Appointment of Auditor in Mumbai: First Auditor, AGM Appointment, ADT-1 Filing, and Rotation Compliance

Mumbai has the highest volume of auditor appointments – Powai startups appointing first auditors post-incorporation, BKC listed companies managing rotation, Fort family businesses reappointing at AGMs. The 2025 ADT-1 amendment (mandatory for first auditors from 14.07.2025) adds a critical new step for every newly incorporated Mumbai company. Learn more about Appointment of Auditor across India.

Patron Accounting's Mumbai office at Marine Lines – adjacent to ROC Everest House – provides end-to-end auditor appointment: CA identification, Board/AGM documentation, ADT-1 filing, rotation planning, casual vacancy handling, and integrated appointment-to-Statutory Audit continuity. For ongoing compliance, see Private Limited Company Compliance.

Content is reviewed quarterly for accuracy.

Newly incorporated company (First Auditor) – Board appoints within 30 days of incorporation. ADT-1 within 15 days (mandatory from 14.07.2025). Holds office till first AGM. For Powai/Andheri startups via SPICe+, this is the most time-sensitive post-incorporation step.

Annual reappointment at AGM – All Mumbai companies: Ordinary Resolution to appoint/reappoint for 5-year term. ADT-1 within 15 days. Part of annual AGM compliance cycle.

Auditor rotation for prescribed companies – Listed companies (BSE/NSE) and large companies (capital ≥ Rs 10 crore, borrowings ≥ Rs 50 crore). Individual max 5 years, firm max 10 years. 5-year cooling-off. BKC listed companies must plan proactively.

Casual vacancy – Resignation/disqualification/death mid-term. Board fills within 30 days. If resignation: Board recommends + members approve within 3 months. Common when auditors resign due to workload or conflict.

Change of auditor (voluntary) – Upgrading from sole practitioner to larger firm during growth phase. Existing auditor resigns (ADT-3) or not reappointed at AGM.

Converted entity – LLP to Pvt Ltd or OPC to Pvt Ltd – new entity must appoint statutory auditor under Section 139(6).

• Auditor's Written Consent: Letter confirming willingness to accept appointment as statutory auditor
• Section 141 Eligibility Certificate: Confirmation of eligibility and absence of disqualifications
• Board Resolution (First/Casual): Certified copy appointing the auditor
• AGM Resolution (Subsequent): Certified copy of Ordinary Resolution at AGM
• Audit Committee Recommendation: Written recommendation (if company has audit committee)
• Auditor Details: ICAI membership number, firm registration number, PAN, address, email
• Company CIN and DSC: For ADT-1 filing on MCA V3 portal
• Intimation Letter: Copy of letter communicating appointment to the auditor

All fees and charges listed are indicative only and do not constitute a binding offer. Final amounts may vary depending on the volume of work and the complexity involved.

Professional service charges for drafting, filing, and representation are separate from the statutory fees. The exact fee depends on the complexity of the case, disputed amount, and number of hearings required. Contact us for a detailed quote.

Get a free Appointment of Auditor consultation - Call +91 945 945 6700 or WhatsApp us. No-obligation assessment.

Trust Signals: 10,000+ Businesses | 4.9 Google Rating | 50,000+ Documents Filed | 15+ Years

“Patron appointed our first auditor within 10 days of incorporation, filed ADT-1, and seamlessly transitioned to the first statutory audit. Most startups in our co-working space missed the 30-day deadline.”

— Founder, D2C Startup, Powai

Offices in Pune, Mumbai, Delhi, and Gurugram serving companies with auditor appointment, statutory audit, and corporate compliance.

Explore related services:

• Appointment of Auditor (India Overview)
• Statutory Audit
• Private Limited Company Compliance
• Accounting Services
• Private Limited Company Registration
• Income Tax Return Filing
• ROC Notice
• GST Registration in Mumbai

• Section 139(6): First auditor – Board within 30 days; if Board fails, members at EGM within 90 days
• Section 139(1): Subsequent auditor – appointed at AGM for 5-year term (till 6th AGM)
• Section 139(2): Rotation – individual max 5 years, firm max 10 years, 5-year cooling-off
• Section 139(8): Casual vacancy – Board within 30 days; if resignation, members within 3 months
• Section 141: Eligibility and disqualifications – practicing CA, securities/debt/relationship limits
• Section 140: Removal (Special Resolution + NCLT) and resignation (ADT-3 within 30 days)
• Section 147: Penalties – company Rs 25,000-5,00,000; officers Rs 10,000-1,00,000
• Form ADT-1: Intimation to ROC within 15 days – mandatory for first auditor from 14.07.2025
• Form ADT-3: Statement of resignation reasons – filed within 30 days
• ROC Mumbai: Everest House, 100 Marine Lines, Mumbai 400020

Filing Portal: mca.gov.in (MCA V3 portal)

The first auditor must be appointed within 30 days of incorporation – missing this shifts power to members at EGM. ADT-1 must be filed within 15 days. Non-appointment cascades: no auditor → no audit → no AOC-4 → penalties + director disqualification. For Mumbai companies approaching AGM, auditor appointment is a mandatory agenda item.

Appoint your auditor today – Call +91 945 945 6700 or WhatsApp us.

Appointment of auditor in Mumbai spans the company's lifecycle – from first auditor within 30 days for Powai startups to annual AGM reappointment, from mandatory rotation for BKC listed companies to casual vacancy handling. The 2025 ADT-1 amendment adds a critical new step for every newly incorporated Mumbai company.

Patron Accounting's Mumbai office at Marine Lines – adjacent to ROC Everest House – provides end-to-end services: CA identification, Section 141 verification, Board/AGM documentation, ADT-1 filing, rotation planning, casual vacancy management, and integrated appointment-to-statutory-audit continuity.

With offices in Pune, Mumbai, Delhi, and Gurugram, 10,000+ businesses served, and 4.9 Google rating, Patron Accounting LLP delivers compliant auditor appointments across India.