It’s late January in New York. A trustee for a family trust discovers that a portfolio asset unexpectedly paid out a large capital gain on December 30th. The trust’s tax year is closed, and that income is now trapped, destined to be taxed at the trust’s highly compressed rates—which climb much faster than individual rates. The beneficiaries, however, are in a lower tax bracket. It seems like a missed opportunity to distribute the income and lower the family’s overall tax burden. But the calendar year is over. What can be done?
For a prudent trustee, the year doesn’t always end on December 31st. A specific provision in the tax code gives trustees a brief window to look back and act. It’s a tool we often discuss with clients who serve as fiduciaries, as it directly impacts their duty of stewardship.
What the 65-Day Rule Actually Does
The “65-day rule” comes from Internal Revenue Code § 663(b) and applies to complex trusts. It allows a trustee to elect to treat distributions made within the first 65 days of a new tax year as if they were made on the last day of the prior year.
This is not a loophole. It is an administrative grace period. Trust accounting is often delayed, and final income figures may not be available until January or February. The rule gives a trustee the flexibility to make intentional decisions about income distribution after the final numbers are known.
By making this election, the trustee shifts the tax liability for that income from the trust to the beneficiary. If the beneficiary is in a lower tax bracket, the family saves money. The distribution appears on the beneficiary’s tax return for the prior year, and the trust takes a corresponding distribution deduction. This aligns tax strategy with the financial reality of the trust and its beneficiaries.
Fiduciary Duty and Prudent Tax Planning
In my practice, I find that many non-professional trustees—often a family member named to the role—focus heavily on managing investments and making distributions requested by beneficiaries. These are critical duties. But a trustee’s responsibility is broader. It encompasses the entirety of the trust’s administration, and that absolutely includes tax management.
A trustee has a fiduciary duty to act in the best interests of the beneficiaries. In New York, this standard of care is codified in laws like the Prudent Investor Act, found in EPTL § 11-2.3, which requires a trustee to “exercise reasonable care, skill and caution” in managing trust assets. While this statute focuses on investment strategy, its underlying principle of prudence extends to all aspects of financial stewardship. Minimizing tax erosion through legal and established means is a core component of that duty.
Ignoring a tool like the 65-day rule could be viewed as a failure to act prudently. If a trust pays substantially more in taxes than necessary because the trustee was unaware of this election, the beneficiaries have been financially harmed. This is why we work closely with the trustees and accountants for the trusts we represent—to ensure these strategic decisions are considered every single year.
When to Consider the Election
The decision to make the 65-day election is not automatic. It requires a deliberate analysis of several factors:
- Comparative Tax Brackets: The most obvious trigger is a significant difference between the trust’s marginal tax rate and the beneficiaries’ rates. Trusts can hit the top federal rate of 37% with very little income, while an individual has much more room.
- Trust Liquidity: The trustee must have the cash on hand to make the distribution. The election allows you to treat the distribution as if it happened last year—but the cash itself still has to leave the trust in the first 65 days of this year.
- Beneficiary Impact: How will the extra income affect the beneficiary? Will it push them into a higher tax bracket, impact their eligibility for credits, or affect college financial aid calculations? A trustee’s duty is to the beneficiary, so the net effect must be positive.
- Trust Document Terms: The trust instrument itself might contain specific language about distributions and the trustee’s discretion. The document always provides the foundational rules for the trustee’s actions.
An Irrevocable Decision
The 65-day rule election, once made for a tax year, is irrevocable. A trustee cannot change their mind in April if circumstances change. This requires careful calculation before checking the box on the trust’s income tax return, Form 1041.
This isn’t a strategy to be decided on a whim. It is a precise tool for fulfilling a trustee’s duty to protect and grow the assets entrusted to them. Stewardship. That is the job. It involves not just guarding the principal but also managing its growth and distribution in the most sensible and efficient way possible.
If you are serving as a trustee for a family trust and are uncertain about your administrative duties or tax-related responsibilities, the first step is to clarify them. We often begin by conducting a fiduciary review to analyze the trust documents and current practices against your legal obligations.




