The "White House Conference on Small Business Act of 2025" reauthorizes the White House Conference on Small Business Authorization Act, updating the timeframe for the conference to occur between December 31, 2025, and December 1, 2026. This legislation aims to revitalize the conference's role in addressing the needs of small businesses by updating its operational framework and funding mechanisms. The reauthorization expands the conference's purpose to not only identify but also prioritize the problems impacting small businesses and to evaluate and recommend improvements for small business assistance programs offered by the Small Business Administration and other federal agencies. To participate in the National Conference, individuals must now be selected as delegates by a State conference and a regional meeting, and must be an owner, officer, or employee of a small business, with the delegate fee increasing from $10 to $200. The bill mandates the establishment of an electronic communication system for delegates to collaborate before, during, and for at least four years after the conference, facilitating problem definition, solution refinement, and monitoring of recommendations. Furthermore, it authorizes the Small Business Administration Administrator to sponsor or co-sponsor activities with eligible entities for small businesses, while prohibiting endorsements of products or services. Crucially, the conference's activities are to be funded exclusively through gifts, devises, and bequests from non-Federal sources, with no other federal appropriations authorized.