Every deadline, on one page
| Event | Who acts | Time limit | Filing | If missed |
|---|---|---|---|---|
| First auditor — appointment | Board of Directors | 30 days from incorporation | ADT-1 within 15 days of the board meeting | Members must appoint at an EGM within 90 days |
| First auditor — government company | CAG of India | 60 days from registration | — | Board within next 30 days; failing that, members within 60 days |
| Subsequent auditor — appointment / reappointment | Members at the AGM | At the AGM, for 5 years | ADT-1 within 15 days of the AGM | Additional fees escalate up to 12×; Section 450 exposure |
| Casual vacancy | Board | 30 days; members approve within 3 months if from resignation | Fresh ADT-1 within 15 days | Company left without a validly appointed auditor |
| Auditor's resignation | The auditor | ADT-3 within 30 days of resignation | Form ADT-3 | Fine on the auditor starting at ₹50,000 |
| Removal before term | Company | ADT-2 to Central Government within 30 days of board resolution | Form ADT-2, then special resolution within 60 days of approval | Removal is invalid — the auditor remains in office |
Introduction
Appointing an auditor is a decision. Filing Form ADT-1 within fifteen days is what makes that decision exist in law. The appointment happens in a boardroom or an AGM; until the ADT-1 reaches the Registrar of Companies, the MCA's records do not know your auditor exists.
The window is short, and the government fee is small — between ₹200 and ₹600. Precisely because the stakes look trivial, the form gets left to "next week". Next week becomes next quarter, the additional fee multiplies to twelve times, and a filing that would have cost a few hundred rupees becomes a compliance defect flagged in every due diligence the company ever faces. Under Section 450, the exposure runs beyond fees — a penalty of ₹10,000 on the company and every officer in default, with ₹1,000 for each day the contravention continues.
The deadline also lands at the worst possible time. Most companies hold the AGM at the end of September; the fifteen days therefore expire in mid-October, in the thick of annual-filing season, when the same team is preparing AOC-4 and MGT-7. The auditor's details flow into those annual filings — which is exactly why a missing or late ADT-1 does not stay a small defect.
This guide covers the whole cycle for companies and their advisers: who must file and who is exempt, first auditors under Section 139(6), the five-year AGM appointment, what ADT-1 must contain and how it is filed on the MCA V3 portal, the fee and late-fee arithmetic, mandatory rotation under Section 139(2), government companies, casual vacancies, resignation (ADT-3), early removal (ADT-2), and the penalties on both sides of the table. For the parallel discipline on the brand side, see our guide to trademark opposition in India — every deadline, on one page: different statute, same lesson, that compliance fails on dates before it fails on merits.
1. Appointment and intimation are different things
The most common confusion. The appointment is a corporate act — a board resolution or an AGM resolution under Section 139. The intimation is a statutory filing — Form ADT-1 under Rule 4 of the Companies (Audit and Auditors) Rules, 2014. Both must happen, on two different clocks, and completing the first without the second is the single most common ADT-1 failure.
1.1 Who must file — and who is outside the net
| Entity | Must appoint a statutory auditor & file ADT-1? |
|---|---|
| Private limited company | Yes — regardless of turnover or size |
| Public limited company (listed or unlisted) | Yes |
| One Person Company (OPC) | Yes — though exempt from auditor rotation |
| Small company | Yes — though exempt from rotation |
| Section 8 (not-for-profit) company | Yes |
| Government company | Yes — but the CAG appoints; see §3.2 |
| Limited Liability Partnership (LLP) | No — LLP audit is governed by the LLP Act, 2008, not Section 139 |
There is no turnover threshold and no exemption for dormancy in the ordinary course: a company with zero revenue still needs an auditor and still files ADT-1 at every appointment event.
2. First auditor and subsequent auditor take different routes
Same form at the end, different powers at the start. The first appointment is an operational necessity vested in the Board; every appointment after that is a governance decision belonging to the members.
First auditor
An operational necessity
Subsequent auditor
A governance decision
3. The statutory framework
Auditor appointment lives in Sections 139 to 141 of the Companies Act, 2013, read with the Companies (Audit and Auditors) Rules, 2014. Seven provisions do almost all of the work.
3.2 Government companies — a different appointing authority
In a government company — or a company owned or controlled by the Central or a State Government — the auditor is appointed by the Comptroller & Auditor-General of India. The first auditor must be appointed by the CAG within sixty days of registration; if the CAG does not, the Board has thirty days; if the Board does not, the members must appoint within sixty days at an EGM. Subsequent auditors are appointed by the CAG within 180 days of the start of the financial year. Groups acquiring or partnering with public-sector entities regularly miss that the ordinary Section 139(1) route simply does not apply.
