Tax Audit AY 2026-27: Last Form 3CD Season Before Form 26
For FY 2025-26 / AY 2026-27, nothing has changed in the tax-audit filing form: CAs still file Form 3CA or 3CB with Form 3CD under the Income-tax Act, 1961. The new Form 26 under the Income Tax Act, 2025 applies from Tax Year 2026-27, with the first tax-audit due date falling on 30 September 2027.
That distinction is the current season's biggest confusion. Search demand on CAclub and practitioner forums is already clustering around "Section 44AB is gone", "Form 26", "AY 2026-27 tax audit limit" and "3CA 3CB 3CD replaced". The answer is simple, but easy to misapply:
Facts checked: 26 August 2026 against the Income Tax Department help page, ICAI's current tax-audit guidance listing, and live CAclubIndia practitioner discussions.
| Period | Law / form used | Due date |
|---|---|---|
| FY 2025-26 / AY 2026-27 | Existing Form 3CA, Form 3CB and Form 3CD under the 1961 Act | 30 September 2026, subject to extension |
| Tax Year 2026-27 / AY 2027-28 | New Form 26 under the Income Tax Act, 2025 and Income Tax Rules, 2026 | 30 September 2027 |
So this is the last practical season to clean up the Form 3CD workflow before the form structure changes.
What CAs should verify for AY 2026-27
1. Section 44AB thresholds are unchanged
The Income Tax Department's own help page says the tax-audit thresholds remain the same under Section 63 of the Income Tax Act, 2025, which corresponds to old Section 44AB.
For AY 2026-27:
| Taxpayer | Audit threshold |
|---|---|
| Business | Turnover / gross receipts above Rs. 1 crore |
| Business with cash receipts and cash payments each not above 5 percent | Enhanced threshold up to Rs. 10 crore |
| Profession | Gross receipts above Rs. 50 lakh |
| Presumptive cases | Audit when the presumptive opt-out / lower-profit conditions trigger |
The practical trap is the 5 percent cash test. It is not enough to say "sales are digital". The receipts and payments tests need to be checked against the total relevant inflows and outflows.
2. Form 3CA, 3CB and 3CD still apply this year
For FY 2025-26, the tax-audit report is still filed in the existing form package:
- Form 3CA where the accounts are already audited under another law.
- Form 3CB where the tax audit is the main audit report.
- Form 3CD as the statement of particulars.
That means current-year working papers should still map to the familiar Form 3CD clauses: depreciation, 43B, MSME 43B(h), TDS/TCS, GST reconciliation, cash loans and deposits, and so on.
Use the existing Form 3CA, 3CB and 3CD guide for this filing season.
3. Form 26 is not a reason to delay workflow changes
Form 26 is coming, but it does not make AY 2026-27 a waiting year.
The Income Tax Department describes the new form as a unified smart form that consolidates the old 3CA, 3CB and 3CD structure, aligns audit reporting with ITR reporting, adds structured schedules and includes dedicated reporting fields for membership number, FRN and UDIN.
That direction is clear: more structured data, less free-form drafting, more direct reconciliation between audit report and return.
Firms that still build 3CD manually in spreadsheets will feel the transition more sharply than firms that already compute clause-level numbers from books, GST, TDS and fixed-asset data.
What to fix before 30 September 2026
Clause 22: MSME 43B(h)
For AY 2026-27, the MSME reporting pressure is still live. The audit file should not merely list unpaid MSME creditors. It should show:
- vendor classification basis,
- payment due date,
- actual payment date,
- amount unpaid as at year-end,
- 43B(h) disallowance,
- and limitation where the MSME register may be incomplete.
See MSME payables audit: Section 15, 16 and 43B(h).
Clause 34: TDS/TCS
Clause 34 remains one of the most data-heavy parts of Form 3CD. The working paper needs to reconcile:
- deductible amount,
- tax deducted / collected,
- tax deposited,
- challan and return evidence,
- Form 26AS / AIS where relevant,
- and interest or late-fee exposure.
See Form 3CD Clause 34 - TDS/TCS compliance and the TDS rate finder.
Depreciation and fixed assets
Do not treat depreciation as a number copied from the client's books. A defensible tax-audit file needs:
- fixed-asset register,
- block classification,
- additions before / after 180 days,
- sale or discard treatment,
- difference between Companies Act depreciation and Income-tax depreciation,
- and explanation of major movement.
Use the depreciation comparison calculator where needed.
GST and turnover tie-out
The Form 3CD turnover number should not live in isolation. It should be tied to:
- books,
- GSTR-1,
- GSTR-3B,
- financial statements,
- credit notes and debit notes,
- exempt / non-GST turnover,
- and any reconciliation explanation.
This is where Form 26 is likely to increase pressure, because the new reporting direction is toward structured schedules and ITR alignment.
The practical Form 26 preparation checklist
Use the 2026 season to build habits that will carry into Form 26:
- Stop drafting Form 3CD answers from memory.
- Build clause-wise source-data links.
- Preserve the export version used for the signed report.
- Tie TDS, GST, fixed assets and MSME schedules to the report.
- Review exceptions before portal entry, not after upload.
- Keep UDIN and FRN details part of the workflow, not a last-minute step.
- Document unresolved data limitations plainly.
The point is not to guess Form 26 clause wording. It is to make the current audit file structured enough that the new form is a mapping change, not a process shock.
Frequently Asked Questions
Is Form 3CD replaced for AY 2026-27?
No. For FY 2025-26 / AY 2026-27, tax audit reports still use Form 3CA, Form 3CB and Form 3CD under the Income-tax Act, 1961.
When does Form 26 apply?
Form 26 applies from Tax Year 2026-27 under the Income Tax Act, 2025 and Income Tax Rules, 2026. The first tax-audit due date for that form is 30 September 2027.
Has the tax audit threshold changed under the new Income Tax Act, 2025?
No. The Income Tax Department says the thresholds under new Section 63 remain aligned with old Section 44AB: Rs. 1 crore for business, Rs. 10 crore where the cash-transaction conditions are met, and Rs. 50 lakh for profession.
What should CAs do differently this season?
Use AY 2026-27 to clean the evidence workflow: clause-wise source data, GST and TDS reconciliation, MSME 43B(h) support, depreciation workings, and version-controlled report evidence. That is what will make the Form 26 transition easier.
Sources: Income Tax Department tax audit forms FAQ, ICAI Direct Taxes Committee publications, ICAI Guidance Note on Tax Audit, Revised 2026, CAclubIndia AY 2026-27 Form 3CA/3CB/3CD guide, CAclubIndia Section 44AB / new Act discussion.
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