Audit vs. Review vs. Compilation: What Buyers Actually Require

The three levels of financial statement assurance

For adjacent context, compare this with How to Prepare a Business for Sale: Why <a href="/insights/transaction-readiness-checklist-founder-owned" class="subtle-link">Transaction Readiness</a> Starts Before the Process; the strongest operators connect these topics instead of treating them as separate workstreams.

Financial statements can be prepared with three levels of CPA involvement, each providing a different level of assurance to the reader. Understanding the difference is essential for M&A preparation because buyers use the assurance level as a proxy for financial statement reliability. Financial statement quality sits alongside the monthly management reporting package as one of the two most scrutinized documentation sets in any institutional diligence process.

Assuming reviewed or compiled statements are adequate is reasonable from an operational standpoint, the numbers have passed through a CPA's hands and the business has operated on that basis for years. The buyer's standpoint is different: institutional lenders will not underwrite acquisition financing without audited statements, regardless of how clean the reviewed financials look.

What different buyer types require

Buyer financial statement requirements are not universal. They vary by buyer type, deal size, and financing structure. Understanding what your likely buyers require before you upgrade saves significant time and cost.

The relationship between audit and sell-side QoE

Founders frequently confuse an audit with a <a href="/insights/quality-of-earnings-report-founder-guide" class="subtle-link">quality of earnings report</a>. They serve different purposes and neither replaces the other. An audit provides assurance that the financial statements are presented fairly under GAAP. A QoE analyzes the EBITDA adjustments, revenue quality, working capital normalization, and operating metrics that are not addressed in an audit.

Cost of upgrading and timing

Upgrading from reviewed to audited financials is not simply additive. The first-year audit is the most expensive because the auditor must establish opening balances, test prior periods, and build familiarity with the business. Subsequent-year audits at the same firm are typically 30 to 50% less expensive than the first year.

The optimal timing: engage an audit firm 24 months before your target process launch. This gives you two completed audited fiscal years before the process starts, which is what most PE buyers require, and avoids the compressed-timeline premium that audit firms charge for rushed engagements.

Selecting an audit firm for M&A readiness

Not all audit firms are created equal for M&A purposes. A small local CPA firm that handles your tax returns may not have the M&A credibility to satisfy an institutional buyer's diligence team. Buyers pay attention to who audited the statements.

For businesses targeting PE buyers at $10M+ EBITDA, the audit firm should have: experience with middle market M&A transactions, familiarity with the GAAP treatments relevant to your industry, and a reputation the buyer's diligence team will recognize. Regional firms with M&A practices can work well; small local firms with no M&A experience create friction.

Audit vs. review vs. compilation: the decision framework

The decision about which level of financial statement assurance to obtain is not primarily an accounting decision, and it is a transaction preparation decision. The right answer depends on your target buyer type, your anticipated deal size, and your lender requirements. Starting with what your likely buyers require and working backward to the right assurance level saves time and avoids over-investing in an audit when a review would suffice, or under-investing in a review when an audit is required.

The lender requirement is often the binding constraint. Even buyers who are willing to proceed with reviewed financials through early diligence must ultimately obtain acquisition financing, and most institutional lenders require audited statements before they underwrite a deal regardless of buyer preference. Budget for the audit as a cost of the transaction, not as an optional upgrade. On a $20M+ deal, the first-year audit cost is less than 0.5% of enterprise value, one of the highest-return preparation investments available.

Common audit adjustments that affect valuation

The most consequential outcome of a first-year audit is not the audit opinion, and it is the audit adjustments. When an audit finds items that require restatement or adjustment, those adjustments flow directly to EBITDA and therefore to the purchase price calculation. Understanding the most common adjustment categories helps founders prioritize which accounting areas to clean up before engaging an auditor.

The valuation implication of each adjustment type: revenue recognition and deferred revenue adjustments are the most impactful because they directly reduce EBITDA in the trailing twelve months that buyers use to calculate purchase price. Inventory and receivable adjustments are one-time charges that may be addable back as non-recurring items, but only if the underlying issue has been genuinely resolved and will not recur.

How to prepare for an audit efficiently: cutting 2–4 weeks off the timeline

First-year audits are slow primarily because the audit team arrives without the documentation they need and spends the first 2–3 weeks requesting materials the client then scrambles to produce. A well-prepared PBC (Provided By Client) list response can cut 2–4 weeks off the audit timeline and reduce the audit fee by $8K–$20K.

The PBC list is the auditor's initial request for documents and schedules. Standard first-year PBC items include: three years of financial statements in trial balance format; the general ledger for all periods under audit; bank reconciliations for all accounts and periods; accounts receivable and accounts payable aging schedules; fixed asset schedules with depreciation; debt and lease documentation; related-party transaction documentation; corporate governance documents (operating agreement, board minutes, equity records); and the prior-year tax returns.

Document retention requirements for audit: the auditor will request supporting documentation for transactions above a certain threshold (typically $10K–$25K depending on business size). Invoices, contracts, bank statements, and customer agreements need to be available for all periods under audit. For businesses that have not maintained organized records, a document retention catch-up project 90–120 days before the audit engagement is worth the investment, the alternative is paying auditors to wait while you find records.