If you run a small business in Canada, understanding your GST/HST obligations is not optional — it is a legal requirement once you cross certain revenue thresholds. Whether you are a sole proprietor, incorporated business, or freelancer, the Canada Revenue Agency (CRA) has clear rules about when you must register, how to collect, and when to remit. This guide walks you through everything you need to know for the 2025 tax year.
What Is GST/HST and Who Charges It?
The Goods and Services Tax (GST) is a federal tax of 5% applied to most goods and services sold in Canada. In participating provinces — Ontario, Nova Scotia, New Brunswick, Newfoundland and Labrador, and Prince Edward Island — the GST is harmonized with the provincial sales tax to form the Harmonized Sales Tax (HST). Rates vary by province:
- Alberta, British Columbia, Manitoba, Saskatchewan, Quebec — 5% GST (provincial sales tax collected separately)
- Ontario — 13% HST
- Nova Scotia — 15% HST
- New Brunswick, Newfoundland and Labrador, PEI — 15% HST
Quebec administers its own QST separately through Revenu Québec, though federal GST rules still apply to most Quebec businesses.
The $30,000 Small Supplier Threshold
The most important rule for small businesses is the small supplier threshold. You are not required to register for GST/HST if your total taxable revenue in any single calendar quarter, or in the last four consecutive calendar quarters, is $30,000 CAD or less. This threshold applies to individuals, partnerships, and corporations alike.
However, the moment your revenues exceed $30,000 — whether in a single quarter or cumulatively over four quarters — you are no longer considered a small supplier. You must register within 29 days of exceeding the threshold, and you must begin collecting GST/HST on the very sale that pushed you over.
Important Nuances to the Threshold
- The $30,000 limit applies to worldwide taxable supplies, not just Canadian sales
- Associated corporations must combine their revenues when calculating the threshold
- Certain supplies — like most residential rent, used residential property sales, and financial services — are exempt and do not count toward the threshold
- Zero-rated supplies (e.g., basic groceries, prescription drugs, exports) do count toward the threshold even though GST is charged at 0%
- Taxi, ride-sharing, and short-term accommodation operators must register regardless of revenue level
Voluntary Registration: Should You Register Early?
Even if your revenue is under $30,000, you may choose to register voluntarily. This is often a smart move for businesses that incur significant GST/HST on their purchases. Voluntary registration allows you to claim Input Tax Credits (ITCs) — effectively recovering the GST/HST you paid on business expenses.
For example, a Calgary-based web designer just starting out who spends $10,000 on software, hardware, and office rent (all subject to 5% GST) has $500 in recoverable tax. Without registration, that $500 is simply a cost. With registration, it is refunded. The team at Swift Accounting Ltd. in Calgary generally recommends voluntary registration for any business that anticipates growth or has substantial startup costs.
Input Tax Credits (ITCs) Explained
ITCs are the mechanism by which GST/HST registrants recover the tax they paid on business inputs. To claim an ITC, the expense must meet these conditions:
- The good or service was acquired for use in your commercial activities
- You have documentation — typically a receipt or invoice showing the supplier's GST/HST registration number, the amount of tax charged, and the date
- The claim is made within four years of the reporting period in which the tax became payable (two years for large businesses)
Common ITC-eligible expenses include office supplies, professional services, business software subscriptions, vehicle expenses used for commercial purposes, and capital equipment purchases. Meals and entertainment are only 50% ITC-eligible, mirroring the income tax treatment.
Practical Example: A Calgary Consultant in 2025
Suppose Priya is a management consultant operating as a sole proprietor in Calgary, Alberta. In 2025, she earns $85,000 in consulting fees. Because Alberta has no provincial sales tax, she charges 5% GST on all invoices.
- GST collected from clients: $85,000 × 5% = $4,250
- GST paid on business expenses (software, professional fees, office supplies): $3,200 × 5% = $160
- Net GST owing to CRA: $4,250 − $160 = $4,090
Priya files quarterly and remits $4,090 for the year across four instalments. If she had not registered, she would not be able to recover that $160 in ITCs — a small but real saving. More importantly, not registering despite earning $85,000 would expose her to CRA penalties and back-assessments.
Filing Periods: Annual, Quarterly, or Monthly?
Your required filing frequency depends on your annual taxable supplies:
- Annual — taxable revenues of $1,500,000 or less (option available; CRA may assign quarterly)
- Quarterly — taxable revenues between $1,500,001 and $6,000,000
- Monthly — taxable revenues over $6,000,000
Annual filers with a December 31 year-end have until June 15 of the following year to file, but any balance owing is due by April 30 — the same deadline as personal income tax. Quarterly and monthly filers generally have one month after the period ends to file and remit.
