The IRS has provided a limited waiver of the addition to tax under Code Sec. 6655 for underpayments of estimated income tax related to application of the corporate alternative minimum tax (CAMT), as amended by the Inflation Reduction Act (P.L. 117-169).

The Inflation Reduction Act added a new corporate AMT under Code Sec. 55, beginning after December 31, 2022, based on a corporation‘s adjusted financial statement income. Code Sec. 6655 generally requires corporations to pay estimated income taxes quarterly, with an addition to tax for failure to make sufficient and timely payments. The quarterly estimated tax payments must add up to 100 percent of the income tax due.

Estimated Taxes

The IRS waived the addition to tax under Code Sec. 6655 that is attributable to a corporation’s CAMT liability for the installment of estimated tax that is due on or before April 15, 2024, or May 15, 2024 (in the case of a fiscal year taxpayer with a taxable year beginning in February 2024). Accordingly, a corporate taxpayer’s required installment of estimated tax that is due on or before April 15, 2024, or on or before May 15, 2024 (in the case of a fiscal year taxpayer with a taxable year beginning in February 2024), need not include amounts attributable to its CAMT liability under Code Sec. 55 to prevent the imposition of an addition to tax under Code Sec. 6655. However, if a corporation fails to pay its CAMT liability, other Code sections may apply. For instance, additions to tax under Code Sec. 6651 could be imposed.

Instructions to Form 2220

The instructions to Form 2220, Underpayment of Estimated Tax by Corporations, will be modified to clarify that no addition to tax will be imposed under Code Sec. 6655 based on a corporation’s failure to make estimated tax payments of its CAMT liability for any covered CAMT year. Taxpayers may exclude such amounts when calculating the amount of its required annual payment on Form 2220. Affected taxpayers must still file Form 2220 with their income tax return, even if they owe no estimated tax penalty.

Applicability Date

The waiver of the addition to tax imposed by Code Sec. 6655 applies to the installment of estimated tax that is due on or before April 15, 2024, or on or before May 15, 2024 (in the case of a fiscal year taxpayer with a taxable year beginning in February 2024).