# Treas. Reg. § 1.261-1: General rule for disallowance of deductions.

Source: eCFR as of 2026-10-19 <https://www.ecfr.gov/current/title-26/section-1.261-1>. Interprets 26 U.S.C. § 261.

In computing taxable income, no deduction shall be allowed, except as otherwise expressly provided in Chapter 1 of the Code, in respect of any of the items specified in Part IX (section 262 and following), Subchapter B, Chapter 1 of the Code, and the regulations thereunder.