How to register for sales tax in Canada as a U.S. business

If you’re a U.S. business that needs to register for Canadian sales tax, this guide shows exactly how to do it. Follow the steps below to navigate the new 2026 digital-only registration portals, secure your federal and provincial accounts, and avoid the “mail-delay trap” that causes most late-filing penalties.

At the end of this guide, you will know:

• How to obtain your 9-digit Business Number (BN) without a Canadian entity.
• Which of the two federal registration portals you must use (Regular vs. Simplified).
• The exact 2026 thresholds for the “non-harmonized” provinces (BC, SK, MB, QC).
• A shortcut to expedite the “Security Code” waiting period to ensure you don’t miss your first filing.

Before you begin: This guide is strictly about how to register once the decision is made. If you’re still unsure whether you need to register for Canadian sales tax, stop here and read Selling to Canada: What U.S. sellers need to know first.

Step 1: Confirm you’re required to register (the trigger test)

Before you start the paperwork, it’s worth double-checking that the law actually requires your business to register for federal and provincial Canadian sales tax collection and remittance.

For U.S. businesses, there are two distinct ways to “trigger” a Canadian tax obligation.

1. The federal trigger (GST/HST)

How the CRA classifies your business determines which of the two GST/HST regimes you must use. This classification is based on your “footprint” in Canada:

Pro tip: If you fall into the “Carrying on Business” category, you want to register for the Regular regime. It is the only way to get back the 5% tax you paid at the border (Input Tax Credits). In the Simplified regime, that 5% is a permanent sunk cost.

2. The provincial triggers (non-harmonized provinces)

Even if you are below the $30,000 federal limit, you may have an immediate obligation to register in one of the provinces that manages its own tax system. These “Non-Harmonized” provinces do not share an account with the CRA:

• Saskatchewan (PST): The ultimate outlier. There is no $30,000 buffer. If you ship a single taxable product to a resident in Saskatchewan, you are technically required to register immediately.
• British Columbia (PST): You must register if your sales to BC residents hit $10,000 CAD over 12 months.
• Manitoba (RST): You must register once your Manitoba-specific sales hit $30,000 CAD.
• Quebec (QST): You must register once your Quebec-specific sales hit $30,000 CAD.

Step 2: Prepare your application information

Now that you’ve confirmed you hit a trigger, don’t open the CRA registration portal yet.

To complete your business registration online without being timed out (the portal will kick you off after 15–30 minutes of inactivity), pull together this specific “dossier” of information first.

A “Responsible Officer” (Director) identification:

• Full Legal Name and Date of Birth of at least one company director.
• Social Security Number (SSN): The CRA uses this for instant identity verification in 2026. Without an SSN on the application, you cannot register online and will be forced into a weeks-long paper mail process.

Official business details:

• Legal Name: Exactly as it appears on your U.S. Articles of Incorporation.
• Physical & Mailing Address: Your U.S. headquarters address is perfectly fine.
• Fiscal Year-End: Usually December 31. Ensure this aligns with your U.S. tax filings to avoid a deadline nightmare later.
• Certificate of Incorporation

Your business’s “tax trigger” specifics:

• Effective Date of Registration: The specific day you crossed the $30,000 threshold (or the date you first stored inventory in Canada).
• Projected Annual Taxable Sales: A reasonable estimate of your Canadian revenue for the next 12 months.
• Major Business Activity: A one-sentence description (e.g., “Online retail of wellness products”).

Step 3: Register for your 9-digit Business Number (BN)

Before you can collect a single dollar of tax, you must be recognized as a legal entity by the Canadian government. This is done through a Business Number (BN).

Think of the BN as your “Company SSN” in Canada. Every tax account you open — GST, Payroll, or Corporate Tax — will be tied to this 9-digit identifier (e.g., 12345 6789).

How to get your Canadian BN online as a U.S. business

As of November 3, 2025, the CRA has moved to a strictly digital registration process. You no longer need a Canadian entity, but you do need to use the right portal:

• If you ship physical goods / are “carrying on business” (Regular Regime): Use the Non-Resident Business Number and Account Registration Web Form. This is the standard path for U.S. businesses that do not have a Canadian Social Insurance Number (SIN). This registration allows you to claim Input Tax Credits (ITCs) to recover tax paid on imports.
• If you sell Digital/SaaS (Simplified Regime): Use the Simplified GST/HST Registration for Digital Economy Businesses portal. This “pay-only” regime is for non-residents selling cross-border digital products to Canadian consumers.

Step 4: Obtain your GST/HST account number

In Canada, your GST/HST tax ID isn’t a random string of digits — it is a modular number built on top of your 9-digit Business Number (BN).

How the BN turns into your GST/HST Number

When you register, the CRA assigns you a 9-digit Business Number (think of it like your business’s “Parent ID”). To turn that into a tax-collecting GST/HST account, they add a specific suffix.

• The Business Number (BN): 12345 6789
• The GST/HST Suffix: RT 0001
• Your Complete GST/HST Tax ID: 12345 6789 RT 0001

Your single GST/HST registration covers the vast majority of Canada. When you have an active GST/HST account, you are legally authorized to collect and remit sales tax in nine of Canada’s thirteen provinces and territories:

• Ontario (13% HST)
• New Brunswick, Newfoundland and Labrador, Nova Scotia, and PEI (15% HST)
• Alberta, Northwest Territories, Nunavut, and Yukon (5% GST only)

In these regions, you don’t need separate provincial tax permits. You collect the tax using your GST/HST number, and the federal government (CRA) distributes it for you.

