Section 439 — Penalty for under-reporting and misreporting of income. Successor to s.270A of the 1961 Act.
Section 439 is in Chapter XXI — Penalties, which runs from section 439 to section 472.
Sub-section (1) lets the Competent Authority impose penalty, in addition to tax, on a person who has under-reported income; sub-section (2) lists seven situations that amount to under-reporting, ranging from assessed income exceeding the income processed under section 270(1)(a), through the no-return and section 280 cases, to reassessment increases, deemed total income cases under section 206(1) and (2), and assessments that reduce a loss or turn it into income. Sub-section (3) quantifies under-reported income, with a special rule that in a no-return case the whole assessed income is taken for a company, firm or local authority and only the excess over the maximum amount not chargeable to tax for others; sub-sections (4) and (5) give the (A – B) + (C – D) formula where deemed total income under section 206 is involved and deal with a reduced or converted loss. Sub-sections (6) and (7) pull an unexplained receipt, deposit or investment back into the earlier year whose addition is claimed as its source, working backwards year by year, and sub-section (8) excludes four categories from under-reported income — a bona fide explanation with full disclosure, estimates where the accounts are correct but the method is defective, estimates where the assessee made his own lower estimate with full disclosure, and transfer pricing additions in conformity with the Transfer Pricing Officer's arm's length price where documentation was kept and the transaction declared. Sub-section (9) fixes the penalty at 50% of the tax payable on under-reported income and sub-section (10) raises it to 200% where the under-reporting is in consequence of misreporting, with sub-section (11) listing the seven cases of misreporting, now including income referred to in section 195(1)(b) added as clause (g) by Act No. 4 of 2026 with effect from 1 April 2026. Sub-section (12) computes the tax payable on under-reported income including the (X – Y) formula, sub-section (13) bars a second penalty on the same addition, sub-section (13A) — also inserted by Act No. 4 of 2026 from 1 April 2026 — takes income on which additional income-tax has been paid under section 267(5)(ii) out of penalty, and sub-sections (14) and (15) require a written order and define Competent Authority and preceding order.
It puts a single graded penalty regime behind the assessment: half the tax where income has simply been under-reported and twice the tax where the under-reporting came about through misreporting of the kind listed in sub-section (11). The exclusions in sub-section (8) are the counterweight — a genuine difference of estimate or view, fully disclosed, is not meant to attract penalty at all.
| What | Figure | The condition on it | Where |
|---|---|---|---|
| Penalty for under-reporting | 50% of the tax payable on under-reported income | Payable in addition to tax; subject to the exclusions in sub-section (8) | Sub-section (9) |
| Penalty where under-reporting is in consequence of misreporting | 200% of the tax payable on under-reported income | Applies notwithstanding sub-sections (8) and (9), in the cases listed in sub-section (11) | Sub-section (10) |
| Under-reported income where no return was furnished | The whole of the income assessed for a company, firm or local authority; for anyone else, the excess of assessed income over the maximum amount not chargeable to tax | Applies where no return has been furnished or a return has been furnished for the first time under section 280 and income is assessed for the first time | Sub-section (3)(a)(ii) |
| Formula for under-reported income involving deemed total income | (A – B) + (C – D) | A and B are computed under the general provisions, C and D under section 206; an amount considered under both is not reduced in computing D | Sub-sections (4) and (5)(a) |
| Tax payable on under-reported income in the general case | (X – Y) | X is tax on under-reported income added to the previously determined or assessed total income; Y is tax on that previously determined or assessed total income | Sub-section (12)(c) |
| Order in which an unexplained receipt, deposit or investment is attributed to an earlier year | The immediately preceding year first, then successively earlier years | Applies where the source is claimed to be an amount added, or deducted in computing loss, in a preceding year for which no penalty was levied | Sub-sections (6) and (7) |
The difference between 50% and 200% turns entirely on whether the case falls in the sub-section (11) list, so the characterisation of the addition as misreporting rather than mere under-reporting is what the argument is usually about. The defences are in sub-section (8) and they are disclosure-based: a bona fide explanation with all material facts, or a self-made lower estimate on the same issue that was included in the computation and fully disclosed, keeps the amount out of under-reported income altogether — but sub-section (10) overrides sub-section (8) once misreporting is established. Two shields sit in sub-sections (13) and (13A): the same addition cannot be penalised twice in your case for any year, and from 1 April 2026 income on which additional income-tax has been paid under section 267(5)(ii) is out of penalty entirely. Note also that transfer pricing additions made in conformity with the Transfer Pricing Officer's arm's length price are excluded only if you maintained the section 171 documentation, declared the transaction under Chapter X and disclosed all material facts.
