Update, 28 September 2026: CBDT has extended two AY 2026-27 dates for taxpayers whose accounts are audited: the tax audit report to 21 October 2026 and the income tax return to 21 November 2026 (announced 28 September 2026). Other dates are unchanged unless separately notified.
What a tax audit covers, and why it exists separately from a statutory audit
A tax audit exists to verify, from a tax perspective, that income is being computed and reported correctly — it checks compliance with the Income Tax Act specifically, rather than giving a general opinion on the financial statements the way a statutory audit does. Form 3CD alone runs to more than 40 clauses covering depreciation, disallowances, TDS compliance, GST reconciliation, loans taken or repaid in cash, and several other specific areas the Act treats as reportable.
A company that's already subject to a statutory audit under the Companies Act still needs a separate tax audit if it crosses the Section 44AB threshold — the two serve different purposes and are reported to different authorities, even though the same Chartered Accountant commonly performs both for the same client in the same season.
One point worth being precise about: Assessment Year 2026-27, covering income earned in Financial Year 2025-26, continues to be governed by the Income Tax Act, 1961 and Section 44AB specifically. A new Income Tax Act, 2025 is now in force for later tax years, under which the tax audit provision is renumbered as Section 63 and the audit report moves to a new form — but that transition does not affect the filing covered on this page.
Thresholds in detail
| Category | Threshold | Condition |
|---|---|---|
| Business — standard | Turnover > ₹1 crore | Applies by default |
| Business — enhanced digital threshold | Turnover > ₹10 crore | Only where cash receipts are 5% or less of total receipts and cash payments are 5% or less of total payments — both conditions must hold; failing either reverts the limit to ₹1 crore |
| Profession | Gross receipts > ₹50 lakh | Flat threshold — no enhancement for digital transactions |
| Presumptive business (Section 44AD) | Income declared below the deemed rate, with total income above the exemption limit | Triggers audit even if turnover itself is below the general threshold |
| Presumptive profession (Section 44ADA) | Income declared below 50% of gross receipts, with total income above the exemption limit | Same principle — declaring below the deemed rate can trigger an audit independent of the receipts threshold |
A separate and often-confused figure is the presumptive taxation ceiling itself — the maximum turnover or receipts at which a business or professional may opt into the simplified Section 44AD or 44ADA scheme in the first place (₹3 crore for eligible businesses, ₹75 lakh for eligible professionals, subject to the same cash-transaction conditions). That ceiling decides eligibility for presumptive taxation; it is not the same number as the Section 44AB audit trigger described above, and the two are easy to conflate.
Tax audit compared with statutory audit
| Feature | Tax Audit | Statutory Audit |
|---|---|---|
| Applies to | Businesses and professionals above the Section 44AB threshold | Every company, regardless of turnover |
| Governing law | Income Tax Act, 1961 | Companies Act, 2013 |
| Report filed with | Income tax portal (Form 3CA/3CB and 3CD) | Registrar of Companies (via AOC-4) |
| A proprietorship or partnership can be subject to it? | Yes — the threshold applies regardless of entity type | No — only companies |
Documents required
- Complete books of account for the year — cash book, bank book, ledgers, journal.
- Sales and purchase registers, and copies of GST returns filed for the year.
- Bank statements for all accounts, and loan account statements.
- Fixed asset register, with depreciation computed as per the Income Tax Act (which differs from Companies Act depreciation).
- Details of cash transactions — cash sales, cash payments above the prescribed limits, and cash loans taken or repaid.
- TDS returns filed and TDS certificates received, for reconciliation against Form 26AS and the Annual Information Statement.
- Details of any loans, deposits or specified sums received or repaid otherwise than by account payee cheque or bank transfer.
- Stock records and inventory valuation basis.
- The prior year's tax audit report, if applicable.
The tax audit process, step by step
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Threshold check
Turnover or gross receipts for the year are computed and checked against the applicable threshold, including the cash-transaction test for the enhanced business limit — this determines whether an audit is required at all, and under which clause.
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Books review and reconciliation
Books are reviewed against GST returns, TDS returns and Form 26AS/AIS data. Mismatches — a common source of later scrutiny — are identified and resolved or explained before the report is drafted.
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Form 3CD preparation
Each of the clauses in Form 3CD is worked through against the books and supporting records — depreciation, disallowances under Sections 40, 40A and 43B, cash transaction reporting, and the other prescribed particulars.
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Draft report review with the client
Observations that affect the report — a disallowance, a cash-transaction breach, an unreconciled GST figure — are discussed before the report is finalised, not raised for the first time after filing.
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Filing with UDIN
Form 3CA or 3CB, along with Form 3CD, is filed on the income tax portal, and the signing Chartered Accountant generates a UDIN for the report.
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Feeding into the income tax return
The audited figures then form the basis for the ITR itself, which is filed by the separate ITR due date — the tax audit report and the return are two different filings, on two different forms, due on two different dates.
