Income Tax Form 81 is an audit report prescribed under section 232(21) of the Income Tax Act, 2025 for companies opting for taxation under the Tonnage Tax Scheme. It replaces Form 66 under earlier provisions and must be prepared and certified by an accountant, verifying the correctness of books of account, computation of shipping income, and compliance with statutory requirements. The form requires detailed disclosures, including maintenance of separate books, compliance with charter-in limits, computation of tonnage income, related party transactions, depreciation, and reserve accounts. It also mandates annexures for specific disclosures and explanations where necessary. The report must be furnished electronically before the specified due date linked to return filing timelines. Its purpose is to ensure independent verification, transparency, and adherence to statutory conditions governing shipping companies under the scheme, enabling the tax authorities to assess compliance and accuracy of reported income.
Income Tax Department
Ministry of Finance, Government of India
FAQs on Income Tax Form 81: Audit Report under section 232(21) of Income Tax Act, 2025
Audit Report under section 232(21) of the Act
| Name of form as per I.T. Rules, 1962 | Form 66 | Name of form as per I.T. Rules, 2026 | 81 |
| Corresponding section of I.T. Act, 1961 | 115VW | Corresponding section of I.T. Act, 2025 | 232 |
| Corresponding Rule of I.T. Rules, 1962 | 11T | Corresponding Rule of I.T. Rules, 2026 | 146 |
Q1. What is Form 81?
Answer: Form 81 is a report to be furnished by an accountant certifying the correctness of particulars relating to:
- Maintenance of books of account, and
- Computation of income under the Tonnage Tax Scheme, by a company engaged in the business of operating qualifying ships.
Q2. Who is required to furnish Form 81?
Answer: Form 81 is required to be furnished by a company which has opted for taxation under the Tonnage Tax Scheme, in respect of the relevant tax year.
Q3. Who is authorised to furnish and sign Form 81?
Answer: Form 81 is required to be prepared, signed, and verified by an accountant as defined under section 515(3)(b) of the Income-tax Act, 2025.
Q4. What are the main parts of Form 81?
Answer: Form 81 consists of the following parts:
- Part A – Particulars of the company
- Part B – Particulars of books of account and computation details
- Verification – Certification by the accountant
- Annexures – Supporting notes and documents, wherever applicable
Q5. What details are required to be furnished in Part A of Form 81?
Answer: Part A requires basic particulars of the company, including:
- Name and address,
- Permanent Account Number (PAN),
- Contact details, and
- Relevant tax year.
Q6. What information relating to books of account is required in Part B?
Answer: Part B requires disclosure of:
- The tax year from which the option for tonnage tax is effective,
- Whether separate books of account are maintained for the tonnage tax business,
- The list of books of account maintained and examined, and
- The addresses at which such books are kept.
- Confirmation with regard to the Charter-in limit, computation of relevant shipping income, details of tonnage tax reserve account, computation of tonnage tax income, details of related party transactions, computation of depreciation as per Section 229(1) to (7), details of assets (other than ships) not used exclusively for the tonnage tax business and details of losses relating to the business of operating qualifying ships, if any.
Q7. Is maintenance of separate books of account mandatory?
Answer: Yes. The company is required to maintain separate books of account in respect of the business of operating qualifying ships, as mandated under the Tonnage Tax Scheme.
Q8.What is meant by “limit for charter-in” and how is it reported in Form 81?
Answer: The limit for charter-in refers to the restriction prescribed under section 232(15) of the Act, whereby the tonnage of chartered-in ships should not exceed 49% of the total tonnage.
The accountant is required to certify whether this limit has been correctly computed and complied with.
Q9. What details of shipping income are required to be furnished?
Answer: The company is required to furnish:
- Profits from core activities referred to in section 235(1)(a), and
- Whether profits from incidental activities exceed 0.25% of the turnover from core activities.
Q10. What is the Tonnage Tax Reserve Account and what details are required?
Answer: The Tonnage Tax Reserve Account is a statutory reserve required under the Act.
Form 81 requires disclosure of:
- Book profits,
- Minimum reserve required to be created, and
- Whether the reserve has been utilised strictly in accordance with section 232(6).
Q11. How is computation of tonnage income reported in Form 81?
Answer: The computation of tonnage income under sections 227(1) to 227(6) is to be reported ship-wise, including:
- Net or deemed tonnage,
- Ownership or charter status,
- Kind of charter,
- Daily tonnage income,
- Number of days operated, and
- Total tonnage income.
Q12.Is it mandatory to mention the name of the ship in all cases?
Answer: No. As per Note 3, there is no requirement to mention the name of the ship where income is computed on a deemed tonnage basis.
Q13. Are related party transactions required to be reported?
Answer: Yes. Details of transactions with related parties are required to be furnished along with a separate explanatory note as Annexure A-2.
Q14. What depreciation details are required to be reported in Form 81?
Answer: Form 81 requires:
- Computation of depreciation in accordance with section 229(1) to (7), and
- Asset-wise or block-wise details including rate of depreciation, actual cost or WDV, and adjustments on account of tax credit, exchange variation, subsidies, or grants.
Q15. Are details of assets not used exclusively for tonnage tax business required?
