Will your business be filing HST this year? Here are some tips on how to file correctly and avoid any potential hassle from the CRA.
Canada’s sales tax framework blends federal and provincial rules, which is why getting HST filing right matters so much for small businesses. HST is collected in the participating provinces of Ontario, New Brunswick, Newfoundland and Labrador, Nova Scotia, and Prince Edward Island. Everywhere else, you collect the 5 percent GST and, where applicable, a separate provincial sales tax or Quebec Sales Tax. A key 2025 update many owners miss is Nova Scotia’s rate change. As of April 1, 2025, the combined HST in Nova Scotia is 14 percent. Ontario remains at 13 percent, and New Brunswick, Newfoundland and Labrador, and Prince Edward Island remain at 15 percent. Setting up your systems to apply the correct rate by customer location is the first building block of accurate compliance.
Maintain proper documentation
Ensure that you are maintaining appropriate documentation for all HST-related items that you plan to claim on your taxes. ITC and ITR items can be deducted and lower the amount in overall taxes that you pay. However, you must have a “paper trail” of sorts to provide adequate information about the deductions you are making. Providing documentation helps to ensure that your deductions will be approved and that you can indeed take the appropriate amounts off of your business’s overall income based on your business expenses.
Strong records protect your cash flow and your Input Tax Credits. Under the Excise Tax Act, you must keep books and records for at least six years after the end of the last fiscal year to which they relate. Electronic records are acceptable if they are readable, complete, and can be provided to the CRA upon request. For every transaction, your documentation should clearly show the supplier name, GST HST registration number where required, date, description of the supply, the amount paid or payable, and the tax charged or a statement that tax is included. For smaller amounts, CRA allows simplified invoice requirements, but good practice is to keep full detail wherever possible.
If you import goods, retain customs accounting documents since these often substantiate ITCs that do not appear on a vendor invoice. If you grant early payment discounts, issue credit notes for returns, or make pricing adjustments, keep the related credit or debit notes with your HST working papers so ITCs and net tax are reconciled in the proper period. Businesses using point of sale or e-commerce platforms should ensure that tax codes align with provincial rules for shipping destinations, gift cards, delivery fees, and digital products. A regular review of tax settings prevents small errors from compounding across hundreds of transactions.
Understand registration requirements
You must register for GST/HST when your worldwide taxable supplies exceed thirty thousand dollars in a single calendar quarter or over four consecutive calendar quarters. Once you exceed the threshold, you are required to register and charge tax as of the day you go over the limit. Many small suppliers register voluntarily below the threshold so they can claim ITCs on their expenses.
If you sell digital products or services to Canadian customers, pay attention to the digital economy rules. Certain non-resident vendors and platform operators that exceed the threshold while supplying to Canadian consumers must register and collect GST/HST under the simplified regime. Taxi and ride-sharing services must register regardless of income level. For short-term accommodation, some marketplace platforms are deemed suppliers that collect and remit on consumer transactions; if a platform is collecting, do not also charge HST on the same sale. Otherwise, the small-supplier rules apply in the usual way.
You can register online using CRA My Business Account, by mail with Form RC1, or by phone. When registering, set your fiscal year end correctly and choose a filing frequency that supports your cash flow. If you expect refunds most periods, monthly or quarterly filing can accelerate ITC recoveries. If you expect to remit net tax in most periods, annual filing may reduce administrative time while still meeting your obligations.
Report intercompany transactions accurately
If you are making intercompany transactions, intercompany supplies must be reported correctly on your HST return when you go to file for taxes. Be sure to follow these rules as sometimes intercompany transactions can disrupt the cash flow your business has on hand and can alter the amount you owe in taxes.
Related party transactions still matter for HST. Supplies between closely related Canadian corporations or specified partnerships can be relieved from tax if you qualify and file the section 156 closely related election. In 2025, the correct form is RC4616 to make, renew, or revoke that election. This election applies only where both parties are registered, the entities are closely related under the Act, and the supplies are taxable supplies made in Canada. Keep signed copies of the election and ensure your accounting system suppresses HST only for eligible related party supplies. If you do not qualify for the election, charge HST at the appropriate rate or document the applicable exemption and support fair market value where required. Service agreements and intercompany invoices should be issued consistently so that both sides report the same amounts in the same reporting period.
Transfers of real property, intellectual property, or significant equipment often have additional HST considerations and sometimes require self-assessment. When corporate reorganizations occur, evaluate whether relief provisions or specific elections apply before posting entries. Proper planning avoids unexpected remittance obligations and preserves ITCs.