4. The fifteen-day window: filing Form ADT-1
Form ADT-1 must reach the ROC within fifteen days of the meeting at which the auditor was appointed — the board meeting for a first auditor or a casual vacancy, the AGM for a five-year appointment or reappointment.
A worked example. A private company closes its financial year on 31 March 2026 and holds its AGM on 30 September 2026 — the last permissible date. The auditor is reappointed at that AGM. Form ADT-1 is due on or before 15 October 2026. Filed on 16 October, it is late, and the additional-fee clock has already started.
4.1 How the filing actually happens — MCA V3
ADT-1 is now a web-based form on the MCA V3 portal, filed against the company's CIN. The sequence in practice: log in through the company's or the professional's V3 account; open the ADT-1 web form; the company's master data auto-populates; enter the auditor's details — name, address, PAN, membership number or firm registration number, category, and the period of accounts covered; attach the documents listed below; affix the digital signature (DSC) of a director or authorised signatory; pay the fee online. The form is processed and a Service Request Number (SRN) with an acknowledgement issues to the registered email.
Keep the SRN. It is the proof of filing, it is quoted in later filings and corrections, and it is the first thing a due-diligence team asks for.
4.2 What to attach
- Certified copy of the board or AGM resolution appointing the auditor
- The auditor's written consent to the appointment
- The auditor's certificate of eligibility under Section 141 — confirming no disqualification and that the appointment is within prescribed limits
- The company's intimation letter to the auditor
4.3 Who files, and for which events
The obligation is the company's, not the auditor's — and it arises at every appointment event: first auditor, five-year appointment, reappointment after a completed term, and every casual-vacancy appointment. Each event needs its own ADT-1; a fresh appointment is never covered by an old filing.
5. Eligibility: who can — and cannot — be your auditor
Only a chartered accountant in practice may be appointed, and where a firm is appointed, only partners who are chartered accountants may act and sign. Section 141(3) then lists who is disqualified — and an appointment made in breach is void, taking the audit down with it.
5.1 The Section 141(3) disqualifications
- A body corporate, other than an LLP registered under the LLP Act, 2008
- An officer or employee of the company, or a partner or employee of such officer or employee
- A person who — himself, or through a relative or partner — holds any security or interest in the company or its holding, subsidiary or associate (a relative may hold securities up to ₹1 lakh face value)
- A person indebted to the company or its group beyond ₹5 lakh, or who has given a guarantee for another's debt to the group beyond ₹1 lakh
- A person or firm with a business relationship with the company or its group, of the prescribed disqualifying kind
- A person whose relative is a director or key managerial personnel of the company
- A person in full-time employment elsewhere, or holding appointment as auditor of more than twenty companies
- A person convicted of an offence involving fraud, within ten years of the conviction
- A person or firm rendering the Section 144 prohibited services — such as internal audit, investment banking or management services — to the company
6. Fees — and how ₹300 becomes ₹3,600
The normal fee is set by the company's nominal share capital. The additional fee for delay is set by arithmetic nobody can negotiate with — the portal computes it.
A ₹300 filing left for seven months costs ₹3,600 in additional fees — twelve times the fee that fifteen minutes of timely filing would have settled.
6.1 Beyond the fee — Section 450 and the diligence file
Where the contravention is pressed, Section 450 — the general penalty provision — exposes the company and every officer in default to a penalty of ₹10,000, with a further ₹1,000 for each day the contravention continues, capped at ₹2 lakh for the company and ₹50,000 for an officer. And independently of penalties: the ROC record shows no validly intimated auditor for the period, the annual filings that carry the auditor's details rest on a defective foundation, and the gap is listed as a compliance defect — usually with a specific warranty demanded — in every funding or acquisition diligence the company faces.
7. Rotation: can you simply reappoint?
For most private companies, a well-performing auditor can be reappointed for a further five-year term at the AGM. For companies covered by Section 139(2) read with Rule 5, rotation is mandatory — and the applicability test should be run every year before the AGM notice goes out, because a borrowing or a capital raise can pull a company across a threshold mid-term.
7.1 Who must rotate
- All listed companies
- Unlisted public companies with paid-up share capital of ₹10 crore or more
- Private companies with paid-up share capital of ₹50 crore or more
- Any company below those thresholds with public borrowings or public deposits of ₹50 crore or more
One Person Companies and small companies are excluded — rotation never applies to them.