Answer: Yes. Details of assets other than ships not used exclusively for the tonnage tax business
are required to be furnished along with a supporting note as Annexure A-3.
Q16. Are losses relating to the tonnage tax business required to be reported?
Answer: Yes. Any losses relating to the business of operating qualifying ships are required to be disclosed along with a separate explanatory note as Annexure A-4.
Q17. Are annexures mandatory where applicable?
Answer: Yes. Wherever a matter is required to be explained through an annexure as per the Notes, such annexure is mandatory.
Q18. What should be done if any information is reported in the negative or with qualification?
Answer: Where any matter is answered in the negative or with qualification, the accountant must clearly state the reasons in the report.
Q19. Is any information in Form 81 pre-filled?
Answer: Yes. Certain information may be pre-filled based on data available with the Income-tax Department. However, responsibility for correctness remains with the assessee and the reporting accountant.
Q20. In what currency should amounts be reported in Form 81?
Answer: All amounts should be reported in Indian Rupees (₹) unless otherwise specified.
Q21. Why is Form 81 important?
Answer: Form 81 ensures:
- Independent verification of tonnage tax computations,
- Compliance with statutory limits and conditions, and
- Integrity and audit reliability of income declared under the Tonnage Tax Scheme.
Guidance Note on Income Tax Form 81: Audit Report under section 232(21) of the Act
Audit Report under section 232(21) of the Act
| Name of form as per I.T. Rules, 1962 | Form 66 | Name of form as per I.T. Rules, 2026 | 81 |
| Corresponding section of I.T. Act, 1961 | 115VW | Corresponding section of I.T. Act, 2025 | 232 |
| Corresponding Rule of I.T. Rules, 1962 | 11T | Corresponding Rule of I.T. Rules, 2026 | 146 |
Purpose
Form No. 81 is prescribed for furnishing the audit report under section 232(21) of the Act in respect of a company that has opted for taxation under the Tonnage Tax Scheme.
The report is required to be furnished by an accountant certifying the correctness of particulars relating to maintenance of books of account, computation of income under the tonnage tax scheme and compliance with the provisions governing such scheme.
The information furnished in the form enables the Income-tax Department to verify the computation of income from the business of operating qualifying ships and the compliance with the statutory conditions prescribed under the Act.
Who Should File
Form No. 81 is required to be furnished by a company which has opted for taxation under the Tonnage Tax Scheme, in respect of the relevant tax year.
The report is required to be prepared and certified by an accountant as defined under section 515(3)(b) of the Act.
What is the due date for filing the Form?
Form No. 81 shall be furnished on or before the “specified date” referred to in section 63 of the Act. As per section 63(5)(a), the specified date means the date one month prior to the due date for furnishing the return of income under section 263(1) for the relevant tax year.
Accordingly, the audit report in Form No. 81 is required to be furnished on or before the specified date prescribed under section 63 of the Act.
Structure of Form
Form No. 81 broadly consists of the following parts:
1. Part A – Particulars of the company
2. Part B – Particulars of books of accounts and computation details
3. Verification by the accountant
4. Annexures
Part A captures basic details of the company, while Part B contains information relating to maintenance of books of account, compliance with charter-in limits, computation of shipping income and other statutory disclosures.
What are the documents required to file the Form
The following documents may be required to be furnished as annexures to Form No. 81:
1. Certificate of charter-in or charter-out arrangements for ships under time charter, voyage charter, bareboat charter or bareboat charter-cum-demise basis.
2. Note on transactions of the company with related parties.
3. Note on assets (other than ships), if any, not used exclusively for the tonnage tax business.
4. Note on losses relating to the business of operating qualifying ships.
These annexures provide additional explanations and supporting details required for the audit certification.
What is the process flow of filing Form
The process flow broadly involves the following steps:
1. The company prepares the particulars required under Form No. 81 relating to maintenance of books of account, computation of shipping income and other disclosures required under the Tonnage Tax Scheme.
2. The reporting accountant examines the books of account and supporting records and prepares the audit report in Form No. 81.
3. Where required, explanatory notes and supporting annexures are prepared and attached.
4. The completed audit report is furnished electronically through the income-tax e-filing portal in the manner prescribed.
5. The report forms part of the compliance framework for companies governed by the Tonnage Tax Scheme and may be examined by the jurisdictional income-tax authority.
Outcome of Processed Form
Upon furnishing of the audit report:
- The Income-tax Department is able to verify the correctness of the computation of income under the Tonnage Tax Scheme.
- The report provides independent certification regarding maintenance of books of account, compliance with charter-in limits and other statutory conditions applicable to the scheme.
- Any discrepancy or non-compliance reported in the audit report may be examined during assessment or other proceedings under the Act.
Common Changes made across Forms
1. To make Forms system-friendly and enable e-filing and uploading, certain anomalies found due to grouping of Name, Designation, Address, PAN and Aadhaar number have been separated into different boxes.
2. Assessment / Financial / Previous year or years have been replaced with Tax year or years, wherever appearing in the Form/Annexure.
3. Sections, Clauses and Schedules changes as per the Income-tax Act, 2025.
4. Currency symbol “Rs.” has been replaced with “₹”.
