How to Appoint an Auditor in a Private Limited Company: ADT-1, Timelines and Rules

All private limited companies in India must have a statutory auditor to audit their financial statements. The Board of Directors appoints the first auditor within 30 days of incorporation. After that, the shareholders appoint the auditor at the Annual General Meeting (AGM). The company then informs the Registrar of Companies (ROC) of the appointment through Form ADT-1. This guide covers the appointment process, eligibility, ADT-1 filing, timelines, rotation, casual vacancy, and common mistakes.

What Is Form ADT-1?

Form ADT-1 is the prescribed form for notifying the ROC of the appointment, reappointment, or replacement of a company’s auditor. Under the Companies (Audit and Auditors) Rules, 2014, the company must inform the auditor of the appointment and file the notice with the Registrar in Form ADT-1.

The company files the form on the MCA portal after completing the internal appointment process: the Board or shareholder resolution, the auditor’s consent, and the eligibility certificate.

The revised ADT-1 (notified through G.S.R. 359(E) dated 30 May 2025, effective 14 July 2025) has a “Nature of Appointment” field. It lets you select the first auditor appointed by the Board, the first auditor appointed by members at an EGM, an appointment or reappointment at an AGM, or a casual vacancy. Companies must use the latest MCA form, not an old template. See ADT-1 filing for our service.

The government fee depends on the company’s authorised share capital:

Authorised share capital	ADT-1 fee
Up to ₹1,00,000	₹200
₹1,00,001 to ₹5,00,000	₹300
₹5,00,001 to ₹10,00,000	₹400
Above ₹10,00,000	₹600

Confirm the current fee at the time of filing.

Who Must Appoint an Auditor?

Section 139 of the Companies Act, 2013 requires every company to appoint an auditor. This applies whether it is a private limited company, newly incorporated, making a loss, dormant, or has a low turnover. The auditor independently reviews the financial statements and gives an audit report. See audits for private limited companies for more.

A newly incorporated private limited company must plan ahead, because the first auditor has to be appointed within 30 days of incorporation.

No private company is exempt from audit at present. The pending Corporate Laws (Amendment) Bill, 2026 proposes an exemption from appointing an auditor for prescribed classes of companies, and a Joint Committee has recommended limiting it to private companies. It isn’t law yet, so don’t plan around it.

Who Can Be Appointed as an Auditor?

The statutory auditor must be either:

• A Chartered Accountant holding a valid Certificate of Practice; or
• A firm of Chartered Accountants, including an LLP, in which the majority of partners practising in India are qualified to be auditors.

The proposed auditor must give written consent, along with a certificate that:

• They are eligible and not disqualified under Section 141.
• The appointment is within the limits prescribed in the Act and Rules.
• No professional misconduct proceedings are pending against them, or details of any that are.

Check for Disqualifications

The company should check that the proposed auditor doesn’t fall under Section 141(3). The main disqualifications include:

• A body corporate (other than an LLP).
• An officer or employee of the company, or a partner or employee of one.
• A person with a business relationship with the company, or with its holding, subsidiary, or associate company, as prescribed.
• Indebtedness to the company, or giving a guarantee for a third party’s debt to it, beyond the prescribed limits.
• Holding securities of the company or its group beyond the prescribed limits, or relatives who do so.
• Being appointed as auditor of more than 20 companies. OPCs, dormant companies, small companies, and private companies with paid-up capital below ₹100 crore are excluded from this count.
• Being convicted of fraud involving at least ₹1 crore (disqualified for ten years).

Services an Auditor Cannot Provide

Section 144 prohibits the company’s auditor from providing certain other services to the company. These include accounting and book-keeping, internal audit, designing financial information systems, investment advisory, and management services. A CA firm that keeps your books therefore cannot also be your statutory auditor. Use separate firms.

Appointment of First Auditor

For a private limited company that is not a government company, the Board of Directors appoints the first auditor within 30 days of incorporation under Section 139(6).

If the Board fails to appoint, it must inform the members, who must appoint the auditor at an Extraordinary General Meeting (EGM) within 90 days. The first auditor holds office until the conclusion of the first AGM, which must be held within nine months of the end of the first financial year. The company can reappoint the same auditor at that AGM.

