Section 439 explained: this guide covers what it means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.
Section 439 lets the Competent Authority impose a penalty, in addition to tax, on a person who has under-reported income, and a higher penalty where the under-reporting is a result of misreporting. This article explains the section sub-section by sub-section, as per the Income-tax Act, 2025 as amended by the Finance Act, 2026.
Later amendments, rules and notifications should be checked before you act. If a penalty notice has reached you, our legal dispute resolution service can help with the reply.
The penalty is 50% of the tax payable on under-reported income (sub-section (9)) and 200% of that tax where the under-reporting is in consequence of misreporting (sub-section (10)). Sub-section (11) lists the cases of misreporting. Sub-section (8) lists amounts that are not under-reported income. The Finance Act, 2026 changed sub-section (11), with effect from 1-4-2026, and inserted sub-section (13A).
Who imposes the penalty
Sub-section (1) says the Competent Authority may, during the course of any proceedings under the Act, impose penalty on any person who has under-reported income; the penalty is payable in addition to tax, if any. Sub-section (15)(a) defines the Competent Authority as the Assessing Officer, the Joint Commissioner (Appeals), the Commissioner (Appeals), the Commissioner or the Principal Commissioner. The penalty is imposed by an order in writing (sub-section (14)). Procedure and limitation are in sections 471 and 472; see our post on procedure and time limit for imposing penalties.
When income is deemed under-reported: sub-section (2)
A person is deemed to have under-reported income in the seven cases of sub-section (2):
| Clause | Case |
|---|---|
| (a) | Income assessed is greater than income determined in the return processed under section 270(1)(a) |
| (b) | Income assessed is greater than the maximum amount not chargeable to tax, where no return was furnished or the return was furnished for the first time under section 280 |
| (c) | Income reassessed is greater than the income assessed or reassessed immediately before |
| (d) | Deemed total income assessed or reassessed under section 206(1) and (2) is greater than the deemed total income in the return processed under section 270(1)(a) |
| (e) | Deemed total income assessed under section 206(1) and (2) is greater than the maximum amount not chargeable to tax, where no return was furnished or it was furnished for the first time under section 280 |
| (f) | Deemed total income reassessed under section 206(1) and (2) is greater than that assessed or reassessed immediately before |
| (g) | Income assessed or reassessed reduces a loss or converts the loss into income |
The amount of under-reported income: sub-sections (3) to (7)
Sub-section (3) fixes the amount. Where income is assessed for the first time and a return was furnished, it is the difference between the income assessed and the income under section 270(1)(a). Where no return was furnished, or the return was first furnished under section 280, it is the whole income assessed in the case of a company, firm or local authority, and the difference between income assessed and the maximum amount not chargeable to tax for anyone else. In any other case it is the difference between the income reassessed or recomputed and the income in a preceding order.
Sub-section (4) gives a formula where under-reported income arises from deemed total income under section 206(1) and (2): (A - B) + (C - D), with A, B, C and D defined in the sub-section by reference to the general provisions and to section 206. Sub-section (5)(a) says an amount considered under both section 206 and the general provisions is not reduced from total income when finding D; sub-section (5)(b) says that where an assessment reduces a declared loss or converts it into income, under-reported income is the difference between the loss claimed and the income or loss assessed or reassessed.
Sub-sections (6) and (7) deal with a receipt, deposit or investment whose source is claimed to be an amount added to income, or deducted in computing loss, in an earlier tax year in which no penalty was levied. Under-reported income then includes enough of that amount to cover the receipt, deposit or investment, taken in order from the first preceding year backwards.
What is not under-reported income: sub-section (8)
Under-reported income does not include:
- (a) an amount for which the assessee offers an explanation that the Competent Authority is satisfied is bona fide, with all material facts disclosed;
- (b) an amount determined on estimate, if the accounts are correct and complete but the method is such that income cannot properly be deduced from them;
- (c) an amount determined on estimate where the assessee estimated a lower addition or disallowance on the same issue, included it in the computation and disclosed the material facts;
- (d) an addition in conformity with the arm's length price determined by the Transfer Pricing Officer, where the assessee kept the prescribed information and documents under section 171, declared the international transaction under Chapter X and disclosed all material facts.
