Business owners often use "audit" as a single word for two quite different exercises. The distinction matters, because one is a legal obligation and the other is a management tool.

Statutory audit: an obligation to outsiders

A statutory audit is required by law. Its purpose is to give shareholders, lenders and regulators an independent opinion on whether the financial statements present a true and fair view. Every company registered in India requires one, regardless of turnover. The auditor is independent of management by design and reports to the shareholders.

Internal audit: a tool for insiders

An internal audit exists to serve management. It examines whether controls work, whether processes are followed and where the business is exposed. It is mandatory for companies above prescribed thresholds, but many smaller businesses commission one voluntarily because it pays for itself in recovered leakage and tightened processes.

Where they meet

A strong internal audit function makes the statutory audit smoother and cheaper, because the controls the statutory auditor tests are already documented and functioning. The two are complementary rather than duplicative.

What to ask yourself

If you are a registered company, the statutory audit is not a choice. The real question is whether your internal controls are strong enough that the statutory audit confirms what you already know, or weak enough that it tells you something you should have caught months ago.