Summary: Companies that appointed or reappointed statutory auditors at annual general meetings held on 30 September 2026 should examine the 15-day notice requirement under section 139(1) of the Companies Act, 2013 and rule 4 of the Companies (Audit and Auditors) Rules, 2014. For an appointment actually made at a 30 September meeting, the ordinary 15-day filing date falls on 15 October 2026. This is an event-based calculation, not a universal deadline for every company. The company must distinguish a new appointment or reappointment from an auditor merely continuing during an existing statutory term. It should also obtain the auditor’s written consent and eligibility certificate, check disqualifications and rotation, and file accurate particulars with the Registrar of Companies. The 2025 revised ADT-1 form includes first-auditor categories, but professional commentary differs on whether a changed form by itself resolves the statutory filing obligation for a Board-appointed first auditor under section 139(6). This article separates clear statutory requirements from that interpretive issue and provides a practical filing checklist.
Why 15 October 2026 matters, but only for relevant appointments
section 139(1) of the Companies Act, 2013 requires the company to notify the Registrar of Companies of an auditor appointment within fifteen days of the meeting in which the auditor is appointed. The Explanation to the section treats appointment as including reappointment. Therefore, where members actually appointed or reappointed an auditor at an annual general meeting held on 30 September 2026, the ordinary fifteen-day calculation leads to 15 October 2026. This deadline is not tied to the financial year-end alone. A company whose AGM occurred on a different date must calculate the period from its own appointment event.
The first control is to read the AGM notice and minutes rather than assume that every company must file ADT-1 after every September AGM. Under section 139, an auditor may hold a statutory term running from the conclusion of one AGM until the conclusion of the sixth AGM, subject to applicable exceptions and rotation rules. If no appointment or reappointment occurred because the existing appointment continues, a fresh annual ADT-1 should not be inferred solely from the fact that an AGM was held. Conversely, a genuine new appointment cannot be ignored because the auditor served the company previously.
| Event or situation | Primary question | Ordinary compliance approach |
|---|---|---|
| Auditor appointed at AGM on 30 September 2026 | Was a section 139(1) appointment made? | Check ADT-1 by 15 October 2026 |
| Auditor appointed at AGM on another date | What is actual meeting date? | Count 15 days from that event |
| Existing auditor continuing within approved term | Was there a fresh appointment? | Do not assume annual ADT-1 automatically |
| First auditor appointed by Board | Does revised form alter filing obligation? | Review section 139(6), rule 4 and current MCA filing guidance |
| Auditor resigns before term ends | Is this resignation or replacement? | Consider ADT-3 and casual-vacancy rules separately |
- Section 139(1): appointment, tenure and notice to Registrar
- Auditor rotation is a separate substantive check
- Rule 4, Form ADT-1 and the 2025 revised format
- First auditor under section 139(6): keep law and interpretation separate
- What must be checked before preparing ADT-1?
- Consequences of delay and incorrect filings
- Accounting, audit and governance implications
- October 2026 action checklist and conclusion
- Frequently Asked Questions
- 1. Is 15 October 2026 the ADT-1 deadline for every company?
- 2. Must ADT-1 be filed after every AGM?
- 3. Who files ADT-1: the company or the auditor?
- 4. What changed in ADT-1 from 14 July 2025?
- 5. Is filing ADT-1 for a Board-appointed first auditor unquestionably mandatory?
- 6. Does an accepted ADT-1 cure an ineligible auditor appointment?
- 7. What proof should the company retain?
- Key Takeaways
Section 139(1): appointment, tenure and notice to Registrar
A company other than one covered by special governmental appointment provisions generally appoints its statutory auditor at its first annual general meeting. The appointment ordinarily lasts from the conclusion of that AGM until the conclusion of the sixth AGM, subject to the Act and the specific facts. The law also requires written consent and a certificate from the proposed auditor before appointment. The company must notify the auditor of the appointment and file the statutory notice with the Registrar within fifteen days. The obligation to file is on the company; the auditor’s consent or signature does not substitute for the company’s electronic submission.
The written eligibility certificate should address whether the auditor or audit firm is qualified and not disqualified under the Companies Act, the Chartered Accountants Act and relevant rules, whether the appointment is within the statutory term and applicable numerical limits, and the accuracy of the professional-proceedings disclosure. Section 141 contains substantive eligibility and disqualification rules. These are not merely form-filling statements: an ineligible appointment may create audit validity, governance and reporting problems beyond a delayed ROC fee.
