Income Tax Act
Explore the Income Tax Act, including important provisions, sections, amendments and related tax-law resources. EduTaxTuber explains key provisions in simple language and provides links to relevant rules, notifications, circulars and other income-tax resources. Because the Income-tax Act, 1961 has been repealed from 1 April 2026, readers should check which law applies to the relevant tax year or assessment period.
Important Sections
Income Tax Act, 2025
EDUTAXTUBER · LAW LIBRARY
Income-tax Act, 2025
Full legal text · Act 30 of 2025 · As amended by Finance Act, 2026
Official PDF pages 86–90
SOURCE PDF PAGE 86 ( c ) “long-term borrowings” means— ( i ) any moneys borrowed by the company from Government or Indus - trial Finance Corporation of India Limited or any other financial institution which is eligible for deduction under section 32( e ) or any banking institution (not being a financial institution referred to above); or ( ii ) any moneys borrowed or debt incurred by it in a foreign country in respect of the purchase outside India of capital plant and machinery, where the tenure of moneys borrowed or debt is not less than seven years. (6) If the assessee is a person, other than a company or a co-operative society, no deduction shall be admissible under sub-section (1) unless,— ( a ) the accounts of the assessee for the year or years in which the expend - iture specified in sub-section (2) is incurred have been audited by an accountant before the specified date referred to in section 63; and ( b ) the assessee furnishes for the first year in which the deduction under this section is claimed, the report of such audit by such date in such form duly signed and verified by such accountant and setting forth such particulars, as may be prescribed. (7) If an undertaking of Indian company entitled for deduction under sub-section (1) is transferred before expiry of five years specified in the said sub-section, in a scheme of amalgamation, to another Indian company, then— ( a ) no deduction under sub-section (1) shall be allowed to the amalgamating company for the tax year in which amalgamation takes place; and ( b ) all provisions of this section shall continue to apply to the amalgamated company as they would have applied to the amalgamating company, as if the amalgamation had not taken place. (8) If an undertaking of Indian company entitled for deduction under sub-section (1) is transferred before five years specified in the said sub-section, in a scheme of demerger to another company, then— ( a ) no deduction under sub-section (1) shall be allowed to the demerged company for the tax year in which demerger takes place; and ( b ) all provisions of this section shall continue to apply to the resulting company as they would have applied to the demerged company, as if the demerger had not taken place. (9) If a deduction under this section is claimed and allowed for any tax year in respect of any expenditure referred to in sub-section (2), deduction shall not be allowed for such expenditure under any other provision of this Act for the same or any other tax year. Expenditure on scientific research. 45. (1)( a ) A deduction shall be allowed for any expenditure, being in the nature of— ────────── SOURCE PDF PAGE 87 ( i ) capital expenditure, but not on acquisition of land which is acquired as such or as part of any property; or ( ii ) revenue expenditure, incurred on scientific research related to the business of the assessee subject to provisions of this section. ( b ) A deduction shall also be allowed under this sub-section in respect of the aggregate of expenditure (not being in the nature of capital expenditure), related to business, incurred on— ( i ) salary to an employee engaged in such scientific research; or ( ii ) purchase of materials used in such scientific research, where such expenditure is incurred within three years immediately preceding the commencement of business, to the extent certified by the prescribed authority as incurred on such research and such expenditure shall be deemed to have been incurred in the tax year in which the business is commenced. ( c ) For the purposes of this sub-section, the aggregate of capital expenditure incurred within three years immediately preceding the commencement of busi - ness shall be deemed to have been incurred in the tax year in which the business is commenced. (2)( i ) A deduction shall be allowed in respect of any expenditure on scientific research incurred (not being expenditure in the nature of cost of any land or build- ing) by a company engaged in the business of— ( A ) bio-technology; or ( B ) manufacture or production of any article or thing, which is not specified in Schedule XIII, on in-house research and development facility as approved by the prescribed authority, subject to the conditions and manner, as may be prescribed. ( ii ) No deduction shall be allowed under this sub-section to a company approved under sub-section (3)( b )( ii ). ( iii ) No deduction shall be allowed in respect of the expenditure mentioned in clause ( i ) under any other provision of this Act. ( iv ) The expenditure under clause ( i ) shall be allowed subject to such conditions and on furnishing of documents in such form and manner, as may be prescribed. ( v ) For the purposes of this sub-section, “expenditure on scientific research”, in relation to drugs and pharmaceuticals, shall include expenditure incurred on clini - cal drug trial, obtaining approval from any regulatory authority under any Central Act or State Act or Provincial Act and filing an application for a patent under the Patents Act, 1970 (39 of 1970). (3) A deduction shall be allowed for any sum, paid to— ( a ) ( i ) a research association having the object of undertaking scientific research or to a University, college or institution to be used for scientific research; or ( ii ) a research association having the object of undertaking research in social science or statistical research or to a University, college ────────── SOURCE PDF PAGE 88 or institution to be used for research in social science or statistical research; ( b ) a company which is— ( i ) registered in India having the main object of scientific research and development; and ( ii ) approved by such authority, for the purposes of this clause in such manner and subject to such conditions, as may be prescribed; ( c ) ( i ) a national laboratory; or ( ii ) a University; or ( iii ) an Indian Institute of Technology; or ( iv ) a specified person, with a specific direction that the said sum shall be used for scientific research undertaken under a programme approved in this behalf by the prescribed authority. (4) For the purposes of sub-section (3),— ( a ) the expenditure shall be allowed subject to such conditions and on fur - nishing of documents in such form and manner, as may be prescribed; and ( b ) in respect of clause ( a ) of the said sub-section, only such association, University, college or other institution shall be eligible for deduction, which for the time being is approved in the manner and subject to such conditions, as may be prescribed, and is specified by the Central Government, by notification. (5) The deduction for any sum under sub-section (3) shall not be denied merely on the ground that subsequent to the payment of such sum by the assessee, the approval granted to such entities or the programme undertaken by entities as mentioned in sub-section (3)( c ), has been withdrawn. (6) Where a deduction is allowed for any tax year under this section in respect of expenditure, represented wholly or partly by an asset, no deduction shall be allowed under section 33(3) for the same or any other tax year in respect of that asset. (7) The provisions of section 33(11) in respect of depreciation shall apply in relation to deductions allowable for capital expenditure under sub-section (1). (8) No deduction in respect of the sum mentioned in sub-section (3)( c ) shall be allowed under any other provision of this Act. (9) If any question arises under this section as to whether, and if so, to what extent any activity constitutes or constituted scientific research, or any asset is or was being used, for scientific research, the Board shall refer the question to— ( a ) the Central Government, when such question relates to any activity under sub-section (3)( a ), and its decision shall be final; ( b ) the prescribed authority, when such question relates to any other activity other than the activity specified in clause ( a ), whose decision shall be final. ────────── SOURCE PDF PAGE 89 (10) When an amalgamating company, in a scheme of amalgamation, sells or otherwise transfers to the amalgamated company (being an Indian company) any asset representing capital expenditure on scientific research, the provisions of this section shall apply to the amalgamated company as they would have applied to the amalgamating company if the latter had not so sold or otherwise transferred the asset. (11) For the purposes of this section,— ( a ) “National Laboratory” means a scientific laboratory functioning at the national level under the aegis of the Indian Council of Agricultural Research, the Indian Council of Medical Research, the Council of Scientific and Industrial Research, the Defence Research and Development Organi - sation, the Department of Electronics, the Department of Bio-Technology or the Department of Atomic Energy and which is approved as a National Laboratory by such authority and in such manner, as may be prescribed; ( b ) “salary” has the meaning assigned to it in section 16 read with section 18 subject to the following modifications: ( i ) in section 16, clauses ( e ) and ( j ) shall be omitted; ( ii ) in section 18, the references to “assessee” shall be construed as references to “employee of former employee” and the reference to “his employer or former employer” and “an employer or a former employer” shall be construed as reference to “the assessee”; ( c ) “specified person” means such person approved by the prescribed authority; and ( d ) “land”, for the purpose of sub-section (1)( a )( i ), includes any interest in land. Capital expenditure of specified business. 46. (1) An assessee, at his option, shall be allowed a deduction of the whole of the capital expenditure incurred, wholly and exclusively, for the purposes of any specified business carried on by him during the tax year in which such expenditure is incurred. (2) Where the expenditure referred to in sub-section (1) is incurred prior to the commencement of its operations and such expenditure is capitalised in the books of account as on the date of commencement of its operations, it shall be allowed during the tax year in which such business is commenced. (3) This section shall apply to the specified business fulfilling all of the following conditions:— ( a ) it is not set up by splitting up, or the reconstruction, of an already existing business; ( b ) it is not set up by the transfer of machinery or plant previously used for any purpose to the specified business; ( c ) if the business is of the nature referred to in sub-section (11)( d )( iii ) and such business— ────────── SOURCE PDF PAGE 90 ( i ) is owned by a company formed and registered in India under the Companies Act, 2013 (18 of 2013) or by a consortium of such com - panies or by an authority or a board or a corporation established or constituted under any Central Act or State Act; ( ii ) has been approved by the Petroleum and Natural Gas Regulatory Board established under section 3(1) of the Petroleum and Natural Gas Regulatory Board Act, 2006 (19 of 2006) and notified by the Central Government in this behalf; ( iii ) has made not less than such proportion of its total pipeline capacity as specified by regulations made by the Petroleum and Natural Gas Regulatory Board established under section 3(1) of the Petroleum and Natural Gas Regulatory Board Act, 2006 (19 of 2006) availa - ble for use on common carrier basis by any person other than the assessee or an associated person; and ( iv ) fulfils any other condition as may be prescribed; ( d ) if the business is of the nature referred to in sub-section (11)( d )( xiv ), such business,— ( i ) is owned by a company registered in India or by a consortium of such companies or by an authority or a board or corporation or any other body established or constituted under any Central Act or State Act; ( ii ) entity referred to in sub-clause ( i ) has entered into an agreement with the Central Government or a State Government or a local authority or any other statutory body for developing or operating and maintaining or developing, operating and maintaining a new infrastructure facility. (4) No deduction shall be allowed under the provisions of Chapter VIII-C in relation to such specified business for the same or any other tax year, if a deduction under sub-section (1) is claimed and allowed. (5) No deduction in respect of the expenditure referred to in sub-section (1) shall be allowed to the assessee under any other section in any tax year or under this section in any other tax year, if the deduction has been claimed and allowed to him under this section. (6) The provisions of this section shall apply to the specified business referred to in column B of the Table below if it commences its operations as specified in column C thereof.
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