Form I-XBRL is a legacy web form filed under the Companies Act, 1956, used by companies to file their cost audit report in XBRL format with the Central Government. It is governed by Sections 233B(4) and 600(3)(b) of the Companies Act, 1956 read with the Companies (Cost Audit Report) Rules, 2011.

Companies must convert their cost audit report into an XBRL instance document, validate it using the MCA21 XBRL validation tool, and attach it to Form I-XBRL for submission on the MCA portal.

Note: Form I-XBRL relates to the repealed Companies Act, 1956 cost audit framework. It remains relevant only for historical/pending compliance under that regime; cost audit reporting under the current regime is addressed under the Companies (Cost Records and Audit) Rules, 2014 of the Companies Act, 2013.

Who Should File Form I-XBRL / When is it Filed

Companies subject to a cost audit under the Companies (Cost Audit Report) Rules, 2011 must file their cost audit report with the Central Government in XBRL format via Form I-XBRL, with the validated instance document attached.

Important Checkpoints Before Filing

  • Applicant must be registered as a Business User on the MCA portal; company must hold a valid CIN/FCRN
  • The signing authority must hold a valid, non-expired, non-revoked DSC, registered against the DIN/PAN/Membership number provided
  • The membership number of the cost auditor must correctly correspond to the selected category (Associate/Fellow)
  • The financial year entered must not overlap any financial year for which the company has already filed another (non-defective) Form I-XBRL — multiple filings for the same financial year start/end date are permitted
  • The ‘Date of Start of Reporting Period’ and ‘Date of End of Reporting Period’ elements in the attached instance document must match the financial year ‘From’/‘To’ dates entered in field 3(a)/3(b) of the webform
  • The CIN/FCRN in the attached instance document’s ‘Corporate Identity Number or Foreign Company Registration Number’ element must match field 1(a) of the webform
  • The attached XBRL instance document must be of type ‘Cost Audit Report’
  • The attached document(s) must be successfully validated by the MCA21 XBRL validation tool

Step-by-Step Filing Process

  1. Convert the cost audit report into XBRL format by creating an XBRL instance document
  2. Validate the instance document using the MCA21 XBRL validation tool
  3. Access the MCA homepage and login with valid credentials
  4. Select MCA Services → Company e-Filing → Companies Act 1956 Forms → Form-I-XBRL
  5. Enter CIN/FCRN information and fill up the application
  6. Attach the validated XBRL instance document
  7. Save the webform as a draft (optional)
  8. Submit the webform and note the SRN
  9. Affix the DSC
  10. Upload the DSC-affixed PDF on MCA portal
  11. Receive acknowledgement

Signing Requirements

  • Digitally signed by an authorised signatory (Company Secretary, director/managing director, or manager), with a valid, non-expired, non-revoked DSC registered against their DIN/PAN/Membership number
  • Certification by the cost auditor with a valid ICMAI membership number

Fee Structure

The Instruction Kit marks the fee-rules section as not applicable — no filing fee is prescribed for Form I-XBRL.

Processing Mode

Form I-XBRL is processed in STP mode — taken on record electronically without further processing. There is no provision for resubmission.

Frequently Asked Questions (FAQs)

Q1. Who must file Form I-XBRL? Companies subject to a cost audit under the Companies (Cost Audit Report) Rules, 2011, filing their cost audit report with the Central Government.

Q2. Is there a fee for filing Form I-XBRL? No — the fee-rules section is marked not applicable.

Q3. Can multiple Form I-XBRL filings be made for the same financial year? Yes, provided they are for the same financial year start and end date; the financial year entered must not overlap a different financial year already covered by a non-defective filing.

Q4. What validation must the XBRL instance document pass before attachment? It must be successfully validated by the MCA21 XBRL validation tool and must be of type ‘Cost Audit Report’.

Q5. Is Form I-XBRL processed automatically? Yes, it is processed in STP mode with no provision for resubmission.

Disclaimer

This article is based on the official Instruction Kit published by the Ministry of Corporate Affairs (MCA), Government of India. While every effort has been made to ensure accuracy, the content is intended for general guidance purposes only. MCA forms, rules, and fee structures are subject to change through amendments to the Companies Act, 2013 or notifications issued thereunder.

In case of any inconsistency or doubt, readers are advised to refer to the official MCA helpkit and resources available on MCA website.