Income-tax Act, 1961 · Chapter IV: Computation of Total Income · D.—Profits and gains of business or profession
Section 35AB: Expenditure on know-how
The Income-tax Act, 1961 was repealed by the Income-tax Act, 2025 from 1 April 2026. The text is kept here because the judgments below apply it.
(1) Subject to the provisions of sub-section (2), where the assessee has paid [in any previous year relevant to the assessment year commencing on or before the 1st day of April, 1998] any lump sum consideration for acquiring any know-how for use for the purposes of his business, one-sixth of the amount so paid shall be deducted in computing the profits and gains of the business for that previous year, and the balance amount shall be deducted in equal instalments for each of the five immediately succeeding previous years.
(2) Where the know-how referred to in sub-section (1) is developed in a laboratory, university or institution referred to in sub-section (2B) of section 32A, one-third of the said lump sum consideration paid in the previous year by the assessee shall be deducted in computing the profits and gains of the business for that year, and the balance amount shall be deducted in equal instalments for each of the two immediately succeeding previous years. [(3) Where there is a transfer of an undertaking under a scheme of amalgamation or demerger and the amalgamating or the demerged company is entitled to a deduction under this section, then, the amalgamated company or the resulting company, as the case may be, shall be entitled to claim deduction under this section in respect of such undertaking to the same extent and in respect of the residual period as it would have been allowable to the amalgamating company or the demerged company, as the case may be, had such amalgamation or demerger not taken place.]
Explanation.—For the purposes of this section, —know-how‖ means any industrial information or technique likely to assist in the manufacture or processing of goods or in the working of a mine, oil well or other sources of mineral deposits (including the searching for, discovery or testing of deposits or the winning of access thereto).]
Source: India Code (Legislative Department), the text of the Act as it stood before its repeal. Words in square brackets [ ] were inserted or substituted by later amending Acts, and *** marks words omitted by an amendment. The amendment footnotes are not reproduced here. Official text on India Code.
Supreme Court judgments citing the section 35AB
No Supreme Court judgment in our database cites this section yet.