When Your Child Turns 18: A Financial and Legal Planning Guide for Families

This guide is designed to help you prepare thoughtfully so that your child’s transition into adulthood feels empowering rather than overwhelming. It covers:

• The four core legal documents every young adult needs.
• The financial account transfers that happen — sometimes automatically — at ages 18 and 21.
• Practical strategies for building a college spending plan.
• Broader life skills that set the foundation for lasting financial confidence.

Important note: While this guide focuses on families with college-bound students, most of what follows applies to any young adult turning 18 or 21, whether they’re heading to a four-year university, entering the workforce, or exploring another path.

When your child is a minor, you have broad authority to act on their behalf in medical, financial, and academic matters. The day they turn 18, that legal authority ends unless they choose to extend it to you in writing.

Four documents address this change directly. Each one serves a distinct purpose, and together they create a foundation your child can build on for years to come.

1. Healthcare power of attorney (HC POA)

 A healthcare power of attorney — sometimes called a healthcare proxy or medical POA — designates a trusted person to make healthcare decisions on your child’s behalf if they’re incapacitated and cannot make those decisions.

This document matters most in serious situations: a car accident, a surgical complication, or any medical event that leaves your child unable to communicate. It’s important to understand that healthcare providers may have certain guidelines in place for discussions with patients, including those who are paying for their child’s health insurance. Without it, healthcare providers may be required to limit their discussions with you, even if you’re paying for your child’s health insurance.

Most states allow young adults to name both a primary and a backup agent. The document can also include general guidance about your child’s healthcare preferences, which many estate planning attorneys recommend pairing with a living will or advance directive.

What to do: Talk with an estate planning attorney in your home state. Requirements vary by state, and while many online templates are available, a brief consultation may offer you peace of mind that the document is properly executed. Or, if you don’t have an estate planning attorney, you can use a website such as Mama Bear Legal Forms where, for a fee, the company will complete the forms for you.

2. HIPAA authorization

Whereas a healthcare POA authorizes decisions, a HIPAA (Health Insurance Portability and Accountability Act) authorization releases information. These two documents complement each other and should both be in place.

Without a signed HIPAA authorization, healthcare providers cannot legally share your child’s medical information with you — not even to confirm whether they’re being treated. The authorization names specific people who may receive that information and can be as broad or narrow as your child chooses.

What to do: Most healthcare providers and hospital systems offer HIPAA authorization forms directly. Your child may also sign a more general form through either an estate planning attorney or a legal website that offers the service. Encourage your child to sign one for each regular healthcare provider they see, as well as a general form for emergencies.

It is important to understand that having a HIPAA authorization on file does not automatically guarantee that healthcare providers will share information with parents. Medical institutions vary widely in how they interpret and apply these releases.

Some college health centers, for example, handle medical and mental health information on a case-by-case basis and may require the student’s explicit, in-the-moment permission before speaking with a parent even when a signed HIPAA release is already on file.

3. Durable financial power of attorney (POA)

 A durable financial power of attorney authorizes a trusted person, typically a parent, to manage financial and legal matters if your child becomes incapacitated or temporarily unable to act on their own behalf.

This may include paying bills, managing bank accounts, handling tuition or housing payments, managing insurance claims, or dealing with landlords and service providers. The “durable” designation means it remains in effect even if your child becomes mentally incapacitated, which is precisely when it’s most needed.

What to do: Work with an estate planning attorney or a legal forms website to help ensure you have the right paperwork. The document should be executed according to your home state’s requirements, which typically include notarization and, in some states, witnessing.

4. FERPA waiver

The Family Educational Rights and Privacy Act (FERPA) is a federal law that protects the privacy of student education records. When a student turns 18 or enrolls in a postsecondary institution, whichever comes first, their academic records become solely their own.

This means colleges are legally prohibited from sharing grades, transcripts, disciplinary records, financial aid information, and even billing details with parents unless the student provides written consent. Many parents are surprised to learn this applies regardless of who is paying tuition.

A FERPA waiver is a written authorization — typically submitted through the college or university’s student portal — that permits the school to share designated information with named individuals. Most schools prompt students to complete this during orientation, though many students skip the step. 

While FERPA waivers give schools permission to share information, the scope of what is shared can still be subject to interpretation by the institution. Having these documents in place is an essential first step, but you should also have open conversations with your student so that both parties understand the practical limitations and know what to expect.

What to do: Before move-in day, confirm that your child’s college offers a FERPA release process. Most do. Discuss what level of access feels right for your family: grades only, billing and tuition as well, or all educational records. The student controls the scope. Talk to your student about completing the FERPA release process before they head to school and are too busy.

5. Will

Upon turning 18, your child becomes a legal adult and should consider establishing a basic will. Without one, the courts — not your child — may determine what happens to their assets, digital accounts, or personal belongings if something unexpected occurs. While the assets of most 18-year-olds may be modest, establishing this habit early creates a foundation that can be updated as their life and finances evolve.

