Form 3CD Clause 10 for AY 2026-27: Nature of Business & Changes

Direct answer: Form 3CD Clause 10 requires the tax auditor to state every material business or professional activity carried on during FY 2025-26 and to report any material change in that nature during the year. For AY 2026-27, this continues to be reported in Form 3CD under the Income-tax Act, 1961.

Update — 28 September 2026: CBDT changed the specified ordinary AY 2026–27 tax-audit report deadline from 30 September to 21 October 2026 and the related audited return deadline from 31 October to 21 November 2026. Transfer-pricing Form 3CEB cases follow a separate timeline. Official Income Tax Department announcement.

What Clause 10 requires

Clause 10(a) asks for the nature of each business or profession carried on during the previous year. Where an assessee operates more than one line, the reporting should not collapse materially different activities into one vague label. Clause 10(b) asks for particulars of any change in the nature of business or profession.

What counts as a change in nature of business?

A material change can include moving from manufacturing to trading, changing the principal line of business, adding a new line of business, or permanently discontinuing an existing line. By contrast, a routine operational change that does not alter the underlying business model should not automatically be treated as a Clause 10(b) change. The key is substance: did the commercial activity carried on by the assessee materially change?

Why Clause 10 matters beyond Form 3CD

Clause 10 is easy to treat as a descriptive field, but an inaccurate classification can create inconsistencies across the tax audit report, financial statements, GST registrations and returns, ITR business codes, transfer-pricing documentation, MSME disclosures and industry-specific ratios. A business described as a manufacturer in one record and a pure trader in another may invite avoidable questions even where the underlying tax computation is otherwise correct.

AY 2026-27 transition: old forms still apply

FY 2025-26 is assessed as AY 2026-27 under the Income-tax Act, 1961. The Income Tax Department confirms that the tax audit for this year continues to use Form 3CA or Form 3CB together with Form 3CD, with the ordinary tax-audit report due on 21 October 2026. Form 26 under the Income Tax Act, 2025 applies from Tax Year 2026-27 instead.

Practical example

Suppose a company manufactured engineering components until September 2025 and, after shutting the plant, continued only as an importer and distributor for the remainder of FY 2025-26. Describing the entire year merely as “trading” would lose a material fact. The audit file should document the manufacturing activity, the later trading activity, the date and commercial evidence of the transition, and the corresponding Clause 10(b) disclosure.

Clause 10 pre-filing checklist

1. Obtain the current and prior-year Form 3CD and compare the stated activities. 2. Reconcile business descriptions with the financial statements and revenue ledgers. 3. Check GST registration business details and major HSN/SAC revenue streams. 4. Identify new, discontinued or materially transformed lines of business. 5. Review board/partner resolutions, licences, plant closures, new contracts and segment reporting. 6. Confirm that the ITR business code is consistent with the commercial substance. 7. Document why operational changes were or were not treated as a change in nature. 8. Preserve supporting evidence in the tax-audit working papers.

Common Clause 10 mistakes

Common errors include copying the prior-year description without checking current operations; using generic labels such as “services” despite multiple material service lines; failing to report a permanent discontinuance; treating a new business line as merely a new customer or product; and allowing the ITR, GST profile and Form 3CD to describe materially different activities without reconciliation.

FAQs

Does every new product require Clause 10(b) reporting?

No. A new product within the same established line of business does not necessarily change the nature of the business. Materiality and commercial substance matter.

If a company carries on two businesses, should both be reported?

Yes. Clause 10(a) expressly contemplates more than one business or profession and requires the nature of each to be stated.

What is the tax-audit due date for AY 2026-27?

For ordinary tax-audit cases, the Income Tax Department confirms 21 October 2026. Transfer-pricing cases generally follow the separate statutory timeline.

Related PGT & Associates guides

For the broader filing framework, see: https://www.pgtandassociates.com/post/tax-audit-ay-2026-27-forms-deadline For books and records, see: https://www.pgtandassociates.com/post/form-3cd-clause-11-books-account For choosing the Section 44AB limb, see: https://www.pgtandassociates.com/post/form-3cd-clause-8-section-44ab

Primary references

Income Tax Department — AY 2026-27 tax-audit forms and transition guidance: https://www.incometax.gov.in/iec/foportal/help/all-topics/e-filing-services/income-tax-forms Income Tax Department — Form 3CA/3CD and Form 3CB/3CD guidance: https://www.incometax.gov.in/iec/foportal/downloads/income-tax-forms ICAI — Tax Audit guidance and Clause 10 professional guidance: https://www.icai.org/post/icai-publications-direct-taxes-committee

Need a Clause-by-Clause Tax Audit Review?

PGT & Associates assists businesses and professionals with Section 44AB applicability, Form 3CD reconciliation, pre-filing reviews and tax-audit documentation. For professional assistance, visit https://www.pgtandassociates.com/contact.

Disclaimer: This article is for general professional information and does not constitute legal, tax or audit advice. Applicability depends on the taxpayer’s facts, records and law in force on the relevant date.