How these calculators are built and maintained

Where the numbers come from

Every rate, threshold and grading scale on this site is taken from the organisation that sets it, not from another calculator and not from a summary article. That distinction matters more than it sounds, because errors in this field propagate: one site rounds a rate, three others copy it, and within a year the wrong figure looks like consensus.

• Sales tax rates come from the Canada Revenue Agency's own rate table
• Quebec's QST rules come from Revenu Québec, which administers both taxes in that province
• Benefit amounts and thresholds come from Service Canada and the relevant provincial ministry
• Immigration point grids come from IRCC and the provincial programme's own published grid
• University grading scales come from each institution's registrar or academic calendar

Each tool lists its own sources at the bottom of the page, linked directly to the specific page we read rather than to a department's home page. If a figure has no source we can link, the tool does not ship.

What these tools deliberately do not do

• They do not give tax, legal, financial, medical or immigration advice
• They do not decide eligibility for any programme — only the administering body can
• They do not send anything you type to a server, so nothing can be stored or sold
• They do not require an account, an email address or a phone number
• They do not model your marginal tax rate, your full financial position or your case history

Where a calculation is genuinely an approximation rather than a rule — some grade conversions, some benefit estimates — the page says so in the copy rather than burying it in a footnote.