Section 63, Income-tax Act 2025: Tax audit

What changed when Section 44AB became Section 63?

The thresholds did not move; the address did. The audit lines (₹1 crore for a business, ₹50 lakh for a profession, ₹10 crore where cash stays within 5%) are exactly the ones Section 44AB used. What the 2025 Act changed is the surrounding scaffolding, and the cross-references matter in practice.

Books of account, which used to sit in Section 44AA, are now Section 62. The presumptive schemes that decide most audit questions moved from 44AD, 44ADA and 44AE into Section 58 for residents, with Section 61 holding the non-resident presumptive rules. The return-filing deadline that anchors the audit due date is Section 263(1), previously 139(1). And the penalty for missing the audit shifted from 271B to Section 446.†

One reading of the new wording has teeth. Section 63 makes an audit compulsory when declared profit falls below the deemed rate under Section 58(2) or 61(2). Under the old law a business with thin margins that never opted into presumptive taxation could stay out of audit simply by keeping books; analyses of Section 63 read it as removing that cushion, so a low-margin declaration can now trigger the audit on its own. The trap-rule section below returns to this.

Section number, title and thresholds cross-checked against published copies of the enacted Act; the reading that a business which never elected presumptive taxation is now caught by a low-margin declaration is analysis of the enacted text, not settled practice.†

Who needs a tax audit under Section 63?

Anyone carrying on a business or profession who crosses one of the lines below. Section 63 opens by requiring every person carrying on a business or profession who meets any condition in its table to get the accounts audited by an accountant before the specified date. Salaried people with no business or profession are outside it entirely.

You need the audit if:

• You run a business and your turnover, sales or gross receipts cross ₹1 crore for the tax year. The line rises to ₹10 crore only when cash receipts are at most 5% of total receipts and cash payments are at most 5% of total payments.
• You carry on a profession and your gross receipts cross ₹50 lakh. There is no ₹10 crore relaxation for professions.
• You declare profit below the deemed rate of a presumptive scheme (Section 58 for residents, Section 61 for certain non-residents) while your total income is above the basic exemption.
• You are already audited under another law, such as a company under the Companies Act. You do not repeat the audit, but you still file the Section 63 report that refers to it.

A person whose turnover is under the line and who declares at or above the presumptive rate needs no audit at all. That is the position most small businesses and freelancers are in.

The audit lines in one table

Two of these lines are size tests and two are behaviour tests. Cross a size test and the audit is automatic. The behaviour tests bite only when you use, or are treated as using, a presumptive scheme and then report less than it deems.

The routing of the below-deemed triggers through Section 58(2) and 61(2) is cross-checked against published copies of the enacted Act.†

How to check whether you need an audit

Four checks, in order:

• Are you carrying on a business or profession at all? If your only income is salary, interest, rent or capital gains, Section 63 does not apply to you.
• Find your size line. Business: ₹1 crore of turnover, or ₹10 crore if cash receipts and cash payments each stay within 5%. Profession: ₹50 lakh of gross receipts.
• Compare your actual turnover or receipts with that line. Over it, the audit is required. Under it, go to the last check.
• Are you declaring profit below a presumptive scheme's deemed rate (6% or 8% of business turnover, 50% of professional receipts) while your income is above the basic exemption? If yes, the audit is required even under the size line. If no, no audit is due.

How the ₹10 crore limit and the 5% cash test work

The higher ₹10 crore audit line is a reward for going digital, and it has two conditions that must both hold. Your cash receipts for the year must be at most 5% of total receipts, and your cash payments must be at most 5% of total payments. Fail either test and your line drops back to ₹1 crore.

What counts as non-cash is broad: bank transfers, UPI, cards, account-payee cheques and drafts, and electronic clearing all sit outside the 5%. Bearer cheques and amounts paid out in cash count against you. Because the test runs on payments as well as receipts, a business that collects everything by UPI but settles a chunk of its expenses in cash can still fail it.

The 5% payments test is where digital-first businesses trip: watch cash wages, cash purchases and petty expenses, not only what customers pay you.

How presumptive taxation keeps you out of audit

This is the lever most small businesses pull. The presumptive scheme in Section 58 lets a resident business declare 6% of digital turnover and 8% of cash turnover as profit, with no books under Section 62 and no audit under Section 63, up to ₹2 crore of turnover (₹3 crore where cash receipts stay within 5%). A profession declares 50% of gross receipts on the same no-audit terms, up to ₹50 lakh (₹75 lakh on the same cash condition).

The gap this fills is the stretch between ₹1 crore and ₹2 crore. A trader turning over ₹1.4 crore is above the ₹1 crore audit line, so normal books would need auditing; declare the presumptive 6% to 8% under Section 58 and the audit requirement simply does not arise. That is the single most common reason a growing business opts into presumptive taxation.

