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Notice 2023-63

SECTION 1. OVERVIEW

Internal Revenue Bulletin 2023-39 · 2026-10-03 edition · updated 2026-10-04 · United States

This notice announces that the Department of the Treasury (Treasury Department) and the Internal Revenue Service (IRS) intend to issue proposed regulations (forthcoming proposed regulations) addressing (1) the capitalization and amortization of specified research or experimental (SRE) expenditures under § 174 of the Internal Revenue Code (Code) 1, as amended by Public Law 11597, 131 Stat. 2054 (Dec. 22, 2017), commonly referred to as the Tax Cuts and Jobs Act (TCJA), (2) the treatment of SRE expenditures under § 460, and (3) the application of § 482 to cost sharing arrangements involving SRE expenditures. The Treasury Department and the IRS intend to propose rules in the forthcoming proposed regulations consistent with the interim guidance provided in sections 3 through 9 of this notice. Section 10 of this notice provides that taxpayers may rely on the interim guidance provided in sections 3 through 9 of this notice prior to the publication date of the forthcoming proposed regulations in the Federal Register. Section 11 of this notice requests comments, including comments on specific issues and issues not addressed in this notice.

The guidance in this notice does not apply for purposes of determining whether an expenditure paid or incurred for taxable years beginning before January 1, 2022, is a research or experimental expenditure under § 174 as in effect for taxable years beginning before January 1, 2022 (former § 174). This notice provides guidance regarding expenditures that are treated as SRE expenditures under § 174 and, therefore, affects expenditures that

may be treated as SRE expenditures for purposes of § 41(d)(1)(A) and § 1.41-4(a) (2)(i). However, this notice is not intended to change the rules for determining eligibility for or computation of the research credit under § 41 and the regulations thereunder, including rules for “research with respect to computer software,” and the definitions of “qualified research” and “qualified research expenses.”

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▸Contents — Internal Revenue Bulletin 2023-39

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