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Chapter IX - Accounts of Companies

Section 138

Section 138: internal audit

Companies in the classes prescribed by rules must appoint an internal auditor to audit the company’s functions and activities. The internal auditor may be a chartered accountant, a cost accountant or another professional chosen by the Board.

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This article is for general information. Refer to the Companies Act, 2013 official text for the official provisions. If you need professional advice for your situation, contact Bizeneed.

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Statutory text

Bare law

(1) Such class or classes of companies as may be prescribed shall be required to appoint an internal auditor, who shall either be a chartered accountant or a cost accountant, or such other professional as may be decided by the Board to conduct internal audit of the functions and activities of the company. (2) The Central Government may, by rules, prescribe the manner and the intervals in which the internal audit shall be conducted and reported to the Board.

Introduction

Section 138 leaves the companies that need an internal auditor, and the manner and intervals of internal audit, to rules made by the Central Government. Check the current rules for your company’s class before deciding whether an internal auditor is required.

Key takeaways

1

Prescribed classes

Only companies in classes prescribed by rules must appoint an internal auditor.

2

Who can be appointed

A chartered accountant, a cost accountant, or another professional decided by the Board.

3

Manner and intervals

The Central Government may prescribe by rules how and how often the internal audit is conducted and reported to the Board.

Who must appoint an internal auditor

Sub-section (1) applies to the class or classes of companies prescribed by rules. A company should compare its status and financial parameters with the current prescribed criteria each year.

Qualification and scope

The internal auditor may be a chartered accountant, a cost accountant, or another professional decided by the Board. The internal audit covers the functions and activities of the company. The statutory auditor cannot provide internal audit services to the company, its holding company or its subsidiary company, because section 144(b) prohibits it.

Conduct and reporting

Sub-section (2) allows the Central Government to prescribe by rules the manner and intervals of internal audit and how it is reported to the Board. Record the Board’s decisions on scope, frequency and methodology, along with the internal audit reports.

Practical preparation

Check applicability against the current rules. Pass a Board resolution appointing the internal auditor. Confirm the appointee is not the statutory auditor. Agree scope and frequency. Table the internal audit reports at the Board.

Practical checklist

Do

  • Re-check applicability each year against the current rules.
  • Record the scope and periodicity of internal audit in Board minutes.

Avoid

  • Do not appoint the statutory auditor as internal auditor.
  • Do not assume the requirement applies or does not apply without checking the rules.

Illustrative example

Hypothetical: company crossing a threshold

A growing company finds that it now falls within a prescribed class.

  1. Confirm

    Check the current rules for its class.

  2. Appoint

    The Board appoints a qualified internal auditor who is not the statutory auditor.

  3. Report

    Internal audit reports go to the Board at the agreed intervals.

Outcome

  • The company meets section 138 and avoids a conflict with section 144.

Glossary

Internal auditor
The person appointed under section 138 to conduct internal audit of the company’s functions and activities.
Prescribed
Specified by rules made under the Act.

Frequently asked questions

Must every company appoint an internal auditor?

No. Only companies in the classes prescribed by rules.

Can a non-accountant be internal auditor?

Yes. Section 138 allows another professional decided by the Board, besides a chartered accountant or a cost accountant.

Need help applying this provision to your situation?

Contact Bizeneed

Last updated 11 October 2026