# 26 U.S.C. § 261: General rule for disallowance of deductions

Source: OLRC release point 119-134 <https://uscode.house.gov/us/usc/119-134/t26/s261>. Cite pinpoints as 26 U.S.C. § 261(a)(1).

In computing taxable income no deduction shall in any case be allowed in respect of the items specified in this part.

## Regulations

- [Treas. Reg. § 1.261-1](/26/reg/1.261-1.md): General rule for disallowance of deductions. (interprets § 261)

## Leading cases

- [Commissioner v. Idaho Power Co., 418 U.S. 1 (1974)](https://www.courtlistener.com/opinion/109082/commissioner-v-idaho-power-co/)
- [Varian Medical Systems, Inc. and Subsidiaries v. Commissioner (T.C. 2024)](https://www.courtlistener.com/opinion/10072748/varian-medical-systems-inc-and-subsidiaries/)
- [Pacific Power & Light Co. v. United States, 644 F.2d 1358 (9th Cir. 1981)](https://www.courtlistener.com/opinion/388832/pacific-power-light-company-a-maine-corporation-v-united-states/)

## Connections

Cites: none

Cited by: § 211 Allowance of deductions

Derived from: 1939 § 24(a)

## Amendments

- 1954-08-16: [Act Aug. 16, 1954, ch. 736](/26/act/1954-ch736.md), 68A Stat. 76