Auditor rotation is a separate substantive check
Section 139(2) imposes rotation limits on specified companies, with one five-year term for an individual auditor and two consecutive five-year terms for an audit firm, subject to the applicable cooling-off requirements. Whether a company falls within the rotation regime depends on its classification and prescribed thresholds under the Companies (Audit and Auditors) Rules. Listed companies and prescribed public, private or borrowing-based categories require special attention. An ADT-1 upload cannot cure a substantive rotation breach; the company should complete the eligibility and tenure assessment before passing the appointment resolution.
Rule 4, Form ADT-1 and the 2025 revised format
rule 4 of the Companies (Audit and Auditors) Rules, 2014 deals with conditions for appointment and notice to the Registrar. Form ADT-1 is the prescribed electronic notice for appointments falling under the statutory filing framework. The Companies (Audit and Auditors) Amendment Rules, 2025, notified as G.S.R. 359(E) on 30 May 2025 and effective from 14 July 2025, replaced several auditor-related forms including ADT-1. The amendment also changed the manner of reporting certain frauds through ADT-4. Compliance teams should therefore use the current MCA V3 form and instructions rather than an old downloaded template.
The revised ADT-1 format contains additional appointment categories and fields. A revised form can provide an electronic pathway for a transaction without necessarily amending every underlying statutory obligation. This distinction matters especially for first auditors. Some professional articles conclude that including first-auditor appointments in the new form makes filing mandatory for a Board-appointed first auditor; other legal analyses observe that section 139(1) expressly governs appointment at a meeting while section 139(6) is a distinct provision. The notification should be read in full before asserting that an amended form alone settled the statutory question.
First auditor under section 139(6): keep law and interpretation separate
For a non-government company, section 139(6) ordinarily directs the Board to appoint the first auditor within thirty days of incorporation; if the Board fails, members appoint within the prescribed further process. That appointment lasts until the first AGM. Historically, the interaction of rule 4 and first-auditor filings generated debate. The 2025 form changes have renewed that debate. A prudent company should inspect the latest operative rule, MCA filing instructions and any formal clarification, document its legal position and avoid presenting commentary as a binding government notification. Where the portal supports the filing and the company chooses to file, that practical action should be distinguished from a definitive conclusion about the statutory source of the obligation.
What must be checked before preparing ADT-1?
The corporate secretarial team should reconcile the corporate identification number, registered office, AGM date, resolution date, auditor name, membership number or firm registration number, PAN and contact particulars against the company records. It should check whether an individual or firm was appointed, the exact term approved, whether an audit committee recommendation was required, and whether the appointment falls under a special company category. A mismatch between the AGM minutes and electronic form can be more serious than a simple typographical error because it may misstate the authority or duration of the auditor’s engagement.
The appointment documentation ordinarily includes the signed consent, section 141 eligibility certificate, AGM notice, relevant explanatory statement if required, minutes or certified resolution, appointment communication and authorisation for electronic filing. The latest MCA form may prescribe different attachments or validations depending on the appointment category. Accordingly, the checklist should be tested against the live form rather than copied from a 2014 filing manual. Companies should preserve the final signed documents and the service request number generated by the portal.
| Review stage | Specific evidence | Owner or reviewer |
|---|---|---|
| Corporate event | AGM minutes and actual appointment resolution | Company secretary or authorised officer |
| Auditor eligibility | Consent, section 141 certificate, rotation worksheet | Board/audit committee |
| Form accuracy | CIN, auditor details, appointment term, meeting date | Preparer and independent reviewer |
| Portal filing | Current ADT-1 form, fee challan, SRN and acknowledgement | Authorised signatory |
| Post-filing controls | Registrar status, audit engagement and disclosures | Secretarial and finance teams |
Consequences of delay and incorrect filings
A filing made after the prescribed date may attract additional filing fees under the Companies (Registration Offices and Fees) Rules, 2014 and any currently applicable amendments or MCA relaxations. The precise amount depends on the form, delay and operative fee schedule; an old internet fee chart should not be treated as current without verification. Separately, contravention of substantive appointment provisions can engage statutory consequences under the Companies Act. It is important to distinguish an additional ROC filing fee from a penalty imposed through an adjudicatory process and from a substantive defect in the auditor’s eligibility.
A company should not conceal a missed filing by changing the recorded meeting date or backdating consent. If the AGM or appointment occurred later than originally planned, retain the contemporaneous evidence explaining the actual event. Where an auditor resigned, section 140 and Form ADT-3 raise distinct reporting obligations for the auditor; a replacement appointment can also require examination of section 139(8) on casual vacancies. These are separate legal pathways and should not be treated as ordinary five-year reappointments without analysis.
