The auditor rules look simple until an auditor resigns mid-term — then five separate procedures, four ADT forms and a 15-day clock all collide. Here's how each path actually works.
Two deadlines to burn into memory: first auditor within 30 days of incorporation; ADT-1 within 15 days of appointment.
A company is incorporated, the founders are heads-down on product, and the statutory auditor never gets appointed. Day 31 arrives and a compliance default is already live — the company can't complete its annual filing cycle without a valid auditor, and the penalty clock has started. None of this is hard; it's just easy to forget under launch pressure. And the 15-day ADT-1 window is the shortest deadline in the whole MCA calendar, so it's the one most often blown.
The auditor framework rewards companies that plan transitions and punishes those that improvise. The trick is knowing which of the five change-scenarios you're in.
BOTTOM LINE
- First auditor: Board appoints within 30 days of incorporation; holds office till the first AGM. ADT-1 is now mandatory for first auditors too (since 14 July 2025).
- Regular term: appointed at AGM for 5 years; ADT-1 within 15 days.
- Rotation (listed/large companies): individual 1 term (5 yrs), firm 2 terms (10 yrs), then a 5-year cooling-off.
- Removal before term: needs a special resolution and Central Government approval via ADT-2.
Appointing the first auditor, and the 15-day ADT-1 clock
Governs this section: Section 139(6) & Rule 4, Companies (Audit and Auditors) Rules, 2014
Every company's board must appoint its first statutory auditor within 30 days of incorporation. If the board fails, the members do it at an EGM within 90 days. The first auditor holds office until the conclusion of the first AGM.
Two things changed worth flagging. Since 14 July 2025, ADT-1 is mandatory even for the first auditor — it used to be skipped. And ADT-1 must be filed within 15 days of the appointment, not 30. That 15-day window, running from the appointment date (not the AGM date), is the single most-missed deadline here. Before the board resolution, collect the auditor's written consent and eligibility certificate under Section 141 — they're preconditions, not afterthoughts.
The 5-year term — and why ratification is gone
Governs this section: Section 139(1)
At the first AGM, members appoint an auditor for five consecutive years (until the conclusion of the sixth AGM), by ordinary resolution.
PRACTITIONER'S NOTE
Older guides still say the appointment must be "ratified" at each AGM. That requirement was removed by the Companies (Amendment) Act, 2017 — there's no annual ratification anymore. If your AGM agenda still carries a ratification item, it's a leftover. The auditor simply continues through the five-year term unless removed or disqualified.
When does mandatory rotation apply?
Governs this section: Section 139(2) & Rule 5
Rotation isn't universal — it applies to a defined class: listed companies; unlisted public companies with paid-up capital ≥ ₹10 crore; private companies with paid-up capital ≥ ₹50 crore; and any company (other than OPCs and small companies) with public borrowings or deposits ≥ ₹50 crore.
For those companies:
| Auditor type | Maximum tenure | Then |
|---|---|---|
| Individual | 1 term — 5 years | 5-year cooling-off |
| Audit firm | 2 terms — 10 years | 5-year cooling-off |
During cooling-off, the outgoing auditor can't be reappointed and the incoming firm mustn't share common partners with the outgoing one. Most private limited companies are exempt from rotation — but they should still confirm they don't trip the ₹50 crore or borrowings tests.
Casual vacancy: resignation vs death/disqualification
Governs this section: Section 139(8) & Section 140(2)
A mid-term vacancy is filled by the board within 30 days — but the route forks:
- Resignation: the outgoing auditor must file ADT-3 within 30 days, stating reasons. The board's replacement also needs member approval at a general meeting within 3 months.
- Death or disqualification: the board fills it within 30 days; no separate member-approval-within-3-months step.
Either way, the casual-vacancy auditor holds office only until the next AGM, where a fresh five-year appointment is made.
Removing an auditor before term ends
Governs this section: Section 140(1) & Rule 7
This is the heaviest path, and it's deliberately hard — you can't simply fire an auditor mid-term. Removal requires: a board resolution; an application to the Central Government (Regional Director) in Form ADT-2 within 30 days; and, after approval, a special resolution of members within 60 days. The auditor must be given a reasonable opportunity to be heard.
PENALTY / CAUTION
Don't confuse removal with non-reappointment. Choosing a different auditor at the AGM (with special notice) is an ordinary, low-friction process. Removing one before term end needs government approval. Mislabel one as the other and the appointment can be challenged.
What does non-compliance cost?
Governs this section: Section 147
PENALTY — Section 147
For default in the appointment provisions, the company is liable to a fine of ₹25,000 to ₹5 lakh, and every officer in default can face imprisonment up to 1 year and/or a fine of ₹10,000 to ₹1 lakh. Late ADT-1 carries a per-day additional fee on top. And without a valid auditor, your entire annual filing cycle is blocked — with strike-off risk if it persists.
Common mistakes
- Missing the 15-day ADT-1 window. It's shorter than almost every other MCA deadline and runs from the appointment date, not the AGM.
- Forgetting ADT-1 for the first auditor. Mandatory since 14 July 2025.
- Still ratifying annually. Ratification was abolished in 2017.
- Confusing removal with non-reappointment. Only removal needs Central Government approval (ADT-2).
- No succession plan for rotation. Companies hitting the 5/10-year wall without a plan scramble — and the cooling-off rules limit who they can pick.
Checklist
- New company: appoint the first auditor within 30 days; file ADT-1 within 15.
- Collect written consent + Section 141 eligibility certificate before the board meeting.
- At AGM, appoint for 5 years by ordinary resolution; file ADT-1 within 15 days.
- If rotation applies, track the 5/10-year tenure and plan the cooling-off succession.
- On resignation, ensure ADT-3 (auditor) and the casual-vacancy filling within 30 days.
- For removal, follow ADT-2 + Central Government approval + special resolution — in that order.
FAQ
When is ADT-1 due? Within 15 days of the auditor's appointment (or reappointment) — from the appointment date, not the AGM date. It's now required for first auditors too.
Does auditor rotation apply to private companies? Only if paid-up capital is ≥ ₹50 crore, or public borrowings/deposits are ≥ ₹50 crore. Most small private companies are exempt.
Can we just remove our auditor at the AGM? Removal before term-end needs a special resolution and Central Government approval (ADT-2). Simply not reappointing at the AGM is a different, lighter process.
What happens when an auditor resigns? They file ADT-3 within 30 days; the board fills the casual vacancy within 30 days, with member approval within 3 months.
Is ratification still required every year? No. The Companies (Amendment) Act, 2017 removed the annual ratification requirement.
Primary sources
- Sections 139, 140, 141, 142 & 147, Companies Act, 2013
- Companies (Audit and Auditors) Rules, 2014 (as amended in 2025)
- Forms ADT-1, ADT-2, ADT-3; Section 196/MGT-14 where applicable
Disclaimer: This article is general information on a fast-changing area of company law, current at the time of writing. It is not legal or professional advice for any specific company. Verify the position against the live MCA rules and consult your company secretary or auditor before filing.