The Microbusiness Support Act proposes to amend the Small Business Act by creating a new direct loan program specifically for microbusinesses under the Small Business Administration (SBA). This program aims to provide financial assistance directly from the SBA, potentially through partnerships with third parties, to very small for-profit entities. A microbusiness is defined as an independently owned and operated for-profit business employing not more than 10 full-time equivalent employees. Additionally, its annual revenue must not exceed the lesser of $5,000,000 or the applicable industry size standard. The maximum loan amount available to these businesses under this program is set at $100,000 . The bill authorizes the SBA Administrator, or its authorized third parties, to impose and collect various fees from borrowers. These fees are intended to cover costs associated with referring applications, originating, underwriting, disbursing, servicing, or liquidating the loans. The Administrator is also directed to establish specific terms and conditions, including interest rates and repayment schedules, through interim final rules within 90 days of enactment.