🔍Peer Review Sample Selection – Simple Guide for CA Firms

One of the most common questions CA firms have before Peer Review is:

“Which audit files will be selected for review?”

Sample selection in Peer Review is systematic and logical, not random. Once the basic approach is understood, preparation becomes much easier.

How many files are usually selected?

The number of assurance engagements selected mainly depends on:

• Number of years the firm has been in practice
• Revenue from assurance services

In simple terms:

• Most firms will have 10 to 30 assurance files selected
• Larger firms may have more files selected
• New or very small firms may face 100% selection

If the total number of assurance clients is less than the prescribed minimum, the Reviewer is required to review all assurance engagements. In such cases, the Peer Review Certificate is generally issued with 18 months validity.

Files that are almost certain to be selected

While the exact combination may vary, a Peer Reviewer will almost always select:

• The highest revenue assurance client
• Audits of listed entities, PSUs, banks or insurance companies, if any
• At least one assurance engagement handled by each partner
• Files from each office or branch location
• Different types of assurance services (statutory audit, tax audit, GST, internal audit, certification, etc.)
• Any engagement where a regulatory advisory has been issued earlier

These selections help the Reviewer understand the firm’s assurance profile as a whole.

What the Reviewer is trying to ensure

The purpose of sample selection is representation, not fault-finding.

The Reviewer broadly ensures that:

• Different years under review are covered
• Different partners are represented
• Different client sizes and risk levels are included

This helps assess whether the firm follows consistent quality processes across its assurance engagements.

How CA firms can prepare in advance

Instead of worrying about which file will be selected, firms should focus on keeping all assurance files reasonably ready.

• Engagement letters are available and properly executed
• Independence and ethical declarations are documented
• Audit planning, execution and reporting are on record
• Working papers are properly filed and easily retrievable
• High-value and sensitive engagements are reviewed more carefully

When documentation is reasonably organised across engagements, the Peer Review process becomes smooth and predictable.

Final takeaway

Peer Review sample selection follows a clear and structured approach. Firms that understand this early can prepare calmly, avoid last-minute pressure, and improve the chances of a clean Peer Review report.

Peer Review should be viewed as a quality improvement exercise, not merely a compliance requirement.