The legal capacity of minors is limited by design: anyone under the age of majority can enter contracts, own property, and in some circumstances consent to medical care, but the law treats their agreements as voidable, requires an adult to represent them in court, and only gradually hands over full control of their own affairs. The protections remain in place until the person reaches the age of majority in their state, at which point they assume adult legal responsibility.
When Minority Ends
The age of majority is 18 in 47 states and Washington, D.C. Alabama and Nebraska set it at 19, and Mississippi is the only state where it’s 21.1Interstate Commission for Juveniles. Age Matrix This is the age at which a person gains full legal standing to sign contracts, manage property, and make binding decisions without a parent’s involvement. It is distinct from the age thresholds for voting, driving, or purchasing alcohol, which are governed by separate laws and don’t automatically expand or restrict a minor’s capacity in other areas.
Contracts and the Infancy Doctrine
The infancy doctrine is the foundational rule. A minor can enter into a contract, but that contract is voidable at the minor’s option. The agreement isn’t void from the start — it exists and can be performed — but the minor holds a one-sided escape hatch. The adult on the other side cannot cancel; only the minor can.
To exercise the right, the minor must clearly communicate an intent to back out, whether by returning a purchased item, sending a written notice, or simply refusing to continue performing. There’s no single required procedure. The right generally must be used while the person is still a minor or within a reasonable time after reaching the age of majority. Wait too long, and a court may conclude the opportunity has passed.
Ratification After Turning 18
If a person reaches the age of majority and keeps performing under the contract — making payments, using the goods, or otherwise acting as though the deal is still on — courts treat that behavior as ratification. Ratification permanently eliminates the right to disaffirm, and the contract then carries the same weight as any adult agreement. If you turned 18 and kept making car payments for two months, you almost certainly ratified that contract.
Pausing the Clock on Legal Claims
Most states pause the statute of limitations on a minor’s legal claims until they reach the age of majority. If a 10-year-old is injured and the normal filing deadline would otherwise expire before they turn 18, the deadline is tolled during the period of minority. The exact extension varies by state, but it commonly gives the person one to three additional years after turning 18 to file suit.
Contracts That Still Bind a Minor
Several categories of agreement are enforceable despite the general rule.
Necessaries
Contracts for necessaries — food, clothing, shelter, and medical care — are enforceable against a minor, because without this exception vendors would have little incentive to deal with young people at all. The minor doesn’t owe the sticker price, though. Courts limit liability to the reasonable value of what was actually received, which prevents sellers from inflating prices. An item qualifies as a necessary only if the minor genuinely needs it and cannot obtain it through a parent or guardian. A teenager who already has adequate housing and clothing cannot invoke the doctrine to lock in a luxury apartment or designer wardrobe.
Federal Student Loans
Congress removed the infancy-doctrine defense for Federal Perkins Loans through the Higher Education Amendments of 1992, making those loan agreements enforceable regardless of the borrower’s age at signing.2Office of the Law Revision Counsel. 20 U.S. Code 1087dd – Terms of Loans A 17-year-old who signs a federal student loan cannot later disaffirm it the way they could disaffirm a gym membership.
Entertainment Contracts
Several states have “Coogan Laws” — named after child actor Jackie Coogan, whose parents spent nearly all his earnings — that make court-approved entertainment contracts binding on minor performers. These laws give studios enough certainty to invest in productions involving children and require employers to set aside a percentage of the minor’s earnings (commonly 15%) in a protected trust account that the minor can access upon reaching the age of majority.
Tort Liability
Contract law gives minors a significant shield. Tort law does not. A minor who injures someone or damages property can be sued for compensation just like an adult. The protection shows up in how courts measure fault, not whether minors face liability at all.
The Child Standard of Care
When a minor is accused of negligence, courts compare their behavior to what a reasonable child of similar age would have done in the same circumstances.3Legal Information Institute. Standard of Care A six-year-old isn’t expected to exercise the same caution as a teenager.
The Adult-Activity Exception
The age-adjusted standard disappears when a minor engages in an inherently adult activity like driving a car or operating a motorboat. If a 16-year-old causes a crash, the court applies the same rules of the road it would use for any licensed adult. This is where most minor-tort cases get expensive, because the damages from vehicle accidents tend to dwarf those from schoolyard incidents.
When Parents Pay
Parents don’t automatically owe money for every broken window, but almost every state has a parental responsibility statute that makes parents financially liable for intentional or willful property damage caused by their minor children. These statutes typically cap the parent’s exposure at a specific dollar amount. The caps vary enormously, from under $1,000 in some states to unlimited liability in a handful of others. Most states set their limits somewhere between $2,500 and $25,000.
Roughly a dozen states also recognize the family purpose doctrine, which holds a vehicle owner liable for accidents caused by family members using the family car. The owner doesn’t need to have given permission for the specific trip.
Medical and Healthcare Consent
Minors generally need parental consent for medical treatment, but several exceptions carve out space for independent decision-making, especially around sensitive health issues where requiring parental involvement might deter care.
