Section 65 GST Audit: Understanding ‘Commencement’ and 3+6 Month Time Limit

Section 65 GST Audit – Understanding ‘Commencement’ and the 3+6 Month Time Limit (with Recent Case Law)

Section 65 audit is a departmental audit with a defined statutory clock for commencement and completion, and courts are now closely enforcing that clock, especially the 3‑month (extendable to 9‑month) limit from the “commencement of audit”.

Statutory framework of Section 65

• Section 65(1) empowers the Commissioner or authorised officer to undertake audit of any registered person, for such period and frequency as prescribed.
• Audit may be conducted either at the registered person’s place of business or in the departmental office.
• Prior notice (ADT‑01) of not less than 15 working days must be given before conduct of audit.
• Audit must be completed within 3 months from the “date of commencement of audit”, extendable by the Commissioner (with written reasons) by a further period not exceeding 6 months.
• On conclusion, proper officer must intimate findings, rights and obligations within 30 days (ADT‑02), and may proceed under sections 73/74 (now also 74A) if tax short‑payment, wrong ITC, etc. is found.

The Explanation to section 65(4) defines “commencement of audit” as the date on which the records and other documents called for are made available by the registered person, or the actual institution of audit at the place of business, whichever is later.

Commencement date – how to apply section 65(4)

The statute is clear that the clock does not start from the date of ADT‑01 but from the later of two events:

1. When the requested records/documents are made available; or

2. When officers actually institute the audit at the premises.

Articles and professional commentary uniformly read the Explanation in this way and emphasise that the 3‑month (extendable to 9‑month) limit is to be computed from this later date, not from the notice date.

Typical departmental confusion – “incomplete books”

In practice, many officers argue that audit “commences” only when, in their subjective view, “complete” books are produced; they treat earlier production as no commencement if they subsequently ask the taxpayer to “complete” books of account. Commentaries caution that such an approach can be misused to keep the commencement date elastic and undermine the statutory time limit.

A more legally sustainable reading, consistent with the Explanation, is:

• If the department calls for specified records (say, purchase register, sales register, GSTR‑1/3B, trial balance) and the registered person makes those available on a particular date, the audit is deemed to commence on that date (unless officers actually visit later, in which case the later visit date will govern).
• Subsequent requests for clarifications or additional documents in the normal course of audit do not “postpone” the commencement date; otherwise, the mandatory outer limit of 3+6 months would lose meaning. This approach is also endorsed in practitioner articles which warn that the time limit can otherwise be rendered illusory.

Simple example under section 65(4)

Example 1 – Off‑site audit based on records sent:

• ADT‑01 email dated: 01.04.2026, fixing audit to commence on/after 20.04.2026 (15 working days gap complied).
• Officer calls for list of documents in ADT‑01.
• Registered person uploads/sends all called‑for records on 25.04.2026.
• No physical visit is made; audit is conducted from departmental office.

Here, “commencement of audit” = 25.04.2026 (records made available).

• Normal completion limit: 3 months from 25.04.2026 → up to 24.07.2026.
• With valid written extension by Commissioner: maximum up to 24.01.2027 (total 9 months from 25.04.2026).

Example 2 – On‑site audit with later visit:

• ADT‑01 dated 01.04.2026.
• Registered person emails scanned records on 05.04.2026.
• Audit team actually visits factory premises on 20.04.2026 to “institute” audit.

As per Explanation, commencement is the later of 05.04.2026 and 20.04.2026, i.e., 20.04.2026.

• 3‑month limit: till 19.07.2026, extendable (with written, reasoned order) up to 19.01.2027.

If, after 20.04.2026, officers keep saying “books are incomplete, bring more data” and try to argue that audit commenced only when they were personally satisfied, taxpayers can rely on the Explanation plus case law to assert that commencement cannot be indefinitely deferred in this manner.

