Key Highlights

The IRS has issued Notice 2025-27 providing interim guidance under the Corporate Alternative Minimum Tax (CAMT) regime. This notice introduces an optional interim simplified method for determining whether a corporation qualifies as an “applicable corporation” subject to CAMT and provides a limited waiver of estimated tax additions under § 6655 for certain tax years. The guidance is relevant for tax years beginning after December 31, 2024, and before January 1, 2026.

Notable Provisions

• New Thresholds for Simplified Method: The interim method raises the thresholds to $800 million (from $500 million) for the general AFSI test and to $80 million (from $50 million) for members of foreign-parented multinational groups (FPMGs), easing the entry into CAMT compliance.
• Expanded AFSI Adjustments: Adjustments under § 56A(c) now include favorable considerations for energy credits, exempt income from credit transfers, and tax-exempt entity income.
• Flexibility for AFS Year-End: Corporations with financial statement periods not aligned with their tax year can use a three-AFS-year test instead of a three-taxable-year test for determining status.
• Waiver of Estimated Tax Penalty: For tax years beginning in 2025, the IRS will not impose the § 6655 addition to tax for underpayment of estimated CAMT liabilities. However, penalties under § 6651 for late payment of actual liability still apply.
• Form Filing Instructions: Affected corporations must file Form 2220 with their income tax returns, even if no penalty is due, to prevent automatic assessment notices.

Why This Matters

The introduction of the interim simplified method provides welcome administrative relief, especially for taxpayers whose AFSI falls between the earlier and revised thresholds. By incorporating broader AFSI adjustments, the notice aligns CAMT compliance with practical business realities, particularly for entities benefitting from energy credits and consolidated reporting. Furthermore, the estimated tax waiver mitigates exposure to penalties amid ongoing regulatory uncertainty, especially as final CAMT rules remain pending.

Treasury’s indication of additional interim guidance and reproposed regulations signals that the final regulatory framework is still evolving—taxpayers must stay engaged and consider submitting comments to shape forthcoming rules.

Next Steps

• Review CAMT applicability using the $800M/$80M thresholds under the interim simplified method.
• Evaluate eligibility for penalty relief under § 6655 for 2025 estimated tax underpayments.
• File Form 2220 with 2025 tax returns to reflect CAMT-related relief—even if no penalty is owed.
• Monitor further guidance expected from Treasury, including updated rules for partnerships, mark-to-market treatment, and CAMT interaction with specialized regimes, such as the tonnage tax.
• Engage with advisors to optimize CAMT positions and consider the strategic implications of optional reliance on simplified versus proposed regulatory methods.

For corporations with upcoming return filings or those close to AFSI thresholds, proactive analysis under the interim simplified method could result in significant compliance efficiencies.