GST/HST Filing Guide for Toronto Businesses

Toronto businesses that are registered for the goods and services tax or harmonized sales tax must file returns regularly with the Canada Revenue Agency. Understanding the rules around registration, filing deadlines, and accepted electronic methods helps you stay compliant. This article covers the key facts you need to know for the 2026 tax year, based on current CRA guidelines.

Who Needs to Register for GST/HST in Toronto

All persons carrying on a business in Canada are required to register for and collect or remit GST/HST unless they are deemed to be small suppliers. If your business is not yet registered, you must determine whether you qualify as a small supplier under the CRA's definition. Once your revenue exceeds the applicable threshold, registration becomes mandatory and you must begin charging GST/HST to your customers.

Small Supplier Status

The Canada Revenue Agency defines small suppliers based on the total value of taxable supplies made in a calendar year. If your business falls below this threshold, you are not required to register. You can also choose to register voluntarily, which lets you claim input tax credits on your business expenses. Many Toronto sole proprietors and freelancers start as small suppliers and register only when their sales grow.

When to Register

You must register as a GST/HST registrant as soon as your business no longer meets the small supplier definition. The CRA will assign you a business number and a reporting period based on your estimated annual revenue. After registration, you are responsible for collecting tax on taxable supplies and filing returns on time.

Filing Deadlines for 2026

The deadline for filing your GST/HST return depends on your assigned reporting frequency. Common frequencies are monthly, quarterly, or annually. For quarterly filers, the due date is the last day of the month following the end of the quarter. Annual filers must submit their return by June 15 of the following year. Your personalized GST/HST return form sent by the CRA shows your specific due date, so check it carefully each period.

What Happens If You Miss the Deadline

If you file late, the CRA may charge penalties and interest on any amount owing. Even if you cannot pay the full balance, it is important to file the return on time to minimize penalties. You can contact the CRA to discuss payment arrangements if needed. Staying on top of your filing schedule helps avoid unnecessary charges.

Electronic Filing Is Mandatory

As of January 1, 2024, all GST and QST registrants except charities must file their GST/HST returns electronically. This means paper filing is no longer accepted for most businesses. The CRA offers several secure online methods to submit your return, and you must choose one that works for your business.

Using the GST/HST NETFILE Form

You can file your GST/HST return and eligible rebates directly with the CRA using the online GST/HST NETFILE form. This method requires an access code from your personalized return. It gives you a confirmation number immediately and does not require you to have an online CRA account. Most GST/HST registrants can use this method to meet the electronic filing requirement.

Using My Business Account

If you have a CRA My Business Account, you can file your return online through that portal. This option lets you view your account information, send documents, and manage all your business tax matters in one place. Log in with your credentials and follow the prompts to complete your GST/HST filing.

Using Accounting Software

Many Toronto businesses use accounting software such as QuickBooks to file their GST/HST returns. The software can prepare the return and transmit it electronically to the CRA. This method is especially useful if you already use the software for bookkeeping, as it simplifies the reconciliation of sales, purchases, and tax collected.

GST/HST TELEFILE

GST/HST TELEFILE is another electronic option that allows you to file by phone. You call the CRA's automated telephone system and enter the required information using your keypad. This method is available for those who prefer not to use a computer. A confirmation number is provided at the end of the call.

What You Need to File Your Return

To file your GST/HST return, you need your business number, the reporting period, and the amount of GST/HST you collected or became collectible on your sales. You also need to calculate your input tax credits (ITCs) for the period. The net tax is the difference between the tax you collected and the ITCs you are claiming. If the net tax is positive, you remit that amount to the CRA. If it is negative, you are entitled to a refund.

Common Filing Mistakes to Avoid

Mixing up zero-rated supplies and exempt supplies is a frequent error. Zero-rated supplies are taxable at 0% but still count in your revenue totals, while exempt supplies do not carry tax at all. Also, be sure to claim all eligible input tax credits. Using accounting software or consulting a tax professional can help reduce mistakes and ensure your return is accurate.

Resolving Filing Issues

If you encounter a problem while filing, the CRA provides several ways to get help. You can visit the Canada.ca website for general guidance. You can also contact the CRA online to get account information and send documents, by phone for answers specific to your file, or by mail if you need to send a document to the right address. The CRA's contact page for GST/HST filing issues lists the appropriate channels.

Frequently Asked Questions

Do I need to charge GST if my revenue is below the small supplier threshold?

The CRA exempts businesses that qualify as small suppliers from mandatory registration. The exact threshold is defined by the CRA based on annual taxable supplies. If your revenue is below that limit, you are not required to collect GST/HST. You may still choose to register voluntarily, which allows you to claim input tax credits.

Can I file my GST return myself without an accountant?

Yes, you can file your GST/HST return yourself using one of the electronic methods available, such as GST/HST NETFILE, TELEFILE, or My Business Account. Many small business owners file on their own. If your business has complex transactions or you prefer professional guidance, an accountant can help ensure accuracy.

When is the GST/HST return deadline for quarterly filers?

For quarterly filers, the deadline is the last day of the month following the end of the quarter. For example, if your quarter ends on March 31, the return is due by April 30. Annual filers must submit by June 15 of the following year. Your personalized return form shows your exact due date.

Who specifically must register for GST/HST in Canada?

All persons carrying on a business in Canada are required to register for and collect or remit GST/HST unless they are deemed small suppliers. This includes sole proprietors, partnerships, corporations, and other entities that make taxable supplies in Canada. Once registered, you must file returns according to your assigned frequency, even if you have no tax to remit.

Staying on top of your GST/HST obligations is a critical part of running a Toronto business. By understanding the registration criteria, knowing your filing deadlines, and using an acceptable electronic method, you can meet your CRA requirements with confidence. If your situation is unique or you need assistance, consider speaking with a tax professional who can provide personalized advice.