What to do: Work with an estate planning attorney to prepare a simple will for your child. Many attorneys offer streamlined packages for young adults. Online legal services can also provide basic templates, though an attorney review is recommended to ensure the document is properly executed under your state’s requirements.

Legal documents address your authority to help in a crisis. Financial account transitions address something different: the irrevocable transfer of real assets to your young adult. Both require thoughtful preparation.

UTMA and UGMA custodial accounts

If you or a family member opened a Uniform Transfers to Minors Act (UTMA) or Uniform Gifts to Minors Act (UGMA) custodial account for your child, that account will transfer to them automatically when they reach the state’s “age of majority.” Age of majority is typically 18 or 21, depending on the state and how the account was established.

Unsure of which state age of majority you should consider? Generally, consider the age of majority in the state where the custodial account was established (opened). That’s the governing state for the account’s terms, including the age of majority that applies.

A few nuances worth knowing:

• The laws of the state where the custodian (usually a parent) resided or where the financial institution is located at the time of opening typically govern a custodial account.
• The original state’s rules generally still apply if the family moves to a different state after the account is created, since that’s the jurisdiction under which the account was set up.
• Some financial institutions may specify the governing state in the account agreement, which can resolve or clarify any ambiguity.

As a practical matter, if you’re unsure which state’s rules govern a specific account, the account agreement or the financial institution holding the account should be able to tell you.

This transfer is irrevocable, and no conditions, oversight requirements, or mechanism can delay the transfer. The assets — which may include cash, stocks, bonds, or other investments — become your child’s property entirely to use however they choose.

For families who may have significant assets in these accounts, the implications deserve careful consideration.

And while the goal of these accounts was likely to help fund future opportunities, a 21-year-old with sudden access to a large sum of money may not have had the financial understanding needed to steward it well.

What families can do before the transfer date

• Review the current balance and asset allocation in the account to understand what will transfer.
• Have an open conversation with your child about the account’s history, purpose, and the long-term thinking behind it.
• Consider whether any portion of the assets could be repositioned, for example, moving funds into a 529 plan with a matching state UTMA option can preserve some structure around education-related use.
• Engage a wealth advisor to coordinate the transfer within your family’s broader financial plan, particularly if the account holds appreciated securities.

Roth IRA transfers for young adults with earned income

If your child has a custodial Roth IRA that was opened because they had earned income from a job, that account also transitions out of custodian control when the child reaches adulthood, typically at age 18 or 21 depending on the state.

Because of the power of compounding over decades, even modest contributions made in a young person’s teens may grow substantially by retirement age.

The 2026 IRA contribution limit is $7,500, but contributions cannot exceed your child’s actual earned income for the year. For example, if your child earns $4,000 from a summer job, the maximum Roth IRA contribution for that year is $4,000.

When the account transitions out of custodianship, have a conversation about its purpose. Many young adults don’t fully understand what a Roth IRA is or why it matters. Helping them see the long-term value, and the cost of early withdrawal, may be one of the most important financial conversations you have.

A note on SECURE 2.0 and 529 plans: Under the SECURE 2.0 Act, up to $35,000 of unused 529 plan funds may be rolled over into a Roth IRA over a lifetime, provided the 529 account has been open for at least 15 years. This creates a new planning opportunity for families with excess college savings.

In addition, rollovers are subject to annual Roth IRA contribution limits and, critically, the annual rollover amount cannot exceed the student’s actual earned income for that year. For example, if your child earns $4,000 from a job in a given year, the maximum 529-to-Roth rollover permitted for that year is $4,000, regardless of how much is available in the 529.

Each family’s situation varies; working with a wealth advisor may help you determine whether this strategy makes sense for your circumstances.

Getting the legal documents in order and planning the account transitions are essential, but they’re only part of the picture. One of the most practical gifts you can give your college-bound child is a spending plan that functions before they ever set foot on campus.

Starting the conversation

The most effective college budgets begin with an honest conversation about who pays for what. Before move-in day, consider sitting down with your child to map out:

• What you’ll cover directly — tuition, housing, meal plan, health insurance, and travel home.
• What your child will manage — personal spending, entertainment, clothing, and incidentals.
• How funds will be delivered — monthly transfer, semester lump sum, or an allowance structure tied to demonstrated budgeting habits.

Clarity early prevents misalignment later, and it gives your child guidelines to work within rather than an open-ended expectation that money will appear when needed.

Building a realistic monthly budget

The College Board’s 2025-26 moderate nine-month living expense budget for U.S. students is approximately $27,140, or roughly $3,016 per month, covering housing, food, transportation, books, and personal items beyond tuition. That figure varies significantly by region and campus type, so it’s worth researching the specific cost of attendance at your child’s school. ¹

A useful framework for discretionary spending is the 50/30/20 rule: Allocate approximately 50% of available funds to needs (rent, food, transportation), 30% to wants (entertainment, dining out, social activities), and 20% to savings and future goals. For students with limited income, a zero-based budget — where every dollar is assigned a purpose at the start of the month — may be even more effective.

