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Canadian tax guides: how it works and how to file

Updated Checked by the Tax-Services.ca editorial team How we check

Tax questions come one at a time, so these guides do too. Each takes a single topic, such as how income tax is worked out, how to file a return, or how sales tax is split between Ottawa and the provinces, and walks through it in plain English from the top. They’re written for people who have never read a CRA page for fun, which is most of us.

Start where your question is. If you aren’t sure how the whole system hangs together, begin with the guide to how Canadian income tax works, because the difference between your marginal rate and your average rate comes up everywhere else. A few weeks from the deadline? Go straight to the filing guide. Working for yourself, or thinking about it? There’s a guide for the day nobody withholds your tax any more.

Every guide links on to the calculators and articles behind it, so you can read how a rule works and then try it on your own numbers. Nothing you type leaves your browser, and nothing needs signing up for. By the end of a guide you should know what the rule is, which forms and dates go with it, and what to ask if your own case is a bit unusual. We don’t prepare or file returns here. This is a place to understand your taxes, not to hand them over.

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Where do you want to start?

Nobody needs to read all of these. Every guide points to the next step, so you can stop the moment your question is answered. Most people read two or three, and some only need one paragraph, which is fine too.

Which guide should you read first?

It depends on what’s sitting on your desk. Got a T4 and no idea what to do with it? Start with the filing guide. Just landed from abroad? The new to Canada page covers the first-year surprises. Living on a modest income and wondering what you might be owed? The benefits and credits guide covers payments like the GST/HST credit, which became the Canada Groceries and Essentials Benefit in July 2026.

Not sure where you fit? Read the income tax guide first. It’s the one the others lean on, and its ideas, like brackets and credits, come back in every other guide.

Looking for a number or a date?

The limits and rates page has the figures people look up most, like this year’s RRSP limit and the federal brackets, with the source printed next to each. The tax calendar has the dates. For most people, filing and paying are both due April 30. If you or your spouse is self-employed, the filing date is June 15, but any tax owing is still due April 30, as the CRA’s due dates page sets out.

Not sure which guide fits? The life events pages start from what’s happening to you, such as a new job, a baby or a move, and the checklists print on one sheet. If a word stops you mid-sentence, the glossary explains it in a line or two.

Would you rather work it out than read about it? The calculators cover pay, income tax, sales tax, mortgages and savings for every province. Nothing you type leaves your browser, and nothing needs signing up for.

What we are and aren’t

We’re an independent publisher. We don’t prepare or file tax returns, and we can’t advise on your own situation because we’ve never seen it. The figures come from the CRA, Revenu Québec and provincial pages, and the how we check rates page describes the routine.

Tax rules change, rates get indexed, and a page that was right in January can be a little off by autumn, which is why every page shows the date it was last checked and the source behind each figure.

Who writes and checks all of this? The editorial team page has the answer.

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Frequently asked questions

Are these guides tax advice?

No. They are general information. Your own situation can change the answer, and the notice of assessment from the CRA is what settles what you owe.

Where do the figures come from?

From CRA, Revenu Québec and provincial government pages. Each calculator and the limits page lists the source and the date we checked it.

How often are the guides updated?

The date at the top of each page shows when it was last checked. Rates and limits are checked again every January.

Do you offer tax services?

No. We don't prepare or file returns, and we don't offer tax, legal or accounting services. The guide on choosing a preparer explains what to ask the people who do.

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