Porter v. Commissioner
The Court ruled that bonds a man placed in trust for his children still counted as part of his taxable estate when he died, because he had kept the power to alter or modify the trusts at any time.
The decision confirms that federal estate tax law reaches property given away during life whenever the giver keeps meaningful control over how it is ultimately distributed, even without a full right to take the property back for himself.
How it got here: The Board of Tax Appeals and then a federal appeals court both sided with the tax collector, and the Supreme Court took the case because other appeals courts had ruled the opposite way.
The Case in Depth
What happened
A man created several trusts of bonds for the benefit of his children and grandchildren, keeping for himself the right to later alter or modify how the trust property would be distributed, though he could never redirect it back to himself or his own estate. After his death, the tax collector included the trust property in his taxable estate. His estate's representatives objected, arguing he had already given away all his ownership interest years before a law required such transfers to be taxed.
The question before the Court
If a man sets up trusts for his children but keeps the power to change how the money is split later, does that trust property count as part of his estate for tax purposes when he dies?
Why it matters
People who set up trusts but keep the right to change the terms cannot avoid estate taxes just because they gave up outright ownership. This case tells estate planners and wealthy families that reserving a power to rearrange beneficiaries — not just a power to reclaim the property — is enough to trigger tax at death.
What changes now
This was a final decision on the merits resolving a conflict among the federal appeals courts over how to read the estate tax statute's provision on retained powers to alter, amend, or revoke trusts. The estate's tax liability, as determined by including the trust property, stands. The ruling settled the question for later estate tax disputes involving similarly retained but limited powers.
What this does not decide
The Court noted it did not need to decide whether every possible change, however slight or trivial, to a trust would trigger the tax; it decided only that a broad, sweeping power to rework the entire trust arrangement was enough.
Concurrences and dissents
How the Justices voted
Majority (1). Justice Butler (author).
Separate writings (1). Justice Cardozo (author of a concurrence).
Concurrence — Justice Cardozo
Justice Cardozo agreed with the outcome that the trust property should be included in the taxable estate, but the opinion does not explain his separate reasoning; he is noted only as concurring in the result rather than joining the Court's full opinion. Read the full concurrence →
How the Court got there
The legal reasoning, step by step
- The Court read the estate tax statute's several categories of taxable property as independent bases for taxation, rejecting the estate's argument that a narrower provision covering only property the deceased owned at death limited a broader provision covering property whose enjoyment could still be changed by a retained power.
- The Court held that the retained power to alter or modify the trusts, even though it could never be exercised in the donor's own favor, was functionally similar to a general power of appointment by will and gave the donor continuing control over who would ultimately benefit from the property.
- The Court reasoned that the statute's use of the separate words 'alter,' 'modify,' and 'amend' -- rather than only 'revoke' -- showed Congress meant to reach any retained power to change the disposition of trust property, not just a full power to take it back.
- Because the donor kept the ability to completely rework the trusts until the moment of his death, the Court found no meaningful difference between his position and that of someone who could simply revoke the trusts outright, so the same tax treatment applied.
- The Court concluded that taxing this transfer did not violate due process, because the donor's death was the event that finally fixed the beneficiaries' rights and ended his control, making the arrangement a substitute for passing property by will.
Doctrinal impact
Cases affected by this decision
Distinguishes Reinecke v. Northern Trust Co. (278 U.S. 339)
Distinguished because in that case the donor's power required another person's consent, putting title beyond his sole control.
Distinguishes Burnet v. Guggenheim
Distinguished as involving an absolute revocable power taxed as a lifetime gift, unlike the limited alteration power here.