File and remit HST on time
Electronic filing is mandatory for most registrants for reporting periods that begin on or after January 1, 2024. File electronically through CRA My Business Account or GST/HST NETFILE and remit electronically using My Payment or a pre-authorized debit. The CRA assigns filing frequency based on your annual taxable supplies. If they are one point five million dollars or less, you file annually unless you choose to file more frequently. If they are more than one point five million up to six million dollars, you file quarterly. If they are more than six million dollars, you file monthly. Your return and payment are due by the date CRA specifies for your frequency and year-end. Interest applies to unpaid amounts from the day after the due date until paid, and late filing penalties can apply even if a refund is expected, which is why filing on time is essential.
If you report annually and have employees, remember that your installment and remittance obligations for payroll are separate. If you are on an annual HST filing and continuously in a refund position, consider switching to quarterly or monthly filing to improve cash flow. File nil returns when required rather than skipping a period, because skipped returns can prompt compliance notices or hold up refunds in later periods.
For more information on HST changes that may affect your business, refer to the Government of Canada’s website.
Know what is taxable, zero-rated, or exempt
Charging the wrong tax creates compliance risk and can damage customer relationships. Most sales of goods and most services are taxable at the rate for the destination province. Some supplies are zero-rated, such as many basic groceries and certain exported goods and services. Some are exempt, such as most residential rents, many health and dental services provided by regulated professionals, and many educational services. Exempt supplies let you avoid charging tax but also generally block ITCs related to those supplies. If you make both taxable and exempt supplies, you may need to prorate ITCs based on use. Review your product and service list each year, including shipping and handling, to confirm the correct tax status and to ensure your invoicing and point of sale systems match.
Input Tax Credits that many small businesses miss
ITCs often sit unclaimed because documentation is scattered. Common examples include HST embedded in customs import charges where your business is the importer of record, HST on business use portions of home office costs if you are registered and carrying on a commercial activity, HST on professional fees related to taxable activities, HST on software subscriptions and cloud systems used primarily for commercial activity, and HST on vehicle expenses when the vehicle is used in commercial activity and you are tracking use correctly. For capital property, make sure you understand whether the purchase is for exclusive commercial use or mixed use, and track changes in use adjustments if your pattern of use changes later.
The digital economy and platform reporting
If your business sells through online marketplaces, confirm who is responsible for charging and remitting tax on each sale. Under the platform rules, some marketplaces are deemed suppliers for transactions with Canadian consumers, which means the platform collects and remits. If the platform is the deemed supplier, you should not also charge HST on the same transaction. Keep platform statements with your records so your sales and tax reporting reconcile to payouts. If you sell subscriptions or digital services directly to Canadian consumers, ensure your registration and invoicing meet CRA requirements and that you have a reliable process to determine the province of supply for the correct rate.
Adjustments, refunds, and corrections
Mistakes happen. If you charged too much tax to a customer, issue a credit note and adjust your net tax in the period the credit note is issued. If you charged too little tax, you may need to collect the shortfall or self-assess, then remit the correct amount. If you discover an error in a previously filed return, you can request an adjustment through My Business Account. Keep a clear audit trail for any change so the opening balance of your next return matches your ledger. When you claim ITCs late, remember the time limits. In most cases, registrants have up to four years to claim ITCs, though some registrants are limited to two years based on their size and type. A simple checklist that you review each quarter can prevent these items from being missed until it is too late.
Practical filing workflow you can adopt today
Set tax codes correctly in your accounting system for each province and review them quarterly. Reconcile your sales and tax collected to invoices and bank deposits each period. Reconcile your ITCs to supplier invoices and payment records, and verify that supplier registration numbers are included on larger invoices. Prepare a short filing package for each period that includes sales reports by province, ITC detail, credit or debit notes, import documents supporting ITCs, and a copy of the filed return and payment confirmation. Store this package electronically in a folder by period so that any CRA review can be addressed quickly.
When to get professional help
Complexity grows with intercompany transactions, reorganizations, mixed taxable and exempt supplies, cross-border sales, and rapid e-commerce growth. If any of these apply, it is wise to involve an accounting professional before your next filing period. A short review typically costs far less than the penalties and interest from a preventable error. Mention HST health checks when you meet your accountant for year-end planning. One structured review can identify missing ITCs, rate errors by province, or systems issues that silently drain cash.
Ebrahimjee and Essaji Professional Accountants can help you register, configure your systems, set up a clean filing workflow, and prepare for a review if the CRA asks questions. One well-planned session can pay for itself by preventing penalties and unlocking ITCs that belong to you.
E&E Professional Accountants has years of experience in assisting businesses with their accounting needs. We are founded and managed by an experienced corporate auditor and a former CRA tax auditor. Feel free to contact us for assistance with all your accounting and bookkeeping needs.