By GreenGrowth CPAs Audit & Assurance Team · Updated October 2026 · Audit & Assurance
AS 1215 is the PCAOB standard that tells auditors of public companies and broker-dealers what audit documentation must contain, when to lock the file, and how long to keep it. Its core tests are simple to state: an experienced auditor with no connection to the engagement must be able to follow the work, the auditor must archive the final file within 14 days of the report release date and keep it for seven years.
That 14-day window is new. The PCAOB shortened it from 45 days as part of its 2024 AS 1000 amendments, and it now reaches firms of every size. Here is what the standard requires and what it means for audited companies.
QUICK ANSWER
AS 1215 is the PCAOB auditing standard on audit documentation. It requires workpapers detailed enough for an experienced auditor with no prior connection to the engagement to understand the procedures, evidence, conclusions, and who did and reviewed the work. Auditors must archive a complete file within 14 days after the report release date (previously 45) and keep it for seven years.
AS 1215: At a Glance
- What it covers: Documentation for PCAOB engagements, including financial statement audits, internal control audits, and interim reviews.
- Core test: An experienced auditor with no prior connection to the engagement must be able to understand the work and who reviewed it.
- Completion deadline: A final file archived no more than 14 days after the report release date.
- Retention: Seven years from the report release date, unless law requires longer.
- After archiving: Auditors may add to the file but never delete. Additions must show the date, the preparer, and the reason.
- Linked standards: Engagement quality review under AS 1220 and critical audit matters under AS 3101 both rely on AS 1215 documentation.
What Is AS 1215 and Why Does It Exist?
The PCAOB adopted the standard in 2004 as Auditing Standard No. 3, and it now carries the number AS 1215. It defines audit documentation as the written record of the basis for the auditor's conclusions. People also call it work papers or working papers.
Documentation does three jobs. It shows the engagement complied with PCAOB standards. Next, it supports the auditor's conclusion on every relevant financial statement assertion. Finally, it shows that the accounting records agree or reconcile with the financial statements.
Reviewers rely on it too. Engagement partners, quality reviewers, and PCAOB inspectors all read the file to judge the quality of the work. Inspectors judge the work largely by what the file shows. Our overview of PCAOB audit requirements puts AS 1215 in the context of the wider rulebook.
What Audit Documentation Must Show
The Experienced Auditor Standard
Paragraph .06A sets the bar. Documentation must let an experienced auditor, having no previous connection with the engagement, understand the nature, timing, extent, and results of the procedures, the evidence obtained, and the conclusions reached. That same reader must be able to tell who performed the work, when it was completed, who reviewed it, and when.
The 2024 amendments sharpened paragraph .06 so that the file clearly shows who reviewed the work and when, including work by specialists used as evidence.
How Much Detail Is Enough
The standard asks auditors to weigh the nature of the procedure, the risk of material misstatement, and the judgment involved. Accounting estimates call for more extensive documentation because they demand more judgment. When auditors test system reports, the file must also show how they tested that data, a topic we cover in our guide to IPE and sampling in auditing.
Significant Findings and the Completion Document
Auditors must document significant findings or issues, the actions taken to address them, and the basis for their conclusions. Examples include complex accounting judgments, audit adjustments, disagreements within the team, and matters that could modify the report. All of these must appear in an engagement completion document, either in full or by cross-reference.
The Documentation Completion Date: 45 Days Becomes 14
Before the report release date, the auditor must finish all necessary procedures and obtain sufficient evidence. Under the amended paragraph .15, the engagement partner and other supervisors must also complete their reviews by then. The firm then has no more than 14 days after the report release date to assemble a complete and final set of documentation for retention. AS 1215 calls that deadline the documentation completion date.
Two variations apply. If no report issues, the 14 days run from substantial completion of fieldwork. If the auditor could not complete the engagement, they run from when the engagement ceased.
When the 14-Day Rule Applies
The SEC approved the change in August 2024 with a phased start. Firms that issued audit reports for more than 100 issuers during calendar 2024 apply it to audits of fiscal years beginning on or after December 15, 2024. All other registered firms apply it to fiscal years beginning on or after December 15, 2025.
In practice, as of 2026, a smaller firm auditing a calendar-year company first faces the 14-day clock on the fiscal 2026 audit, with reports issued in early 2027. The PCAOB said the change promotes contemporaneous documentation, gives inspectors earlier access, and narrows the window for improper alteration of files.
💬 The Conversation Worth Having
A shorter archiving window does not give your auditor more time after the report. It removes it. Every review now has to finish before the report release date. Ask your audit partner how the timeline changes this year, and when they need final schedules, legal letters, and representation letters.
Retention: Seven Years
Paragraph .14 requires auditors to keep documentation for seven years from the report release date, unless law requires a longer period. The report release date is the date the auditor grants permission to use the report. When no report issues, the seven years run from substantial completion of fieldwork, or from when the engagement ceased.
Federal law points the same way. Section 103 of the Sarbanes-Oxley Act directs the PCAOB to require registered firms to maintain audit work papers for at least seven years. SEC Rule 2-06 of Regulation S-X separately requires accountants to retain audit and review records for seven years after concluding the engagement.
