Tax Audit Under Section 44AB: Who Needs One

Section 44AB of the Income-tax Act, 1961 requires certain businesses and professionals to have their accounts examined by a chartered accountant and a tax audit report filed, separately from any audit the Companies Act may already require. It is a different audit, with a different trigger, a different due date and its own penalty for missing it.

This guide covers who crosses the line into a tax audit, how the cash-transaction condition changes the turnover limit, how presumptive taxation under sections 44AD and 44ADA interacts with the requirement, the forms involved, the due date and penalty, and the clause-level issues that most often come up once the audit starts.

Who needs a tax audit

A person carrying on business needs a tax audit once total sales, turnover or gross receipts for the year exceed Rs 1 crore. A person carrying on a profession - the law lists categories such as legal, medical, engineering, architecture, accountancy, technical consultancy and similar specified professions - needs one once gross receipts exceed Rs 50 lakh.

These are the baseline thresholds. Two things can change the picture from here: the mix of cash in the business, covered next, and whether the person is using a presumptive taxation scheme instead of maintaining regular books.

The cash-transaction condition that lifts the limit to Rs 10 crore

For a business, the turnover threshold rises from Rs 1 crore to Rs 10 crore if the business keeps its cash dealings small: total cash receipts during the year must not exceed 5 percent of total receipts, and total cash payments must not exceed 5 percent of total payments. Payments and receipts by account payee cheque, account payee bank draft, or any electronic mode through a bank account, such as UPI, NEFT, RTGS, IMPS, net banking, or a debit or credit card, count as non-cash for this test. A cheque or bank draft that is not account payee is treated as cash.

This is the test that lets many digitally-run businesses with turnover well above Rs 1 crore stay outside tax audit entirely. It is also the test that catches businesses out when a few large cash transactions push the cash share over 5 percent partway through the year without anyone noticing until the books are closed.

Presumptive taxation and when it still triggers an audit

Section 44AD lets an eligible business with turnover up to Rs 2 crore (or Rs 3 crore if total cash receipts do not exceed 5 percent of total receipts) declare profit at a prescribed rate - 8 percent of turnover generally, 6 percent on receipts through banking channels - without maintaining regular books or a tax audit. Section 44ADA offers a similar route for specified professionals with gross receipts up to Rs 50 lakh (or Rs 75 lakh if total cash receipts do not exceed 5 percent of total receipts), at a prescribed rate of 50 percent of receipts.

A tax audit still applies within these schemes in two situations: when the person declares profit below the prescribed rate and total income exceeds the basic exemption limit, or when a person who used section 44AD opts out of it and, within the five-year lock-out that follows, has total income above the exemption limit. The presumptive schemes are an alternative to maintaining books and getting audited, not an automatic exemption in every case.

Forms 3CA, 3CB and 3CD

The audit report itself takes one of two forms depending on whether the entity's accounts are already audited under another law. Form 3CA is used when the accounts are audited under a law such as the Companies Act - for example, a private limited company that is also liable for tax audit files 3CA alongside its statutory audit report. Form 3CB is used when there is no such other audit, which covers most proprietorships, partnerships and LLPs that cross the threshold.

Both forms attach Form 3CD, a detailed statement of particulars running to roughly four dozen clauses covering accounting methods, statutory dues, related-party and cash transactions, depreciation, inventory and loan or deposit details. Most of the real audit work goes into getting Form 3CD right.

Due date and penalty

The tax audit report is generally due by 30 September of the assessment year, and by 31 October where the assessee also has an international or specified domestic transaction requiring a transfer pricing report in Form 3CEB. These section number references follow the Income-tax Act, 1961; the Income-tax Act, 2025 applies from 1 April 2026 and renumbers the provisions, so check the current section references before relying on them.

Section 271B sets the penalty for not getting accounts audited or not furnishing the report in time: 0.5 percent of total sales, turnover or gross receipts, or Rs 1,50,000, whichever is lower. Section 273B spares the penalty where the person shows reasonable cause for the failure, which is decided case by case rather than assumed.

Common clause-level problems

A handful of issues account for most of the back-and-forth once a tax audit begins, and most of them are avoidable with a mid-year review rather than a year-end scramble.

• Section 43B disallowances where statutory dues such as GST, provident fund or bonus are paid after the year end
• Section 40A(3) disallowance for cash payments above the prescribed limit to a single person in a single day
• Sections 269SS and 269T limits on cash loans, deposits and repayments above Rs 20,000
• TDS not deducted or short-deducted, disallowable under section 40(a)(ia)
• GST turnover not reconciling to the books or to the income-tax return
• Inventory valuation and depreciation computed differently for the Companies Act and the Income-tax Act without a clear reconciliation

Frequently asked questions

What counts as turnover for the Rs 1 crore limit?

Broadly, gross sales or turnover from the business for the year, before most deductions. Items such as sales returns and trade discounts are generally excluded, but borderline items should be checked against the current guidance rather than assumed.

Can a business with turnover below Rs 1 crore still need a tax audit?

Yes. A business using the presumptive scheme under section 44AD that declares profit below the prescribed rate, with total income above the exemption limit, needs a tax audit regardless of the Rs 1 crore figure, and the same can apply during the five-year lock-out after opting out of the scheme.

What happens if the tax audit report is filed late?

Section 271B penalty applies - 0.5 percent of turnover or receipts, or Rs 1,50,000, whichever is lower - unless reasonable cause is shown under section 273B. A late or missing report also tends to surface during loan applications and tax scrutiny.

Is a tax audit the same as a statutory audit?

No. A statutory audit under the Companies Act applies to every company regardless of turnover. A tax audit under section 44AB applies once turnover or receipts cross the limits in this guide, to companies, firms, proprietorships and professionals alike. Our guide on statutory audit of a private limited company covers the Companies Act side.

Related guides

• Statutory audit of a private limited company
• Startup compliance calendar for India
• Audit and assurance services