ADT-1 for the First Auditor: Mandatory in Practice, Not Yet in Law

For every newly incorporated company, one compliance question has refused to settle: must you file Form ADT-1 when the Board appoints the first auditor? A 2025 form change led many professionals to treat it as mandatory — yet the rule that actually triggers ADT-1 was never amended, and in April 2026, the ICSI formally asked the MCA to clarify. This article separates what the law requires from what the MCA portal now expects and tells you exactly what to do today to stay clean.

Is ADT-1 mandatory for first auditors?

The honest answer has two halves. As a matter of strict law, filing Form ADT-1 is not expressly mandated for a first auditor appointed by the Board: the filing duty in Rule 4(2) of the Companies (Audit and Auditors) Rules, 2014 flows from the fourth proviso to Section 139(1), appointment by members, and not from Section 139(6), which governs the first auditor. As a matter of practice, you should still file it, as the revised 2025 form and the MCA portal’s validations now require it.

What Section 139(6) requires

The foundation for everything here is the appointment timeline, not the filing form. Section 139(6) of the Companies Act, 2013 makes the Board responsible for appointing the first auditor of a company (other than a Government company) within 30 days from the date of company registration. If the Board does not appoint the first auditor within the due date, the members must step in. The auditor appointed at this stage is short-term by design: the first auditor holds office only until the conclusion of the company’s first Annual General Meeting, after which a five-year appointment is made under Section 139(1).

What G.S.R. 359(E) changed

The 2025 amendment is real, but it is narrower than the headlines suggest. Through Notification G.S.R. 359(E) dated 30 May 2025, the MCA notified the Companies (Audit and Auditors) Amendment Rules, 2025, effective 14 July 2025. The amendment did two operative things: it amended Rule 13(2) to require electronic reporting of fraud in Form ADT-4, and it substituted all four forms: ADT-1, ADT-2, ADT-3 and ADT-4, in the Annexure to the 2014 Rules. The substituted Form ADT-1 introduced a “Nature of Appointment” field that, for the first time, lets a company report a first-auditor appointment.

New ADT-1 Form

What the notification did not do is amend Rule 4(2) — the rule that actually creates the ADT-1 filing obligation. The change lives in the Annexure (the form) and in Rule 13 (fraud reporting), not in the operative filing trigger. The revised Form ADT-1 now asks the filer to select the nature of the appointment from options including:

• First auditor by the Board of Directors / Members / C&AG;
• Appointment of an auditor at an AGM, and re-appointment at an AGM;
• Appointment or re-appointment by the C&AG;
• Auditor appointed to fill a casual vacancy.

Law versus form: the distinction

This is where the post you may have read elsewhere overstates the position. A form is an instrument prescribed under the rule-making power; it records a duty; it does not create one. The Companies (Audit and Auditors) Amendment Rules, 2025 were made in exercise of the powers under Section 139 and allied sections read with Section 469 of the Companies Act, 2013 — but they substituted forms and amended Rule 13. The filing trigger in Rule 4(2) is unchanged, and it reads, in substance, that the notice of appointment under the “fourth proviso to sub-section (1) of Section 139 shall be filed in Form ADT-1.”

Because Rule 4(2) points only to Section 139(1), the addition of a first-auditor option in the form did not, by itself, convert a silent statute into a mandate. The table below shows what genuinely moved on 14 July 2025 — and what did not.

Note: the “After” column captures a form and system expectation, not an amendment to the filing rule. That gap is precisely what the ICSI has asked the MCA to resolve.

The ICSI representation, 2026

The debate is no longer just professional chatter — it is now formally before the regulator. On 16 April 2026, the ICSI submitted a representation (Ref G&CL: MCA: APR:03/2026) to the Secretary, Ministry of Corporate Affairs. The Institute records the settled understanding that, because the ADT-1 duty emanates from the fourth proviso to Section 139(1) read with Rule 4(2), no filing requirement is prescribed for a first auditor under Section 139(6) — and that imposing a substantive compliance duty through the design of an electronic form, without an enabling provision, creates avoidable hardship.