The catch is the mirror image, covered in the next section: declare below the deemed rate and you flip straight into audit, and, for a business, leaving the scheme locks you out of it for five years. Our Section 58 page walks through the rates, limits and the lock-out in full.

When a low profit declaration forces the audit

Size is not the only trigger. If you declare profit below the rate a presumptive scheme deems, and your total income for the year is above the basic exemption (₹4 lakh under the new regime for most individuals), Section 63 requires an audit even when your turnover is nowhere near ₹1 crore.

For a resident this keys off Section 58: declare less than 6% or 8% of business turnover, or less than 50% of professional receipts, and the audit follows. For certain non-residents it keys off Section 61 the same way. The rule exists to stop taxpayers using presumptive rates as a floor in good years and real, lower books in lean ones with no independent check.

Here is the contested edge. The old law tied this trigger to taxpayers who had actually elected presumptive taxation and then declared lower. Analyses of Section 63 read its reference to Section 58(2) more widely, catching a low-margin business that never opted in at all. If that reading holds, a genuinely low-profit year can require an audit on its own. Treat a below-deemed declaration as an audit decision, not only a tax one, until the position settles.

The wider reading of the below-deemed trigger is drawn from analysis of the enacted text and cross-checked against published copies of the Act.†

Which forms: 3CA, 3CB, 3CD and the new Form 26

The audit produces two documents: a report and a statement of particulars. Under the 1961 Act the report is Form 3CA when your accounts are already audited under another law, or Form 3CB when they are not, and the particulars ride along in Form 3CD, a schedule of more than forty clauses covering everything from method of accounting to loan disclosures and TDS compliance.

The 2025 Act reissues the same content as Form 26: Part A or Part B for the report, depending on whether another law already audits you, and Parts C and D for the particulars. Forms 3CA, 3CB and 3CD continue to apply for audits up to assessment year 2026-27, the last year of the old Act; Form 26 takes over from the first year of the new one.

The Form 26 structure is set by the Income-tax Rules and cross-checked against published copies of the notified rules; the clause numbering may settle differently.†

The deadlines: the specified date and the return

The audit report is due by what Section 63 calls the specified date: one month before the due date for filing the return under Section 263(1).† For a business or profession that needs an audit, that ordinarily means the report is signed and uploaded by 30 September, with the return itself due 31 October, for a normal financial year.

Where transfer-pricing reporting applies, both dates move out by a month: the report by 31 October, the return by 30 November. The order is fixed. The accountant signs the report first, then you file the return quoting it. File the return without the report and it can be treated as defective.

The department can extend these dates for a given year; the 30 September and 31 October pattern is the standing rule, not a guarantee for every year.

The penalty for skipping the audit

Miss the audit or file it late and the charge is 0.5% of turnover or gross receipts, capped at ₹1,50,000. On ₹1.4 crore of turnover that is ₹70,000; on ₹4 crore it reaches the ₹1,50,000 ceiling and stops there. This was Section 271B of the 1961 Act and is Section 446 of the 2025 Act.†

The charge is not automatic. If you can show reasonable cause for the failure (a genuine dispute over whether the audit applied, an auditor's death or resignation, records lost to fire or flood), it can be waived. Not knowing the rule applied is not reasonable cause; a documented, unavoidable reason is.

The 0.5% rate and the ₹1,50,000 cap carry over unchanged; the 2025 Act section number (446) is cross-checked against published copies of the enacted Act.†

Should you use presumptive taxation to dodge the audit?

It backfires when your margin is thinner than the deemed rate. Take a distributor on ₹1.8 crore of turnover earning a real 3% margin, about ₹5,40,000. Under presumptive taxation at 6% to 8% the deemed profit is roughly ₹10.8 lakh to ₹14.4 lakh, so you would pay tax on two to three times what you actually made. Here the audited-books route, even with an auditor's fee of a few tens of thousands, is far cheaper than the extra tax, and the audit is simply the price of declaring your true ₹5,40,000.

Two more cautions. If you carry forward business losses you want to set off, presumptive income is read as blocking that set-off, so the audit route can protect a real deduction. And leaving Section 58 after opting in locks you out of the scheme for five years, with books and audit throughout, so treat the choice as a multi-year one. Run both routes through the presumptive and income-tax calculators below before deciding.

Presumptive taxation is the cheaper route when:

• Your real profit margin is at or above the deemed rate. A consultant whose costs run 25% of receipts is taxed on 50% either way, so declaring 50% under Section 58 and skipping the audit is pure saving on compliance.
• You value simplicity: no books under Section 62, no auditor's fee, one advance-tax date on 15 March, the short ITR-4 return.
• Your receipts are mostly digital, so the 6% business rate applies instead of 8%.

Worked examples

Section 63 FAQs

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