Completion and time‑limit – 3 months + 6 months

• Section 65(4) mandates completion of audit within 3 months from commencement, with a proviso allowing the Commissioner, for recorded reasons, to extend by a further period not exceeding 6 months.
• Articles on Tax Guru and similar platforms underline that the absolute outer limit for a given audit is therefore 9 months from the commencement date, and audits stretching beyond this without a valid, reasoned extension order are open to challenge as time‑barred under section 65(4).
• Rule 101(1) clarifies that the audit may cover a whole financial year, part of a year, or multiple financial years; however, that does not dilute the 3+6-month time frame once commencement has occurred for that audit.

These write‑ups also stress that prolonged, open‑ended audits are contrary to the scheme of a “time‑bound departmental audit” and may be attacked on grounds of limitation and natural justice, especially where the department continues to rely on a stale audit to issue proceedings.

Key case law on Section 65 audit

1. Rajive And Company Vs Deputy Commissioner (Audit) (Kerala High Court)

• In Rajiv and Company v. Deputy Commissioner (Audit), the Kerala High Court examined section 65(4) and held that “commencement of audit” is to be reckoned from the date on which the requisite books and documents are made available by the registered person, in terms of the Explanation.
• On facts, the assessee had supplied relevant documents only on a later date (e.g., 06‑05‑2024), and the court held that the 3‑month period must be calculated from that date; as the audit report and consequential action were within that window, the challenge on limitation was rejected.
• Commentaries and digests now cite this judgment for two propositions: (i) commencement is strictly tied to availability of records, and (ii) courts will scrutinise the actual dates of supply of records and issuance of audit report while testing limitation under section 65(4).

2.  Abdur Rouf Khan Vs Superintendent of Central Tax (Calcutta High Court)

• In Abdur Rouf Khan v. Superintendent of Central Tax & Ors. (WPA 3987/2025), the Calcutta High Court considered the interplay of section 65 with section 6(2)(b) and prior adjudication under section 73.
• The Court held that a fresh audit under section 65 cannot be initiated in respect of periods already subjected to adjudication under section 73 by another authority, in view of the bar on parallel proceedings in section 6(2)(b).
• The court quashed the audit for overlapping years where State GST authorities had already completed adjudication, but permitted audit for non‑overlapping years, and this judgment is now widely used to resist duplicate/overlapping audits and re‑opening of concluded periods under the guise of section 65.

3. Time‑bar and natural justice – general line

• Commentaries and case‑digests (Tax Guru, Tamim, GST‑Press) document a growing line of authority that audits must respect the statutory 3‑month/9‑month window and that proceedings based on an audit concluded beyond this period, without proper extension, are vulnerable.
• These sources suggest that taxpayers can challenge: (a) ADT‑02 or audit findings issued after expiry of the permissible period; or (b) reliance on such belated audit in section 73/74 notices, as lacking jurisdiction under section 65(4).
• Professional notes further connect this with natural justice, arguing that a prolonged audit defeats the purpose of a time‑bound departmental audit, causes harassment, and can be interfered with where no proper extension order exists or where parallel audits conflict with section 6(2)(b).

Addressing common department practice – your specific query

You have correctly noticed two recurring issues:

1. Officers treating “completion of books” at their satisfaction as the commencement date; and

2. Audits continuing beyond 9 months without a recorded extension from the Commissioner.

On issue (1), the Explanation focuses on the objective event of records “called for” being “made available” by the taxpayer, not the officer’s subjective satisfaction about completeness. Professional commentaries endorse this view and warn against interpreting “commencement” in a way that makes the statutory limit meaningless.

On issue (2), if an audit continues beyond 3 months without any formal extension order of the Commissioner, or beyond 9 months even with extension, practitioners argue that the proceedings are hit by limitation under section 65(4) and any ADT‑02 or subsequent section 73/74 action can be challenged as without authority. The Kerala decision in Rajiv and Company reinforces close scrutiny of dates and statutory compliance, which you can rely on while drafting replies or writ petitions.