Rotation applies — the ceiling
- Individual auditor: one term of 5 consecutive years, maximum Then out — no second term
- Audit firm: two terms of 5 consecutive years — ten years in all Then out
- Counting: tenure served before the 2013 Act commenced counts toward the limits
After the ceiling — the cooling-off
- Five years during which the outgoing auditor cannot be reappointed ✕ No early return
- Network bar: the incoming auditor must not be in the same network as, or associated with, the outgoing one ✕ Same-network successor invalid
- Re-run the applicability test annually — thresholds are crossed quietly, by growth
8. Casual vacancy: the thirty-day scramble
When an auditor dies, resigns, or becomes disqualified mid-term, Section 139(8) applies. The Board fills the vacancy within thirty days. If the vacancy arose from resignation, the Board's appointment must also be approved by the members within three months of the recommendation. The casual-vacancy auditor holds office only until the next AGM — where a fresh five-year appointment is made, with a fresh ADT-1. Two filings, not one, and companies routinely miss the second.
9. Resignation, removal, and the three ADT forms
Three forms cover the appointment's life-cycle, and they are routinely confused.
9.1 Removal before term — deliberately difficult
Under Section 140(1), removal before the term expires requires: a board resolution; an application to the Central Government on Form ADT-2 within thirty days of that resolution; and — after approval — a special resolution of the members within sixty days. The auditor must be given an opportunity to be heard. Skipping any step makes the removal invalid, and the sequence exists precisely so that an auditor asking uncomfortable questions cannot simply be dropped.
9.2 Resignation — the auditor's own clock
A resigning auditor files Form ADT-3 with the company and the ROC within thirty days, stating the reasons and relevant facts. The duty is the auditor's, and the fine for default — starting at ₹50,000 — falls on the auditor personally. For the company, the resignation triggers the casual-vacancy machinery of Section 139(8).
10. Two situations, worked through
Scenario A — The ADT-1 that waited for "next week"
A private company holds its AGM on 30 September and reappoints its auditor for five years. The resolution is passed, minutes are signed, everyone moves on. The checklist says ADT-1 by 15 October.
October belongs to the annual accounts. The form is finally filed in late March — 160 days late.
What it cost. The ₹300 normal fee became ₹300 plus ₹3,000 in additional fees at the 10× slab. Worse: the company raised funding the following year, and the investor's diligence report listed the late ADT-1 as a compliance defect requiring a specific warranty from the founders.
What would have prevented it. Filing in the same week as the AGM, while the resolution, consent and eligibility certificate were already on the table.
Scenario B — The resignation nobody papered
An auditor resigns mid-term after a disagreement over a related-party disclosure. The company quickly gets a friendly firm to "take over" and continues as if nothing happened.
What went wrong. The outgoing auditor never filed ADT-3 — drawing personal fine exposure from ₹50,000. The Board never passed a casual-vacancy resolution within thirty days, the members never approved within three months, and no fresh ADT-1 was filed. On the ROC record, the old auditor was still in office while a stranger signed the audit report.
The repair. Reconstructing the sequence months later — resolutions, approvals, late filings at maximum additional fees — cost multiples of contemporaneous compliance. And the disclosure dispute that caused the resignation surfaced anyway, in the ADT-3 reasons.
11. Twelve mistakes
- Treating the AGM resolution as the end of the job — the ADT-1 is what records it.
- Diarising the AGM but not the fifteen-day filing clock that starts at it.
- Obtaining consent and the Section 141 certificate after the resolution instead of before it.
- Assuming the first auditor needs no ADT-1 — file within fifteen days of the board meeting and keep the record clean.
- Reusing an old ADT-1 for a new appointment event — every appointment needs its own filing.
- Missing that a mid-term borrowing or capital raise has pulled the company into Section 139(2) rotation.
- Appointing an auditor already at the twenty-company ceiling, or otherwise disqualified under Section 141(3).
- Letting a casual-vacancy auditor run past the next AGM without a fresh five-year appointment and ADT-1.
- Applying the ordinary Section 139(1) route to a government company — the CAG appoints.
- Removing an auditor by simply "not continuing" them — early removal needs ADT-2 and Central Government approval.
- The resigning auditor skipping ADT-3 — the ₹50,000-plus fine is personal.
- Losing the SRN — it is the proof of filing every later process will ask for.
