For many families, a child’s 18th birthday brings excitement and many questions. One of the biggest surprises is learning that, legally, your child becomes an adult at age 18, even if they continue to need significant support with everyday decisions. Parents no longer automatically have the legal authority to make medical, educational, financial, or other important decisions on their behalf simply because they have always done so.

This often leads families to ask:

“Do we need guardianship?”

The answer isn’t always straightforward. For some individuals, guardianship may provide important protections. For others, less restrictive options, such as Supported Decision-Making (SDM), may allow them to retain their legal rights while still receiving the support they need to make informed decisions. The right choice depends on the individual, not their diagnosis.

What Changes When Your Child Turns 18?

Once your child reaches adulthood, they generally gain the legal right to make their own decisions, including decisions related to:

• Medical care
• Education
• Financial matters
• Housing
• Employment
• Signing contracts
• Personal relationships

Even when parents remain deeply involved in supporting their adult child, the law recognizes the individual, not the parent, as the decision-maker unless another legal arrangement is in place. For many families, this is the first time they begin exploring options such as guardianship or Supported Decision-Making.

What Is Guardianship?

Guardianship is a legal process in which a court appoints another person to make some or all decisions for an adult who is determined to be unable to make certain decisions independently.

Depending on state law, guardianship may include decisions about:

• Medical care
• Living arrangements
• Finances
• Education
• Legal matters

Because guardianship removes some legal rights from the individual, courts generally view it as one of the most restrictive legal options available. For that reason, many courts now consider whether less restrictive alternatives could adequately meet the individual’s needs before granting guardianship.

What Is Supported Decision-Making?

Supported Decision-Making (SDM) is an alternative that allows individuals with disabilities to keep their legal decision-making rights while receiving support from trusted people.

Instead of making decisions for the individual, supporters help them:

• Understand information
• Explore options
• Weigh benefits and risks
• Communicate their decisions
• Carry out their choices

The individual remains the decision-maker.

Supported Decision-Making recognizes that many people make better decisions with support, and that needing assistance does not necessarily mean someone lacks the ability to make decisions. Many states now formally recognize Supported Decision-Making agreements, while others may use informal support networks or other legal tools. Availability and legal recognition vary by state.

Guardianship vs. Supported Decision-Making

Guardianship	Supported Decision-Making
Court ordered	Voluntary agreement
Some legal rights transfer to a guardian	An individual keeps legal rights
Guardian makes certain decisions	An individual makes decisions with support
Requires court involvement	Typically does not require court approval (varies by state)
More restrictive	Less restrictive
Court oversight	Flexible and individualized

Neither option is “better” for every person. The goal is to find the level of support that best matches the individual’s abilities and needs.

The Decision Should Be Based on Abilities, Not a Diagnosis

One of the most important things families can remember is that a diagnosis alone does not determine whether guardianship is necessary. Two individuals with the same diagnosis may have very different strengths, support needs, and decision-making abilities.

Instead of asking:

“My child has Down syndrome (or autism or an intellectual disability). Do they need guardianship?”

Try asking:

• Can they understand information when it’s explained in a way that works for them?
• Can they communicate their choices?
• Can they recognize when they need help?
• Can they identify trusted people to support them?
• What decisions do they already make successfully?
• Where do they benefit from additional support?

These questions often provide more meaningful guidance than focusing on a diagnosis alone.

Questions to Consider Before Pursuing Guardianship

Every individual is different, but families may want to consider:

• Does my loved one understand the choices they are making?
• Can they communicate preferences consistently?
• Can they recognize unsafe situations?
• Do they understand the consequences of major decisions?
• Are there trusted supporters already helping them make decisions?
• Could additional supports allow them to remain the primary decision-maker?

Thinking about strengths and support needs together can help identify the most appropriate path forward.

Guardianship Isn’t the Only Option

For some individuals, guardianship is the best choice. For others, combining several less restrictive tools may provide the support they need while preserving greater independence. Depending on your state and circumstances, alternatives may include:

• Supported Decision-Making agreements
• Health care powers of attorney
• Financial powers of attorney
• Representative Payee services for Social Security benefits
• Joint or supported banking arrangements
• ABLE accounts
• Special Needs Trusts

Each option serves a different purpose, and families often use more than one planning tool together.

Choosing the Least Restrictive Option

Modern disability planning increasingly emphasizes using the least restrictive option that still provides appropriate support. The goal is not simply to maximize protection. The goal is to balance safety, autonomy, dignity, and self-determination while recognizing each individual’s unique strengths and support needs. For some people, that balance may include guardianship. For others, it may involve Supported Decision-Making or other alternatives. Neither decision reflects a person’s worth or potential. Instead, it reflects the supports that will best help them live a safe, meaningful, and self-directed life.

Explore more: The National Resource Center for Supported Decision-Making provides free resources, state-specific information, and practical tools to help families understand and implement Supported Decision-Making.

There Is No One-Size-Fits-All Answer

Choosing whether to pursue guardianship is one of the most personal decisions many families make. There is no universal right answer. What matters most is carefully considering your loved one’s abilities, preferences, goals, and support needs,not simply their diagnosis or what another family chose. As your loved one grows and develops, their abilities and support needs may also change. The best planning decisions are those that respect both their safety and their right to participate in decisions about their own lives.

Turning 18 is an exciting milestone, but it also marks an important transition in legal adulthood. Taking time to understand your options, including guardianship, Supported Decision-Making, and other planning tools, can help your family make thoughtful decisions that promote both protection and independence.

At CaringTide, we believe every individual deserves the opportunity to participate in decisions about their own life to the greatest extent possible. By understanding the available options and focusing on each person’s unique strengths and support needs, families can create a plan that supports long-term success, dignity, and self-determination.

Disclaimer: This blog is for informational purposes only and is not legal advice. Guardianship and conservatorship laws, terminology, and court requirements vary by state and county. Families should confirm their specific obligations with their local court or consult a qualified attorney.