Compliance
Navigating the Corporate Alternative Minimum Tax: What Companies Need to Know Now
With new interim guidance released under the CAMT regime, corporations must adapt quickly to emerging compliance rules on fair value measurements, partnerships, and attribute reductions or face penalties.
By NomadicTax Research Team • 5-8 min read • November 18, 2025
## Background: What Is CAMT?
The Corporate Alternative Minimum Tax (CAMT), introduced by the Inflation Reduction Act of 2022, applies a 15% minimum tax on “adjusted financial statement income” (AFSI) of large corporations—those that exceed certain average income thresholds. ([irs.gov](https://www.irs.gov/inflation-reduction-act-of-2022/corporate-alternative-minimum-tax?utm_source=openai))
The purpose: ensure large profitable companies can’t use tax deductions to reduce federal taxes below a minimum level.
## Recent Interim Guidance Updates
### Simplified Method for Applicable Corporation Status
Notice 2025-27 offers a simplified route: corporations may now use interim thresholds of **$800 million AFSI** and **$80 million second-prong test**, rather than the higher amounts prescribed earlier. ([irs.gov](https://www.irs.gov/irb/2025-26_IRB?utm_source=openai))
### Treatment of Partnership Income & Fair-Value Items
Notice 2025-28 addresses how AFSI should reflect partnership investments and dis- or contributions; provides relief on compliance burdens related to fair standard accounting measures. ([irs.gov](https://www.irs.gov/irb/2025-34_IRB?utm_source=openai))
### Troubled and Insolvent Companies
Notice 2025-46 gives interim guidance for insolvent companies or those undergoing Title-11 bankruptcy. It explains when discharge of indebtedness is recognized for tax and how attribute reductions apply. ([irs.gov](https://www.irs.gov/irb/2025-43_IRB?utm_source=openai))
## What Companies Should Be Doing Now
- **Evaluate Income Statements**: Identify items measured at fair value under financial accounting that are not recognized under regular tax rules—digital asset holdings, derivatives, trading securities. These may be adjusted under interim guidance. ([irs.gov](https://www.irs.gov/irb/2025-44_IRB?utm_source=openai))
- **Partnership Flows**: If you are investing through partnerships—or are a CAMT entity partner—your entity must review contributions, distributions, and partnership reporting. ■ Notices say deferred gains must ultimately be included in AFSI.([irs.gov](https://www.irs.gov/irb/2025-34_IRB?utm_source=openai))
- **Statement of Reliance on Guidance**: For Form 4626, corporations must attach statements describing which interim guidance or methodologies (simplified test, etc.) were relied upon. Omitting this may trigger penalties.([irs.gov](https://www.irs.gov/irb/2025-44_IRB?utm_source=openai))
## Example Scenario
_A company “TechCo Inc.” has an average financial statement income of $850 million in recent years. Under original thresholds TechCo would be subject to CAMT; under interim guidance using $800 million threshold, it remains applicable only if other prong is met._
_TechCo also holds significant trading securities and some crypto assets recognized at fair value. Under interim guidance in section 5 of Notice 2025-49, gains from unrealized fair‐value changes in such assets **may** be excluded if certain elections (FVI exclusion or hedge coordination) are properly made.([irs.gov](https://www.irs.gov/irb/2025-44_IRB?utm_source=openai))_
## Risks of Non-Compliance
- Improper reporting could trigger **additions to tax under § 6655** for underpayment of estimated taxes, though temporary waiver applies for years ending before January 1, 2026.([irs.gov](https://www.irs.gov/irb/2025-26_IRB?utm_source=openai))
- Failure to include required statements on Form 4626 may lead to disallowed reliance and penalties.
## Actionable Next Steps
1. Conduct an internal audit to see whether your income, investments, and assets fall under CAMT exposure.
2. Choose methodology — simplified or full method — and officially document that choice.
3. Evaluate the benefit of making elections (like the FVI exclusion) before deadlines.
4. Engage external tax advisors or auditors to review partnership agreements for reporting obligations.
5. If required, update systems to track unrealized gains on fair-value assets for financial statements, even if regular tax doesn’t recognize them yet.
## Conclusion
The rules surrounding CAMT are still evolving. Companies need to stay vigilant, ensure they meet the interim requirements if applying them, document methodologies, and make elections properly. Doing so can help minimize risk and surprise expenses when final regulations arrive.