GST Registration for BC Small Businesses: When You Must Register, Thresholds & Input Tax Credits

Two Vancouver business owners. Maria, a freelance designer in East Van, crossed $30,000 in revenue in September — but didn’t register for GST (Goods and Services Tax) until December. Alex, a Burnaby consultant, registered voluntarily at $18,000, knowing his B2B clients claim the GST right back.

Maria now faces a Canada Revenue Agency (CRA) assessment for three months of uncollected GST. Alex has been recovering hundreds per quarter through input tax credits on his business expenses.

The difference is knowing the rules. This guide covers when BC businesses must register for GST, how BC’s two-tax system works (it’s not HST), and how to use input tax credits to your advantage.

---

BC’s Tax System — GST and PST, Not HST

Does BC have HST? No. And this is the most important thing to understand before anything else.

Many provinces use a Harmonized Sales Tax (HST) — a single combined federal and provincial tax. Ontario, Nova Scotia, New Brunswick, and PEI are HST provinces. British Columbia is not.

BC voted to leave HST in 2011 and returned to two separate taxes on April 1, 2013:

• GST (5%) — the federal Goods and Services Tax, administered by the Canada Revenue Agency (CRA)
• PST (7%) — BC’s Provincial Sales Tax, administered by the BC Ministry of Finance through eTaxBC

For your business: two separate registrations, two separate returns, two separate portals. When you search “HST registration BC,” you’ll land on federal content that isn’t quite right. BC businesses register for GST and PST independently.

This guide focuses on GST — which applies to almost every BC business — then covers PST.

---

The $30,000 Rule — When GST Registration Becomes Mandatory

Who Must Register?

You must register for GST when your total taxable revenues exceed $30,000. This is called the “small supplier threshold.” Below this amount, you are a “small supplier” and registration is optional — you can operate without charging GST to your clients.

Just starting out? You don’t need to register on day one. But you do need to track your revenue from your very first sale, because the clock starts immediately.

The $30,000 threshold is crossed in one of two ways:

1. The rolling four-quarter test: Add up your taxable revenues for any four consecutive calendar quarters. If the total exceeds $30,000, you’ve crossed the threshold — and different deadline rules apply (see below).
2. The single-quarter test: If your revenue in one calendar quarter alone exceeds $30,000, you must register immediately under the tighter 29-day rule (see below).

A Real-World Example — Rolling Four-Quarter Breach

You’re a freelance web developer based in Vancouver: – Q1 (Jan–Mar): $9,200 – Q2 (Apr–Jun): $8,800 – Q3 (Jul–Sep): $7,500 – Q4 (Oct–Dec): starts; by mid-November you’ve billed $5,000

Rolling four-quarter total: $9,200 + $8,800 + $7,500 + $5,000 = $30,500. You’ve crossed the threshold mid-November. Registration is now required — see deadlines below.

Registration Deadlines — The Part That Catches People Off Guard

How quickly you must register depends on which test triggered the obligation. These two scenarios have different deadlines:

---

Scenario A — Rolling four-quarter breach (like the web developer example above):

You must register by the end of the month following the month you crossed the threshold. In that example — rolling total first exceeding $30,000 in November — registration would be required by December 31.

---

Scenario B — Single-quarter breach:

If a single calendar quarter’s revenue alone exceeds $30,000 — for example, you land a major project and bill $38,000 in Q2 — the tighter 29-day rule applies. You have 29 days from the day that supply put you over to submit your registration to the CRA.

---

In both cases, the same critical rule applies:

Your effective date of registration is the date you crossed $30,000 — not the date you submit your application. The CRA doesn’t care when you got around to registering. If you crossed the threshold in September and filed your application in December, you owe GST on every taxable sale from September forward.

You cannot go back to clients and add 5% GST to invoices you’ve already issued. If GST wasn’t collected, you’ll need to cover it from your own pocket.

⚡ Common GST compliance gap in BC: Not realizing until late in the year that the threshold was crossed months earlier. The CRA assesses retroactively from your effective registration date — uncollected GST plus interest. If you think you may have already crossed, register now and get professional guidance on your retroactive position.

To register: use the CRA’s Business Registration Online (BRO) at canada.ca. You’ll receive a Business Number (BN) with a GST/HST account suffix. Registration is free.

What counts toward the $30,000: – Taxable sales and services (including zero-rated supplies) – Revenue from businesses associated with or related to yours

What does NOT count: – Exempt supplies (residential rent, most health services, most financial services) – Sales of capital property (such as a business vehicle) – Goodwill received from a business sale

---

Voluntary Registration — When It Makes Sense Before $30,000

Should you register before hitting $30,000? Often yes — especially if you sell to other businesses.

The reason: once you’re GST-registered, you can claim back the GST you’ve paid on business expenses through input tax credits (ITCs). If your clients are also registered businesses, they can claim back the GST you charge them — so registering early doesn’t make you more expensive in their eyes.

