What Is Form 27 in India (2026)? Statement of Working, Who Must File, Deadlines & Penalties

Last reviewed: 22 May 2026

If you manage even a single Indian patent, understanding what is Form 27 in India has moved from a back-office housekeeping task to a board-level compliance priority in 2026. The Patents (Amendment) Rules, 2024, and further refinements under the Patent (Amendment) Rules, 2025, overhauled the Statement of Working regime, creating condensed filing windows with hard deadlines that apply to patentees, licensees and non-resident owners alike. For the current cycle, the filing window opened on 1 April 2026 and closes on 30 September 2026, with a Form 4 extension mechanism available in limited circumstances.

This guide delivers the exact legal framework, entity-specific obligations, step-by-step e-filing instructions, worked examples and a 90-day remediation plan that in-house IP teams and patent counsel can put into action immediately.

1. What Is Form 27? Legal Basis and Purpose

Form 27 is the official template through which patent holders and licensees disclose whether, and to what extent, a patented invention has been commercially worked in India during a given financial year. The requirement originates from Section 146(2) of the Patents Act, 1970, which empowers the Controller General of Patents to call for information regarding the working of patented inventions. Rule 131(1) of the Patent Rules, 2003 operationalises this power by mandating that every patentee and every licensee furnish a Statement of Working in Form 27 for each financial year.

The stated legislative purpose is twofold. First, it provides the IPO with transparent data on whether patents are being used productively within India, information that feeds directly into decisions on compulsory licensing under Sections 84 and 85 of the Patents Act, 1970. Second, it functions as a public-interest safeguard: if a patent is not worked in the territory for three consecutive years, any interested person may apply to the Controller for a compulsory licence. The Form 27 record is the primary evidentiary basis the Controller examines when assessing such applications.

Before 2024, the form was relatively simple, and compliance enforcement was inconsistent. The Patent Amendment Rules, 2024 substantially restructured the content, deadlines and granularity of Form 27, demanding patent-by-patent reporting with quantified manufacturing output, revenue, import and export data, and details of any licensing arrangements. These changes transformed Form 27 from a largely ministerial filing into a substantive commercial disclosure exercise.

2. Who Must File Form 27, Parties and Entity Types

Understanding who bears the filing obligation is the first step in any compliance audit. Under the amended Rule 131, the duty falls on two primary categories: the patentee (owner) and the licensee. Industry observers expect that the IPO will increasingly scrutinise non-resident patentees and multinational portfolio holders, who historically under-reported or missed filings entirely.

Entity-by-entity breakdown

A multinational corporation with 200 Indian patents must file 200 individual Form 27 statements, one per patent, per financial year, unless multiple patents share identical working data and can be grouped under the IPO’s consolidated filing guidance. Start-ups holding even a single granted patent are not exempt: the obligation attaches to the grant itself, not to the size or turnover of the entity.

3. Which Patents and Financial Years Are in Scope (2023–2026 Transitional Logic)

The Patent Amendment Rules, 2024 introduced a transitional framework that determines which patents fall into the 2026 filing window and how far back the reporting lookback extends. The Patent (Amendment) Rules, 2025 made further refinements to the transitional calendar, which the IPO clarified through published FAQs. The practical effect is a tiered system based on the date of patent grant.

Transitional timeline table

The critical takeaway is that the 2026 window captures a three-year lookback for the majority of existing Indian patents. In-house IP teams should note that patents granted on or before 31 March 2023 are squarely within the 30 September 2026 deadline. The IPO FAQs, as reported by K&S Partners, confirmed that the prospective application date for the amended rules is 15 March 2024, meaning all patents in force before that date must comply with the transitional schedule rather than the new ongoing annual cycle.

Patent expiry, how it affects Form 27 reporting

A patent in India expires 20 years from the date of filing the complete specification. If a patent expired before 1 April 2023, it generally falls outside the reporting obligation for the 2026 window. However, if the patent was in force during any part of the financial years within the lookback period, a Form 27 covering that period of active protection is still due. IP managers should cross-reference expiry dates against the financial-year ranges above when scoping their audit.

