GST/HST Calculator Canada

The GST/HST calculator is a free, browser-based tool that adds or removes Canadian sales tax for any province or territory. Pick the province, enter an amount, and it applies the correct combined rate — 5% GST alone in Alberta, 13% HST in Ontario, 14% in Nova Scotia — and shows the tax and pre-tax amounts separately.

How the GST/HST Calculator Works

The GST/HST calculator for Canada is a free browser-based tool that computes federal and provincial sales tax for all 13 provinces and territories. Canada uses three types of sales tax depending on the province: GST (Goods and Services Tax) at 5% federally, HST (Harmonized Sales Tax) which combines GST and provincial tax into a single rate, and PST (Provincial Sales Tax) which is charged separately from GST in some provinces. Based on 2026 rates from the Canada Revenue Agency, this calculator handles all three systems automatically when you select your province.

GST, HST, and PST Rates by Province

Five provinces charge HST: Ontario at 13%, Nova Scotia at 14%, and New Brunswick, Newfoundland and Labrador, and Prince Edward Island at 15%. Four provinces charge GST plus a separate PST: British Columbia (5% GST + 7% PST = 12%), Saskatchewan (5% GST + 6% PST = 11%), Manitoba (5% GST + 7% PST = 12%), and Quebec (5% GST + 9.975% QST = 14.975%). Alberta, Northwest Territories, Nunavut, and Yukon charge only the 5% federal GST with no provincial sales tax. Quebec calls its provincial tax QST (Quebec Sales Tax) and administers it through Revenu Quebec rather than the CRA.

Add Tax vs Remove Tax: Which Should You Use?

Use "Add tax" when you know the pre-tax price and want to calculate the final amount including all applicable sales tax. This is the standard mode for pricing goods and services. Use "Remove tax" when you have a receipt total and want to determine how much of that total was tax versus the original price. The reverse calculation divides by (1 + combined tax rate) rather than multiplying, which gives you the exact pre-tax amount and tax paid. This is useful for expense reports, bookkeeping, and filing GST/HST returns with the CRA.

When Do You Have to Register for GST/HST? The $30,000 Small Supplier Threshold

Charging GST/HST is not optional once you cross a line, and the line is $30,000 in taxable supplies. You stop being a “small supplier” the moment your worldwide taxable revenue exceeds $30,000 measured either over four consecutive calendar quarters or within a single calendar quarter — and the two tests bite differently. Cross it inside one quarter and you must start charging tax immediately on the sale that pushed you over, with registration required by the end of the following month. Cross it gradually across four quarters and you get a one-quarter grace period before you must be registered. Miss it and the CRA still assesses the tax you should have collected, out of your own margin, plus interest — which is why the $30,000 figure is worth tracking monthly rather than at year end. Two things people get wrong: the threshold is gross revenue, not profit, and it counts zero-rated supplies (exports, basic groceries) even though you charge 0% on them. Registering voluntarily below $30,000 is often worth it anyway, because only a registrant can claim input tax credits to recover the GST/HST paid on business purchases — for a new business buying equipment, that refund frequently exceeds the tax collected. If your taxable sales are $400,000 or less including tax, ask about the Quick Method: you remit a flat percentage of your tax-included revenue instead of tracking every input tax credit, which for a low-expense service business usually leaves money on the table in your favour. Rates and thresholds here follow CRA Guide RC4022, General Information for GST/HST Registrants; confirm current figures on the Canada Revenue Agency website before you register.

