SUBSEQUENT EVENTS	6 Months Ended
Jun. 30, 2026
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS The Fund’s management has evaluated subsequent events through the date of issuance of the consolidated financial statements, and identified the following to report: In August 2026, MSC Income declared regular monthly dividends of $0.11 per share for each month of October, November and December 2026, or total regular monthly dividends of $0.33 per share for the fourth quarter of 2026, and a supplemental dividend of $0.03 per share, payable in December 2026, resulting in total dividends declared for the fourth quarter of 2026 of $0.36 per share. In August 2026, the Fund’s Board of Directors authorized a share repurchase plan pursuant to which the Fund may repurchase up to $20.0 million of shares of its common stock for a period beginning in September 2026 and ending in February 2027, at times when the market price per share of the common stock is trading below the most recently reported NAV per share of the common stock by certain pre-determined levels. Pursuant to such authorization, the Fund intends to enter into a share repurchase plan (the “Fund Rule 10b5-1 Stock Repurchase Plan”) to facilitate the repurchase of up to the full $20.0 million of shares of its common stock authorized under the share repurchase program. The repurchases of any shares pursuant to the Fund Rule 10b5-1 Stock Repurchase Plan will be implemented in accordance with Rule 10b5-1 and Rule 10b-18 under the Securities Exchange Act of 1934 (the “Exchange Act”). In August 2026, Main Street authorized a plan pursuant to which Main Street may purchase up to $20.0 million of shares of the Fund’s common stock in the open market during the same time period, pursuant to the terms of a share purchase plan (the “Main Street Rule 10b5-1 Stock Purchase Plan”) that Main Street intends to enter into in connection with the Fund Rule 10b5-1 Stock Repurchase Plan. The purchases of any shares pursuant to the Main Street Rule 10b5-1 Stock Purchase Plan will be implemented in accordance with Rule 10b5-1 and Rule 10b-18 under the Exchange Act. The terms and conditions of the Fund Rule 10b5-1 Stock Repurchase Plan and of the Main Street Rule 10b5-1 Purchase Plan will be substantially similar. Subject to the limitations under Rule 10b-18 under the Exchange Act and market conditions, the Fund expects that the aggregate amount of shares (i) repurchased under the Fund Rule 10b5-1 Stock Repurchase Plan and (ii) purchased under the Main Street Rule 10b5-1 Purchase Plan on any single trading day will be split among the Fund and Main Street on a pro rata basis (or as close thereto as reasonably possible) based upon the proportion of the aggregate $40.0 million repurchase/purchase commitment represented by the respective share repurchase/purchase program. There is no assurance that the Fund will repurchase or Main Street will purchase any shares of the Fund’s common stock at any specific discount levels or in any specific amounts under the Fund Rule 10b5-1 Stock Repurchase Plan or the Main Street Rule 10b5-1 Purchase Plan, as applicable. There is also no assurance that the market price of the Fund’s shares of common stock, either absolutely or relative to NAV per share, will increase as a result of any share repurchases/purchases, or that the Fund Rule 10b5-1 Stock Repurchase Plan or the Main Street Rule 10b5-1 Purchase Plan will enhance stockholder value over the long term.

In August 2026, MSC Income declared regular monthly dividends of $0.11 per share for each month of October, November and December 2026, or total regular monthly dividends of $0.33 per share for the fourth quarter of 2026, and a supplemental dividend of $0.03 per share, payable in December 2026, resulting in total dividends declared for the fourth quarter of 2026 of $0.36 per share.

In August 2026, the Fund’s Board of Directors authorized a share repurchase plan pursuant to which the Fund may repurchase up to $20.0 million of shares of its common stock for a period beginning in September 2026 and ending in February 2027, at times when the market price per share of the common stock is trading below the most recently reported NAV per share of the common stock by certain pre-determined levels. Pursuant to such authorization, the Fund intends to enter into a share repurchase plan (the “Fund Rule 10b5-1 Stock Repurchase Plan”) to facilitate the repurchase of up to the full $20.0 million of shares of its common stock authorized under the share repurchase program. The repurchases of any shares pursuant to the Fund Rule 10b5-1 Stock Repurchase Plan will be implemented in accordance with Rule 10b5-1 and Rule 10b-18 under the Securities Exchange Act of 1934 (the “Exchange Act”).

In August 2026, Main Street authorized a plan pursuant to which Main Street may purchase up to $20.0 million of shares of the Fund’s common stock in the open market during the same time period, pursuant to the terms of a share purchase plan (the “Main Street Rule 10b5-1 Stock Purchase Plan”) that Main Street intends to enter into in connection with the Fund Rule 10b5-1 Stock Repurchase Plan. The purchases of any shares pursuant to the Main Street Rule 10b5-1 Stock Purchase Plan will be implemented in accordance with Rule 10b5-1 and Rule 10b-18 under the Exchange Act.

The terms and conditions of the Fund Rule 10b5-1 Stock Repurchase Plan and of the Main Street Rule 10b5-1 Purchase Plan will be substantially similar. Subject to the limitations under Rule 10b-18 under the Exchange Act and market conditions, the Fund expects that the aggregate amount of shares (i) repurchased under the Fund Rule 10b5-1 Stock Repurchase Plan and (ii) purchased under the Main Street Rule 10b5-1 Purchase Plan on any single trading day will be split among the Fund and Main Street on a pro rata basis (or as close thereto as reasonably possible) based upon the proportion of the aggregate $40.0 million repurchase/purchase commitment represented by the respective share repurchase/purchase program. There is no assurance that the Fund will repurchase or Main Street will purchase any shares of the Fund’s common stock at any specific discount levels or in any specific amounts under the Fund Rule 10b5-1 Stock Repurchase Plan or the Main Street Rule 10b5-1 Purchase Plan, as applicable. There is also no assurance that the market price of the Fund’s shares of common stock, either absolutely or relative to NAV per share, will increase as a result of any share repurchases/purchases, or that the Fund Rule 10b5-1 Stock Repurchase Plan or the Main Street Rule 10b5-1 Purchase Plan will enhance stockholder value over the long term.