Updated Checked by the Tax-Services.ca editorial team How we check
A CPA firm is worth paying for when someone outside your business has to trust your numbers: a lender, an investor, a buyer or a government body. For tax filing and bookkeeping alone, you don’t need the CPA designation at all. Work out which of those two situations you’re in, because it saves real money.
What does a CPA firm do that others don’t?
Two things. The first is public accounting, meaning work where the accountant puts a name to a report about your finances. In Canada that work is tied to a provincial licence. CPA Canada says the accounting profession is regulated by province, and that the requirements for public accounting registration are set in provincial law. The second is the designation itself, which comes with a regulator that can discipline members.
The financial statement work comes in three levels, set by Canadian standards. A compilation is the lightest: the accountant organizes what you give them and doesn’t check it. A review is a step up, using questions and analysis. An audit is the deepest and gives the most assurance. The standards for the first two are named CSRS 4200 and CSRE 2400, and CPA Canada publishes guidance on both.
Which level does my lender or buyer want?
That’s set by the person asking, so ask them in writing what they accept before you pay for anything. We couldn’t find an official rule that says which loan size needs which level. Some accounting firms’ blogs offer dollar cut-offs, but they disagree in detail and we didn’t rely on them.
| Level | What the CPA does | Who might ask for it |
|---|---|---|
| Compilation | Organizes your figures, no checking | Some lenders, landlords, your own records |
| Review | Questions and analysis, limited assurance | Some lenders, some shareholder agreements |
| Audit | Testing and evidence, highest assurance | Larger lenders, investors, legal requirements |
The third column is a pattern. Not a rule. Your lender’s own checklist wins.
Picture Dev in Calgary, who runs a small landscaping company and wants a bigger equipment loan. His banker asks for “accountant-prepared statements” and nothing more. Dev phones back and asks one question: which level, and signed by whom? The answer is a compilation, so he skips the far pricier audit he’d half expected to buy. One phone call, and the guesswork is gone, eh.
How can I tell if it’s a real CPA firm?
Look the firm up in the directory of your provincial body. CPA Ontario publishes member, firm and public accounting licence directories, and it warns that a listing on its own doesn’t guarantee a current licence or membership. Read the status, and the date next to it, before you sign anything or send a single document. If the person signing your statements doesn’t hold a licence to do public accounting in your province, ask why.
Watch the word “CPA” when it’s used loosely, since it’s easy to hear it as more than it is. Someone can hold the designation and still not be licensed to sign a review or an audit.
What will corporate tax look like with a CPA firm on board?
The firm files your T2 and sets the year end, but the tax itself follows the rates. For a Canadian-controlled private corporation in Ontario with $200,000 of taxable business income, our corporate tax calculator gives $23,392 for calendar 2026: $18,000 federal (the 9% small business rate) and $5,392 provincial. That’s an average of 11.7%, and about $176,608 stays in the company. The Ontario piece blends the rate before and after 1 July 2026, so we’d call it an estimate.
What the calculator leaves out is what a firm is actually good at: the things checked by hand, such as taxable capital and credits. The calculator has boxes for associated companies sharing one limit and for passive income. To see what paying yourself in dividends looks like, use the dividend tax calculator. If you’d rather take salary, the payroll deductions calculator shows what comes off.
Do I need a CPA firm for my personal tax return?
Almost never. A T1 for an employee, a pensioner or a student doesn’t need a signed report, and plenty of free and low-cost routes exist. A CPA firm starts to make sense for a personal return only when it’s tangled: a business, a sale of a rental property, foreign income, or an estate to wrap up. Even then it’s the situation that decides, not the letters after the name. The income tax calculator gives you a rough personal figure to compare against whatever a firm quotes.
What can go wrong?
You can overbuy. That’s the easy mistake. A one-person consulting company that never borrows may never need a review. You can also underbuy. Skip proper statements for three years because nobody asked, and you may find out the hard way, on the day your bank reviews your line of credit and wants something a licensed accountant has signed, that a shoebox of receipts won’t do. Ouch.
Scope is the other trap, and it catches people who only compare the headline fee and never read what’s included. Ask what the fee covers, whether the CRA correspondence is included, and who signs. We couldn’t confirm what firms charge, so we can’t tell you a fair number. Get two written quotes for the same scope and compare them line by line. Also ask who you’d call in a pinch, because a partner who answers in March is worth more than a cheaper one who doesn’t.
Have your records in shape first. Six years is the usual CRA retention period, and a firm working from messy books will take longer and bill for it. If your bank statements haven’t been reconciled since spring, fix that before the first meeting.
How we checked the figures
Regulation and licensing points come from CPA Canada and CPA Ontario pages, and the standards names from CPA Canada’s audit and assurance pages, read in September 2026. The corporate tax example is from our calculator using 2026 federal and Ontario data. The Ontario rate is derived, not printed as a single published figure. We don’t recommend any firm, and this site isn’t connected to CPA Canada or any government body.
Frequently asked questions
What is the difference between a compilation, a review and an audit?
A compilation organizes your numbers without checking them. A review adds questions and analysis for limited assurance, and an audit tests the figures for the highest assurance.
Do I need a CPA to do my taxes?
No. Tax preparation and bookkeeping do not require the CPA designation. It matters when a lender or buyer wants statements signed by a licensed accountant.
How do I check that a CPA firm is licensed?
Use the directory of your provincial CPA body. CPA Ontario, for instance, lists members, firms and public accounting licences.
Which level of statements does my bank want?
Only the bank can say. We found no official rule tying loan size to a level, so ask for its requirements in writing.
What does a CPA firm cost?
We could not confirm typical fees. Ask for a written quote that lists what is included.
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