Step 5: Register for “non-harmonized” provincial sales tax accounts

In Canada, four provinces operate on their own independent systems. They do not “harmonize” with the federal government, meaning your GST/HST number is not valid for collecting tax in these areas.

You must visit each specific provincial portal to open separate tax accounts.

Step 7: Register for QST in Quebec

Quebec is getting a special mention in this guide because it doesn’t just have a different tax rate; it has a different taxing authority (Revenu Québec).

How to register for QST as a U.S. seller

If you decide to enter the market and sell more than $30,000 to Quebec residents, follow these steps:

1. Access the “Specified” Portal: Go to the Revenu Québec “Suppliers Outside Québec” portal. Do not use the general business registration link, or you’ll be asked for a Quebec Enterprise Number (NEQ), which you don’t have.
2. Verify your “Specified” Status: You will fill out a short questionnaire to confirm you are a non-resident. Once approved, you’ll receive a QST number that looks like 1234567890 TQ 0001 (Note the TQ instead of the CRA’s RT).

Should you opt out of selling in Quebec?

Many U.S. sellers choose to block sales to Quebec entirely. Why?

• Administrative overhead: You have to file a separate return specifically for Quebec.
• The French language mandate: Under Bill 96, all official business with the Quebec government should technically be in French. While Revenu Québec provides an English portal for non-residents, any formal disputes or physical expansion into the province may require French-language documentation.

Pro tip: Avoid the “NEQ” Trap. When registering in Quebec, ensure you use the “Specified” portal for non-residents. If you accidentally register through the general business portal, the system will assign you a Quebec Enterprise Number (NEQ). This classifies you as a local business, triggering a mandatory annual registration fee (approx. $100 CAD) and an obligation to file an annual corporate update in French. Using the “Specified” link is the only way for U.S. sellers to avoid this unnecessary cost and paperwork.

Step 7: Speed up the waiting period

Once you hit “Submit” on the federal and provincial portals, you are in Compliance Limbo. You have a tax number, but you cannot yet log in to file a return or pay the government.

The traditional path (10-14 Days)

The CRA will physically mail a 4-digit Security Code to your U.S. business address. In 2026, you cannot set up your My Business Account (required for filing) without this piece of paper.

The shortcut: Document Verification Service (DVS)

If you are up against a filing deadline, you can now skip the traditional path with this shortcut:

1. When prompted to “Request a Security Code,” look for the “Verify Identity with Document Verification Service” option.
2. You will be prompted to use your smartphone to take a real-time photo of a Director’s Passport or Driver’s License.
3. If the AI matches the ID to the application details, you get instant full access to your account.

Common registration mistakes U.S. sellers make

Most registration issues don’t come from a lack of effort — they come from applying U.S. “nexus” logic to a Canadian system that has its own set of rules. For a U.S. finance lead, the goal isn’t just to be registered, but to be efficiently registered.

Here are the most common traps we see U.S. sellers fall into and how to navigate them.

Scale into Canada with confidence

The biggest mistake U.S. sellers and finance teams can make is treating Canadian tax registration as a “check-the-box” admin task. In reality, how you register determines whether your Canadian expansion is a profit center or a margin drain.

The goal is to move Canada from a “manual headache” to a “background process.” Once you have your numbers and your portals set up, the smartest move is to stop managing 13 different provincial and federal triggers on a spreadsheet.

TaxCloud for Canada was built to handle this specific transition for cross-border sellers. We monitor your thresholds in real-time, alert you the moment you hit a provincial trigger, and ensure that every dollar of import GST is accounted for. You focus on the market; we’ll handle the portals.

Frequently asked questions

Do I need a Canadian address or legal entity to register for sales tax as a U.S. business?

No. U.S. sellers do not need to incorporate in Canada or have a physical office there to get a Business Number (BN) or a GST/HST account. You can register as a “Non-Resident” using your U.S. headquarters address and your U.S. Articles of Incorporation.

I only sell in Canada through Amazon/Marketplaces. Do I still need to register for sales tax?

It depends on your inventory.

• If you ship from the U.S. (MFN): Amazon generally handles the “Marketplace Facilitator” tax collection for you. If 100% of your sales are through a facilitator and you have no inventory in Canada, you likely don’t need to register.
• If you use FBA (Inventory in Canada): Yes, you should register. Even though Amazon collects the tax on the final sale, you are the “Importer of Record.” Without a Regular GST registration, you cannot reclaim the 5% tax you paid when your goods crossed the border. You are essentially throwing away 5% of your inventory’s value.

What is the difference between a “Business Number” and a “GST Number”?

Think of the Business Number (BN) as the parent (e.g., 12345 6789). It identifies your company. The GST Number is a specific “program account” attached to that parent (e.g., 12345 6789 RT 0001). You get the parent number first so that you can open the tax account.

Can I use my EIN instead of a Director’s SSN?

No. For the 2026 digital registration process (BRO), the CRA requires the Social Security Number (SSN) of a physical person (a director or owner) for identity verification. They will not accept an EIN or a corporate tax ID for this specific field.

I haven’t made any sales in Canada this month. Do I still have to file?

Yes. This is the “Nil Return” rule. Once you have an active tax account, the CRA expects a return for every period (monthly, quarterly, or annually). If you have $0 in sales, you must file a “Nil” return, or you will be hit with an automated non-filing penalty.

How do I actually get my money back from the border (ITCs)?

When you file your GST/HST return, there is a specific line for Input Tax Credits (ITCs). You enter the total amount of GST you paid at the border (keep your customs documents as proof). The CRA then subtracts that amount from the tax you collected from customers. If you paid more at the border than you collected in sales, the CRA sends you a refund check for the difference.