HST Filing Rules for New Brunswick Businesses: A Complete Guide

You file your HST return and realize you forgot to include a batch of invoices from last quarter. Now you are looking at a reassessment notice from the CRA with interest and penalties. For New Brunswick businesses, the HST filing rules can trip up even careful bookkeepers. The harmonized sales tax (HST) in New Brunswick is 15%, and the rules around registration, filing frequency, and input tax credits are specific. This guide walks through the key filing rules every New Brunswick business should know, and how dedicated Canadian accounting software like Awditify can help you stay compliant without the headache.

Understanding HST in New Brunswick

New Brunswick adopted the harmonized sales tax in 1997, combining the 5% federal GST with a 10% provincial portion to create a single 15% HST. This means businesses in NB collect and remit one tax instead of two. The CRA administers the HST on behalf of the province, so you file a single return.

Who must register? Any person (individual, partnership, corporation) that makes taxable supplies in Canada and earns more than $30,000 in a calendar quarter or over four consecutive quarters must register for the GST/HST. If you are under the threshold, you can voluntarily register to claim input tax credits. New Brunswick does not have a separate provincial sales tax, so the HST is the only sales tax you deal with.

Registration and Thresholds

If your total taxable revenues from all your businesses (including those of associates) exceed $30,000 in a single calendar quarter or over the last four consecutive quarters, you must register. The $30,000 threshold applies to worldwide taxable supplies. Once you exceed it, you must register by the due date of the return for the period in which you exceeded the threshold. Failure to register can result in penalties of $250 or more.

Voluntary registration can be beneficial if you have significant expenses and want to claim ITCs. However, once registered, you must collect HST on all taxable supplies and file returns for at least one year.

A Note on Small Supplier Exemption

Small suppliers (under $30,000) do not have to charge HST but also cannot claim ITCs. This can be a tradeoff. If your purchases are high, voluntary registration might make sense. If your customers are mostly consumers, not charging HST might be simpler.

Filing Frequency and Deadlines

The CRA assigns your filing frequency based on your total annual taxable revenues. For most small businesses, it is annual. As revenues grow, you may be required to file quarterly or monthly.

Electronic filing is required if you are a monthly filer or if your annual taxable supplies exceed $1.5 million. Others can file by paper or electronically via the CRA's My Business Account or NETFILE.

Penalties for Late Filing

Late filing penalties are 1% of the amount owing, plus 25% of that 1% for each full month late, up to 12 months. Interest also applies on overdue amounts. The current interest rate is set quarterly.

Input Tax Credits

You can claim ITCs to recover the HST paid on business expenses. However, restrictions apply. You cannot claim ITCs on:

• Meals and entertainment (50% generally)
• Goods and services used to provide exempt supplies (e.g., residential rent, financial services)
• Personal expenses
• Capital property used less than 50% for commercial use

You must keep proper documentation: invoices showing the supplier's business number, the amount of HST charged, and a description of the goods or services. Without valid receipts, the CRA may deny the ITCs. For a deeper dive, see our guide on How to Record Sales Tax in Canadian Bookkeeping.

ITC Timing

You can claim ITCs in the period you receive the invoice, not necessarily when you pay. However, you must report the ITC in the first reporting period in which you have the supporting document. If you miss a period, you can adjust a previous return within four years.

Common HST Filing Errors

• Mixing personal and business expenses: easy to do with shared vehicles or home office. Keep a log and separate accounts.
• Incorrectly applying the place of supply rules: HST rates vary by province. If you sell to customers in other provinces, you may need to charge their provincial rate. For services, the place of supply depends on where the customer is located.
• Forgetting to file a return even with no activity: you must file a nil return if you are registered and have no sales or ITCs. Otherwise, the CRA may assess you.
• Missing the deadline: set reminders or use software that tracks due dates.

How Awditify Simplifies HST Compliance for New Brunswick Businesses

Manually tracking HST collected and paid, calculating remittances, and filing on time is a burden. Awditify, a Canadian cloud platform designed for small businesses, accounting firms, and municipalities, automates much of the process.

With Awditify's AI bank feed categorization, every transaction is automatically tagged with the appropriate tax code. For New Brunswick businesses, the system applies the 15% HST to taxable sales and expenses. You can see your net HST liability in real-time on customizable dashboards. The platform generates over 70 financial reports, including a detailed GST/HST report that summarizes amounts collected, paid, and due.

Awditify also tracks deadlines based on your filing frequency and sends reminders. You can export the data directly for filing with the CRA. If you work with an accountant, they can access your file through Awditify's client portal and review before submission.

For accounting firms managing multiple NB clients, Awditify's practice management tools let you handle all HST filings in one place, with WIP tracking and trial balance integration. Municipalities in NB also use Awditify for property tax billing and utility billing, which requires careful HST handling.

To see how Awditify can streamline your HST process, visit the Awditify for Small Business page.

FAQ

What is the HST rate in New Brunswick?

The HST rate in New Brunswick is 15%, which is the sum of the 5% federal GST and the 10% provincial portion. This applies to most taxable supplies of goods and services made in the province.

How often do I need to file HST in New Brunswick?

Your filing frequency is determined by the CRA based on your annual taxable revenues. Businesses with revenues under $1.5 million may file annually. Between $1.5 million and $6 million, quarterly. Over $6 million, monthly. You can also request a different frequency from the CRA.

Can I claim input tax credits on vehicle expenses?

You can claim ITCs on the HST paid for vehicle expenses if the vehicle is used more than 50% for business. You need to track the business use percentage and keep receipts. Capital cost allowance (CCA) calculations also affect ITCs.

What are the penalties for late HST filing?

The late filing penalty is 1% of the amount owing plus 25% of that 1% for each full month late, up to 12 months. Interest also accrues on overdue amounts. The current interest rate is set quarterly by the CRA.

Does Awditify automate HST filing for NB businesses?

Yes, Awditify tracks HST on every transaction using AI categorization, calculates net tax owing, and generates reports ready for filing. It also sends reminders for upcoming deadlines. You can see the full process in the How to Use Sales Tax guide.

What to Do Next

Understanding HST filing rules for New Brunswick businesses is the first step toward avoiding costly penalties and keeping your books clean. Whether you are a small business owner, a bookkeeper, or an accounting firm serving NB clients, having a system that automates tax tracking and ensures accuracy is essential. Awditify is built for Canadian tax requirements, from HST to GST/HST and beyond. Ready to simplify your compliance? Book a demo to see Awditify in action.