Appointment of Auditor at First AGM

At the first AGM, the shareholders appoint an auditor, either an individual or an audit firm, by ordinary resolution. The auditor holds office from the conclusion of that AGM until the conclusion of the sixth AGM.

The requirement to ratify the auditor’s appointment at every AGM was removed with effect from 7 May 2018. A private limited company therefore doesn’t need to ratify the appointment at later AGMs, as long as the auditor remains eligible and doesn’t resign or get removed.

Remuneration

The auditor’s remuneration is fixed by the company in a general meeting, or in the manner the company decides. The Board fixes the remuneration of the first auditor.

Key Timelines

Event	Deadline
Board appoints first auditor	Within 30 days of incorporation
If the Board fails, members appoint at an EGM	Within 90 days of incorporation
ADT-1 for the appointment	Within 15 days of the meeting
First AGM	Within nine months of the end of the first financial year
Auditor appointed at first AGM	Until the sixth AGM
Casual vacancy filled by the Board	Within 30 days of the vacancy
Resignation: approval in general meeting	Within three months of the Board’s recommendation
Auditor’s notice of resignation (ADT-3)	Within 30 days of resigning

Step-by-Step Process to Appoint an Auditor

1. Identify a suitable auditor

Choose a Chartered Accountant or CA firm with industry experience, the capacity to audit your accounts, and no conflict of interest. The directors, or the audit committee, where there is one, should consider the auditor’s qualifications and experience.

2. Get consent and the certificate of eligibility

Before the appointment, obtain:

• The auditor’s written consent.
• A certificate of eligibility and non-disqualification.
• Confirmation that the appointment is within the prescribed limits.
• Details of any professional proceedings pending against the auditor.

3. Pass the Board resolution

For the first auditor, pass the Board resolution within 30 days of incorporation. For an appointment at an AGM, the Board recommends the auditor to the shareholders.

4. Get shareholder approval

The members appoint the auditor at the AGM for the statutory term. Make sure the auditor isn’t disqualified and hasn’t declined reappointment.

5. Issue the letter of appointment

Provide a letter of appointment covering the audit scope, fee, deliverables, timelines, management responsibilities, and the process of resignation or termination. Inform the auditor of the appointment in writing.

6. File Form ADT-1

File ADT-1 with the ROC within 15 days of the meeting at which the auditor is appointed.

Sample Board Resolution for the First Auditor

“RESOLVED THAT pursuant to Section 139(6) of the Companies Act, 2013 and the rules made thereunder, M/s [Name of Firm], Chartered Accountants (Firm Registration No. []), having given their written consent and a certificate that they are eligible and not disqualified under Section 141, be and are hereby appointed as the first statutory auditor of the Company, to hold office until the conclusion of the first Annual General Meeting, at a remuneration of ₹[] plus applicable taxes and out-of-pocket expenses.

RESOLVED FURTHER THAT any Director of the Company be authorised to issue the letter of appointment and to file Form ADT-1 with the Registrar of Companies, and to do all acts necessary to give effect to this resolution.”

How to File Form ADT-1 with MCA

• Filing schedule: The company must inform the auditor of the appointment and file Form ADT-1 with the Registrar within 15 days of the meeting at which the auditor was appointed.
• Mode of filing: ADT-1 is filed electronically on the MCA portal. The form asks for the company’s CIN, the auditor’s details (PAN, membership number or firm registration number, address, email), the nature of appointment, the appointment date, and the term. Attach the Board or shareholder resolution, the auditor’s consent and eligibility certificate, and the letter of appointment or intimation to the auditor.
• Signing and fees: The form is digitally signed by an authorised director or officer of the company. No professional certification is generally needed for ADT-1. Check the form’s current instructions. Pay the fee based on authorised share capital, as shown above.
• After filing: After the ROC approves the form, the appointment is recorded in the MCA records. Preserve the challan, acknowledgement, and SRN. MCA’s annual filing form for financial statements (AOC-4) asks for the ADT-1 SRN, so you’ll need it later.

Is ADT-1 needed for the first auditor?

Rule 4(2) of the Audit and Auditors Rules refers to appointment at a meeting under Section 139(1), so the legal position on first auditors has been debated. In practice, the revised ADT-1 now includes a first-auditor option, and MCA’s filing system expects it. File ADT-1 within 15 days of the Board meeting at which the first auditor is appointed, and confirm the position for your company with a professional.

