Do I Need to Register for GST/HST as a Freelancer in Canada?

Your November invoice just landed and your trailing four quarters of revenue have crept past $30,000. You are sitting at your kitchen table at 11pm wondering if you should have been charging GST/HST already, whether you owe back-tax, and whether the CRA is about to send you a letter. Take a breath. The rules are not that bad once you see them laid out.

This is the question almost every Canadian freelancer hits eventually: do you actually have to register for GST/HST, and when? Short answer: it depends on two specific revenue triggers and which one you cross first. Long answer is below.

The $30,000 small-supplier threshold (what it is)

The CRA treats you as a "small supplier" as long as your worldwide taxable revenue stays at or under $30,000 across a defined window of time. If you are a small supplier, you do not have to register, you do not have to charge GST/HST on your invoices, and you do not file GST/HST returns. (CRA: When to register for and start charging the GST/HST)

Two things to flag right up front:

The $30,000 is gross revenue, not profit. Before expenses. Before your laptop, before your software subscriptions, before anything.
It is measured on taxable revenue, not total revenue. Those are different. More on that in a second.

The $30,000 figure is the threshold for individuals, sole proprietors, partnerships, and corporations. Public service bodies (charities, non-profits) get a higher $50,000 number, but if you are reading this you are almost certainly on the $30,000 line.

What counts as "taxable revenue" toward the threshold

This is the part that trips people up. The threshold is not based on "everything you got paid." It is based on taxable supplies, which in CRA language has a specific meaning.

Taxable supplies count. This is most freelance work: design, development, copywriting, consulting, coaching, photography, tutoring (in most cases), trades work, virtual assistant work. If the service would normally have GST/HST applied to it, the revenue counts.
Zero-rated supplies also count. Zero-rated means GST/HST applies but at a rate of 0%. Basic groceries, prescription drugs, exports, and certain agricultural products fall here. If you export services to a US client, that revenue is usually zero-rated, but it still counts toward your $30,000. People miss this constantly. (CRA: Type of supply)
Exempt supplies do not count. Exempt is a different category from zero-rated. Most residential rent, most health and dental services, most financial services, and certain educational services are exempt. Revenue from exempt activities does not count toward the threshold.

So if you bill $25,000 to Canadian clients and $8,000 to a US client, your taxable revenue is $33,000 (the US work is zero-rated, but it still counts). You are over.

The two triggers (this is the part that matters)

The CRA gives you two ways to cross the threshold, and the timing rules are different for each. You only need to trip one of them to lose your small-supplier status.

Trigger 1: the four-quarter rolling rule

You stop being a small supplier when your worldwide taxable revenue exceeds $30,000 over four consecutive calendar quarters. A calendar quarter means Jan-Mar, Apr-Jun, Jul-Sep, or Oct-Dec. The window is rolling. Every time a new quarter ends, you should be checking your trailing four-quarter total.

Under this trigger:

You are still a small supplier for the month after you cross.
Your effective date of registration is the first day of the month that begins after that grace month.
You have 29 days from your effective date to register with the CRA.

Worked example. Imagine your taxable revenue looks like this:

Quarter	Revenue
Q3 2025 (Jul-Sep)	$7,500
Q4 2025 (Oct-Dec)	$8,000
Q1 2026 (Jan-Mar)	$7,000
Q2 2026 (Apr-Jun)	$9,500
Trailing four-quarter total	$32,000

At the end of Q2 2026 (June 30), your trailing four quarters total $32,000. You are over. You get the month of July 2026 as a grace month while still a small supplier. Your effective date of registration is August 1, 2026, and you have until roughly August 29, 2026 to be registered. You start charging GST/HST on every taxable invoice dated on or after that effective date.

Trigger 2: the single-quarter rule

This one is harsher. If your taxable revenue exceeds $30,000 in a single calendar quarter, you stop being a small supplier immediately, on the supply that put you over.

There is no 29-day grace, no month off. The CRA says your effective date of registration is the date of that very transaction. You are required to charge GST/HST on that invoice and every taxable invoice after it.

Example. You quietly bill $9,000 a month for the first two months of Q1 2026, and then close a $15,000 contract on March 20. Your Q1 taxable revenue is $33,000. The $15,000 invoice is the supply that put you over. Your effective date of registration is March 20, 2026. That invoice should already have GST/HST on it.

In practice, most freelancers who hit this one find out after the fact and have to back-charge the client or eat the tax out of pocket. Neither is fun. Building a habit of checking your quarter total before signing a big contract is the easiest fix.

Associates and related parties (don't skip this)

If you run a sole proprietorship and your spouse runs a sole proprietorship, or if you are part of any associated group (a corporation you control plus a partnership you are in, related-party companies, etc.), the CRA may require you to combine the taxable revenue of all associated persons when checking the $30,000.

The CRA's instruction on the four-quarter test is explicit: include the revenue from "all your businesses and those of your associates (if they were associated at the beginning of the particular calendar quarter)." (CRA: When to register for and start charging the GST/HST)

"Associated" has a specific meaning in the Income Tax Act and the Excise Tax Act. Common-law partners running similar businesses, family-owned corporations under common control, and parent-subsidiary structures are typical cases. If you genuinely think this might apply to your setup, this is the moment to talk to your accountant rather than guess. The penalty for getting it wrong is collecting tax you should have collected.

