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Net Income Attributable to RMR Inc. (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Net Income Attributable to RMR Inc. |  |  |
Income before income tax expense | $ 64,448 | $ 149,539 | $ 90,701
RMR Inc. franchise tax expense and interest income | (885) | (755) | 568
Net income before noncontrolling interest | 63,563 | 148,784 | 91,269
Net income attributable to noncontrolling interest in The RMR Group LLC | (30,039) | (70,624) | (43,464)
Net loss attributable to noncontrolling interest in consolidated entity | 40 | 0 | 0
Net income attributable to RMR Inc. before income tax expense | 33,564 | 78,160 | 47,805
Income tax expense attributable to RMR Inc. | (11,319) | (21,768) | (13,233)
RMR Inc. franchise tax expense and interest income | 885 | 755 | (568)
Net income attributable to The RMR Group Inc. | $ 23,130 | $ 57,147 | $ 34,004

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