Changes After the Documentation Completion Date
Once archiving is done, paragraph .16 locks the file. Auditors may not delete or discard anything before the retention period ends. They may add information, but each addition must state the date it was added, the name of the person who prepared it, and the reason for adding it.
Additions are common and legitimate. Subsequent procedures for a registration statement are one example. Form AP is another. It can be due up to 35 days after the report is first filed, so if actual audit hours arrive after archiving, the auditor adds them under these rules.
Facing a PCAOB audit on a tighter timeline? Let's map what your auditor needs and when.
Book a Review →How AS 1215 Connects to EQR and CAMs
Engagement Quality Review (AS 1220)
The engagement quality reviewer evaluates the team's significant judgments by reading its documentation. AS 1220 applies the same experienced auditor test to the review itself, and requires that the EQR documentation be included in the engagement documentation. The firm cannot release the report until the reviewer gives concurring approval of issuance. Our guide to mastering EQR covers the reviewer's role in depth.
Critical Audit Matters (AS 3101)
AS 3101 adds a specific documentation duty. For each matter communicated to the audit committee that relates to material accounts or disclosures, the auditor must document whether it is a critical audit matter and why. A footnote ties that record to the AS 1215 experienced auditor standard. The EQR must also evaluate how the team determined, communicated, and documented CAMs. See our guide to CAMs and KAMs for how those determinations work.
▶ AS 1215 Quick Reference
| Requirement | Paragraph | Rule |
|---|---|---|
| Content | .06, .06A | Experienced auditor can follow the work, preparer, and reviewer |
| Significant findings | .12, .13 | Documented and summarized in a completion document |
| Retention | .14 | Seven years from the report release date |
| Completion date | .15 | 14 days after report release (45 before the amendments) |
| Later changes | .16 | No deletions; additions dated, named, and explained |
What This Means for Companies Being Audited
AS 1215 binds the auditor, not the company. Still, its timing rules shape your close calendar. Final trial balances, support for estimates, and signed representation letters need to reach the audit team early enough for every review to finish before the report goes out.
Firms with strong quality control in auditing will plan for this. Public companies and pre-IPO teams can learn more about our public company audit services.
KEY TAKEAWAYS
- ›AS 1215 requires documentation that an experienced outside auditor could follow, including who did and reviewed each step.
- ›The documentation completion date is now 14 days after the report release date for all PCAOB firms, on a phased schedule.
- ›Auditors keep files for seven years, and every later addition needs a date, a preparer's name, and a reason.
- ›EQR under AS 1220 and CAM determinations under AS 3101 both depend on AS 1215 quality documentation.
Frequently Asked Questions
The basics
AS 1215, Audit Documentation, is the PCAOB auditing standard that sets requirements for the workpapers auditors prepare and retain on PCAOB engagements, such as audits of public companies and broker-dealers. It defines audit documentation as the written record of the basis for the auditor's conclusions. The standard covers what the file must contain, when to finalize it, how long to keep it, and how it may change after archiving.
Documentation must contain enough information for an experienced auditor with no previous connection to the engagement to understand the nature, timing, extent, and results of the procedures, the evidence obtained, and the conclusions reached. It must also show who performed the work and when it was completed, plus who reviewed it and the date of that review. The file must also record significant findings or issues and how the team resolved them, summarized in an engagement completion document.
Deadlines and retention
The documentation completion date is the deadline for assembling a complete and final set of audit documentation for retention. Following the PCAOB's 2024 amendments, it is no more than 14 days after the report release date, down from 45 days. Firms that audited more than 100 issuers in 2024 apply the 14-day rule for fiscal years beginning on or after December 15, 2024. All other firms apply it for fiscal years beginning on or after December 15, 2025.
Auditors must retain audit documentation for seven years from the report release date, unless law requires a longer period. The report release date is when the auditor grants permission to use its report. Without a report, the seven years run from substantial completion of fieldwork. For an unfinished engagement, they run from the date it ceased. This aligns with the seven-year work paper requirement in Section 103 of the Sarbanes-Oxley Act.
Changes and related standards
Auditors cannot delete or discard documentation after the documentation completion date, for the full retention period. They can add information when circumstances require it, such as procedures performed later for a registration statement or actual hours reported on Form AP. Each addition must record the date it was added, the name of the person who prepared it, and the reason for adding it. Undated or unexplained changes raise inspection concerns.
Both depend on it. Under AS 1220, the engagement quality reviewer evaluates the team's significant judgments through its documentation, and the reviewer's own work must meet the same experienced auditor test and be kept in the engagement file. Under AS 3101, auditors must document whether each qualifying matter communicated to the audit committee is a critical audit matter and why. That record must be detailed enough to satisfy AS 1215.
Where to Go From Here
Work With a PCAOB Registered Audit Team
Preparing for a public company audit, an IPO, or a tighter filing calendar? We help you plan the close so documentation and reviews finish on time.
KEY NUMBERS
A Tighter Archiving Window Starts With an Earlier Close.
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