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Income Taxes
 3 Months Ended
Aug. 31, 2023
Income Taxes

11. INCOME TAXES

Income tax expense was $160 during the three months ended August 31, 2023. Income tax expense was $1,450 during the three months three months ended August 31, 2022. The decrease in income tax expense in the first quarter of fiscal 2024 is primarily related to lower pre-tax income resulting from amortization and interest expense from the FSD transaction and a favorable tax rate differential on foreign earnings.

The total amounts of unrecognized tax benefits that, if recognized, would affect the effective tax rate as of August 31, 2023 and May 31, 2023 are $1,144 and $1,087, respectively. The increase in unrecognized tax benefits is primarily associated with the acquired 3M FSD, including positions for transfer pricing and research and development credits.