Treasury Regulations · 26 CFR
§ 1.6662-1. Overview of the accuracy-related penalty.
Regulation text, no changes From the eCFR, current as of October 15, 2026. The eCFR is an authoritative but unofficial editorial compilation of the Code of Federal Regulations; the official text is the annual CFR on govinfo. Compare it with this section on ecfr.gov (external site) or the official annual CFR on govinfo (external site).
Regulation under 26 U.S.C. § 6662
Cite as 26 CFR § 1.6662-1
At a glance
Read from the text and its source citation. Not part of the regulation.
- Status
- In the current eCFR
- Issued
- December 31, 1991 by T.D. 8381
- Last amended
- September 1, 1995 by T.D. 8617
- Issued under
- 26 U.S.C. § 6662
- Length
- 242 words · about 1 min to read
- Cross-references
- cites 1 Code section and 3 regulations; cited by 2
Section 6662 imposes an accuracy-related penalty on any portion of an underpayment of tax required to be shown on a return that is attributable to one or more of the following:
Sections 1.6662-1 through 1.6662-5 address only the first three components of the accuracy-related penalty, i.e., the penalties for negligence or disregard of rules or regulations, substantial understatements of income tax, and substantial (or gross) valuation misstatements under chapter 1. The penalties for disregard of rules or regulations and for a substantial understatement of income tax may be avoided by adequately disclosing certain information as provided in § 1.6662-3(c) and §§ 1.6662-4(e) and (f), respectively. The penalties for negligence and for a substantial (or gross) valuation misstatement under chapter 1 may not be avoided by disclosure. No accuracy-related penalty may be imposed on any portion of an underpayment if there was reasonable cause for, and the taxpayer acted in good faith with respect to, such portion. The reasonable cause and good faith exception to the accuracy-related penalty is set forth in § 1.6664-4.
[T.D. 8381, 56 FR 67498, Dec. 31, 1991, as amended by T.D. 8617, 60 FR 45664, Sept. 1, 1995]
Cross-references
Computed from the citations in the text of 26 CFR.
Code sections it cites
Regulations it cites
- § 1.6662-3 Negligence or disregard of rules or regulations.
- § 1.6662-4 Substantial understatement of income tax.
- § 1.6664-4 Reasonable cause and good faith exception to section 6662 penalties.
Cited by 2 other regulations
Amendment history
From the source citation at the end of the section, newest first. T.D. is a Treasury decision; FR is the Federal Register.
- Amended by T.D. 8617 (60 FR 45664)
- Issued by T.D. 8381 (56 FR 67498)
Where it sits in 26 CFR
- Subchapter A Income tax
- Part 1 Income taxes
- Additions to the tax, additional amounts, and assessable penalties
Nearby sections
- § 1.6655-6 Methods of accounting.
- § 1.6655-7 Addition to tax on account of excessive adjustment under section 6425.
- § 1.6655(e)-1 Time and manner for making election under the Omnibus Budget Reconciliation Act of 1993.
- § 1.6662-0 Table of contents.
- § 1.6662-1 Overview of the accuracy-related penalty.
- § 1.6662-2 Accuracy-related penalty.
- § 1.6662-3 Negligence or disregard of rules or regulations.
- § 1.6662-4 Substantial understatement of income tax.
- § 1.6662-5 Substantial and gross valuation misstatements under chapter 1.