A GST return is the report a registered business files with the Canada Revenue Agency (CRA) to declare the Goods and Services Tax (GST) it collected on sales, the input tax credits (ITCs) it claims on expenses, and the net amount it owes or is refunded. If your Canadian taxable revenue tops CAD 30,000, filing is mandatory. This guide covers rates, registration, deadlines, and penalties, verified against live CRA pages as of July 2026.
What Is a GST Return in Canada?
A GST return is the report a registered business files with the Canada Revenue Agency (CRA) to declare Goods and Services Tax (GST) and Harmonized Sales Tax (HST) collected on sales (output tax), input tax credits (ITCs) claimed on expenses, and the net amount owed or refunded. GST is Canada’s 5% federal value-added tax applied to most goods and services.
Businesses act as intermediaries. They collect GST/HST for the CRA and remit the difference after credits. Every registrant receives a Business Number (BN), a nine-digit CRA identifier, plus an RT program account for GST/HST in the format 123456789 RT0001. HST is the combined federal-plus-provincial tax filed on the same CRA return as GST.
Who Needs to Register for GST/HST in Canada?
Registration is mandatory once worldwide taxable revenue exceeds CAD 30,000 over four consecutive calendar quarters, or in a single calendar quarter. The test measures gross taxable revenue, not profit. Businesses below the threshold are “small suppliers” and can register voluntarily. Charities, taxi operators, and non-residents follow separate rules shown below.
| Registration trigger | Rule | Source |
|---|---|---|
| Four-quarter test | Register once taxable supplies exceed CAD 30,000 over four consecutive calendar quarters; apply within 29 days of losing small-supplier status | CRA when to register |
| Single-quarter test | Small-supplier status ends immediately on the sale that pushes taxable supplies over CAD 30,000 in one quarter | CRA small suppliers (RC2-2) |
| Charities and public institutions | CAD 50,000 taxable-supplies test, plus a CAD 250,000 gross-revenue test | CRA small suppliers (RC2-2) |
| Taxi and ride-share operators | Must register regardless of revenue | CRA when to register |
| Non-residents (digital economy) | Must register once sales exceed CAD 30,000 over 12 months under the simplified regime | CRA digital economy rules |
Should you register voluntarily below the threshold?
Yes, small suppliers can register voluntarily, per CRA guidance. Voluntary registration lets you claim ITCs on business inputs and signals an established operation to business-to-business (B2B) clients. The trade-off is that you must then charge GST/HST and file returns on schedule.
What Is the GST Rate in Canada by Province?
Federal GST is 5%. Combined rates range from 5% in Alberta and the territories to 15% in most HST provinces, with Nova Scotia at 14% effective April 1, 2025. The rate you charge follows the customer’s province under place-of-supply rules. The table below is verified against the CRA GST/HST rates page (last updated April 8, 2026) and companion calculator.
Combined sales tax rates, as of July 2026. Source: CRA GST/HST rates.
| Province/Territory | Type | Total rate | Breakdown |
|---|---|---|---|
| Alberta | GST only | 5% | 5% GST |
| British Columbia | GST + PST | 12% | 5% GST + 7% PST |
| Manitoba | GST + RST | 12% | 5% GST + 7% RST |
| Saskatchewan | GST + PST | 11% | 5% GST + 6% PST |
| Ontario | HST | 13% | 5% federal + 8% provincial |
| Quebec | GST + QST | 14.975% | 5% GST + 9.975% QST |
| New Brunswick | HST | 15% | 5% federal + 10% provincial |
| Nova Scotia | HST | 14% | 5% federal + 9% provincial |
| Prince Edward Island | HST | 15% | 5% federal + 10% provincial |
| Newfoundland and Labrador | HST | 15% | 5% federal + 10% provincial |
| Northwest Territories | GST only | 5% | 5% GST |
| Yukon | GST only | 5% | 5% GST |
| Nunavut | GST only | 5% | 5% GST |
Nova Scotia cut its HST from 15% to 14% on April 1, 2025, dropping the provincial portion from 10% to 9% while the federal 5% stayed fixed, per CRA GST/HST Notice 342. Provincial sales tax rates (BC 7% PST, SK 6% PST, MB 7% RST, QC 9.975% QST) come from the CRA GST/HST calculator page.
What Is the Difference Between GST, HST, PST, and QST?
