GST scrutiny is a review of your returns, audit is a formal examination of your records, and investigation is a deeper inquiry that can include inspection, search and seizure when an officer has reasons to believe tax is being evaded. They sit on a ladder: a scrutiny that goes unanswered can lead to audit, investigation or a demand. Knowing which rung you are on tells you how much time you have and who to involve.
Last reviewed: 17 October 2026. Facts checked. We opened the CGST Act text on cbic-gst.gov.in (a consolidated version dated 1 January 2022) for sections 61, 65, 66 and 67, and CBIC Instruction No. 02/2023-GST dated 26 May 2023. We did not open the CBIC rule pages (certificate error) or any later amendment, so confirm current text and numbers.
The three in one table
| Point | Scrutiny | Audit | Investigation |
|---|---|---|---|
| Main provision | Section 61 | Sections 65 and 66 | Section 67 and related powers |
| What is examined | Returns and related particulars | Records, returns and documents | Suspected suppression, excess credit or evasion |
| Who starts it | The proper officer | The Commissioner or an authorised officer (65); a nominated CA or cost accountant (66) | An officer of Joint Commissioner rank or above authorises (67) |
| How you are told | A notice asking for an explanation | Written notice, at least fifteen working days before an audit under 65 | Authorisation to inspect, search or seize |
| Your first move | Reply with explanation or corrected return | Prepare records and a contact person | Get legal advice early |
Scrutiny
Section 61 lets the proper officer scrutinise a return and related particulars to check that it is correct, then tell you about discrepancies and seek your explanation. If the explanation is acceptable, the matter ends and no further action follows.
CBIC Instruction 02/2023 explains the working. Returns are picked using risk parameters. The officer relies on data already available, such as returns, GSTN and e-way bill data. The instruction says that at this stage there should normally be no need to ask you for documents before the notice, and that interface should be minimal. The notice is ASMT-10, your reply is ASMT-11, and the closing order is ASMT-12.
If you do not give a satisfactory explanation within thirty days, or any further period the officer allows, or you accept the discrepancy and do not correct it, the officer can start further action. Section 61 says this includes action under section 65, 66 or 67, or determining tax under sections 73 or 74.
Audit
Audit under section 65 can be ordered for any registered person. Officers can audit at your premises or in their office. Notice must be at least fifteen working days before the audit. It should be completed within three months of commencement, extendable by up to six months with written reasons. At the end, the officer must tell you the findings, your rights and obligations and the reasons within thirty days. If the audit finds tax unpaid or short paid, an erroneous refund, or wrongly availed or utilised credit, the officer may start action under section 73 or 74.
Special audit under section 66 is different. An officer of at least Assistant Commissioner rank can, with the Commissioner's prior approval, direct you to have your records audited by a CA or cost accountant nominated by the Commissioner. It is used in cases of complexity where value appears wrongly declared or credit looks beyond normal limits. You get a hearing before the findings are used against you. Our guide to GST audit and the annual return reconciliation covers both in more detail.
Investigation
The Act has no section titled "investigation" in the way it has for audit. The power we opened is section 67, inspection, search and seizure. Under it, an officer of Joint Commissioner rank or above who has reasons to believe that a taxable person has suppressed a transaction or stock, claimed credit beyond entitlement, or contravened the law to evade tax can authorise another officer in writing to inspect places. Section 67 also covers transporters and warehouse owners who keep goods that have escaped tax or keep accounts in a way likely to cause evasion. We did not read the rest of the section, so seek advice on the full powers.
Section 66 refers to "scrutiny, inquiry, investigation or any other proceedings" as stages at which a special audit can be directed. In practice, you should treat any summons or inspection authorisation as serious and involve counsel.
What this means for you
- Scrutiny stage: reply fully and early. It is the cheapest stage to fix.
- Audit stage: assign one person to handle the officer. Keep a log of every document you hand over.
- Investigation stage: do not guess. Get legal advice before you give statements or documents.
A short checklist
- Keep GSTR-1, 3B, 2B and books reconciled every month.
- Reconcile the annual return with the audited accounts.
- Keep a notice register with form, date, due date and owner.
- Know who can sign replies and hold the digital signature.
- Keep supplier credit evidence together for each tax period.
Use the GST 2B reconciliation checker for monthly credit checks. For the notice side, see GST notices: types and how to respond.
Frequently Asked Questions
Is GST scrutiny the same as a GST audit?
No. Scrutiny under section 61 reviews your returns and asks for explanations. Audit under section 65 examines your records after notice.
Can scrutiny lead to audit or investigation?
Yes. Section 61 says that if no satisfactory explanation is given, the officer can take action including under sections 65, 66 or 67, or determine tax under sections 73 or 74.
Who can order a search?
Under section 67 an officer of Joint Commissioner rank or above, who has reasons to believe the listed conditions apply, authorises another officer in writing.
Do I get notice before an audit?
Under section 65 you get notice at least fifteen working days before a departmental audit. We did not check whether any other process has a different notice rule.
What is the best way to reduce the risk of any of these?
Keep returns, credit claims and books consistent each month, and answer every notice on time.
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