The day a child turns 18, Texas treats them as a legal adult, with the right to make their own medical, financial, educational and living decisions. For most families, that is a milestone to celebrate. For New Braunfels and Comal County parents of a son or daughter with an intellectual, developmental or other significant disability, it can also be a deadline. A guardianship attorney can help you decide whether your child needs a guardianship, a lighter-touch alternative, or a combination, and can help you time the filing so there is no gap.
What Changes Legally at 18
Before 18, parents have authority simply because they are parents. After 18, that authority ends automatically, even if your child still depends on you for nearly everything. In practice, families often notice the change when:
- a doctor’s office or hospital stops sharing test results with you,
- the school’s ARD committee begins treating your child as the decision-maker on their own special education plan,
- a bank will not let you manage an account in your child’s name,
- your child is asked to sign a lease, a phone contract or medical consent forms they may not understand,
- Social Security reviews your child’s eligibility for SSI under the adult standards.
None of that means a guardianship is automatically needed. It does mean you should make a deliberate plan before the birthday instead of after a crisis.
Texas Lets You File Before the 18th Birthday
Texas allows a guardianship application for a minor who will need a guardian as an adult to be filed during the 180 days before the 18th birthday. The court can hold the hearing in advance, so the guardianship takes effect when your child turns 18.
A sample timeline for a child with a birthday next fall might look like this:
| Timing | What to do |
|---|---|
| 12 to 18 months before 18 | Talk with the school, doctors and your family about your child’s abilities and supports. Consider alternatives to guardianship. |
| 7 to 9 months before 18 | Gather school evaluations, medical records and benefit paperwork. Meet with a guardianship lawyer. |
| About 6 months before 18 | The 180-day window opens. Arrange the physician’s exam and file the application. |
| 3 to 5 months before 18 | The attorney ad litem meets your child. Notices and service are completed. |
| Before the birthday | Hearing. After 18, the guardian takes the oath, posts bond and receives letters. |
Your actual timeline depends on the court’s calendar and on whether anyone contests the case, so earlier is better.
The Medical Certificate and Its Timing
A physician must complete a Certificate of Medical Examination, generally based on an exam within 120 days before the application is filed. For young adults with an intellectual disability, the certificate addresses the diagnosis and, depending on the case, the court may need more specific testing or records from a qualified professional. Plan the doctor’s visit so it falls inside both windows. Our Certificate of Medical Examination page explains what the physician must cover.
Is Guardianship the Right Choice for Your Young Adult?
Texas courts must find that less restrictive alternatives and supports are not feasible before creating a guardianship (Tex. Est. Code § 1101.101). For many young adults, the honest answer lands somewhere in the middle.
When an alternative may be enough
If your child can understand, with help, what a document means and can express what they want, they may be able to sign:
- a supported decision-making agreement, which lets them choose trusted supporters to help them understand information and communicate decisions while keeping the final say,
- a medical power of attorney and a HIPAA release, so you can talk with doctors and step in if needed,
- a statutory durable power of attorney for financial matters.
Social Security can also appoint you as representative payee to manage SSI benefits, without any court case.
When guardianship may be needed
Guardianship is more likely to be necessary if your child cannot understand or sign these documents, is at risk of exploitation, has significant behavioral or medical needs that require consistent consent, or has already been pressured into contracts or relationships that put them in danger. Even then, a limited guardianship can leave your child with rights such as choosing friends, voting or making certain personal decisions.
Person, Estate or Both?
Most young adults with disabilities have few assets of their own, so many families ask only for a guardian of the person. If your child receives a settlement, an inheritance or significant savings, a guardianship of the estate or a special needs trust may also be needed. Money in your child’s name can affect need-based benefits, so that part of the plan deserves careful attention.
What This Looks Like for New Braunfels and Comal County Families
School transition
Comal ISD and New Braunfels ISD students in special education usually have transition planning built into their annual ARD meetings in the later high school years. Those meetings are a natural time to talk about decision-making after 18. School evaluations can also become helpful evidence about your child’s abilities and needs.
Where the case is filed
The application is filed in the county where your child lives. For most families in New Braunfels, Canyon Lake, Bulverde, Spring Branch and Garden Ridge, that is Comal County, where guardianship cases are heard in the county court system. Families on the Guadalupe County side of New Braunfels, or in Seguin, Schertz or Cibolo, may need to file in Guadalupe County.
Both parents as co-guardians
Married parents can ask to serve together as co-guardians, which many families prefer. Divorced parents can sometimes do the same if they communicate well. If your divorce decree already orders support after 18 for a disabled child, that order and the guardianship work side by side; they are separate cases with separate purposes.
Planning Beyond the Hearing
Parents often think of guardianship as a one-time event. It is not. As guardian, you will file an annual report with the court, renew your authority as required, and keep your child’s retained rights in mind. It is also wise to think about who will step in when you no longer can. You can name a successor in a written designation of guardian, and you can talk with siblings or relatives now about that future role.
Talk With a New Braunfels Guardianship Lawyer
If your child is 16 or 17 and you are not sure what comes next, now is a good time to start. Our team helps Comal County families compare guardianship with supported decision-making and other options, and we handle the filing timeline for you. We offer a free consultation by phone, video or in person, and we speak Spanish. Call (830) 302-4071.
Frequently Asked Questions
How early can I file for guardianship before my child turns 18?
Texas allows the application for an adult with a disability to be filed during the 180 days before the 18th birthday, so the guardianship can take effect at 18. Starting your planning several months before that window opens gives you time to gather medical and school records.
Can I still talk to my 18-year-old's doctors without a guardianship?
Only if your adult child agrees, for example by signing a HIPAA release or a medical power of attorney, or if you have legal authority through a guardianship. Without one of those, providers may decline to share information with you.
Will guardianship affect my child's SSI or Medicaid?
A guardianship by itself does not decide benefit eligibility. However, the guardian of the estate will need to manage benefits properly, and Social Security often appoints a representative payee separately. Ask about how any money in your child’s name could affect eligibility.
What if my child can make some decisions but not others?
That is exactly what a limited guardianship or a supported decision-making agreement is for. Texas courts prefer to leave a young adult with every right they can exercise, and the order can list the rights your child keeps.
Last reviewed November 13, 2026. General information only, not legal advice.