12. Checklist
At incorporation
- Board meeting to appoint the first auditor held within 30 days
- Consent and Section 141 certificate dated on or before the resolution
- ADT-1 filed within 15 days of the board meeting; SRN saved
- If the Board missed 30 days — members' EGM convened within 90 days
At every AGM appointment
- Section 139(2) rotation test run before the AGM notice
- Consent + eligibility certificate obtained before the resolution, checking the twenty-company limit
- ADT-1 filed within 15 days with resolution, consent, certificate and intimation letter
- SRN recorded in the secretarial file
On any mid-term change
- Casual vacancy — Board resolution within 30 days; members within 3 months if from resignation
- Fresh ADT-1 within 15 days of the appointment — and again at the next AGM
- Resigning auditor's ADT-3 filed within 30 days
- Early removal — ADT-2 within 30 days, special resolution within 60 days of approval
13. Frequently asked questions
Q1. What is Form ADT-1?
The statutory e-form by which a company intimates the Registrar of Companies of the appointment of its statutory auditor, under Section 139 of the Companies Act, 2013 read with Rule 4 of the Companies (Audit and Auditors) Rules, 2014.
Q2. What is the due date for filing ADT-1?
Within fifteen days of the meeting at which the auditor was appointed — the AGM for a five-year appointment or reappointment, the board meeting for a first auditor or a casual-vacancy appointment. AGM on 30 September means ADT-1 by 15 October.
Q3. Who is responsible for filing ADT-1 — the company or the auditor?
The company. The auditor's own filing duty arises only on resignation, when Form ADT-3 must be filed within thirty days.
Q4. Which companies must file ADT-1?
Every company registered under the Companies Act, 2013 — private, public, OPC, small, Section 8 — at every appointment event. LLPs are outside the net; their audit is governed by the LLP Act, 2008.
Q5. Who appoints the first auditor?
The Board of Directors, within thirty days of incorporation, under Section 139(6). If the Board fails, the members appoint at an EGM within ninety days. The first auditor holds office until the conclusion of the first AGM.
Q6. Is ADT-1 required for the first auditor?
File it within fifteen days of the board meeting. Whatever the historical debate about Rule 4's wording, current practice and the MCA system expect the filing — and a clean ROC record of every appointment is worth far more than the fee saved.
Q7. Who appoints the auditor of a government company?
The Comptroller & Auditor-General of India — the first auditor within sixty days of registration, failing which the Board within thirty days, failing which the members within sixty days. Subsequent auditors are appointed by the CAG within 180 days of the start of the financial year.
Q8. How long does an auditor hold office?
Five years — from the AGM of appointment until the conclusion of the sixth AGM. The earlier requirement of ratification at every AGM was omitted by the Companies (Amendment) Act, 2017.
Q9. What are the ADT-1 filing fees?
Based on nominal share capital: ₹200 (below ₹1 lakh), ₹300 (₹1–5 lakh), ₹400 (₹5–25 lakh), ₹500 (₹25 lakh–₹1 crore) and ₹600 (₹1 crore and above).
Q10. What is the penalty for late filing of ADT-1?
Additional fees as multiples of the normal fee: 2× up to 30 days late, 4× for 30–60 days, 6× for 60–90 days, 10× for 90–180 days, and 12× beyond 180 days — plus, where pressed, Section 450 penalties on the company and officers.
Q11. What does Section 450 add?
The general penalty: ₹10,000 on the company and every officer in default, with a further ₹1,000 per day of continuing contravention, capped at ₹2 lakh for the company and ₹50,000 for an officer.
Q12. Is there a condonation process for a late ADT-1?
None is needed — the additional-fee route remains open, so a late ADT-1 is filed with the escalated fee. What cannot be bought back is the clean record: the delay stays visible.
Q13. What documents are attached to ADT-1?
The certified board or AGM resolution, the auditor's written consent, the auditor's certificate of eligibility under Section 141, and the company's intimation letter to the auditor.
Q14. How is ADT-1 filed?
As a web-based form on the MCA V3 portal, against the company's CIN — details entered, attachments uploaded, a director's DSC affixed, fee paid online. The SRN and acknowledgement issue to the registered email.
Q15. What is an SRN and why does it matter?
The Service Request Number generated on successful filing — the proof of submission, quoted in later filings and corrections, and the first thing a diligence team asks for.
Q16. Who is qualified to be appointed as auditor?
