
When we sit down at the kitchen table with families, the conversation almost always turns to the future. It’s that "what happens when I’m gone?" question that keeps parents up at night. For families with a child who has supplemental needs, that question carries a lot more weight.
We all want to leave our children in the best possible position. We want them to be safe, comfortable, and cared for. But here is the tricky part: in the world of estate planning, sometimes a gesture meant to be generous can actually cause a lot of heartache.
If your child relies on government benefits like Supplemental Security Income (SSI) or Medicaid, those benefits are often tied to very strict rules about how much money they can actually "own." In many cases, if a person has more than $2,000 in countable assets, they lose their eligibility.
We see well-meaning families accidentally trigger these "benefit traps" all the time. To help you avoid the same pitfalls, we’ve put together a list of the seven most common inheritance mistakes that can accidentally disqualify a child from the support they need.
1. Leaving Assets Directly to Your Child
This is the most common mistake, and it usually comes from the simplest place: a standard will. Most people write their wills to say, "I leave everything to my children in equal shares."
While that sounds fair, if one of those children has supplemental needs and receives SSI, that inheritance is seen as a "countable resource." Even a relatively small inheritance, say $10,000, will immediately push them over the $2,000 limit. Social Security will stop their checks, and their Medicaid coverage could be suspended until that money is "spent down" on their care.
Basically, the inheritance you meant to help them with ends up just replacing the government benefits they were already receiving, leaving them no better off than they were before.
2. Forgetting About Beneficiary Designations
A lot of people think their will covers everything. Unfortunately, it doesn't. Things like life insurance policies, IRAs, 401(k)s, and even "Payable on Death" (POD) bank accounts operate outside of your will. They go directly to whoever is named on the beneficiary form.
If you name your child as a direct beneficiary on your $250,000 life insurance policy, that money will go straight to them when you pass away. Just like a direct inheritance in a will, this will immediately disqualify them from their benefits. We always remind our clients that estate planning is about looking at the whole picture, not just the will. You have to coordinate every single account to make sure the money flows into a protected trust instead of directly to the child.

3. The "Sibling Handshake" Agreement
Sometimes parents realize their child shouldn't have money in their own name, so they decide to leave that child’s share to a sibling instead. The idea is, "I’ll leave it all to my eldest daughter, and she’ll use it to take care of her brother."
We know this comes from a place of trust and love, but it is incredibly risky for a few reasons:
- Lawsuits and Creditors: If that sibling gets into a car accident and is sued, or if they run into financial trouble, your supplemental needs child’s "share" is legally the sibling's money. It can be seized by creditors.
- Divorce: If the sibling goes through a divorce, that money could be considered marital property and split with an ex-spouse.
- Life Happens: If the sibling passes away unexpectedly, that money goes to their heirs, who might not feel the same obligation to care for your child.
It puts an enormous burden on the sibling and offers zero legal protection for the child who actually needs the funds.
4. Using a "Plain Vanilla" Trust
Not all trusts are created equal. Many families already have a standard Revocable Living Trust (RLT). These are great tools for avoiding probate, but a standard RLT usually isn't designed to handle supplemental needs.
A typical trust might say that the kids get their money at age 25, or it might give the beneficiary the right to ask for money for their health, education, or maintenance. In the eyes of the Social Security Administration, if a beneficiary has the power to access the funds, those funds are "countable."
To protect benefits, you need a specific Supplemental Needs Trust (SNT). This is a "third-party" trust that is worded very specifically to ensure the money is used only to supplement government benefits, not replace them.
5. Giving Cash Gifts Directly from the Trust
Once a Supplemental Needs Trust is set up, the person in charge (the trustee) has to be very careful about how they spend the money.
A common mistake is for a trustee to give the child a cash allowance or a check to buy something they want.
Social Security counts cash as income. If the trust gives your child $500 in cash, their SSI check will likely be reduced dollar-for-dollar (after a small $20 exclusion). If the cash gift is large enough, it can stop the benefits entirely for that month.
Instead of cash, the trustee should pay for things directly. If the child needs new clothes, a computer, or a trip to see family, the trust should pay the store or the airline directly.

6. Paying for "Food and Shelter" the Wrong Way
This is one of the most frustrating rules in the book. SSI is specifically designed to pay for two things: food and shelter. If someone else (including a trust) pays for the child’s rent, mortgage, or groceries, Social Security considers this "In-Kind Support and Maintenance" (ISM).
When a trust pays for these specific things, the child’s SSI check is usually reduced by about one-third. Now, sometimes families decide that the reduction is worth it, maybe the child lives in a much nicer apartment than SSI could ever afford, but it’s a mistake to do this without knowing the consequences. We work with families to weigh the pros and cons of these payments so there are no surprises when the monthly check arrives.
7. Failing to Use a Pour-Over Will
Even the most carefully funded trust can miss something. Maybe you forgot about an old savings account, or you received a surprise inheritance yourself that didn't make it into the trust before you passed.
This is why we always recommend pairing a trust with a Pour-Over Will. Think of the trust as a box with no lid and the Pour-Over Will as a safety net. The Pour-Over Will says, "If I owned anything in my name alone when I died, 'pour' it into my trust."
Without this safety net, those "forgotten" assets would go through the regular probate process and might be distributed directly to your child based on state law, bringing us right back to Mistake #1. By using a Pour-Over Will, we make sure that everything stays protected within the framework of the Supplemental Needs Trust.

Protecting the Future, One Step at a Time
We know this feels like a lot of "rules." The legal landscape for supplemental needs planning is definitely complicated, but it’s manageable when you have a plan in place.
Our goal is to make sure your child is protected not just today, but for decades to come. Whether you are looking into guardianship as your child nears adulthood or you're ready to set up a comprehensive Supplemental Needs Trust, we are here to help you navigate the process.
If you're worried about how your current plan (or lack of one) might affect your child's future, please don't hesitate to reach out. We’d love to sit down with you, hear your story, and help you build a plan that gives you peace of mind.