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DISCONTINUED OPERATIONS - Income (Loss) From Discontinued Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024
Operating expenses |  |  |  |
Net (loss) income from discontinued operations attributable to non-controlling interest | $ (99) | $ 2,063 | $ (175) | $ 3,831
Net (loss) income from discontinued operations attributable to i3 Verticals, Inc. | (227) | 3,587 | (365) | 7,570
Discontinued Operations, Held-for-Sale or Disposed of by Sale | Merchant Services Business |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Revenue | 0 | 36,574 | 0 | 73,510
Operating expenses |  |  |  |
Other costs of services | 0 | 16,477 | 0 | 32,786
Selling, general and administrative | 0 | 10,286 | 0 | 21,180
Depreciation and amortization | 0 | 2,876 | 0 | 5,561
Total operating expenses | 0 | 29,639 | 0 | 59,527
Income from operations | 0 | 6,935 | 0 | 13,983
Interest expense, net | 0 | 36 | 0 | 56
Other expense | 404 | 0 | 657 | 0
Total other expenses | 404 | 36 | 657 | 56
(Loss) income before income taxes from discontinued operations | (404) | 6,899 | (657) | 13,927
(Benefit from) provision for income taxes | (78) | 1,249 | (117) | 2,526
Net (loss) income from discontinued operations, net of income taxes | (326) | 5,650 | (540) | 11,401
Net (loss) income from discontinued operations attributable to non-controlling interest | (99) | 2,063 | (175) | 3,831
Net (loss) income from discontinued operations attributable to i3 Verticals, Inc. | $ (227) | $ 3,587 | $ (365) | $ 7,570

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