For more on due dates, fees, and penalties, read Form ADT-1 filing: due date, fees, and penalty and appointment of auditors under the Companies Act.

Auditor Rotation Rules for Private Limited Companies

Rotation doesn’t apply to every private limited company. Under Section 139(2) and Rule 5 of the Audit and Auditors Rules, rotation does not apply to One Person Companies and small companies. It applies to:

• Private limited companies with paid-up share capital of ₹50 crore or more.
• Other companies (excluding OPCs and small companies) with public borrowings from banks or financial institutions, or public deposits, of ₹50 crore or more.

Where rotation applies:

• An individual can be appointed as auditor for only one term of five consecutive years.
• An audit firm can be appointed for a maximum of two terms of five consecutive years each.
• After a term ends, the auditor can’t be reappointed in the same company for five years.
• A firm that has a common partner with an auditor whose term has ended is also not eligible during this cooling-off period.

Casual Vacancy: Resignation, Removal, or Death of Auditor

A casual vacancy arises from the auditor’s resignation, disqualification, death, or removal. The Board must fill the vacancy within 30 days, except for companies audited by the Comptroller and Auditor-General of India.

Where the vacancy is caused by the auditor’s resignation, the appointment must also be approved by the company in a general meeting held within three months of the Board’s recommendation. The new auditor holds office until the conclusion of the next AGM. File ADT-1 within 15 days for the new appointment.

Auditor Resignation

The steps are:

1. Obtain the auditor’s formal resignation letter.
2. The auditor files Form ADT-3 with the company and the Registrar within 30 days of resigning, stating the reasons.
3. Record the resignation in a Board resolution and identify the casual vacancy.
4. Appoint a successor within 30 days, and get general meeting approval within three months.
5. File ADT-1 for the new auditor.

Auditor Removal

An auditor can be removed before the end of the term only by a special resolution of the company, and only after the Central Government approves, applied for in Form ADT-2. The auditor must be given a reasonable opportunity of being heard. This is not a decision the Board can take alone.

Documents and Information Required for ADT-1

Keep the following ready:

• Certificate of Incorporation and CIN of the company.
• Board resolution or AGM resolution appointing the auditor.
• Written consent of the proposed auditor.
• Auditor’s eligibility and non-disqualification certificate.
• Membership number of the Chartered Accountant, or firm registration details.
• Date of the Board meeting or AGM.
• Date of the auditor’s appointment.
• Term of appointment.
• Auditor’s address and contact details.
• Letter of appointment, or intimation to the auditor.
• DSC of the authorised signatory.

Penalties and Compliance Risks in the Appointment of an Auditor

Not appointing an auditor, filing ADT-1 late, or appointing a disqualified auditor can attract penalties and compliance problems.

• Late filing of ADT-1 attracts additional fees that rise with the delay.
• Section 147 provides for a fine on the company of ₹25,000 to ₹5 lakh for contravening Sections 139 to 146, and a fine and possible imprisonment for officers in default. Confirm the current text before relying on this.
• A delayed appointment can hold up the statutory audit, the annual financial statements, the income tax return, and loan documentation.
• The ADT-1 SRN is needed when you file AOC-4.

Companies must use the latest MCA e-form, in force since 14 July 2025, not the old template.

Common Mistakes Companies Make in the Appointment of an Auditor

1. Missing the 30-day deadline for the first auditor: Founders assume the auditor can be appointed at the first year-end. The law requires the Board to appoint the first auditor within 30 days of incorporation.
2. Not obtaining the auditor’s certificate: Consent alone isn’t enough. The auditor must also certify eligibility, tenure limits, and the status of any proceedings.
3. Filing ADT-1 late: ADT-1 is due within 15 days of the appointment. Late filing adds cost and regulatory risk.
4. Neglecting the rotation thresholds: Companies with ₹50 crore of paid-up capital, or ₹50 crore of public borrowings or deposits, must track their auditor’s tenure.
5. Appointing an ineligible auditor: This can happen when a CA firm shares a partner with the outgoing firm whose term has ended, or when the firm also keeps your books. The Act has detailed provisions to protect the auditor’s independence.
6. Mixing up the first auditor and the AGM auditor: The Board appoints the first auditor, who stays until the first AGM. The shareholders appoint the AGM auditor, who serves until the sixth AGM.
7. Filing ADT-1 every year: ADT-1 is not an annual filing. File it only on appointment, reappointment, or casual vacancy.

