Corporate Tax

HST combines the 5% federal GST with a provincial component in five participating provinces. For 2026 the combined rates are 13% in Ontario, 15% in New Brunswick, Newfoundland and Labrador, and Prince Edward Island, and 14% in Nova Scotia since 1 April 2025. Elsewhere you charge the 5% GST alone, or GST plus a separate provincial tax. The rate follows the province of supply, not where your business sits.

Income up to the basic personal amount is effectively untaxed, because that credit offsets the federal tax on it, and each province and territory has its own equivalent amount. Both figures change every year with indexation, so look up the amount for the tax year in question. Other credits, such as the age amount, tuition, or the disability amount, lift the point where tax actually starts. Tax withheld at source below that point comes back as a refund.

A write-off is simply a deductible expense. You subtract it from the income it helped earn, so the saving equals the expense multiplied by your marginal tax rate, not the full amount spent. To qualify, the cost must be incurred to earn business or employment income, be reasonable in amount, and be backed by a receipt. Purely personal costs never qualify, and mixed-use items such as a vehicle or a home office are split by business-use proportion.

No single figure describes it, because the total turns on income, province of residence, family situation and the credits claimed. A typical household pays federal and provincial income tax, Canada Pension Plan or Quebec Pension Plan and Employment Insurance contributions, GST or HST on most purchases, municipal property tax directly or through rent, plus fuel and excise taxes. Your own income tax for a year is set out on the notice of assessment the CRA issues.