This free Northwest Territories sales tax calculator starts from the province's 5% combined rate. Add tax to a net price, or work backwards from a tax-inclusive total. 5% federal GST only — no territorial sales tax.
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Combined rate: 5% — 5% federal GST only — no territorial sales tax.
Combined rate verified October 2026 · Source: Canada Revenue Agency — Charge and collect the GST/HST
Tax is the part of the price most people get wrong, because the headline rate is rarely the whole story: in Canada the combined rate hides two different taxes, and in PST provinces the provincial tax covers a narrower range than the GST. This calculator starts from the general combined rate — and if your item qualifies for a different treatment, type that rate in and it calculates it instead.
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See all provinces and territories, try the tax calculator for any rate, or put the result on a free invoice. More province calculators: Newfoundland And Labrador · Nova Scotia.