4. 2026 Filing Window: Exact Deadlines, Form 4 Extension Steps and Deadlines

For most patentees, the 2026 Form 27 filing window is the most consequential compliance date on the Indian patent calendar this year. The window operates as follows:

• Window opens: 1 April 2026
• Window closes: 30 September 2026
• Scope: All patents granted on or before 31 March 2023, covering FY 2023-24, FY 2024-25 and FY 2025-26

Form 4 extension mechanics

Where a patentee or licensee is unable to file within the standard window, Rule 138 of the Patent Rules, 2003 permits a request for extension of time by filing Form 4 together with the prescribed fee. The extension is available for a period of up to three months beyond the original deadline. In practice, this means that a Form 4 filed before 30 September 2026 can extend the Form 27 deadline to 31 December 2026. The IPO’s published FAQs, summarised by both Selvam & Selvam and K&S Partners, confirm that Form 4 extensions are discretionary and should be supported by reasonable justification.

Step-by-step Form 4 process

1. Identify the need early. By mid-August 2026, assess whether data collection for all in-scope patents will be complete before 30 September 2026. If not, initiate the extension process.
2. Prepare Form 4. Specify each patent number for which the extension is sought, the reason for delay (e.g., data collection from overseas subsidiaries, ongoing licence renegotiation), and the requested extension period (up to three months).
3. Pay the prescribed fee. The fee for Form 4 varies by entity type (natural person, small entity, or other entity). Fees are payable through the IPO e-filing portal.
4. File electronically. Submit Form 4 via the IPO e-filing system before the original 30 September 2026 deadline.
5. Track acknowledgement. Monitor patent e filing status through the IPO portal to confirm the extension has been recorded.
6. File Form 27 within the extended period. Complete and submit all Form 27 statements by 31 December 2026 at the latest.

Portfolio audit timeline (milestones for in-house teams)

5. How to File Form 27, Practical E-Filing Workflow

Form 27 is filed electronically through the IPO’s e-filing portal. The process requires a registered account with valid patent e filing login credentials. Below is a step-by-step checklist for completing and submitting the form.

Data collection checklist

Before logging into the portal, assemble the following information for each patent and each in-scope financial year:

• Patent number and grant date.
• Whether the patent was worked commercially in India during the relevant financial year (yes/no).
• If worked: quantum of the patented product manufactured or the patented process used in India (units, volume, or other appropriate measure).
• Value of the patented product manufactured or imported into India (INR).
• Details of licences granted, names of licensees, exclusive or non-exclusive, territory, royalty structure.
• Import and export data, quantities and values of patented products imported into and exported from India.
• If not worked: reasons for non-working and steps being taken to work the patent.

Filing steps

1. Log in to the IPO e-filing portal using your patent e filing login credentials.
2. Navigate to the “Forms” section and select “Form 27, Statement of Working.”
3. Enter the patent number and select the relevant financial year.
4. Complete all required fields, working status, quantities, values, licensing details, and any reasons for non-working.
5. Upload supporting documents (licence agreements, aggregated financial summaries) in PDF format.
6. Verify the declaration, enter the signatory details (patentee, authorised agent, or licensee), and submit.
7. Download the acknowledgement receipt and note the filing reference number.
8. Check patent e filing status after 48 hours to confirm the filing has been processed.

Common errors to avoid

• Mismatched financial years: Ensure each Form 27 covers exactly one financial year (1 April – 31 March); do not combine multiple years into a single filing.
• Incomplete value fields: Leaving revenue or quantity fields blank when the patent was worked triggers IPO queries, use zero values only when genuinely applicable.
• Unsigned forms: The e-filing system requires a digital signature or authorised signatory declaration; unsigned submissions are rejected.
• Late licensee data: Non-resident patentees commonly face delays in obtaining data from Indian licensees. Build a 60-day buffer into your internal timeline.

6. Sample Completed Form 27, Worked Examples

Competitors in the SERP rarely provide worked examples. Below are two hypothetical scenarios demonstrating how to complete key Form 27 fields. These are illustrative only and should be adapted to each patent’s actual data.

