A variable cost is an expense that rises and falls in direct proportion to how much a business produces or sells, such as raw materials and shipping.
Variable costs change with output: sell more and they rise, sell less and they fall. Typical examples are raw materials, direct labour paid by the unit, packaging, shipping and payment processing fees. They contrast with fixed costs that stay constant regardless of volume.
The gap between a product's price and its variable cost per unit is the contribution margin, the amount each sale contributes toward covering fixed costs and then profit. Understanding variable costs is essential for pricing, break-even analysis and deciding whether an additional order is worth taking.
Each product a company sells costs $6 in materials and shipping (variable) and sells for $10. The $4 contribution margin per unit goes toward covering fixed costs, and then to profit once those are met.
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A tax return is the annual filing that reports your income, deductions and credits to the CRA so the final tax for the year can be settled. Payers withhold tax during the year and the return reconciles that against what you actually owe, producing either a refund or a balance to pay. For 2025 returns filed in 2026, refunds usually arrive in about two weeks for an online return, while a paper return runs on a considerably longer standard because it is handled manually.
Property tax is an annual municipal levy on real estate, charged by the city or town where the property sits rather than by the CRA. The bill is the assessed value of the property multiplied by the tax rate the municipality sets each year, and it funds local services such as roads, waste collection, policing and the education portion the province adds. Assessed value is set by a provincial assessment authority, so it is not the price you paid.
Not everyone owes income tax, though almost everyone touches the system. Income tax starts once taxable income passes your personal credits; the federal basic personal amount for 2026 is $16,452, tapering to $14,829 at higher net income. Filing still matters with nothing owing, because benefits and credits are calculated from the return. Sales tax, payroll contributions and fuel or tobacco taxes reach people who pay no income tax at all.
Canadian sellers advertise pre-tax prices and add GST, HST or provincial sales tax at the till. Nothing requires tax-included pricing, rates differ by province, and taxability depends on what is sold: one trip to the till can mix fully taxable goods, zero-rated goods such as basic groceries, and exempt supplies. Fuel is the exception — the price posted at the pump already contains the fuel taxes and the GST or HST, so nothing is added when you pay.
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Reviewed and fact-checked by Udit Gupta
Ex Big 4 — Ernst & Young, Deloitte · International & cross-border tax specialist · CPA Canada (In-Depth Tax Program) · Chartered accountant, ICAI & MIA
Udit Gupta has over 15 years of experience helping corporations and business owners with corporate structuring, corporate tax filing, bookkeeping, payroll, GST/HST, cross-border tax and CRA representation. Big 4 trained at Ernst & Young and Deloitte, and qualified as a chartered accountant in India and again in Malaysia, he founded his accounting practice in 2014 to serve entrepreneurs, startups and non-resident business owners across Canada. View full member bio.
The Institute of Chartered Accountants of India — member 521458 · Malaysian Institute of Accountants — member CA 44667 · Ex Big 4: Ernst & Young, Deloitte · CPA Canada (In-Depth Tax Program), completed 19 Dec 2023 · In-Depth GST/HST Part I, 12 Jul 2022 · Part II, 5 Jul 2023
Editorial policy. Every page is researched against primary sources — the Income Tax Act, CRA publications and CPA Canada guidance — and every rate or threshold is stated with the tax year it applies to.
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