A young couple I met with recently in our Manhattan office had just welcomed their first child. Their concern was direct: if something happened to both of them, how could they ensure their son’s inheritance would be protected and managed responsibly until he was an adult? They had a will, but they knew a simple bequest leaving everything to a toddler was not a workable plan. What they needed was a structure for long-term stewardship. This is one of the most common reasons we create a trust within a will.
This structure is known legally as a testamentary trust. Unlike a living trust, which you create and fund while you are alive, a testamentary trust is dormant. It is written into your will and only comes into existence after your death and after your will has been admitted to probate by the Surrogate’s Court.
The Purpose of a Testamentary Trust
For many families, a will’s primary function is to transfer assets. But for some, its greater purpose is to provide a framework for managing those assets for beneficiaries who need protection or guidance. A testamentary trust is the legal engine for that framework. It allows you, the testator, to appoint a trustee—a person or institution with a fiduciary duty to manage the assets—and set the rules for how and when the funds are used.
I see this instrument used most often in three situations:
- Caring for Minor Children. This was the situation for the young couple. A child cannot legally own or manage property directly. A testamentary trust appoints a custodian to hold and manage the inheritance for the child’s benefit—for education, health, and general well-being—until they reach an age you specify. You can even stage the distributions, such as one-third at age 25, one-third at 30, and the remainder at 35.
- Protecting a Beneficiary from Themselves. Sometimes an inheritance is a burden or a temptation. For an heir who struggles with financial management or addiction, a lump-sum inheritance can be destructive. A testamentary trust can be structured with “spendthrift” provisions, giving the trustee discretion over distributions to ensure the funds provide long-term support rather than fleeting indulgence.
- Providing for a Beneficiary with Special Needs. A carefully drafted testamentary trust, often called a Supplemental Needs Trust, can hold assets for a disabled individual without disqualifying them from essential government benefits like Medicaid or Supplemental Security Income (SSI). The trustee uses the funds to pay for supplemental expenses that enhance the beneficiary’s quality of life—things government aid does not cover.
The Critical Factor: Probate Is Unavoidable
Understand one critical point about a testamentary trust: it does not avoid probate. Because the trust is created by the will, the will itself must first be validated by the New York Surrogate’s Court. This is the probate process. Your executor’s first job is to file the will with the court, notify all interested parties, and get formal approval to act on behalf of the estate.
Only after the will is probated can the executor transfer the designated assets from the estate into the newly-formed trust. From that point on, the trustee you named takes over management. This court-supervised process provides a layer of oversight, ensuring the trustee is qualified and formally appointed. The court’s authority is significant. Under New York’s Surrogate’s Court Procedure Act § 707, for example, the court can disqualify a nominated trustee for several reasons, including being a felon or being unable to fulfill the duties of the office. This oversight is a benefit, but it also means the process is public record and can take months to complete.
This is the fundamental trade-off. A testamentary trust provides tremendous control over your legacy after you are gone, but it does so within the formal structure of the court system. A living trust, by contrast, is designed to bypass that system entirely.
Choosing Your Trustee Is Choosing Your Steward
The person or institution you name as trustee will have immense power and responsibility. They are bound by a fiduciary duty—the highest standard of care recognized by law—to act solely in the best interests of the beneficiaries. This is not a role to be assigned lightly.
You can name an individual, such as a trusted family member or friend, or a corporate trustee, like the trust department of a bank. An individual trustee knows your family dynamics but may lack investment experience or be susceptible to emotional pressure. A corporate trustee offers professional, impartial management and continuity, but comes at a higher cost and lacks a personal connection. For some of my clients, a combination of the two—a co-trustee arrangement—provides the right balance of personal insight and professional discipline.
Stewardship. That is what this decision is about. You are selecting the person who will execute your intentions, protect your beneficiaries, and serve as the custodian of your legacy for years—or even decades—to come.
If you are thinking about how to provide for your children or protect a vulnerable beneficiary, a good first step is to write down the rules you would want a trustee to follow. Consider the values you want to encourage and the outcomes you hope to achieve. We can then review those goals together to determine if a testamentary trust is the right instrument for your estate plan.
