Tax audit under section 44AB — the real threshold, and the five-year trap

Audit season starts quietly. There's no headline event, no filing window that opens on a fixed date the way GSTR-3B or the ITR utility does — just a growing pile of client files on a CA's desk from mid-August, each one needing a decision: does this business need a tax audit for FY 2025-26, or not. Get that decision wrong in either direction and it costs money — either an audit fee nobody needed to pay, or a penalty and a defective return nobody wanted.

The reason the decision goes wrong as often as it does is that owners remember a single number — "₹1 crore" — from a conversation years ago, and stop there. The actual rule under section 44AB of the Income-tax Act has moved twice since, and now turns on a second question nobody asks upfront: how much of the money moved as cash.

The threshold is two numbers, not one

For a business, the audit threshold is ₹1 crore in total turnover. But if cash receipts and cash payments during the year each stay within 5% of the total — meaning at least 95% of both money coming in and money going out moved through bank transfer, UPI, cheque, or card — the threshold rises to ₹10 crore. For a profession, the same logic applies at a lower scale: ₹50 lakh in gross receipts normally, rising to ₹75 lakh under the identical 5% cash condition.

Example: a Surat embroidery-job-work unit turning over ₹1.2 crore, paid almost entirely by RTGS and UPI from garment exporters, with only the odd cash payment to a daily-wage helper — well under 5% either way — needs no tax audit at all; it sits comfortably inside the ₹10 crore digital limit. A Ring Road kirana-supply trader with the same ₹1.2 crore turnover, but who collects a third of it in cash from small retailers, crosses ₹1 crore the moment the cash share exceeds 5%, and audit becomes mandatory even though the business is smaller in every practical sense.

Note that the 95% condition applies to both receipts and payments independently — a business with clean digital sales but a habit of paying labour and small suppliers in cash can lose the higher limit on the payments side alone, even if not a single rupee of turnover itself was cash.

The presumptive-scheme detour — and its price

Many small businesses and professionals never reach this calculation because they opt into presumptive taxation instead. Under section 44AD, a business with turnover up to ₹2 crore (₹3 crore under the same 5% cash test) can declare profit at a flat 6% of digital turnover or 8% of cash turnover, skip maintaining detailed books, and skip audit entirely. Under section 44ADA, professionals with receipts up to ₹50 lakh (₹75 lakh under the same test) can declare 50% of receipts as profit, with the same relief.

Example: a self-employed chartered engineer in Surat with ₹40 lakh in annual consulting fees, mostly by bank transfer, declares ₹20 lakh as profit under 44ADA, files ITR-4, and never opens a books-of-account question with the department.

The five-year lock-out trap

The relief comes with a condition that catches people who opted in during a good year and forget about it in a bad one. If you've used section 44AD in an earlier year and then, in a later year, declare profit below the 6%/8% presumptive rate — and your total income exceeds the basic exemption limit — you don't just lose presumptive treatment for that one year. Section 44AD(4) bars you from using the scheme again for the next five assessment years, and section 44AB(e) makes a tax audit mandatory for every one of those years, regardless of turnover, even if you're well under ₹1 crore.

Example: a small trading firm on Ring Road used 44AD for three years, declaring 8% profit each time. In year four, a slow season and a bad debt push actual margin down to 3% — still declared honestly, still audited books available, but below the presumptive rate. That single year now locks the firm out of 44AD, and into mandatory audit, through year eight — even if turnover drops well below ₹1 crore in the meantime.

The audit threshold is not a size test. It's a paperwork test — how you were paid, and how you answered last year — dressed up as one.

What the audit actually requires, and by when

Where audit applies, a practising chartered accountant examines the books and issues Form 3CA (where the accounts are already audited under another law, such as the Companies Act) or Form 3CB (in every other case), along with Form 3CD — the detailed statement of particulars covering everything from related-party transactions to TDS compliance to inventory valuation. The CA files this electronically on the income-tax portal; only after that filing is accepted can the taxpayer file the ITR that references it.

The audit report itself is due 30 September 2026 for FY 2025-26, a month ahead of the 31 October 2026 ITR deadline that applies to audit cases — the gap exists precisely so the return can be prepared from finalised, audited figures rather than provisional ones. Transfer-pricing cases requiring Form 3CEB carry their own later date of 30 November.

The cost of getting it wrong

Failing to get accounts audited, or failing to furnish the report by the due date, draws a penalty under section 271B of 0.5% of turnover or gross receipts, capped at ₹1,50,000, whichever is lower. A "reasonable cause" defence exists under section 273B, but in practice it succeeds only for genuine, documented emergencies — a portal outage confirmed by the department, a serious illness, not a client simply running late. The bigger practical cost is usually not the penalty itself: a return filed without a required audit report is treated as defective under section 139(9), which can delay processing, block a loss carry-forward, and draw closer scrutiny than a straightforward late filing would.

Sources

This article is general information, not professional advice. Rules change; verify current provisions or contact the office for advice on your situation.