What happens when you cross: the actual process

Once you cross either trigger, the steps are mechanical.

Get your Business Number (BN) if you do not have one. Your BN is a 9-digit identifier the CRA uses to tie all your tax accounts together. If you have ever filed payroll, opened an import/export account, or registered a corporation, you already have one.
Open a GST/HST program account on top of the BN. This is the RT0001 account. Your full GST/HST number looks like 123456789 RT0001. You can register through Business Registration Online (the CRA stopped accepting phone registrations on November 3, 2025), through your CRA My Business Account, or by mailing form RC1. (CRA: Register for a GST/HST account)
Pick a reporting period. Most small registrants are assigned annual filing by default. Quarterly and monthly are options you can elect.
Start charging the right rate. That depends on where the customer is, not where you are:
- 5% GST in Alberta, BC, Saskatchewan, Manitoba, NWT, Nunavut, Yukon, and Quebec (Quebec has its own QST on top, administered by Revenu Quebec)
- 13% HST in Ontario
- 14% HST in Nova Scotia (this dropped from 15% on April 1, 2025)
- 15% HST in New Brunswick, Newfoundland and Labrador, and PEI

If you are unsure where you sit on the threshold, our GST/HST threshold calculator walks you through the four-quarter math against your actual numbers.

Voluntary registration (why some freelancers register early)

You are allowed to register before you hit $30,000. This is called voluntary registration, and for a lot of B2B freelancers it makes more sense than waiting.

The reason is Input Tax Credits. When you are registered, the GST/HST you pay on business expenses (software subscriptions, your laptop, your accountant's fees, co-working space, advertising) is recoverable. You add it up, subtract it from the GST/HST you collected from clients, and remit the difference. If you pay more in than you collect, you get a refund.

The math leans toward voluntary registration when:

Most of your clients are other registered Canadian businesses. They claim back the GST/HST you charge them as their own ITC, so it costs them nothing. To them you just look more established.
You have meaningful taxable business expenses (gear, software, contractors, ads). Those ITCs add up.
You bill non-residents or US clients (zero-rated supplies). You collect 0% but still claim back ITCs on your expenses. This often results in a net refund.

It tilts away when:

Most of your clients are individual consumers who cannot claim ITCs. Adding 13% or 15% to your invoice makes you more expensive to them with no benefit.
Your expenses are tiny and your admin tolerance is lower than the cash you would recover.

Once you voluntarily register, you generally have to stay registered for at least one year before you can deregister. Our invoice impact calculator shows what changes for a specific invoice when you flip from unregistered to registered.

Where this trips people up

A few patterns we see repeatedly:

Counting net revenue instead of gross. It is gross. Before expenses.
Forgetting zero-rated revenue. US clients, exports, and zero-rated goods all count toward the threshold.
Watching only the calendar year. The four-quarter window is rolling, not annual. December 31 is not a special date in this calculation.
Missing the single-quarter rule. If a big project closes in one quarter and pushes you over $30,000 just on that quarter, you are over right then. There is no grace period and no rolling test that saves you. We unpack this scenario at length in The CRA single-quarter rule is a trap.
Assuming a corporation gets a separate threshold. If you incorporated and you are now invoicing through the corp, the corp has its own $30,000 threshold. But if you and the corp are associated under the rules, the revenue may need to be combined.
Registering, then forgetting to actually charge tax. Once your account is open and your effective date passes, every taxable invoice needs the tax line and your GST/HST number visible on it.
Charging the rate of your own province instead of the client's. The place-of-supply rules go off where the customer is located for most services. Get this wrong and you either over-collect or under-collect.

A note on when "ask your accountant" is the right answer

The rules above cover the typical freelancer case. They get more complicated quickly. If any of the following are true, the cost of a one-hour conversation with a Canadian accountant is much smaller than the cost of getting it wrong:

You have associated persons (spouse business, family corp, holdco).
You operate in multiple provinces or sell digital products to consumers across borders.
You mix taxable, zero-rated, and exempt supplies.
You are close to the threshold and considering deliberately structuring contracts to stay under it (this gets scrutinized).
You are buying or selling a business, or your corporation is winding down.

The CRA pages do not replace tailored advice. They are the source of truth for the rules; an accountant applies the rules to your specific facts.

So, do you need to register

If your trailing four quarters of taxable revenue (your stuff plus any associates) is comfortably under $30,000 and no single quarter is anywhere near $30,000, you do not need to register, and there is no penalty for staying small. Keep an eye on the trailing four-quarter total at the end of every quarter and you are fine.

If you have crossed either trigger, you need to register, and the clock is already ticking. Register first, then talk to your accountant about back-charging, cleaning up your invoice templates, and picking a reporting period that fits your cash flow. The full 2026 schedule is in GST/HST Remittance Dates for 2026.

If you are not sure where you stand, the GST/HST threshold calculator is the fastest way to find out. Punch in your quarterly numbers, see whether either trigger has fired, and go to bed.