You just closed a good month, revenue is finally climbing, and somewhere in the back of your mind sits a nagging question: should you be charging HST yet? The rule is simpler than it sounds. Once your business earns more than $30,000 in taxable sales over four consecutive calendar quarters, you have to register for GST/HST and start charging Nova Scotia’s 14% rate on top of your prices. Miss that point and the CRA still expects you to remit the tax you should have collected, out of your own pocket if you did not charge it.

What Counts Toward the $30,000 Threshold

The Canada Revenue Agency calls a business under this line a small supplier, and the moment you cross $30,000 in revenue from taxable sales across any four consecutive calendar quarters, not a calendar year and not your fiscal year, you stop qualifying. Total revenue is what counts, not profit. A contractor billing $32,000 in a slow, thin-margin year still crosses the line the same as one billing $32,000 with plenty of profit left over. Most goods and services you sell count as taxable supplies. A short list of things, like most health, dental and financial services, are exempt and do not count toward your total, so check the CRA’s own guidance on small suppliers if your business sits in one of those categories before you assume you are close to the threshold.

Nova Scotia’s HST Rate Is 14%, Not 15%

If you learned Nova Scotia’s HST rate a few years ago, update that number. On April 1, 2025, the province cut the provincial portion of the HST by one point, bringing the combined rate down to 14% from 15%. If you are already registered and still quoting 15% out of habit, fix your invoice templates and your point-of-sale settings now. If you are about to register for the first time, 14% is the number to build into your pricing from day one.

What if I have been charging the old rate by mistake?

Correct it going forward and remit whatever you actually collected, not what you should have collected at the right rate. CRA calculates what you owe based on real transactions, so an honest mistake corrected quickly is a smaller problem than one left running for months.

How Soon You Actually Have to Register

Timing depends on how you cross the line. If one single quarter pushes your trailing four-quarter total over $30,000, your registration date is the day of the sale that put you over, and you have 29 days from that point to register. If you creep over the threshold gradually across several quarters, you stop being a small supplier at the end of the month following the quarter where you crossed it, and the same 29-day window applies from there. Either way, the clock starts the moment you cross the line, not whenever you get around to checking your books.

How to Register for GST/HST, Step by Step

1. Add up your taxable revenue for the trailing four calendar quarters and compare it to $30,000.
2. If you are over, or expect to be soon, go to Business Registration Online through canada.ca. It is the fastest way to register and it costs nothing.
3. Have your SIN, business name and structure, business address, and an estimate of your annual revenue ready before you start.
4. Register your Business Number and GST/HST account in the same session. They come as a pair.
5. Save or print your Business Number immediately. The CRA will not mail it to you.
6. Update your invoices, point-of-sale system or online store to charge 14% HST starting the day your registration takes effect.
7. If your revenue has not hit $30,000 yet but you want to register anyway, to claim input tax credits on business purchases, you can register voluntarily at any point.
8. Confirm your assigned reporting period, covered next, and mark your first filing deadline somewhere you will actually see it.

What Reporting Period You Will Be Assigned

CRA sorts you into a reporting period based on your revenue from the previous fiscal year. Businesses earning $1.5 million or less file annually, the bracket almost every small Halifax business falls into. Revenue between $1.5 million and $6 million means quarterly filing, and anything above $6 million means monthly. You can always choose to file more often than your assigned period if you would rather remit in smaller, more frequent chunks instead of one larger annual bill.

When is your first return actually due?

This is where the calendar gets specific, and it trips people up. If you are a sole proprietor with a December 31 year end, your payment is due April 30, but your return itself is not due until June 15, a six week gap between paying and filing that catches a lot of first-time registrants off guard. If you are incorporated with a December 31 year end, both the payment and the return are due March 31, three months after your fiscal year closes, with no gap between the two dates.

What This Costs in Time and Money

Registering itself costs nothing and takes about fifteen minutes online if you have your information ready. The real cost shows up afterward: tracking HST collected on sales against HST paid on business purchases, and filing on schedule. Some owners handle this themselves in a spreadsheet for the first year or two. Others hand it to a bookkeeper once the transaction volume makes manual tracking a weekly chore instead of a monthly one. If you want a free second opinion on whether your bookkeeping setup can handle this before you register, Halifax Partnership’s business advising is worth a call, and it costs nothing.

Getting This Right Before CRA Tells You To

Crossing $30,000 is a sign your business is working, not a problem to dread. Treat the registration and the rate change as a checklist item you handle on your own schedule, not something you find out about from a CRA notice with penalties already attached. If you have not yet registered the business itself with the province, that step comes first, since you will need your legal business name and structure sorted before CRA asks for them. If growth also has you thinking about your first hire, that has its own checklist worth reading before you post a job ad. For more on running a business here, the Halifax Business Blog has other posts worth a look.

There is a small insurance wrinkle worth flagging here too, from someone who deals with this daily. Crossing this kind of revenue line usually means your business has grown past what your original policy was built to cover, so it is worth a quick check that your limits kept pace with your sales.

About the author. Rayanur Rahman writes about running and growing a business in Halifax. He is a commercial insurance broker with Western Financial Group in Bedford, Nova Scotia, and works with businesses of every kind across the Halifax Regional Municipality. Reach him at 902-321-1712 or book a 30 minute call.

Sources: Canada Revenue Agency: When to register for and start charging the GST/HST. Canada Revenue Agency: Charge and collect the GST/HST. Canada Revenue Agency: Register for a GST/HST account. Canada Revenue Agency: GST/HST reporting requirements and deadlines. Photo by Mikhail Nilov on Pexels. Photo by Nataliya Vaitkevich on Pexels. Photo by Polina Tankilevitch on Pexels. Prices and program details checked September 2026 and can change. General information only.