How Kanakkupillai Can Help

Selecting an Auditor and Checking Eligibility

• Help you shortlist eligible Chartered Accountants or CA firms for your sector and company size.
• Check auditor independence, conflicts of interest, and Section 141 and Section 144 issues.
• Verify the auditor’s eligibility, consent, and professional standing.
• Check whether auditor rotation applies, based on your paid-up capital, borrowings, and company classification.

First Auditor Appointment

• Draft the Board meeting notice, agenda, and resolution for the first auditor.
• Ensure the appointment is made within 30 days of incorporation.
• Obtain the auditor’s consent and eligibility certificate.
• Maintain the statutory record from the date of incorporation.

AGM Auditor Appointment

• Draft AGM notices, explanatory statements, and shareholder resolutions.
• Handle the auditor’s reappointment or replacement at the AGM.
• Keep track of the five-year tenure.
• Maintain minutes, attendance, and approval documents.

Form ADT-1 Filing

• Draft and file Form ADT-1 on the MCA portal.
• Ensure filing within the 15-day timeline.
• Attach the required company and auditor documents.
• Correct MCA form errors and handle resubmissions.

Casual Vacancy and Auditor Change

• Handle auditor resignation, removal, death, or disqualification.
• Draft the Board and shareholder resolutions for the replacement.
• Ensure the 30-day casual vacancy period is met.
• File the relevant ROC forms and keep the statutory record updated.

Corporate Compliance

• Maintain a compliance calendar for AGMs, board meetings, the annual audit, and ROC filings.
• Coordinate with your auditor on the annual audit process.
• Help with the annual return and financial statements. See annual compliance of a private limited company and the list of statutory compliances for a private limited company.
• Advise on auditor tenure and rotation as part of ongoing governance.

Conclusion

Appointing the auditor isn’t a one-off exercise. It is an essential governance step for every private limited company in India. The key deadlines are clear: appoint the first auditor within 30 days of incorporation, have the shareholders appoint the auditor at the first AGM, and file ADT-1 within 15 days of each appointment. A properly appointed auditor protects your financial credibility, helps you complete the statutory audit, and avoids ROC compliance problems.

FAQs

1. Is auditor appointment mandatory for every private limited company?

Yes. Section 139 requires every company to appoint an auditor, including private limited companies, regardless of their turnover or profit.

2. Who appoints the first auditor in a private limited company?

The Board of Directors appoints the first auditor within 30 days of incorporation. If the Board fails, the shareholders must appoint one at an EGM within 90 days.

3. Is ADT-1 required for the first auditor?

Rule 4(2) refers to appointments under Section 139(1), and the first auditor is appointed under Section 139(6). But the revised ADT-1 has included a first-auditor option since 14 July 2025, and MCA’s filing system expects the form. File it within 15 days of the Board meeting, and confirm the position for your company with a professional.

4. Within how many days must ADT-1 be filed?

Within 15 days of the meeting in which the auditor is appointed.

5. What is the tenure of an auditor appointed at the first AGM?

The auditor appointed at the first AGM holds office from the conclusion of that AGM until the conclusion of the sixth AGM.

6. Do I have to file ADT-1 every year?

No. Ratification at every AGM was removed in 2018. File ADT-1 only on a new appointment, reappointment, or casual vacancy.

7. Can my accountant also be my statutory auditor?

Not if they provide your accounting and bookkeeping. Section 144 prohibits an auditor from providing those services to the same company. Use an independent auditor.

8. What happens if the auditor resigns?

The auditor files Form ADT-3 within 30 days. The Board fills the vacancy within 30 days, the general meeting approves the appointment within three months, and the company files ADT-1.

9. Can a company remove its auditor before the term ends?

Yes, but only by a special resolution and with the Central Government’s approval in Form ADT-2, after giving the auditor a chance to be heard.

10. Is auditor rotation compulsory for a private limited company?

Only for private companies with paid-up share capital of ₹50 crore or more, or companies with public borrowings or deposits of ₹50 crore or more. OPCs and small companies are excluded.

11. Can an LLP of Chartered Accountants be appointed as auditor?

Yes. A firm for this purpose includes an LLP, provided the majority of its partners practising in India are qualified to be auditors.