The rates: sub-sections (9) to (11)
Sub-section (9): the penalty is 50% of the tax payable on under-reported income. Sub-section (10): irrespective of sub-sections (8) or (9), where under-reported income is in consequence of misreporting, the penalty is 200% of the tax payable on under-reported income.
The cases of misreporting in sub-section (11) are: (a) misrepresentation or suppression of facts; (b) failure to record investments in the books of account; (c) claim of expenditure not substantiated by any evidence; (d) recording of any false entry in the books of account; (e) failure to record any receipt in books of account having a bearing on total income; (f) failure to report any international transaction, deemed international transaction or specified domestic transaction to which Chapter X applies; and (g) income referred to in section 195(1)(b).
By footnotes to sub-section (11), the Finance Act, 2026, with effect from 1-4-2026, omitted the word "and" at the end of clause (e), substituted "apply; and" at the end of clause (f), and inserted clause (g). The rate of tax under section 195 is explained in our section 195 post.
The tax payable on under-reported income: sub-section (12)
- (a) Where no return was furnished (or the first return was under section 280) and income is assessed for the first time: the tax calculated on the under-reported income as increased by the maximum amount not chargeable to tax, as if it were the total income.
- (b) Where the earlier total income is a loss: the tax calculated on the under-reported income as if it were the total income.
- (c) In any other case: X - Y, where X is the tax on the under-reported income added to the earlier total income, and Y is the tax on the earlier total income.
No double penalty: sub-sections (13) and (13A)
Sub-section (13): no addition or disallowance that has already formed the basis of a penalty in the case of the person, for the same or any other tax year, forms the basis again. Sub-section (13A), inserted by the Finance Act, 2026 with effect from 1-4-2026: where additional income-tax is paid in accordance with section 267(5)(ii), the income on which it is paid does not form the basis of penalty under this section. See section 267 on the updated return.
Procedure points outside section 439
Section 471(4) and (5), inserted by the Finance Act, 2026, provide that where a draft order of assessment under section 275, an assessment under section 270 or a reassessment under section 279 is made on or after 1st April, 2027, the penalty under section 439 forms part of that order. Section 440 allows an application for waiver of penalty and immunity from prosecution on conditions; see section 440.
A worked example
All figures are assumed; names are invented. Sunrise Metals Private Limited's return, processed under section 270(1)(a), shows income of Rs. 40,00,000. On assessment, income is Rs. 50,00,000. Under sub-section (2)(a) and (3)(a)(i), under-reported income is Rs. 10,00,000. Suppose the tax payable on it, worked out as sub-section (12)(c) directs, is Rs. 3,00,000. If there is no misreporting, the penalty under sub-section (9) is 50% of Rs. 3,00,000, which is Rs. 1,50,000. If the Rs. 10,00,000 resulted from a false entry in the books of account (sub-section (11)(d)), the penalty under sub-section (10) is 200% of Rs. 3,00,000, which is Rs. 6,00,000.
Need help with a penalty notice?
A notice proposing a penalty needs a reply that deals with each limb of sub-sections (2) and (8). See our legal dispute resolution service, and our income tax return filing service for returns that report income correctly the first time.
Key takeaways
- Penalty: 50% of tax on under-reported income; 200% in misreporting cases.
- Sub-section (8) lists amounts excluded from under-reported income.
- Sub-section (11)(g) and sub-section (13A) come from the Finance Act, 2026 (w.e.f. 1-4-2026).
- No second penalty on an addition that has already been the basis of penalty.
Read next
- Section 440: waiver of penalty and immunity from prosecution
- Sections 471 and 472: procedure and time limit
- Section 470: the reasonable cause defence
- Section 270: processing, intimation and assessment
- Section 195: tax on income referred to in sections 102 to 106
- Income-tax Act 2025, Chapter XXI: penalties
Disclaimer: Based on the Income-tax Act, 2025 (30 of 2025) as amended by the Finance Act, 2026, as consulted on 2 October 2026. It explains the words of the Act only; the Income-tax Rules, 2026, notifications, circulars, later amendments and the way the tax authorities and courts apply these provisions should be checked. This article is general information, not legal advice; check the official text before acting.