GST and HST are filed together on one CRA return. Provincial Sales Tax (PST) in British Columbia, Saskatchewan, and Manitoba is registered and filed separately with each province. Quebec Sales Tax (QST) is administered by Revenu Qu\u00e9bec on its own return. Mixing these systems is the most common Canadian sales tax error.
| Tax | Where it applies | Administering authority | Return |
|---|---|---|---|
| GST | Nationwide (5%) | Canada Revenue Agency | GST/HST return |
| HST | ON, NB, NS, PE, NL | Canada Revenue Agency | GST/HST return |
| PST | BC, SK, MB (RST) | Each province’s tax authority | Separate provincial return |
| QST | Quebec | Revenu Qu\u00e9bec | Separate QST return |
How Do You File a GST Return in Canada?
Register for a GST/HST number, charge the correct rate by place of supply, track output tax and ITCs, calculate your net tax, choose an electronic filing method with the CRA, review your figures, then remit payment or claim your refund. Electronic filing is mandatory for most registrants. The seven steps below preserve the full process.
Step 1: Register for a GST/HST number
Register through CRA Business Registration Online, phone, mail, or fax. You receive a Business Number (BN) plus an RT program account (123456789 RT0001) that lets you charge tax and file returns.
Step 2: Charge the correct rate based on place of supply
Charge the rate of the customer’s province, not your own, under CRA place-of-supply rules. This matters most for e-commerce and multi-province sellers, where a single hardcoded rate over- or undercharges out-of-province customers.
Step 3: Track output tax, ITCs, and records
Keep sales invoices, purchase receipts, and transaction summaries every period. ITCs require specific documentation that scales with the purchase amount, detailed in the input tax credits section below.
Step 4: Calculate net tax
Net tax equals GST/HST collected minus ITCs claimed. A positive figure means you owe the CRA. A negative figure means you claim a refund.
Step 5: Choose a filing method and complete the return
The CRA offers GST/HST NETFILE, My Business Account, GST/HST TELEFILE, and financial institution/EDI (Electronic Data Interchange), per the CRA file-a-return page. Electronic filing is mandatory for most registrants for fiscal periods beginning in 2024, with narrow exceptions such as some charities and selected listed financial institutions. Form GST34 captures total sales, GST/HST collected, ITCs, and adjustments.
Step 6: Review and submit
Check your reporting period, figures, and calculations before submitting. The most common errors are wrong-period amounts and missed ITCs.
Step 7: Remit payment or claim your refund
Pay through the CRA portal or online banking. If ITCs exceed tax collected, claim your refund. Save the confirmation for your records.
What Is the Quick Method of Accounting for GST?
The Quick Method lets eligible small businesses remit a fixed percentage of their GST/HST-included sales instead of tracking every ITC. Businesses with CAD 400,000 or less in annual taxable supplies can elect it, per CRA guide RC4058 (Quick Method of Accounting for GST/HST). It simplifies compliance but is not always the lower-tax choice.
Run the numbers before electing. Businesses with heavy taxable inputs often recover more by claiming actual ITCs, while service businesses with few inputs tend to benefit from the Quick Method.
How Often Do You File GST Returns in Canada?
The CRA assigns your reporting period by annual taxable supplies, and you can elect a more frequent period. Smaller filers default to annual; larger filers file quarterly or monthly. Refund-position businesses such as exporters often elect frequent filing to accelerate refunds.
| Annual taxable supplies | Default period | Can elect | Source |
|---|---|---|---|
| CAD 1.5M or less | Annual | Quarterly or monthly | CRA reporting periods |
| Over CAD 1.5M to CAD 6M | Quarterly | Monthly | CRA reporting periods |
| Over CAD 6M | Monthly | None more frequent | CRA reporting periods |
Annual filers must pay quarterly instalments when net tax for the year is CAD 3,000 or more, per CRA instalment rules.
When Are GST Returns Due in Canada?
Monthly and quarterly filers owe the return and payment one month after the period ends. Most annual filers owe both three months after their fiscal year-end. Sole proprietors with a December 31 year-end file by June 15 but must pay by April 30. Payment can fall due before the return.
| Filer type | Return due | Payment due | Source |
|---|---|---|---|
| Monthly or quarterly | One month after period end | One month after period end | CRA due dates |
| Annual (most) | Three months after fiscal year-end | Three months after fiscal year-end | CRA due dates |
| Sole proprietor, Dec 31 year-end | June 15 | April 30 | CRA due dates |
How Do You File a Nil GST Return in Canada?
A nil return reports zero sales and zero ITCs. Registrants must still file it even with nothing to report; skipping it triggers CRA failure-to-file demands and penalties. File it in minutes through GST/HST NETFILE or TELEFILE by entering zeros on each line, per CRA file-a-return guidance.