Voluntary registration usually makes sense when: – You sell primarily to other businesses (B2B) – You have significant GST-bearing expenses (equipment, software, professional fees) – You expect to grow past $30,000 within the year

It may not make sense when: – You sell directly to consumers (B2C) — they can’t claim back the 5% – Your business expenses are minimal – You’re early-stage and compliance overhead outweighs ITC recovery

💡 Vancouver B2B tip: Consultants, developers, and designers selling to businesses should seriously consider registering voluntarily. ITCs on your software, phone, and accounting fees add up — and your clients recover the GST anyway.

---

Input Tax Credits (ITCs) — Getting Your GST Back

An input tax credit (ITC) lets you credit the GST you pay on business purchases against the GST you collect. Your GST return calculates net tax:

Net Tax = GST collected from clients − ITCs (GST you paid on business expenses)

If your net tax is positive, you remit that amount to the CRA. If your ITCs exceed GST collected — common for new businesses in a heavy startup phase — the CRA refunds the difference.

Common ITC-eligible expenses for BC small businesses: – Computer equipment and electronics – Software subscriptions (where GST applies) – Office supplies and furniture – Business vehicle expenses (business-use portion only) – Accounting and legal fees (where GST is charged) – Marketing, advertising, and design services – Coworking space or office rent (when your landlord is GST-registered)

What does NOT qualify for ITCs: – Personal expenses or the personal-use portion of mixed-use items – Employee wages and payroll (no GST on wages) – Expenses related to exempt supplies (see below)

Zero-Rated vs. Exempt Supplies — A Distinction That Matters

• Zero-rated supplies — taxed at 0% GST, but you can still claim ITCs on related expenses. Examples: basic groceries, prescription drugs, exports, medical devices.
• Exempt supplies — no GST charged, and no ITCs available on related expenses. Examples: residential rent, most health-care services, most financial services.

For most Metro Vancouver small businesses, virtually all services and goods are taxable. But if you mix taxable activities with exempt ones (e.g., renting a residential unit), you’ll need to track expenses separately.

---

Registered for GST but not sure you’re claiming all your ITCs? A quick bookkeeping review often uncovers hundreds in unclaimed credits — especially for consultants and freelancers with software, equipment, and professional fee expenses. Talk to a CPA →

---

---

What Happens If You Don’t Register When You Should?

The CRA can assess retroactively to your effective registration date — the date you crossed $30,000, not when you applied. This means: – GST owed on all taxable sales from the effective date – Uncollected GST comes out of your own pocket – Interest accrues from the effective date – Going back to clients to collect retroactively is generally not practical

If you think you’ve crossed the threshold without registering, act promptly — the sooner it’s addressed, the more straightforward the resolution.

---

Special Cases Worth Knowing

Rideshare and taxi operators: If you drive for Uber, Lyft, or any ride-hailing or taxi service in BC, you must register for GST regardless of revenue. There is no small supplier exemption for passenger transportation. Register before your first trip.

Digital services (non-resident vendors): Since July 2021, non-resident vendors selling digital products or services to Canadian consumers must register for GST if revenues exceed $30,000.

Short-term rentals: GST may apply to short-term accommodation (stays under 28 days) once you cross $30,000. BC also has PST rules for accommodation, and regulations changed significantly in 2024. Confirm current obligations with a CPA.

---

Frequently Asked Questions

Does BC have HST? No. BC returned to separate GST (5%) and PST (7%) on April 1, 2013. You register for each separately through different government portals.

What is the GST registration threshold in Canada? $30,000 in taxable revenues over four consecutive calendar quarters, or in a single quarter. Below this, you’re a “small supplier” and registration is optional. Proposed changes may raise this figure — confirm with your accountant.

How long do I have to register once I cross the threshold? Single-quarter breach: 29 days from the triggering supply. Rolling four-quarter breach: end of the following month. In both cases, your effective registration date is the day you crossed — the CRA assesses retroactively.

Should I register voluntarily if I’m under $30,000? Often yes for B2B businesses — ITC recovery on expenses is real and compliance overhead is manageable with bookkeeping support.

Do I need to register for PST separately? Depends on what you sell. Most service businesses are PST-exempt; most goods-sellers must register via eTaxBC. It’s a separate registration from GST.

What happens if I charge GST before I’m registered? You cannot legally charge GST without a valid registration number. Address this with a CPA immediately — prompt registration and accurate record-keeping is the solution.

---

Ready to Get This Right?

Getting GST set up correctly from the start is far simpler than untangling a CRA compliance gap later.

Not sure if your BC business needs to register for GST, PST, or both? Our Vancouver CPA team can review your situation and give you clarity — usually in a single conversation. Book a free compliance consultation.

Numbers You Can Trust. Advice You Can Count On.