New registrants are typically assigned an annual filing period by default, but you can elect quarterly if that suits your cash flow better. Many small business owners prefer quarterly filing to avoid a large lump-sum remittance at year-end.
The Quick Method of Accounting
The Quick Method is a simplified GST/HST accounting option available to most businesses with annual taxable revenues of $400,000 or less. Instead of tracking every ITC, you remit a flat percentage of your gross revenues (including GST/HST collected). The rates for 2025 are:
- Service businesses in provinces with 5% GST: remit 3.6% of gross revenues
- Retailers and wholesalers in provinces with 5% GST: remit 1.8% of gross revenues
- Rates are higher in HST provinces to reflect the higher combined rate
Using Priya's example above under the Quick Method: $85,000 × 1.05 = $89,250 gross revenue. At 3.6%, she would remit $89,250 × 3.6% = $3,213. Compared to the regular method remittance of $4,090, she saves $877 — keeping the difference as a government-approved simplification benefit. However, she would forgo claiming individual ITCs, so the Quick Method is only advantageous when your input GST/HST is relatively low compared to your revenues.
You must elect the Quick Method in writing before the first day of the reporting period in which you want it to apply. Swift Accounting Ltd. can help you model whether the Quick Method makes financial sense for your specific business mix.
Zero-Rated vs. Exempt Supplies
Not all goods and services are created equal under GST/HST rules. Understanding the difference between zero-rated and exempt supplies matters for both registration and ITC claims:
- Zero-rated supplies — GST/HST applies at 0%. You still register and can claim ITCs. Examples: basic groceries, prescription drugs, most agricultural products, and international exports.
- Exempt supplies — No GST/HST is charged, but you also cannot claim ITCs on related expenses. Examples: most residential rent, child care services, most health care services, and financial services.
If your business makes a mix of taxable and exempt supplies, you must apportion your ITCs to reflect only the taxable portion of your activity. This calculation can be complex and is an area where professional accounting guidance pays for itself.
Penalties for Non-Compliance
Failing to register when required, not collecting GST/HST, or remitting late all carry CRA penalties. Late remittances are subject to a penalty of 1% of the amount owing plus an additional 25% of that 1% for each full month the return is late, up to 12 months. CRA also charges compound daily interest on unpaid amounts at the prescribed rate. Directors of corporations can be held personally liable for unremitted GST/HST under director's liability provisions.
Frequently Asked Questions
1. I just crossed $30,000 mid-year. Do I charge GST/HST on the sale that put me over?
Yes. The sale that causes you to exceed the $30,000 threshold is the first sale on which you must charge GST/HST. You then have 29 days to register with the CRA. Retroactive collection on prior sales is not required, but you should register immediately to avoid penalties on future sales made while unregistered.
2. Can I deregister for GST/HST if my revenue drops below $30,000?
Yes, but not immediately. You must remain registered for at least one full year after voluntary registration. After that, you can apply to cancel your registration if your revenues have fallen and are expected to stay below the threshold. Mandatory registrants who drop below $30,000 may also apply to cancel. CRA will confirm the cancellation effective date.
3. Do I charge GST/HST on services provided to clients outside Canada?
Generally, services rendered to non-residents for use outside Canada are zero-rated, meaning you charge 0% GST/HST but can still claim ITCs. However, the rules around cross-border digital services, intangible supplies, and non-resident purchasers are nuanced. If your client is a Canadian resident who happens to be temporarily abroad, different rules may apply. Always confirm the recipient's residency status and the place of supply.
4. What records do I need to keep for GST/HST purposes?
CRA requires you to retain all records that support your GST/HST returns for a minimum of six years from the end of the year they relate to. This includes sales invoices showing your GST/HST number, purchase receipts with supplier registration numbers, bank statements, and any contracts. Digital records are acceptable provided they are complete and accessible. Failing to maintain adequate records can result in the denial of ITCs on audit.
GST/HST compliance is one of the foundational obligations for any Canadian small business, and getting it right from day one protects you from costly CRA reassessments down the road. If you are unsure whether you need to register, which filing method suits you best, or how to handle a mixed-supply business, speaking with a professional accountant is time well spent. Contact Swift Accounting Ltd. today to get straightforward, Calgary-based advice on your GST/HST obligations — so you can focus on growing your business with confidence.