A quarterly audit review is a limited engagement in which an independent accountant checks a public company’s interim financial statements before those statements go into a Form 10-Q filing with the Securities and Exchange Commission. It is not a full audit. The auditor works mainly through inquiries of management and analytical comparisons of financial data, and the resulting report delivers what accountants call negative assurance: a statement that nothing came to the auditor’s attention suggesting the statements need material changes to conform with Generally Accepted Accounting Principles. PCAOB Auditing Standard 4105 sets the rules for these engagements.
How It Differs From an Annual Audit
The two engagements produce different levels of confidence, and the gap is deliberate. An annual audit involves extensive testing of individual transactions, third-party confirmation of balances, physical inventory observation, and detailed evaluation of internal controls. It ends with a formal opinion that the financial statements are presented fairly in all material respects. This is positive assurance: the auditor is affirmatively vouching for the numbers.
A quarterly review is narrower by design. Procedures consist principally of analytical work and inquiries, not transaction-level testing. The report explicitly warns readers that the review is substantially less in scope than a full audit and that no opinion on the financial statements is being expressed. AS 4105 exists to balance two competing needs: investors want timely financial updates between annual reports, and companies need a process fast enough to meet tight filing deadlines without the cost of a full audit every 90 days.
The Filing Deadlines That Drive the Timeline
Every public company files a Form 10-Q for each of the first three quarters of its fiscal year. There is no 10-Q for the fourth quarter, because the annual Form 10-K covers that period. The CEO and CFO must personally certify the financial and other information in each filing.
How quickly the 10-Q must be filed depends on the company’s public float:
- Large accelerated filers (public float of $700 million or more): 40 days after the quarter ends.
- Accelerated filers (public float of $75 million to under $700 million): 40 days after the quarter ends.
- Non-accelerated filers (public float below $75 million): 45 days after the quarter ends.
A company that cannot file on time must submit a Form NT (formally Form 12b-25) explaining the delay. That filing buys only five additional calendar days for a 10-Q. Because of that thin cushion, the quarterly review needs to be substantially complete before the original deadline arrives, not started against it.
What Management Prepares Before the Review
The speed of a quarterly review depends heavily on how well the company organizes its records before the auditor arrives. Poor preparation is the single most common reason reviews slip past deadlines, and it is preventable.
SEC rules allow interim statements to be condensed rather than presented in the full detail required annually. Balance sheets can show major captions only, income statements can combine smaller line items, and footnote disclosures that would duplicate the most recent annual report can be omitted. The underlying records supporting those condensed numbers, however, must still be complete and reconciled.
The core documentation includes:
- Condensed financial statements covering the quarter and year-to-date period, along with a comparative prior-year period.
- Account reconciliations, including bank reconciliations, sub-ledger to general-ledger tie-outs, and intercompany balances, all completed and approved by management before the review starts.
- Supporting schedules for material accounts such as receivables, inventory (broken out by raw materials, work in process, and finished goods as required by Regulation S-X), and fixed assets.
- Documentation for significant transactions during the quarter, particularly contracts, debt agreements, and any unusual items recognized near the period’s end.
Companies with outstanding loans should also confirm compliance with any financial covenants that require delivery of quarterly financials to lenders. Many commercial loan agreements independently require unaudited quarterly statements and compliance certificates within 45 to 60 days of the quarter’s end, so a delayed review can trigger problems with creditors even before the SEC deadline becomes an issue.
Inquiry Procedures
The first major component of the review is structured questioning of the people who prepare and oversee the financial statements. AS 4105 lists specific topics the auditor must cover, and the answers often shape the rest of the engagement.
The auditor asks management, typically the CFO and controller, whether the interim statements were prepared in conformity with GAAP, whether they are aware of any uncorrected misstatements, and whether there have been changes in accounting policies during the quarter. Questioning extends to unusual or complex situations that could affect the numbers, significant transactions occurring in the last several days of the period, and any known or suspected fraud. The auditor also asks about communications from regulators regarding reporting deficiencies and about side agreements or unrecorded transactions.
Beyond finance, the auditor reads available board and committee meeting minutes and inquires about matters discussed at meetings whose minutes have not yet been prepared. If significant subsidiaries have their own auditors performing separate interim reviews, the lead auditor obtains those reports or follows up on their status. A surprising answer in any of these areas can prompt the auditor to expand procedures, which is one way a routine review can start resembling a targeted audit.
Analytical Procedures
The second component involves studying the financial data for unusual patterns. The auditor compares the current quarter’s numbers against at least three benchmarks: the same quarter of the prior year, the immediately preceding quarter, and the company’s own budgets or forecasts. Revenue gets a particularly close look, often broken down by month, product line, or operating segment to spot anomalies that aggregate figures might hide.
The auditor also calculates key ratios and compares them against historical trends. If gross margin has consistently run at 38 percent and suddenly drops to 31 percent, the gap demands an explanation. The auditor develops expectations before looking at the actual numbers, using an understanding of the business and its industry, so that the comparison has teeth. A deviation that management cannot explain with credible evidence creates a problem the auditor cannot ignore.