A company’s return is processed under section 270(1)(a) at Rs. 4 crore and it is assessed at Rs. 5 crore. The Rs. 1 crore difference is under-reported income under sub-section (2)(a), quantified by sub-section (3)(a)(i), and carries penalty at 50% of the tax on it under sub-section (9). If Rs. 30 lakh of the addition rests on expenditure the company could not substantiate by any evidence, that part is misreporting under sub-section (11)(c) and sub-section (10) raises the penalty on it to 200% — and the escape in sub-section (8) for a bona fide, fully disclosed explanation is unavailable there, because sub-section (10) applies irrespective of sub-section (8). Where instead the company had itself estimated a lower disallowance on the same issue, included it in its computation and disclosed all the material facts, sub-section (8)(c) keeps that amount out of under-reported income altogether.
In the penalty order in writing that sub-section (14) requires from the Competent Authority — the Assessing Officer, the Joint Commissioner (Appeals), the Commissioner (Appeals), the Commissioner or the Principal Commissioner — following the assessment or reassessment that produced the difference. Because the penalty is imposed during the course of a proceeding under the Act, the first sign of it is usually its initiation in that assessment, and the amount is arithmetic off the assessed figures rather than a discretion.
Irrespective of anything contained in sub-section (8) or (9), where under-reported income is in consequence of any misreporting thereof by any person, the penalty referred to in sub-section (1) shall be 200% of the tax payable on under-reported income.
| 1961 provision | What changed in the move |
|---|---|
| s.270A | 1. A seventh case of misreporting is added. Section 270A(9) listed six; s.439(11)(g) adds 'income referred to in section 195(1)(b)' - that is, the unexplained credits, investments, assets, expenditure and hundi borrowings taxed at the special rate. Such additions now attract the 200% charge as misreporting rather than the 50% charge, and the sub-section (8) defences are unavailable against them. 2. A defence is removed. S.270A(6)(e) excluded from under-reported income 'the amount of undisclosed income referred to in section 271AAB' - the search-penalty regime. There is no clause (e) in s.439(8); search cases are dealt with separately under the block assessment provisions. 3. The list of authorities is collapsed into a defined term, 'Competent Authority', in s.439(15)(a), covering the same five officers including the Joint Commissioner (Appeals). 4. The opening words change from 'may ... Direct that any person who has under-reported his income shall be liable to pay a penalty' to 'may ... Impose penalty on any person who has under-reported his income', with the order-in-writing requirement kept in s.439(14). 5. The mat and amt references are re-pointed from ss.115JB and 115JC to s.206(1) and (2), and the transfer pricing documentation reference from s.92D to s.171. 6. The rates, the seven under-reporting triggers, the measurement formulae and the bar on double penalty are unchanged. |
How we established this. Read s.439 of the 2025 Act against s.270A of the 1961 Act. The marginal headings are identical, 'Penalty for under-reporting and misreporting of income'. The seven situations in s.270A(2)(a) to (g) reappear as s.439(2)(a) to (g) in the same order and the same words, with s.270(1)(a) substituted for s.143(1)(a), s.280 for s.148 and s.206(1) and (2) for s.115JB and s.115JC. The measurement rules in s.270A(3)(i) and (ii) become s.439(3)(a) and (b) unchanged; the first proviso's formula (A minus B) plus (C minus D) with the same four definitions becomes s.439(4); the second proviso becomes s.439(5)(a); the Explanation (b) rule for loss cases becomes s.439(5)(b) and Explanation (a) 'preceding order' becomes s.439(15)(b). S.270A(4) and (5), on a receipt, deposit or investment sourced to an earlier year's addition, become s.439(6) and (7) word for word. The four defences in s.270A(6)(a) to (d) become s.439(8)(a) to (d), with s.171 substituted for s.92D. The rates are in the same two sub-sections in the same terms - 'fifty per cent of the amount of tax payable on under-reported income' becomes '50% of the tax payable on under-reported income', and 'two hundred per cent' becomes '200%', with the same overriding words. The tax computation in s.270A(10)(a), (b) and (c), including the X minus Y formula, becomes s.439(12). S.270A(11) becomes s.439(13) and s.270A(11A) becomes s.439(13A).
All of them are in the Rules 2026 index.
See the circulars index.
See the notifications index.