What is the difference between internal and statutory audit?

Short answerA statutory audit is a legally-required, independent audit of the financial statements for shareholders and regulators — done by an external CA, once a year. An internal audit is a management tool that reviews processes, controls and risks throughout the year, to improve operations. One reports on the accounts; the other strengthens the business.

Purpose and audience

A statutory audit is mandated by law and exists to give shareholders, lenders and regulators independent assurance that the financial statements are true and fair. An internal audit serves management — it examines whether processes and controls are working and where risks or inefficiencies lie.

Who, when and scope

The statutory audit is done by an external, independent CA, once a year, focused on the accounts. The internal audit is ongoing (monthly/quarterly), can be done by in-house staff or an outsourced firm, and ranges across operations — procurement, inventory, payroll, compliance. For some companies internal audit is itself mandatory — confirm.

How they work together — an example

Example: a company’s internal audit finds through the year that purchase approvals are being bypassed and fixes the control; the statutory auditor then relies partly on that strengthened control when forming an opinion on the year-end accounts. Good internal audit makes the statutory audit smoother and the numbers more reliable. Our team can provide internal audit and statutory audit (where independence permits).

Talk to CA Vijay R Singh

Unsure whether you need internal or statutory audit? You can message him directly, or book a short call to talk through your situation.

This answer is general information for businesses, not professional advice. Tax rates, thresholds and forms change with each Finance Act — please confirm the current position for your own facts, or speak to us, before acting.

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