Example A: Pharmaceutical device, patent worked commercially

Example B: Software/hardware product, patent not worked

Handling sensitive commercial data

The amended Form 27 requires quantified disclosures that many companies consider commercially sensitive. The IPO has indicated, through its FAQs as summarised by K&S Partners, that filers may report aggregated figures where patent-level revenue breakdowns are not maintained in the ordinary course of business. Industry observers expect that reasonable aggregation accompanied by a brief explanatory note will satisfy the Controller, provided the overall picture of commercial working (or non-working) is transparent.

7. Penalties, Compliance Risk and Enforcement, What Happens If You Don’t File Form 27

Non-compliance with Form 27 carries a range of legal and commercial consequences. While the Patents Act, 1970 does not prescribe a standalone monetary fine solely for failure to file Form 27, the enforcement architecture creates meaningful risk through several interconnected mechanisms.

Penalties and risk matrix

The practical commercial risk is often more significant than the administrative penalty itself. As highlighted by commentary from Mirandah Asia, a patent that lacks Form 27 filings for three or more years presents a ready-made argument for a compulsory licensing applicant. Given that Indian courts have historically treated the working requirement seriously, the Natco v. Bayer compulsory licence grant in 2012 being the landmark example, prudent patentees treat Form 27 compliance as a defensive measure protecting the exclusivity of their rights.

8. Remediation Plan and Checklist for In-House IP Teams (90-Day Plan for Overdue Portfolios)

For organisations that have fallen behind on Form 27 filings, whether due to the pre-2024 lax enforcement environment, internal restructuring, or simple oversight, the following 90-day remediation plan provides a structured pathway back to compliance before the 30 September 2026 deadline.

Phase 1: Audit and scoping (Days 1–20)

• Extract a complete list of all granted Indian patents from your portfolio management system or the IPO public database.
• Cross-reference each patent against the transitional timeline table (Section 3 above) to determine which financial years require Form 27 filings.
• Identify the responsible filer for each patent, patentee, exclusive licensee, or agent of record.
• Flag patents that have expired, lapsed, or been surrendered and confirm whether partial-year filings are still required.

Phase 2: Data collection and verification (Days 21–55)

• Issue standardised data request templates to business units, Indian subsidiaries, licensees and manufacturing partners.
• Collect revenue, output, import/export and licensing data for each patent and each financial year.
• Where patents were not worked, document the reasons and any concrete steps taken toward commercialisation.
• Finance and IP counsel should jointly verify figures before they are entered into Form 27.

Phase 3: Drafting, review and filing (Days 56–80)

• Draft all Form 27 statements, one per patent per financial year.
• Conduct internal legal review, paying particular attention to non-working justifications and any commercially sensitive disclosures.
• Obtain digital signatures or authorised signatory approvals.
• File electronically through the IPO portal in batches, confirming each submission receipt.

Phase 4: Extension and contingency (Days 80–90)

• For any patents where data remains incomplete, file Form 4 requesting a three-month extension before 30 September 2026.
• Continue data collection and file remaining Form 27 statements by 31 December 2026.
• Brief the board or IP committee on compliance status and any residual risk areas.
• Establish a standing annual process to prevent future arrears, integrate Form 27 data collection into year-end financial reporting workflows.

Conclusion

Understanding what is Form 27 in India is no longer optional for any organisation holding Indian patent rights. The Patents (Amendment) Rules, 2024 and 2025 have tightened deadlines, expanded disclosure requirements, and linked non-compliance more directly to compulsory licensing exposure. With the 30 September 2026 deadline approaching, in-house IP teams should treat portfolio-wide Form 27 compliance as an urgent operational priority, conducting audits, collecting data, and filing well ahead of the cut-off to preserve the full exclusivity of their Indian patent rights.

Sources

1. IP India, FORM 27 (official PDF)
2. RNA Technology and IP Attorneys, FAQs on Form No. 27
3. K&S Partners, Indian Patent Office issues FAQs on filing of Statement of Working
4. Chadha & Chadha IP, India patents working statements Form 27 due by September 30, 2026
5. Lexology, Analysis of 2024 amendments and impact
6. Sagacious IP, Amendments to Form 27: evaluating commercial applicability
7. Selvam & Selvam, FAQ on Form 27 per Patent Amendment Rules 2024
8. Mirandah Asia, Drastic changes to patent working requirements
9. Intepat, Statement of working patents India