Home > Income Tax Act 2025 > Chapter IV > Section-45Last Updated: Apr 11th 2026
Section-45 provides for deduction of certain capital expenditure (other than cost of land) or revenue expenditure incurred for scientific research Learn to understand the section-45 as it is, it's help and useful links to follow.
Here onwards, "Act" refers to "Income Tax Act 2025"

incurred on scientific research related to the business of the assessee subject to provisions of this section.
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.
on in-house research and development facility as approved by the prescribed authority, subject to the conditions and manner, as may be prescribed.
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.
Quickly find the corresponding section under the new Income Tax Act, 2025.
Disclaimer: This article provides an overview and general guidance, not exhaustive for brevity. Please refer Income Tax Act, GST Act, Companies Act and other tax compliance acts, Rules, and Notifications for details.