IRS Revises Safe Harbor for Corporate Book-Tax Calculation (1)

June 2, 2025, 3:51 PM UTCUpdated: June 2, 2025, 5:05 PM UTC

The IRS said it would tweak a “safe harbor” formula that provides companies a simplified way to determine whether they are subject to the corporate minimum tax on book income.

The move, announced in an IRS notice Monday (Notice 2025-27), raises the income thresholds for companies to use the safe-harbor method for whether they must pay the corporate alternative minimum tax, which requires big, profitable companies to pay at least 15% in taxes on the income they record on their financial statements.

The revised safe harbor could allow more companies to determine that they don’t fall under CAMT ...

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