Which Province's Rate Applies? Place-of-Supply Rules

The rate is not set by where your business sits — it is set by where the customer receives the good or service, under the CRA's place-of-supply rules. Ship a product from an Alberta warehouse to a customer in Halifax and you charge Nova Scotia's 14% HST, not Alberta's 5% GST. For goods, the deciding factor is the province the item is delivered to or made available in. For most services and digital products sold to consumers, it is the customer's home address as shown in your ordinary business records. Two consequences catch small sellers out. Cross-border e-commerce inside Canada means you may charge five different rates in one day, so the province selector matters more than the amount you type. And a rate change takes effect on the transaction date, not the invoice date — Nova Scotia's cut from 15% to 14% on 1 April 2025, the province's first change since 2010, applied by when the supply happened, so orders placed in March and delivered in April had to be checked individually. If you are correcting historical invoices, use the rate in force on the date of supply, not today's. The Canada Revenue Agency publishes the current table and the place-of-supply rules in full. Updated 2026-08-03.

Quick Method vs Regular Method: Which GST/HST Calculation Saves You More?

The rate this calculator applies is the regular method — you charge the full GST/HST, claim Input Tax Credits on what you paid, and remit the difference. Small businesses have a second option that often remits less. Under the CRA's Quick Method, you still charge customers the full rate, but you remit a lower flat percentage of your GST/HST-included revenue and stop tracking ITCs on operating expenses. You qualify if your worldwide annual taxable supplies, GST/HST included, are $400,000 or less, and you elect using Form GST74. The remittance rate depends on your province and whether you mainly sell services or resell goods — an Ontario service business remits about 8.8% of HST-included revenue instead of the full 13%, and a goods reseller about 4.4%. You also get a 1% credit on the first $30,000 of eligible supplies each fiscal year, and you can still claim ITCs on capital purchases such as a computer or vehicle. The catch: it is barred for accountants, bookkeepers, lawyers, financial consultants, listed financial institutions and charities, and it loses money for any business with heavy taxable expenses, because those ITCs are what you give up. Rule of thumb — a service business with low overhead usually wins, a reseller with large inventory purchases usually does not. Run both numbers with the GST/HST Quick Method calculator, and confirm your exact remittance rate in CRA guide RC4058. Updated 2026-08-11.

How Often You File, and the 29-Day Clock After You Cross $30,000

Knowing the rate is only half the job. Two timing rules decide whether you owe interest and penalties, and both catch new registrants out.

Registration timing depends on how you crossed the threshold. If you exceed $30,000 in a single calendar quarter, you stop being a small supplier immediately — on the supply that took you over. You must charge GST/HST on that very supply, and you have 29 days from that day to apply for a number. If instead you exceed $30,000 cumulatively across four consecutive quarters without any single quarter going over, you remain a small supplier for one further month, then must register, again within 29 days of your first taxable supply after that. The common and expensive mistake is treating the threshold as a year-end test: by the time you notice, you have been making taxable supplies without collecting tax, and the CRA still expects the tax on them — out of your own margin.

Filing frequency is assigned by revenue, not chosen freely. Annual taxable supplies of $1.5 million or less default to annual filing; above $1.5 million up to $6 million defaults to quarterly; above $6 million is monthly. You can always elect to file more often than your default, which is worth doing if you are in a refund position because input tax credits come back sooner. Monthly and quarterly filers must file and pay within one month of the period end. Annual filers generally file within three months of their fiscal year end, with the exception that a self-employed individual with a 31 December year end files by 15 June while the payment is still due 30 April. Annual filers whose net tax exceeds $3,000 also have to make quarterly instalments through the year rather than one payment at the end.

Note that filing and paying are separate obligations: a nil return still has to be filed, and filing on time with no payment still accrues interest. Current thresholds, due dates and the election forms are set out by the CRA under GST/HST reporting periods. Updated 2026-08-30.

Tips for Canadian Business Owners

Businesses with annual revenue over $30,000 must register for a GST/HST account and charge the applicable tax. You can claim Input Tax Credits (ITCs) to recover the GST/HST paid on business expenses. Small suppliers under the $30,000 threshold can voluntarily register to claim ITCs. File your GST/HST return quarterly or annually depending on your revenue level. Keep all receipts showing the tax paid, as the CRA may audit your ITC claims. Last updated: April 2026.