Only a chartered accountant in practice; for a firm, only partners who are chartered accountants may act and sign. Section 141(3) then disqualifies officers and employees of the company, persons holding securities in or indebted to the group beyond limits, persons with prescribed business relationships, and more.
Q17. What is the twenty-company limit?
A person may not hold appointment as auditor of more than twenty companies. The eligibility certificate should specifically confirm the proposed appointment is within the ceiling — an appointment beyond it is void.
Q18. Which companies must rotate their auditor?
Under Section 139(2) read with Rule 5: listed companies; unlisted public companies with paid-up capital of ₹10 crore or more; private companies with paid-up capital of ₹50 crore or more; and companies below those thresholds with public borrowings or deposits of ₹50 crore or more. OPCs and small companies are excluded.
Q19. What are the rotation limits and the cooling-off?
An individual: one term of five consecutive years. A firm: two terms of five consecutive years. Then a five-year cooling-off, during which the outgoing auditor cannot return and the incoming auditor must not be in the same network. Pre-2013-Act tenure counts.
Q20. Can a private company reappoint the same auditor after five years?
Yes, if rotation does not apply to it — with fresh consent, a fresh eligibility certificate, a fresh resolution, and a fresh ADT-1 within fifteen days.
Q21. What is a casual vacancy and how is it filled?
A mid-term vacancy — death, resignation, disqualification. The Board fills it within thirty days; where it arose from resignation, the members approve within three months. The appointee serves until the next AGM.
Q22. Does a casual-vacancy appointment need its own ADT-1?
Yes — within fifteen days of the appointment. And the fresh five-year appointment at the next AGM needs another one. Two filings, not one.
Q23. What is Form ADT-3?
The statement a resigning auditor files with the company and the ROC within thirty days of resignation under Section 140(2), stating the reasons. Default draws a fine on the auditor starting at ₹50,000.
Q24. What is Form ADT-2?
The application to the Central Government for approval to remove an auditor before the term expires, filed within thirty days of the board resolution. After approval, the members pass a special resolution within sixty days, and the auditor is given an opportunity to be heard.
Q25. Can a company simply stop continuing an auditor mid-term?
No. Removal before term without the Section 140(1) sequence is invalid, and the auditor remains in office. The difficulty is deliberate — it protects auditor independence.
Q26. What happens if ADT-1 is never filed?
Beyond escalating additional fees: the ROC record shows no validly intimated auditor, annual filings rest on a defective foundation, the company and officers face Section 450 exposure, and the gap surfaces — usually with a specific warranty demanded — in every due diligence.
Q27. Can the auditor start work before ADT-1 is filed?
The appointment takes effect from the resolution, but until the ADT-1 is filed it is not on the public record — and a company that lets the audit run on an unfiled appointment is building its accounts on a compliance defect. File first.
Q28. Is annual ratification still required?
No. The ratification requirement in the first proviso to Section 139(1) was omitted by the Companies (Amendment) Act, 2017. A five-year appointment runs its full term.
Q29. Do LLPs file ADT-1?
No. LLP audit requirements arise under the LLP Act, 2008 and its rules, on turnover and contribution thresholds — a different regime altogether.
Q30. What if the Board misses the 30-day window for the first auditor?
The power shifts to the members, who must appoint at an extraordinary general meeting within ninety days. The company should not operate without a validly appointed auditor — the audit obligation does not pause while the seat is empty.
Corporate — related reading
- Company incorporation in Indiawhere the thirty-day first-auditor clock starts
- Annual filings: AOC-4 and MGT-7the filings that sit on top of a valid audit — due 30 and 60 days from the AGM
- Director appointments and DIR-12the other short-fuse intimation companies miss
- Secretarial compliance calendarevery ROC deadline for the year, on one page
- Trademark opposition in Indiaa different statute, the same lesson — compliance fails on dates before it fails on merits
- Drafting and vetting of agreementsengagement letters, consents and board documentation done properly
Talk to us before the fifteen days run
Delhi Legal Company handles auditor appointments and the full ADT cycle for Indian companies and foreign-owned subsidiaries — first-auditor appointments at incorporation, AGM appointments and reappointments, Section 139(2) rotation checks, Section 141 eligibility reviews, casual vacancies, ADT-2 removal applications, ADT-3 resignations, and the repair of late or missed filings with the ROC.
How we usually start. Send us the date of the resolution and the auditor's details. We come back with exactly what is due, the documents to gather, the fee and any additional fee already accrued, and — where filings have been missed — the cleanest sequence to repair the record.