Dormant and pre-revenue entities are the usual candidates for nil returns. Registration, not activity, creates the filing obligation, so file every assigned period until you deregister.
What Are the Penalties for Late GST Filing in Canada?
The CRA charges a late-filing penalty of 1% of the balance owing plus 25% of that 1% for each full month late, up to 12 months, plus interest at the prescribed rate. Separate penalties apply for failing to file electronically when required and for underreporting amounts.
| Penalty | Amount | Source |
|---|---|---|
| Late filing | 1% of balance owing + 25% of that 1% per full month, up to 12 months (CAD 10,000 owed, 3 months late = CAD 175) | CRA penalties and interest |
| Failure to file electronically when required | CAD 100 first occurrence, CAD 250 each occurrence after | CRA penalties and interest |
| Inaccurate or underreported amounts | 5% of the misreported amount + 1% per month, up to 10% | CRA penalties and interest |
Interest compounds daily on overdue balances, so filing a nil return on time still matters even when no tax is owed.
How Do Input Tax Credits Work in Canada?
Input tax credits (ITCs) let registrants recover the GST/HST paid on business inputs by netting it against tax collected. To claim an ITC you need supporting documentation, and the required details scale with the size of the purchase, per CRA ITC records requirements. Missed ITCs are money left on the table.
| Purchase amount | Required details | Source |
|---|---|---|
| Under CAD 30 | Supplier name, date of invoice, total amount | CRA ITC records |
| CAD 30 to CAD 149.99 | Above, plus GST/HST paid or rate and the supplier’s BN | CRA ITC records |
| CAD 150 or more | Above, plus buyer name, brief description, and terms of sale | CRA ITC records |
What Records Do You Need for GST Compliance and Audits?
The CRA requires registrants to keep supporting records for at least six years, even though nothing is attached to the return. These records prove the figures on your GST34 and are the first thing an auditor requests. Keep the six document types below in an organized, retrievable format.
| Record to keep six years | Purpose | Source |
|---|---|---|
| Sales invoices and receipts | Prove revenue and GST/HST collected | CRA record-keeping |
| Purchase invoices and bills | Support ITC claims | CRA record-keeping |
| GST collected and ITC summaries | Reconcile each filing period | CRA record-keeping |
| Bank and financial statements | Verify and reconcile filings | CRA record-keeping |
| Contracts, agreements, and leases | Clarify tax treatment | CRA record-keeping |
| Import/export documentation | Support zero-rating and import credits | CRA record-keeping |
How do you reconcile GST before filing?
Match GST/HST collected and ITCs claimed against your ledger and bank records each period before you file. Reconciliation catches wrong-period figures and missed credits early, so your filed numbers survive a CRA audit. Businesses that reconcile annually or quarterly find errors long before the CRA does.
Do Foreign and Non-Resident Businesses Need to File Canadian GST?
Yes, non-residents selling into Canada can carry registration and filing obligations regardless of the CAD 30,000 threshold under the digital economy rules that took effect July 1, 2021. Simplified registration lets non-resident vendors and platform operators collect GST/HST but not claim ITCs. Normal registration allows ITCs but may require a security deposit with the CRA.
Place-of-supply rules decide the rate you charge per customer province. Commenda’s Canada GST/HST registration for foreign companies page walks non-residents through choosing the right regime and completing registration.
How Does GST Work for E-commerce, SaaS, and Exporters?
E-commerce and software-as-a-service (SaaS) sellers charge the rate of the customer’s province under place-of-supply rules, so tax codes must apply the correct provincial rate per transaction. Exports are zero-rated, meaning 0% GST on the sale while ITCs on inputs stay claimable. Exporters keep customs declarations and proof of export to support zero-rating.
Zero-rated is different from exempt. Zero-rated supplies carry a 0% rate with ITCs recoverable; exempt supplies carry no GST and no ITCs. Because zero-rating usually produces refunds, exporters often elect monthly filing to get that cash back sooner.
How Commenda Helps With GST Filing in Canada
Canadian GST/HST filing gets harder the moment you add provinces, a foreign parent, or a second country. Commenda’s global indirect tax software tracks your registration obligations and filing deadlines across jurisdictions, including Canadian GST/HST, so you know what is due, when, and that it got filed.
Commenda connects to your finance stack through 100+ ERP, API, and custom integrations, applying the correct provincial rate by customer location instead of one hardcoded default. For non-residents entering the market, our Canada GST/HST registration for foreign companies resource covers the simplified and normal regimes end to end.
Book a demo to get a free assessment of your Canadian GST/HST registration and filing obligations.
