Tax Audit Under Section 44AB: Limits, Forms, Due Date and Penalty

A tax audit under Section 44AB of the Income-tax Act, 1961 is a check of your books of account by a Chartered Accountant. You need one if your business turnover crosses Rs 1 crore in the year, or Rs 10 crore when almost all your money moves through the bank, or if your professional gross receipts cross Rs 50 lakh. The CA files the report in Form 3CA or 3CB along with Form 3CD, normally by 30 September of the assessment year.

Use this table to see, at a glance, whether the audit rule touches you. Figures are for a single financial year.

Work through these questions in order. The first “yes” is your answer.

1. Are you a professional? If your gross receipts from your profession are more than Rs 50 lakh in the year, you need a tax audit. Stop here.
2. Are you in business with heavy cash use? If your turnover is more than Rs 1 crore, you need an audit. “Turnover” means total sales, turnover or gross receipts.
3. Are you a mostly digital business? The Rs 1 crore limit rises to Rs 10 crore, but only if both tests are met: your cash receipts are 5% or less of all receipts, and your cash payments are 5% or less of all payments. If even one test fails, the Rs 1 crore limit applies again.
4. Did you opt for the presumptive scheme and then show a lower profit? Under Section 44AD, for business, or Section 44ADA, for professions, you declare income at a fixed rate. If you declare less than that rate and your total income is above the basic exemption limit, an audit becomes compulsory whatever your turnover is.

If none of the above fits you, you generally do not need a tax audit for that year. When in doubt, ask a practising Chartered Accountant, because only a CA holding a valid certificate of practice can sign the report.

The Chartered Accountant reports the audit in one of two forms, always paired with Form 3CD, which is the detailed statement of particulars about your accounts.

Due date. The law sets a “specified date” for the report, which is one month before the due date for filing your income-tax return under Section 139(1). For audit cases this normally works out to 30 September of the assessment year for the report, with the return itself due by 31 October. These are the standard dates, but the CBDT sometimes extends them, so always confirm the current year's dates before you file. For how the return deadlines fit together, see our guide on belated and revised income-tax returns.

If you were required to get a tax audit but did not, or you filed the report late, Section 271B allows a penalty. The amount is the lower of these two:

1. 0.5% of your total sales, turnover or gross receipts, or
2. Rs 1,50,000.

The word used in the law is “may”, so the Assessing Officer has discretion and does not have to impose it in every case. Section 273B gives you a defence: if you can show a genuine reasonable cause for the failure, such as a serious illness, a natural calamity, theft or seizure of records, or the auditor's sudden exit, the penalty need not be levied. Keep evidence of any such reason.

A missed audit often travels with other trouble, like a notice asking why your return looks off. If you receive one, read our income-tax notice guide first. If a penalty is wrongly imposed, you can challenge it in appeal, as explained in our note on filing an appeal before the CIT Appeals. And if you simply missed filing on time, you may still be able to fix it through an updated return under Section 139(8A).

No. A tax audit under Section 44AB is only about income-tax compliance and is reported in Form 3CA or 3CB with Form 3CD. A company's statutory audit under the Companies Act and any audit under GST law are separate exercises with their own rules and forms.

Only a Chartered Accountant who holds a valid certificate of practice can conduct and sign a tax audit report. A tax preparer, advocate or accountant without CA membership cannot sign the report for Section 44AB purposes.

Yes, in one common situation. If you had opted for the presumptive scheme under Section 44AD or 44ADA and then declare a profit lower than the deemed rate, and your total income is above the basic exemption limit, a tax audit becomes compulsory even though your turnover is small.

Late filing counts as a failure under Section 44AB and can attract the Section 271B penalty of 0.5% of turnover, capped at Rs 1,50,000. But if you have a genuine reasonable cause under Section 273B, you can ask the officer to drop the penalty. File as early as you can to avoid the argument altogether.

Not always. The presumptive schemes under Sections 44AD and 44ADA let you skip detailed books when you declare income at the set rate. The moment you declare less than that rate, while your total income is above the exemption limit, the audit requirement comes back.

1. Check your turnover or gross receipts for the financial year against the limits above.
2. If you are close to a limit, speak to a Chartered Accountant well before September, not at the last minute.
3. Keep your books, bank statements and digital-payment records ready so the CA can complete Form 3CD without delay.
4. Confirm the current year's report and return due dates on the income-tax portal, since the CBDT can extend them.

For a plain-language walk-through of how citizens use the law to hold offices accountable, read The RTI Playbook.