More wealthy families are reconsidering a valuable but rigorous U.S. tax strategy, known as the "Lender model," which allows family offices to deduct investment expenses if they operate as a trade or business. This approach, which can generate significant savings, is gaining renewed interest after the "One Big Beautiful Bill Act" made the suspension of miscellaneous itemized deductions permanent. However, qualifying for the Lender model may draw IRS scrutiny and require family offices to reshape operations, hire more employees, and make decisions about ownership that can strain family relationships, according to lawyers and CPAs. Experts suggest at least $300 million in investable assets is generally needed to justify the required infrastructure.