Due dates and penalties
| Filing | Due date |
|---|---|
| Tax audit report (Form 3CA/3CB and 3CD) | 21 October 2026 — extended from 30 September 2026 |
| Income tax return for audited taxpayers | 21 November 2026 — extended from 31 October 2026 |
| Income tax return where a transfer pricing report also applies | 30 November 2026 (audit report itself due 31 October 2026 in these cases) |
| Default | Consequence |
|---|---|
| Failure to get accounts audited, or to furnish the report by the due date | A fee of 0.5% of turnover or gross receipts, capped at ₹1.5 lakh, under Section 271B |
| Filing the ITR without the required tax audit | The return can be treated as defective, in addition to the fee above |
Practical notes from our engagements
- Turnover miscomputed for the threshold test. GST collected on behalf of customers, and the turnover treatment of derivative or speculative transactions, are two of the most common places we see the threshold computed incorrectly — sometimes triggering an audit that wasn't actually required, sometimes missing one that was.
- The 5% cash test checked only on receipts, not payments. Both cash receipts and cash payments have to independently stay within 5% of their respective totals for the ₹10 crore business threshold to apply. A single large cash payment can break the enhanced limit even if cash receipts are negligible.
- Presumptive scheme exit not thought through. A business that declared income under Section 44AD in a prior year and then declares below the deemed rate can trigger both an audit requirement and a five-year restriction on re-entering the presumptive scheme — a bigger consequence than most people expect from what looks like a routine year-on-year dip in declared profit.
- Cash loans and deposits not disclosed. Loans or deposits taken or repaid in cash above the prescribed limits are specifically reportable in Form 3CD and separately penalised under other sections of the Act — this is not simply a bookkeeping preference, it's a compliance requirement.
- GST and tax audit figures left unreconciled until the last week. Since Form 3CD requires GST reconciliation, leaving this until just before the September deadline is the single most common reason a tax audit runs late.
How we handle a tax audit
We start with the threshold computation itself, since getting that wrong is the root cause of most later problems — an audit triggered incorrectly, or one that's missed. From there, the books are reconciled against GST and TDS filings before Form 3CD is drafted, so that observations surface with enough time to address them before the September deadline, not in the final week.
Where we also handle your statutory audit or your GST compliance, the same team coordinates all three, since the figures in each have to agree with each other in the end regardless of which filing they first surface in.
Related services
Frequently asked questions
What is the tax audit turnover limit for a business in AY 2026-27?
₹1 crore, raised to ₹10 crore where cash receipts and cash payments are each 5% or less of their respective totals. Failing either condition brings the limit back down to ₹1 crore.
What is the tax audit limit for professionals?
₹50 lakh in gross receipts, flat — there is no digital-transaction enhancement for professionals under Section 44AB, unlike for businesses.
Is the ₹75 lakh figure I've seen online the same as the audit threshold?
No — ₹75 lakh (with the digital-receipts condition) is the ceiling for opting into the Section 44ADA presumptive taxation scheme, which is a different threshold from the ₹50 lakh audit trigger under Section 44AB. The two get conflated often; they answer different questions.
I declared a loss this year. Do I still need a tax audit?
Possibly, yes — if you're on a presumptive scheme and declare below the deemed rate while your total income is above the exemption limit, the audit requirement applies regardless of whether the result is a profit or a loss.
Does a company that already has a statutory audit also need a tax audit?
Yes, if it crosses the Section 44AB threshold — the two are separate requirements under separate Acts, even though the same Chartered Accountant commonly signs both reports.
What is the due date for the tax audit report for FY 2025-26?
21 October 2026 after the CBDT extension (the statutory date was 30 September 2026), with the related income tax return due by 21 November 2026 (extended from 31 October) — two different filings on two different forms, due on two different dates.
What's the penalty for missing the tax audit deadline?
A fee of 0.5% of turnover or gross receipts, capped at ₹1.5 lakh, under Section 271B.
Does the new Income Tax Act, 2025 change the tax audit rules for this filing?
Not for AY 2026-27 — that year continues under the 1961 Act and Section 44AB. The 2025 Act's replacement provision, renumbered Section 63, applies to later tax years.
If I opt out of the presumptive scheme, does that trigger an audit?
Opting out itself doesn't automatically trigger an audit, but if you'd previously used Section 44AD and now declare profit below the deemed rate with income above the exemption limit, an audit is required, and re-entry into the presumptive scheme can be restricted for five years.
Are cash transactions checked separately for receipts and payments?
Yes. For the enhanced ₹10 crore business threshold, cash receipts must be 5% or less of total receipts, and cash payments must independently be 5% or less of total payments. Both tests have to pass.
Can the tax audit report be filed after the ITR?
No — the audit report has its own earlier due date (30 September) and is meant to be filed before, and to feed into, the return that follows it (due 31 October).