Accounting, audit and governance implications
Auditor appointment records affect the audit engagement, statutory financial-statement sign-off, audit committee oversight and subsequent annual filing processes. Finance teams should confirm that the person signing the audit report is the properly appointed and eligible auditor for the relevant reporting period. Where the appointment status is uncertain, the company should resolve the issue before finalising its audit timetable rather than assume that an electronically accepted form validates the underlying appointment. The statutory auditor should likewise consider the engagement acceptance and independence requirements of applicable professional standards.
For groups with several subsidiaries, a central tracker should distinguish the AGM date, actual appointment event, statutory term end, rotation applicability, consent date, filing date, SRN and final ROC status. This is especially important when different subsidiaries hold AGMs on different dates. A universal 15 October deadline may cause unnecessary filings for some companies and late filings for others. Event-based tracking is a better internal control than a single annual reminder.
October 2026 action checklist and conclusion
As of 13 October 2026, a company that appointed an auditor on 30 September has a short ordinary filing window remaining. It should first verify that the appointment actually occurred, confirm eligibility and the signed documentation, complete the latest MCA ADT-1, independently review every field, pay the applicable fee and retain the acknowledgement. If the first-auditor issue or a special company category is involved, obtain a reasoned view grounded in the current text rather than relying on a generic checklist. The objective is not merely a timely SRN but a valid, accurately documented appointment.
Frequently Asked Questions
1. Is 15 October 2026 the ADT-1 deadline for every company?
No. It is the ordinary fifteen-day date for an auditor appointment or reappointment actually made at a meeting on 30 September 2026. A different appointment date produces a different deadline.
2. Must ADT-1 be filed after every AGM?
Not merely because an AGM was held. Determine whether an appointment or reappointment occurred. An auditor continuing within an existing approved term is not automatically a fresh appointment each year.
3. Who files ADT-1: the company or the auditor?
The company is responsible for the statutory notice under section 139(1). The auditor provides consent and eligibility information, but these documents do not replace the company’s filing.
4. What changed in ADT-1 from 14 July 2025?
The MCA substituted the prescribed ADT forms through G.S.R. 359(E), effective 14 July 2025. The revised electronic format includes expanded appointment categories and particulars; current portal instructions should be followed.
5. Is filing ADT-1 for a Board-appointed first auditor unquestionably mandatory?
There is a genuine interpretive issue in professional commentary. Section 139(6) governs first auditors, while the explicit fifteen-day notice wording appears in section 139(1). The revised form supports first-auditor entries; companies should check current operative rules and formal MCA clarification before stating a universal legal conclusion.
6. Does an accepted ADT-1 cure an ineligible auditor appointment?
No. Electronic acceptance does not override section 141 disqualifications, section 139 rotation requirements or other substantive statutory conditions.
7. What proof should the company retain?
Preserve the AGM minutes, appointment resolution, auditor consent, eligibility certificate, tenure/rotation review, completed ADT-1, fee record, SRN and final ROC status.
Key Takeaways
- The ordinary ADT-1 date is event-linked: appointment at a 30 September 2026 AGM generally means 15 October 2026.
- The company, not the auditor, is responsible for the section 139(1) notice.
- Check eligibility, rotation, tenure and consent before filing; electronic form acceptance is not substantive validation.
- The revised 2025 first-auditor category and the statutory filing obligation must be analysed separately.
Primary Sources and Further Reading
Related TaxGuru coverage: Text of MCA notification G.S.R. 359(E) dated 30 May 2025
Related TaxGuru coverage: Analysis of first-auditor ADT-1 statutory ambiguity
Related TaxGuru coverage: ADT-1 filing and auditor appointment overview
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Disclaimer: This publication provides general information on statutory auditor appointments and MCA filing practice as reviewed on 13 October 2026; it is not a substitute for legal, company secretarial, accounting or audit advice. The obligation and deadline depend on the actual appointment event, company classification, current rules, form instructions, exemptions and subsequent MCA notifications. The first-auditor filing question is expressly identified as an area requiring interpretation and current official clarification; no disputed position is represented as a final judicial or governmental determination. Companies should verify the live MCA portal and obtain appropriate professional advice. TaxGuru accepts no responsibility for additional fees, penalties, invalid appointments, audit consequences, loss or other effects arising from use of this material.
