Sooner or later a lender, investor, landlord, or surety asks your business for "financial statements prepared by an accountant." It sounds like a single deliverable. It isn't. A CPA can prepare statements at three different levels — a compilation, a review, or an audit — and they are genuinely different products, governed by separate professional standards, offering different degrees of confidence to whoever's reading them.
The difference is assurance: how much independent work the CPA does to stand behind the numbers. More assurance means more procedures, more time, and more cost. The classic, expensive mistakes are (1) ordering a compilation when the lender actually required a review or audit, and (2) using the old term "Notice to Reader," which was retired and replaced in 2021.
- Three engagements, three levels of assurance. Compilation = no assurance; Review = limited assurance; Audit = reasonable (high) assurance.
- Compilation (CSRS 4200): the CPA assembles your numbers into statements without verifying them. Cheapest, fastest, no opinion.
- Review (CSRE 2400): the CPA performs enquiry and analysis and concludes that nothing came to their attention suggesting the statements are materially misstated. Middle cost.
- Audit (CAS): the CPA tests and gathers evidence to give a positive opinion that the statements present fairly. Most thorough and most expensive.
- "Notice to Reader" is gone. Effective for periods ending on or after December 14, 2021, CSRS 4200 replaced it with the Compilation Engagement Report, with new disclosures (basis of accounting, independence, restricted use).
Read on for what each level actually involves, the cost ladder, the new compilation rules, a real example of ordering the wrong one, and how to ask correctly.
Three levels of assurance
Think of it as a ladder of confidence. At the bottom, the accountant simply puts your information into the standard format and checks nothing. At the top, the accountant independently tests the numbers and signs an opinion a stranger can rely on. Each rung up adds work — and cost.
Source: CPA Canada, CSRS 4200, Compilation Engagements — guidance resources. Review engagements are governed by CSRE 2400 and audits by the Canadian Auditing Standards (CAS), in the CPA Canada Handbook.
Compilation (CSRS 4200) — no assurance
In a compilation, the CPA assembles financial information you provide into properly formatted statements. They don't verify it, don't test it, and express no assurance — the statements rest on management's information. It's the lowest-cost option and is common for owner-managed businesses that mainly need tidy statements for internal use, for filing a corporate tax return, or for a lender who's comfortable without assurance.
What changed: the old "Notice to Reader" compilation was replaced by CSRS 4200 for periods ending on or after December 14, 2021. The new Compilation Engagement Report requires more than the old boilerplate — notably a note describing the basis of accounting used, a statement about the practitioner's independence, and wording that the statements may be appropriate only for certain users (restricted use). So if you (or your bank) still say "send me an NTR," the correct, current deliverable is a Compilation Engagement Report.
Source: CPA Canada, The New Compilation Engagements Standard (CSRS 4200).
Review (CSRE 2400) — limited assurance
A review is a step up. The CPA performs enquiry and analytical procedures — asking questions, comparing figures, probing what looks unusual — enough to give limited (negative) assurance: a conclusion that nothing came to their attention that would suggest the statements are materially misstated. It's not a full audit, but it gives an outside reader meaningfully more comfort than a compilation. Many lenders require a review for mid-sized borrowing.
Audit (CAS) — reasonable assurance
An audit is the top rung. The CPA tests the numbers, examines controls, and gathers evidence to express a positive opinion — reasonable (high) assurance that the statements present fairly in accordance with the applicable framework. It's the most rigorous and most expensive, and it's what's required for many larger entities, certain regulated or publicly accountable organizations, and lenders or investors who demand the highest confidence.
The contractor who paid for the wrong report
Meet Darren, who runs Larkspur Landscaping Inc., a growing design-build landscaping company in Lethbridge, Alberta. To finance a fleet of equipment, his bank asks for "year-end financial statements." Darren calls his accountant and asks, in good faith, for "a Notice to Reader" — the term he's always used.
Two things are off. First, the NTR no longer exists; what he'd actually get is a Compilation Engagement Report under CSRS 4200. Second — and more costly — the bank's loan terms, in the fine print, require a Review engagement. A compilation carries no assurance, and the lender won't accept it for the size of facility Darren wants.
Because nobody checked the bank's requirement first, Darren orders and pays for a compilation, submits it, and gets bounced. Now he has to commission a review instead — more procedures, more time, more fee — and the financing is delayed by weeks at exactly the wrong moment in his season.
The cheapest engagement isn't a bargain if it's the wrong one. The right question isn't "what does it cost?" — it's "what level does the reader require?"
Had Darren simply asked the bank which engagement they needed before ordering, he'd have commissioned the review once, used the correct current terminology, and closed his financing on time. The three levels aren't interchangeable, and the reader — not the business — sets the bar.
What should have happened
- Ask the lender/reader which engagement they require — compilation, review, or audit — in writing, before ordering.
- Use current terminology: it's a Compilation Engagement Report, not a "Notice to Reader."
- Match the cost and timeline to the level actually needed — don't under- or over-buy.
- Build in lead time: a review or audit takes longer than a compilation.
A quick decision guide
- Who's the reader (bank, investor, landlord, regulator), and what level have they specified?
- Do you only need statements for internal use or your tax filing? A compilation may be enough.
- Does a lender want outside comfort short of an audit? That's a review.
- Are you required to be audited (size, regulation, shareholder agreement, major financing)? Then it's an audit.
- Are you still saying "Notice to Reader"? Update to Compilation Engagement Report.
Knowing which engagement you actually need — and not paying for the wrong rung — starts with clean, reliable books underneath it. That's what every CDL plan is built to deliver, and you can estimate the cost in about a minute.
"Financial statements" is three different things
Compilation, review, and audit aren't grades of the same report — they're separate engagements with separate standards and separate price tags, distinguished by how much the CPA independently stands behind the numbers. The reader of the statements decides which one you need, so ask them first. And retire "Notice to Reader" — the current compilation deliverable is the Compilation Engagement Report, with real disclosures behind it.
Not sure which engagement your lender needs?
Ordering the wrong level means paying twice and losing weeks. A 20-minute call is enough to match the engagement to what's actually required — and to make sure your books are ready for it.
Book a Free 20-Minute CallThis article is for informational purposes only and does not constitute professional advice. Assurance and related-services standards (CSRS 4200, CSRE 2400, and the CAS) contain detail and requirements that change over time. Consult a qualified CPA to determine the right engagement for your situation.
Authoritative sources. The standards themselves live in the CPA Canada Handbook; the pages below open on the CPA Canada website.
- CPA Canada — CSRS 4200, Compilation Engagements (guidance resources)
- CPA Canada — The New Compilation Engagements Standard (the Notice to Reader replacement, effective for periods ending on or after Dec 14, 2021)
- Review engagements: CSRE 2400; audits: the Canadian Auditing Standards (CAS) — both in the CPA Canada Handbook — Assurance.
- Related reading: What Belongs in Retained Earnings, A Deposit Is Not Revenue, and Books vs. Tax Depreciation.