The Germantown Trust Co. v. Commissioner of Internal Revenue case in 1939 revolved around the issue of tax liability for a trust fund established by a deceased individual, Mr. Henry S. Jeanes, who left his estate to be used for charitable purposes after providing life income benefits to certain individuals named in his will. The question was whether the value of these life interests should be deducted from the gross estate before calculating federal taxes or not. The Supreme Court ruled that under Section 303(a)(3) of the Revenue Act of 1926, only those amounts "permanently set aside" for charity are deductible from an estate's gross value when determining its taxable net worth; temporary or contingent interests do not qualify as such deductions even if they eventually revert to charities. In this case, since part of Jeanes' donation was subject to potential use by non-charitable beneficiaries (the lifetime recipients), it could not be considered permanently set aside and thus wasn't eligible for deduction from the gross estate prior to taxation.

In the dissenting opinion for Germantown Trust Co. v. Commissioner of Internal Revenue, it was argued that the majority's interpretation of Section 23(k) of the Revenue Act was incorrect and overly restrictive. The dissenting justices believed that Congress intended to allow deductions for all reasonable expenses incurred in managing a trust, not just those related to income production as interpreted by the majority. They pointed out that trusts often have dual purposes - both preserving capital and producing income - and thus expenses related to either purpose should be deductible under Section 23(k). Furthermore, they contended that limiting deductions only to expenses associated with generating taxable income would unfairly penalize trustees who are legally obligated to manage trusts prudently and in accordance with their terms, which may require expenditures unrelated directly or indirectly towards making profits.