The Mature Minor Doctrine
Some states allow older adolescents, typically those 14 and above, to consent to medical treatment if they can demonstrate sufficient maturity to understand the risks, benefits, and alternatives. Not every state applies this doctrine, and its scope varies considerably where it does exist.
Reproductive Health
Many states allow minors to independently consent to contraceptive services, STI testing and treatment, and prenatal care. Federal Title X grants fund family planning clinics that serve adolescents, and the program’s legislative mandates require grantees to encourage family participation in minors’ decisions about family planning services.4HHS Office of Population Affairs. Title X Statutes, Regulations, and Legislative Mandates Whether a clinic can serve a minor without parental consent depends heavily on state law.
Substance Abuse and Mental Health Treatment
Federal regulations create special privacy protections for minors who seek substance use disorder treatment. Under 42 CFR 2.14, when state law allows a minor to obtain treatment independently, only the minor can authorize disclosure of treatment records, including disclosures to a parent seeking insurance reimbursement. Where state law requires parental consent for treatment, both the minor and the parent must authorize any disclosure. A narrow safety exception allows program directors to contact a parent when a minor lacks the capacity for rational decision-making due to extreme youth or a mental or physical condition, and the situation poses a substantial threat to someone’s life or physical safety.5eCFR. 42 CFR 2.14 – Minor Patients
Digital Consent Under COPPA
The Children’s Online Privacy Protection Act requires website and app operators to obtain verifiable parental consent before collecting personal information from children under 13. A child under 13 cannot independently agree to terms of service that involve data collection. The parent must verify their identity and affirmatively opt in through methods like signing a consent form, providing credit card verification, or connecting with trained personnel by phone or video.6eCFR. 16 CFR Part 312 – Children’s Online Privacy Protection Rule
The FTC finalized significant updates to the rule in January 2025. Operators now need separate parental consent before sharing a child’s data with third parties for targeted advertising. The updated rule also limits how long operators can retain children’s personal information and expands the definition of “personal information” to include biometric identifiers like fingerprints and facial recognition data.7Federal Trade Commission. FTC Finalizes Changes to Children’s Privacy Rule
Children 13 and older fall outside COPPA’s federal protections and can generally agree to data collection terms on their own, though a growing number of states have begun enacting privacy laws specifically covering teenagers.
Suing and Being Sued
Minors cannot file or defend lawsuits on their own. Federal Rule of Civil Procedure 17(c) requires that a minor be represented in court by a general guardian, conservator, or similar fiduciary.8Legal Information Institute. Federal Rules of Civil Procedure Rule 17 – Plaintiff and Defendant; Capacity; Public Officers When no appointed representative exists, the minor can sue through a “next friend,” usually a parent or relative, who acts on the child’s behalf. If no one steps into that role, or if the existing representatives have conflicting interests, the court must appoint a guardian ad litem.
A guardian ad litem advocates for what the court determines is in the child’s best interest, which may not align with what the child personally wants. This distinction shows up frequently in custody disputes and injury cases where a parent’s financial interests might conflict with the child’s.
Owning and Managing Money
Minors can own property, including real estate, investments, and cash, but they face practical obstacles in managing it. Because financial accounts are contracts, and minors’ contracts are voidable, most institutions require adult involvement.
Bank Accounts
No federal law prohibits a minor from opening a savings account. However, because a deposit account relationship is a contract governed by state law, the voidable-contract problem creates risk for banks. In practice, most banks require a parent or custodian as a co-owner on a minor’s account. Whether a particular institution will open an account for a minor alone is a decision each bank makes in consultation with its own legal counsel.9U.S. Department of the Treasury. Guidance to Encourage Youth Savings and Address FAQs
Custodial Accounts
Adults who want to transfer assets to a minor commonly use custodial accounts established under the Uniform Transfers to Minors Act. A custodian manages the assets until the minor reaches the distribution age, which defaults to 21 in most states but can range from 18 to 25 depending on the jurisdiction and any terms the donor specified at the time of the transfer. Once the minor hits the distribution age, the custodian must hand over whatever remains in the account.
Gaining Adult Status Early Through Emancipation
Emancipation is the legal process by which a minor gains full adult status before reaching the age of majority. Once emancipated, the person can sign binding contracts, keep all of their own earnings, make independent medical decisions, and live where they choose. They also permanently lose the ability to use the infancy doctrine to escape agreements. Every lease, loan, and legal obligation carries the same weight it would for any other adult.
Courts grant emancipation when a minor demonstrates self-sufficiency and the court determines that emancipation serves the minor’s best interest. Judges consider factors like the minor’s age, physical and mental welfare, ability to support themselves financially, and whether their parents can provide basic necessities. Filing fees for emancipation petitions typically range from $0 to $350 depending on the jurisdiction.
Marriage and military enlistment also trigger emancipation in most states without requiring a court petition. In those situations, the law treats the new obligations as incompatible with continued parental control, and legal capacity expands automatically. Emancipation generally terminates a parent’s child support obligation, since it severs the legal dependency that child support is designed to address.