Specialist Advisor

Specialist Advisor

Corporate & Compliance Consultant

Published on: Sep 22, 2026

Understanding ADT-1 Filing: A Comprehensive Guide

Maintaining your company's regulatory health and being audit-ready are crucial for business success. The ADT-1 filing process is an essential part of complying with the Companies Act 2013. This comprehensive guide will help ensure your company remains compliant and audit-prepared.

What is the ADT 1 Form?

Form ADT-1 is a statutory return filed by companies with the Registrar of Companies (ROC) to report the appointment of an auditor under Section 139 of the Companies Act, 2013. This form is necessary for notifying the ROC about the appointment of your company's first auditor post-incorporation or during the Annual General Meeting (AGM) for auditor appointments and reappointments. For more detailed insights, you can refer to the Comprehensive ADT-1 Filing Guide.

According to the latest Companies (Audit and Auditors) Amendment Rules, 2025, effective from July 14, 2025, filing Form ADT-1 is mandatory for all first auditor appointments, including those by the Board of Directors. This change signifies a shift from previous exemptions. The form must be filed within 15 days of the auditor’s appointment and include details such as the auditor’s name, address, PAN, membership number, and term of appointment.

Requirements for Filing ADT-1 Form

Filing the ADT-1 Form is obligatory for all companies, whether public, private, listed, unlisted, or one-person companies (OPCs), when appointing an auditor for the first time or during subsequent Annual General Meetings (AGMs). The form must be submitted to the ROC within 15 days from the auditor’s appointment.

To file the form, ensure the following conditions are met:

  • The auditor’s appointment complies with the Companies Act, 2013 provisions.
  • The appointed auditor has provided written consent to serve as the company’s auditor.

The auditor must also submit a certificate under Section 141 of the Act, confirming that:

  • They are eligible for appointment as an auditor.
  • They are not disqualified or ineligible under the Companies Act.
  • The appointment respects the legally prescribed audit limits.

To explore the filing process and requirements further, see the ADT-1 Filing Process: Step-by-Step Guide.

Who Needs to File Form ADT-1?

The responsibility for filing the ADT-1 Form lies with the company, not the auditor. Every company that appoints or reappoints an auditor must ensure Form ADT-1 is filed with the ROC within the prescribed timeline.

Entities Required to File ADT-1 Include:

All Types of Companies:

  • Listed Companies
  • Unlisted Companies
  • Public Limited Companies
  • Private Limited Companies
  • One-Person Companies (OPCs) and other registered entities

Newly Incorporated Companies:

Newly incorporated companies must file Form ADT-1 after appointing their first auditor, regardless of whether the appointment is made by the Board of Directors or the members. For understanding ADT-1 filing in context with company changes, visit Understanding ADT-1 Filing for Company Changes.

Companies Filling a Casual Vacancy:

If an auditor is appointed to fill a casual vacancy (arising from resignation, death, disqualification, etc.), the company must file Form ADT-1 to report the new appointment.

Companies Appointing or Reappointing Auditors at AGM:

Any company appointing or reappointing an auditor at its AGM must file Form ADT-1 within 15 days of passing the appointment resolution. For simplified compliance details, visit Comprehensive Guide to ADT-1 Filing 2023.

Note: Filing Form ADT-1 is mandatory in all of the above scenarios, including appointments made to fill casual vacancies.Conclusion: Ensuring Compliance with ADT-1 Filing

Having navigated through the essentials of ADT-1 filing, it is evident that this process is more than a legal formality; it's crucial to maintaining your company's credibility and statutory adherence. By ensuring accurate and timely ADT-1 submissions, you'll facilitate smooth audit processes and enhance your business’s integrity. Persistently aligning with regulations will become a rewarding endeavor. Keep updated with regulatory changes and leverage the resources at the ADT-1 Filing Enhancements page to advocate for compliance excellence. For further understanding of the ADT-1 processes, explore Understanding ADT-1 Filing Process Made Easy.