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If your child has a disability and relies on government benefits like SSI or Medicaid, you may have been told that leaving them an inheritance could be a problem. That concern is real — but it is not a reason to leave your child out of your estate plan. It is a reason to plan carefully.

A special needs trust, sometimes called a supplemental needs trust, is designed to do exactly what the name suggests: supplement the care and support that government programs provide, without replacing those programs or jeopardizing eligibility for them. Used correctly, it lets your child benefit from resources you leave behind while keeping the public benefits they depend on intact.

There are two distinct types of special needs trusts, and understanding the difference matters. This article explains both clearly.

The Approach That Seems Safe But Isn’t

Some parents of children with disabilities arrive at what feels like a practical solution: leave everything to their other children and disinherit the child with a disability. The reasoning tends to follow a familiar pattern — the child cannot manage money anyway, public benefits will cover their needs, and the other children will take care of their sibling if necessary.

Each part of this reasoning has a real problem. Public benefits programs are often inadequate on their own, and what is available today may not be available tomorrow — both programs and an individual’s circumstances change. Leaving money informally to a sibling to manage on behalf of a disabled family member places an unfair burden on that sibling and creates genuine ambiguity: is that money theirs, or does it belong to their sibling? When siblings disagree about that, or when one spends the money and another sets it aside, the result is often lasting family conflict. And of course, if that sibling dies, divorces, or faces a lawsuit, the funds may simply be gone.

A properly drafted special needs trust solves all of these problems at once. It holds funds specifically for the benefit of the child with the disability, managed by a trustee who has clear legal obligations and instructions, without affecting eligibility for benefits.

Why Benefits Eligibility Is So Easy to Accidentally Lose

Programs like Supplemental Security Income (SSI) and Medicaid are means-tested, meaning they are only available to people whose income and assets fall below certain thresholds. For SSI, the asset limit is just $2,000 for an individual. For Medicaid, limits vary by program but are similarly restrictive.

If a person with a disability receives a direct inheritance, a personal injury settlement, or even a well-intentioned gift that pushes them over those limits, they can lose their benefits immediately. Depending on the amount, that loss can last for months or years while the funds are spent down. And once benefits are disrupted, getting back on them is not always straightforward.

A properly drafted special needs trust sidesteps this problem. Because the trust, not the individual, holds the assets, those assets do not count toward the beneficiary’s resource limits. The trust can then be used to pay for things that improve quality of life without replacing what the government programs already cover.

The Two Types of Special Needs Trusts

There are two fundamentally different kinds of special needs trusts, and the right one depends on where the money is coming from.

Third-Party Special Needs Trusts

A third-party special needs trust is funded with money that belongs to someone other than the beneficiary. The most common scenario is a parent creating a trust as part of their estate plan, to receive the share of their estate that they want their child with a disability to inherit. It can also be funded with life insurance, gifts from grandparents, or contributions from other family members.

This is the trust that most families with a child with a disability need, and it is typically created as part of a broader estate plan. If you have a child who relies on benefits and you have not yet addressed this in your planning, this is the gap that matters most.

The critical advantage of a third-party SNT is what happens to the money that remains in the trust when the beneficiary dies. Those funds pass to whoever you named as remainder beneficiaries, which might be other children, grandchildren, a charity, or anyone else you choose. The state has no claim on those funds. There is no payback requirement.

Many parents with a child with a disability have a will that leaves everything equally to their children. That seems fair, but it can be a serious problem if a direct inheritance causes the child with the disability to lose their benefits. A third-party SNT in your estate plan directs that child’s share into the trust instead of to them outright, protecting both their inheritance and their eligibility. This is true even if the amount seems modest. A few thousand dollars can be enough to disrupt benefits.

First-Party Special Needs Trusts

A first-party special needs trust is funded with assets that already belong to the person with the disability. The most common situations involve a personal injury settlement, an inheritance that was received directly before a trust was in place, or accumulated savings from before a disability began.

The legal framework for first-party SNTs comes from federal law, specifically the rule sometimes called the “(d)(4)(A) trust” after the statute that authorizes it. To qualify, the beneficiary must be under age 65, and the trust must be established by the individual, a parent, a grandparent, a legal guardian, or a court.

First-party SNTs serve an important purpose: they allow someone to protect their own assets when benefits eligibility is already at stake. Without this tool, a person who receives a large personal injury settlement might face the choice of spending everything down to qualify for Medicaid, or losing access to the healthcare they need.

The significant trade-off is the Medicaid payback requirement. When the beneficiary dies, the state must be reimbursed for all Medicaid benefits paid on their behalf during their lifetime before any remaining funds can pass to anyone else. Whatever is left after that payback can go to chosen beneficiaries, but depending on how long and how much Medicaid paid, there may be little or nothing remaining.

What Happens to the Trust When Your Child Is Gone

For families using a third-party SNT, the answer is straightforward: whatever remains in the trust when the beneficiary dies passes to whoever you named as remainder beneficiaries. There is no state claim. The assets continue to benefit your family or the causes you care about.

For a first-party SNT, the Medicaid payback obligation comes first. The state files a claim for reimbursement of benefits paid during the beneficiary’s lifetime. If anything remains after that claim is satisfied, it passes to named remainder beneficiaries. For many beneficiaries with significant medical needs over a long lifetime, the payback can consume most or all of what is left.

This difference is one of the most important reasons why proactive planning with a third-party SNT, created before an inheritance passes, is so much more powerful than reactive planning after assets are already in the beneficiary’s hands.

How Much Is Enough? Funding the Trust Over Time

One of the most anxiety-inducing questions parents face is whether there will be enough money in the trust to support their child over a lifetime. The honest answer is that it is genuinely hard to project, because it depends on your child’s needs, the cost of services over time, and the availability of public programs that may change. When in doubt, erring on the side of more rather than less is almost always the right approach. The cost of services — including case management if you are no longer available — can be substantial, and you cannot count on current programs remaining exactly as they are.

One practical solution that works well for many families is life insurance. You might divide your estate equally among your children but use a life insurance policy to supplement the amount flowing into the special needs trust. Life insurance is especially efficient for this purpose: you can target exactly the amount you want the trust to receive, the payout is not subject to probate, and the younger and healthier you are when you start, the more affordable the premiums. For married couples, a survivorship policy — which pays out only when the second spouse dies — can provide substantial coverage at a lower cost than two separate policies, and it is designed precisely for this kind of long-horizon planning.

Planning Ahead Makes All the Difference

The families who navigate this best are the ones who plan before a crisis. If you have a child with a disability and you have not yet addressed what happens to their share of your estate, now is the time. An inheritance that lands in the wrong place, even briefly, can disrupt years of carefully maintained benefits eligibility.

Special needs planning is one of the most specialized areas of estate law, and it is the heart of what we do at Heritage Law Partners. We are members of the Academy of Special Needs Planners, and we work with families across the St. Louis area to build plans that protect both the person and the benefits they depend on.

The documents are important. But what matters most is whether the plan you build actually fits your child’s life, now and in the years to come.

Ready to build a plan that protects your child’s future?

Heritage Law Partners works with families throughout the St. Louis area from our offices in Chesterfield and Olivette. We offer consultations for families at every stage of special needs planning, from first-time trust creation to reviewing an existing plan and offering trustee guidance.

Schedule a consultation at heritagelawpartners.com or call (314) 325-9444.