When an analytical procedure surfaces a material fluctuation and management’s explanation is unconvincing or unsupported, the auditor may perform limited substantive testing on that specific item. That might mean examining a sample of invoices, reviewing bank confirmations, or inspecting contract terms. The testing is targeted rather than comprehensive, but it can slow the review if multiple areas show unexplained movement.
The Management Representation Letter
Before the review can be completed, the auditor must obtain a written representation letter from management. This is not optional. AS 4105 requires specific representations for every interim period under review, and the auditor cannot issue a review report without them.
The letter covers:
- Fair presentation of the financial statements and their conformity with GAAP for interim reporting, along with management’s acknowledgment of responsibility.
- Disclosure of all significant deficiencies and material weaknesses in internal controls, and acknowledgment of responsibility for programs designed to prevent and detect fraud.
- Knowledge of any actual or suspected fraud involving management, employees with significant control roles, or others where the fraud could materially affect the statements.
- Confirmation that all financial records have been made available, all related-party transactions have been disclosed, and there are no unrecorded transactions or undisclosed side agreements.
- A statement that any uncorrected misstatements identified during the review are immaterial, individually and in the aggregate, with a summary of those items attached.
If management refuses to provide required representations, the auditor faces a scope limitation that can prevent the review from being completed at all.
Communication With the Audit Committee
Not every finding goes straight to the board. The auditor’s first step is communicating issues to the appropriate level of management as soon as practicable. If the auditor believes a material modification to the statements is needed, or that internal control disclosures need correction for the CEO and CFO certifications to be accurate, management gets the first chance to respond.
If management does not respond appropriately within a reasonable time, the auditor escalates to the audit committee before the 10-Q is filed. Certain matters must reach the audit committee regardless of management’s response: significant deficiencies or material weaknesses in internal controls, any fraud or suspected fraud, changes in critical accounting estimates, changes in significant accounting policies, and uncorrected misstatements the auditor has aggregated. All of these communications must occur before the 10-Q is filed with the SEC. Once the filing goes out, remediation options become far more disruptive, potentially requiring an amended filing.
The Review Report
The formal deliverable is the review report, which accompanies the financial statements in the 10-Q. The standard report identifies the interim information reviewed, states that the review was conducted under PCAOB standards, describes the review as consisting principally of analytical procedures and inquiries, and concludes with the negative assurance statement that the auditor is not aware of any material modifications needed for GAAP conformity.
The report also contains a scope paragraph warning readers that a review is substantially less in scope than a full PCAOB audit and that no audit opinion is being expressed. That language exists so investors do not read more assurance into the report than it provides. A clean review report means nothing alarming surfaced during a limited examination. It does not mean the statements are free of all errors.
When the Report Gets Modified
A clean report is the expected outcome, not a guaranteed one. AS 4105 identifies three situations where the auditor modifies the review report:
- Departure from GAAP. If the interim statements are materially affected by a GAAP departure, the auditor describes it and, if practicable, quantifies the effect. For example, if a company failed to capitalize lease obligations that should appear on the balance sheet, the modified report would estimate the impact on assets, liabilities, and net income.
- Inadequate disclosure. If information the auditor believes is necessary for adequate disclosure has been omitted, the auditor modifies the report and, where practicable, includes the missing information directly in the report.
- Scope limitation. If the auditor is unable to perform procedures considered necessary, the review cannot be completed as designed. Depending on severity, the auditor may need to withdraw from the engagement.
A modified review report is a serious event. It can delay the 10-Q filing, draw scrutiny from the SEC staff, and unsettle investors. Most companies work hard to resolve issues before they reach the report stage.
What a Late or Missed Filing Costs
Companies sometimes treat quarterly deadlines as soft targets. They are not. The consequences cascade quickly and hit multiple parts of the business at once.
The SEC can bring enforcement actions against companies that fail to file timely reports, resulting in cease-and-desist orders and civil penalties. In a 2021 enforcement sweep, the SEC charged companies that filed deficient Form NT notifications, with penalties ranging from $25,000 for a single deficient filing to $50,000 for multiple violations.
Stock exchanges impose their own consequences independently. The NYSE attaches an “.LF” indicator to a late filer’s ticker symbol and publishes the company on a late filer list. The company must issue a press release disclosing its delinquent status within five days of receiving the NYSE’s notice, and if it does not, the NYSE issues one itself. The NYSE monitors the company for six months after the missed deadline, with the possibility of an additional six-month extension at the exchange’s discretion.
Nasdaq’s process runs on similar lines. A company that fails to file a periodic report receives a deficiency notice and has 60 days to submit a compliance plan. The maximum time Nasdaq staff can grant is 180 days from the original due date. If the company requests a hearing, the panel can extend that window to 360 days total, but that is the outer limit before delisting proceeds.
Beyond exchange rules, a late filing can strip a company of eligibility to use Form S-3 for shelf registrations, the efficient method most public companies use to raise capital. Losing S-3 eligibility changes the cost and complexity of accessing the capital markets. For companies with outstanding credit facilities, a late SEC filing may also constitute a default under loan covenants, potentially triggering acceleration of the debt. The review itself takes a fraction of the time and cost of a full audit, but a botched timeline can set off a chain of problems that no amount of auditing can fix after the fact.