The representation asks the MCA to clarify, by circular or by amending the Rules/forms, three specific questions:

• Whether filing Form ADT-1 is mandatory for the appointment of the first auditor under Section 139(6);
• Whether it is mandatory for an auditor appointed to a casual vacancy under Section 139(8);
• Whether the AOC-4 system validations can be aligned with the statutory position, so companies are not compelled to file where the law does not require it.

As of the date of this update, the MCA has not issued a clarification or circular in response. The position is therefore best treated as unsettled in law and pending before the Ministry, which is exactly why a cautious, file-anyway approach is sensible.

Why does AOC-4 make you file it?

Here is the practical engine that turns a silent rule into a real obligation. When you file Form AOC-4 with the company’s financial statements, the form seeks the auditor’s particulars and validates the ADT-1 SRN. Under the older V2 regime, where ADT-1 was not required for a board-appointed first auditor, a placeholder SRN such as Z99999999 was tolerated. ICSI’s own representation records that, post-amendment, AOC-4 validations now create system-based constraints that effectively compel ADT-1 filing — even where the substantive law does not mandate it.

⚠️ The practical takeaway: the strongest reason to file ADT-1 for your first auditor is not a Section 147 prosecution — it is that you will need a valid ADT-1 SRN to complete your annual ROC filings (AOC-4 and MGT-7) later in the year. File the ADT-1 within 15 days of the board meeting, hold the SRN, and you remove the friction before it appears.

Deadline and late fees 📅

Once the appointment is made, the clock that matters runs from the board meeting. The accepted filing window for Form ADT-1 is 15 days from the date of the auditor’s appointment (the board resolution date) — not from the date of incorporation. Because the Board has 30 days from incorporation to appoint, and ADT-1 follows within 15 days, the effective outer limit is 45 days from incorporation. Holding the board meeting early in the 30-day window simply gives you a longer, calmer filing runway.

A worked example makes the timeline concrete:

If ADT-1 is filed late, additional fees apply under the Companies (Registration Offices and Fees) Rules, 2014, on a delay-slab multiplier:

Penalty under Section 147 📉

Beyond late fees, the Act carries a general penalty for auditor-appointment defaults — but read it in proportion. Under Section 147(1) of the Companies Act, 2013, if any provision of Sections 139 to 146 is contravened, the company is liable to a fine between ₹25,000 and ₹5 lakh, and every officer in default is liable to a fine between ₹10,000 and ₹1 lakh. Imprisonment for officers under this sub-section was removed by the Companies (Amendment) Act, 2020, so the exposure here is monetary.

In practice, Section 147 is aimed at a genuine failure to appoint or to comply with Section 139 — not at the narrow, contested question of whether a board-appointed first auditor’s ADT-1 was strictly required. For a new company that has appointed its auditor on time, the realistic risk of skipping ADT-1 is the AOC-4 SRN block described above, not a 147 penalty. The sensible reading is to appoint correctly, file ADT-1 to keep the record and the SRN clean, and treat the penalty section as the backstop it is.

Frequently Asked Questions

Disclaimer: This article is for general information and reflects the position as of 29 June 2026. It is not legal advice. Where ADT-1’s applicability to a Board-appointed first auditor affects a filing decision, confirm the current MCA position and consult a qualified professional.

Conclusion

The 2025 amendment did not resolve the long-running question of ADT-1 for the first auditor — it sharpened it. Rule 4(2) still ties the filing duty to Section 139(1), the revised Form ADT-1 now carries a first-auditor option, and the ICSI has formally asked the MCA to reconcile the two. Until the Ministry clarifies, the cleanest reading is this: ADT-1 is not strictly mandated by law for a Board-appointed first auditor, but it is the safe, practical filing that keeps your records and your AOC-4 unblocked.

So act on the timeline, not the debate. Appoint your first auditor within 30 days of incorporation, file Form ADT-1 within the next 15 days to hold a valid SRN, and watch for an MCA circular that may settle the question. If you would like our process experts to handle the appointment and the filing end-to-end, explore our first auditor appointment service and start compliant from Day 1.

Author Bio

Editorial Team

Setindiabiz Editorial Team is a multidisciplinary collective of Chartered Accountants, Company Secretaries, and Advocates offering authoritative insights on India’s regulatory and business landscape. With decades of experience in compliance, taxation, and advisory, they empower entrepreneurs and enterprises to make informed decisions.