Weekly spending limits and trip-home costs

One practical strategy many families find effective is a weekly spending cap for discretionary items, separate from fixed expenses like housing and meal plans. A weekly limit builds rhythm into money management and prevents the front-loading problem where students spend heavily in the first weeks of a semester and struggle by the end.

Don’t forget to budget explicitly for travel home. Round-trip airfare, particularly for students attending school far from home, may cost several hundred dollars or more per trip. Planning for two to four trips per year — fall break, winter break, spring break, and the end of the school year — allows both you and your child to manage this cost without treating it as a surprise each time.

Building an emergency reserve

Even with a solid budget in place, unexpected costs arise. A minor medical expense, a lost or damaged item, or a sudden travel need can derail a carefully planned semester. Encourage your child to maintain a small emergency reserve — around $300 to $500. Suggest that they keep this savings separate from spending money so they aren’t tempted to dip into it.

The forms, the accounts, and the budget are all important. But the young adults who thrive financially in college and beyond tend to have something the paperwork can’t provide: a working set of life skills and a family that kept the conversation open.

Money management as a muscle

Unfortunately, financial knowledge isn’t taught in most schools. Your child will manage credit cards, pay rent, handle insurance, and navigate tax forms, most of it for the first time, in their first few years of independence. The habits they build before they leave your home may shape their financial lives for decades.

Some of the most durable money lessons come from doing, not just discussing. Consider giving your child a monthly stipend the summer before college and tying it to real expenses. Let them manage it with your guidance rather than your intervention. Running out of money in June is a far better lesson than running out in November.

Credit, banking, and digital money habits

Before leaving for school, make sure your child has a checking account in their own name and understands how to use it. Many families find that adding a child as an authorized user on a parent’s credit card or opening a secured card in the student’s name helps build a credit history responsibly while keeping spending visible.

Discuss the compounding cost of credit card debt honestly. A balance that isn’t paid in full each month grows, and that growth works against your child in a way that compounding in a Roth IRA works for them.

Health insurance, prescriptions, and medical self-management

When your child is on their own, they’ll need to manage their own health appointments, prescription refills, and insurance claims. Before your child leaves, confirm they know their insurance card information and how to use it.

Health insurance coverage at college

While students may remain on a parent’s health insurance plan until age 26, an important caveat exists: If the parent’s plan is an HMO or a network-restricted PPO, it may not provide adequate in-network coverage in the state where the college is located. Out-of-network care can be significantly more expensive, and in some cases, coverage may be limited to emergencies only.

If your child’s college is in a different state from your plan’s primary network, explore alternative options such as a college-sponsored student health plan or an ACA marketplace plan in the college’s state. Also note that most colleges and universities require students to show proof of health insurance coverage at enrollment; having documentation readily available will simplify that process.

Additional tips:

• Make sure any ongoing prescriptions are transferred to a pharmacy near your child’s school.
• Discuss your child’s rights regarding the campus health center and when to use it versus urgent care.

Dental and vision coverage

Health insurance is not the only coverage your college student needs to think about. Dental and vision plans are often separate from medical insurance, and many student-age dependents lose dental and vision coverage when they leave for school if those plans are not specifically extended.

Confirm whether your current dental and vision plans cover your child while they are away at college, particularly for in-network providers near the campus. If coverage is limited, explore whether the college offers a supplemental dental or vision plan.

Equally important: Make sure your student carries their own dental and vision insurance cards (physical or digital) and knows how to use them independently to schedule appointments and manage claims without your help.

Staying connected without taking over

One of the most nuanced parts of this transition is determining how involved you should remain in your child’s financial life. You want to be available to help without creating dependency. Regular but brief check-ins — a monthly “money conversation” rather than constant monitoring — may help your child feel supported while developing their own judgment.

When a child transitions to adulthood, it ripples through a family’s financial plan in more ways than the checklist captures. Your estate plan may need to be updated. Beneficiary designations on retirement accounts and insurance policies may warrant a review. Gift tax considerations may become relevant if you’re funding your child’s accounts generously.

These aren’t items to address in isolation. Coordinating your legal documents, your investment and gifting strategy, your cash flow plan for college costs, and your own retirement timeline is exactly the kind of comprehensive planning that may help your family avoid gaps and capitalize on opportunities.

Working with a wealth advisor who understands your full financial picture, not just the college savings column, may help you approach this transition with both confidence and clarity.

Your College Transition Checklist

Use this checklist as you prepare for your child’s 18th birthday and college transition. Each section corresponds to the relevant part of this guide. Print it, check items off as you go, and bring it to the next meeting with your wealth advisor.