Updated Checked by the Tax-Services.ca editorial team How we check
Canadian accounting research databases split into free public ones and paid ones. For tax and law, the free set is enough for most questions: the Justice Laws website for statutes, CanLII for court and tribunal decisions, the CRA’s folios for its official positions and SEDAR+ for public company filings.
Paid platforms exist too, and we’ll say what we could and couldn’t check about them further down.
Which free databases should you try first?
Start with the law itself. The Justice Laws website carries the consolidated Income Tax Act and its regulations, free, in HTML, XML and PDF. When we looked in September 2026, the Act was current to 21 September 2026 and had last been amended on 18 June 2026. Read that “current to” line every time, because a copy saved last year may be wrong.
Next is CanLII. It’s a non-profit that the Federation of Law Societies of Canada set up in 2001, and it gives free public access to court judgments, tribunal decisions, statutes and regulations from across Canada. If you want to know how a court read a section of the Act, this is where you look.
Then the CRA’s own technical pages. Income Tax Folios explain how the agency reads parts of the Act, and they’re sorted into seven series with chapters by topic.
What does each one answer?
| Question | Database | Cost |
|---|---|---|
| What does the section say? | Justice Laws website | Free |
| How did a court decide a dispute? | CanLII | Free |
| What does the CRA say it will do? | Income Tax Folios, guides, circulars | Free |
| What did a listed company report? | SEDAR+ public search | Free to search |
| Academic papers on accounting | Paid article databases | Not confirmed |
Think of it as a ladder. The statute is the rule, the folio is the agency’s reading of it, and a court decision is what happens when somebody disagrees. Climb them in that order and you’ll rarely get lost.
Can you look up a public company’s financials?
Yes, through SEDAR+, the filing system run by the Canadian Securities Administrators. You don’t need an account for the public search, and you can look up an issuer’s profile and its filings. It only covers companies that report to the securities regulators. Your local plumber and your corner store aren’t in it, and neither is most of the private economy.
Financial statements in these filings come with notes, and the notes are often where the useful part sits: how revenue is recognised, what the auditor said and which estimates could move. Read those before the headline numbers.
What about paid databases and journals?
Commercial platforms for accounting and tax research are sold to firms and universities, and a public or university library may give you access to some of them. We didn’t verify what any particular platform holds, what it costs or which libraries offer it, so we can’t recommend one. The same goes for professional bodies’ research libraries. Some material there may be open to everyone and some limited to members, and we couldn’t confirm the split.
So do the free pass first. If the Act, a folio and a CanLII search leave your question open, then ask a librarian what’s available. Librarians at university and larger public branches field this kind of request all the time, and asking costs nothing.
A quick example of how they work together
Suppose you’re a sole proprietor wondering how records must be kept for your business. A folio or CRA page states the rule. The Act says where it comes from. CanLII might show a case where someone lost a claim for lack of records. Once you’ve got the rule, run your own figures, for instance through the self-employed tax calculator, the income tax calculator or the corporate tax calculator.
Take Priya, who drives for a delivery service in Mississauga and wonders whether her mileage log is good enough. She reads the CRA’s page first, glances at the Act for the wording, then runs a quick CanLII search on “mileage log” to see how tribunals have treated thin records. Twenty minutes, no subscription fee, a few bucks saved, and she knows what to fix.
What are the limits of these databases?
A court decision is about one set of facts, and it may be appealed. A folio is the CRA’s position, not a law. And a database that hasn’t been updated can sit there looking official. Check the date on everything, and don’t assume a case is still good law because it’s the first hit.
Search engines are no substitute either. They happily serve a blog post from 2019 above the current statute, so go to the source first and the commentary second.
Where we got these figures
We read the Justice Laws page for the Income Tax Act, the CRA‘s folio pages, and public descriptions of CanLII and SEDAR+ in September 2026. CanLII’s own site blocked our automated check, so its description comes from search results, and we’ve kept that part short. This site isn’t linked to any of these bodies.
Frequently asked questions
Is the Income Tax Act free to read online?
Yes. The Justice Laws website carries the consolidated Act and its regulations free, and shows the date it is current to.
What is CanLII?
A non-profit set up by the Federation of Law Societies of Canada that gives free public access to judgments, tribunal decisions, statutes and regulations.
Can I search a public company's filings for free?
SEDAR+ has a public search that needs no account. It only covers companies that report to securities regulators.
Are there paid accounting databases?
Yes, but we couldn't verify what any platform holds or costs, so we don't name one. A library may be able to tell you what it offers.
Does a court decision settle a tax question?
Not by itself. It's about one set of facts and may have been appealed, so check the date and the outcome.
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