Free Canadian Tax Calculators & Guides

Unincorporated and wondering whether to incorporate? Start with the incorporation savings estimator — it shows the tax you could defer by leaving profit inside a corporation at the small-business rate instead of taking it all personally — then read the sole proprietor vs corporation guide for the liability and paperwork side, which the numbers alone don’t capture.

Already incorporated? The biggest recurring decision is how to pay yourself. Our salary vs dividends guide walks through the trade-offs — CPP, RRSP room, payroll obligations and integration — and where a calculator stops being enough and a conversation starts.

Charging or paying GST/HST? The GST/HST calculator adds or strips sales tax for any province — useful for quoting jobs tax-inclusive and reconciling invoices — and the CRA deadlines page keeps the filing dates straight.

A calculator is a starting point, not an answer: every figure depends on your province, your other income and your corporation’s situation. When a number surprises you, that’s usually the moment to talk it through with a CPA — the consult is free and the quote is fixed. For the year-end close specifically, a free email course walks the work through in five short lessons.

To hear when any of these figures change, the monthly Tax Memo covers what moved and what to do about it.

Filed late, or about to? The penalty calculator for late T1 and T2 returns shows what the CRA charge actually is, with the formula visible.