's commission documentation typically apply the registered agent's number on the trust-fund disbursement; agents who invoice independently include their own BN+RT0001 on each invoice[2].
On the ITC side, the documentation requirements published by CRA — supplier name, supplier's GST/HST registration number, date, amount of tax, and description of the supply — are easier to satisfy when expense receipts are categorized as they are incurred rather than reconstructed at year-end[4].
Agent Runway's expense module flags GST/HST paid on each categorized expense, separating the tax from the pre-tax amount. As the year progresses, the platform aggregates the GST/HST collected (from closed transactions) and the GST/HST paid (from categorized expenses), producing a running estimate of net tax owing on the next GST34 return — useful for approximating the figure that will appear on a quarterly instalment or annual filing.
Other tax surfaces — quarterly income-tax instalments, deductible expense categorization on T2125, CPP contributions, and the choice between sole proprietor and PREC structures — are explored in the broader Canadian real estate agent tax planning guide.