Contracts with minors are almost always voidable, which means the person under the age of majority can cancel the deal while the adult on the other side is stuck with it. The age of majority is 18 in nearly every state, 19 in Alabama and Nebraska, and 21 in Mississippi. The law puts the risk on the adult because it assumes young people lack the experience to weigh a binding commitment. That default has real limits, though, and the exceptions are where most disputes actually happen.
Voidable Is Not Void
A void contract has no legal effect from the start. A voidable contract is valid and enforceable unless the protected party rejects it. When a minor signs, the agreement binds the adult right away but leaves the minor with an escape hatch they can use at any point during minority, and for some period after.
The practical result is lopsided. If the deal turns bad, the minor can back out. The adult generally cannot. That is why businesses that regularly deal with people under 18 build their paperwork around adult co-signers: a parent who co-signs takes on personal liability that survives the minor’s disaffirmance, which converts a shaky promise into an enforceable one.
How a Minor Cancels a Contract
The legal term for canceling is disaffirmance. A minor disaffirms by making the intent to reject the contract clear, in writing, out loud, or through conduct that is obviously inconsistent with honoring it. Returning the item to the seller works. There is no required script.
The window runs through minority and for a reasonable time after the minor’s birthday. What counts as reasonable depends on the type of contract, how long the now-adult has kept using the goods or benefits, and whether the delay hurt the other party. There is no bright-line deadline, which is exactly why an adult who suspects a former minor might cancel should watch what that person does in the months after they turn 18.
What Has to Be Returned
After disaffirming, the minor generally has to hand back whatever is still in their possession. This is the duty of restoration, and it exists so a minor cannot keep the goods and the refund both.
The harder question is damage. Under the majority rule, the minor only has to return what remains. A 17-year-old who buys a car for $5,000 and wrecks it can hand over the wreck and still recover the full payment. The seller absorbs the loss. Courts applying this rule reason that protecting minors from their own predictable bad judgment is the entire point of the doctrine, and charging them for wear and tear would drain the protection dry. A minority of states go the other way and require the minor to compensate the adult for the drop in value as a condition of walking away. Which side of that split your state falls on can change the outcome of a dispute entirely.
Ratification After Turning 18
Once a person reaches the age of majority, they can adopt a contract they signed earlier and permanently give up the right to cancel it. This is ratification, and it can be express or implied.
Express ratification is a plain statement, spoken or written, that the person intends to honor the deal. Implied ratification is more common and easier to trigger by accident. Continuing to make loan payments after turning 18, or keeping and using a purchased item for months past the birthday, signals acceptance through conduct. Sitting on the right to cancel for too long counts the same way. A person who wants out of a contract they signed as a minor should act quickly after their birthday, because every additional week of use or silence strengthens the argument that they already accepted it.
Contracts for Necessaries
The biggest exception to voidability covers necessaries: goods and services required for basic survival. Food, clothing, shelter, and medical care are the classic categories. A minor can technically disaffirm a contract for necessaries, but they still have to pay for what they actually received.
The mechanism is a quasi-contract. Instead of enforcing the original price, a court requires the minor to pay the reasonable value of what was consumed. A minor who rents an apartment owes fair market value for the time they lived there, which may not match the rent stated in the lease.
Whether a specific item counts as a necessary depends on the minor’s actual situation, not an abstract list. A winter coat qualifies. A designer jacket probably does not. Courts look at the minor’s existing standard of living and what parents or guardians already provide. An item that would be a luxury for a minor living at home can be a necessary for one living independently. The doctrine exists because if minors could cancel every purchase, no landlord, doctor, or grocer would deal with them, and the ones most in need of the market would be locked out of it.
When a Minor Lies About Their Age
A minor who claims to be an adult to sign a contract creates a genuine problem, and states resolve it differently. In some states, the minor is estopped from using their age as a defense, on the theory that no one should benefit from their own fraud. Other states reject estoppel entirely, reasoning that lying is exactly the kind of poor judgment the infancy protection was written for. A few states have specific statutes: Michigan, for instance, bars disaffirmance when the minor signed a separate document stating their age.
Even where the minor is allowed to disaffirm despite lying, the adult may have a separate claim for fraud. Damages in a fraud action are typically limited to the actual loss the adult suffered from the misrepresentation, not the full contract price. For any business, the safer move is to verify age through reliable identification rather than trusting the customer’s word.
Contracts That Bind Minors Anyway
Legislatures have carved out categories where letting minors cancel would cause serious problems. In these areas, statutes override the common law rule.
Federal Student Loans
The Higher Education Act, at 20 U.S.C. § 1091a(b)(2), bars minors from using the infancy defense to escape federal student loan obligations. A student under 18 who signs a promissory note for a federal loan is bound by it, with no co-signer required. A 17-year-old who borrows for college cannot later cancel the debt by pointing to their age at signing.
Entertainment and Sports Contracts
Several states allow courts to approve contracts for minors working as actors, musicians, athletes, or other performers. Once a court approves the deal, the minor cannot later disaffirm it on the basis of age, either during minority or after. These statutes usually require parental consent, cap the contract’s duration, and require a portion of the minor’s earnings to be set aside in a protected account.
Banking and Insurance
Many states have enacted laws that let minors open savings or deposit accounts and enter valid contracts with financial institutions for those accounts.1FFIEC BSA/AML. Guidance to Encourage Financial Institutions Youth Savings Programs and Address Related Frequently Asked Questions Without these statutes, an account agreement would be voidable, opening the door to deposits, withdrawals, and then disaffirmance. The rules are state-by-state, and financial institutions need to check local law before opening accounts for minors without an adult custodian. A number of states also let minors above a certain age enter binding insurance and annuity contracts, giving them the same rights as an adult over the policy. The age threshold varies but is typically 14 or 15.
Military Enlistment
Federal law allows 17-year-olds to enlist with parental consent. An enlistment by someone under 17 is void under 10 U.S.C. § 505, but a 17-year-old’s enlistment is valid. The parent or guardian has 90 days to apply for the service member’s separation; once that window closes, the enlistment stands.2Department of Defense. DoD Instruction 1332.14 Enlisted Administrative Separations
Emancipated Minors
An emancipated minor has been freed from parental control by court order, marriage, or another qualifying event. Emancipation generally grants the authority to enter contracts, manage finances, and participate in civil life as an adult would. In several states, marriage automatically removes the disabilities of minority.
Emancipation is not always total. Some states keep restrictions on specific contract types, particularly labor agreements, even for emancipated minors, and violating those restrictions can lead to revocation of the emancipation itself in certain jurisdictions. Anyone relying on emancipated status to enforce a contract should confirm what rights that status actually carries in the relevant state.
Digital Contracts, Apps, and In-Game Purchases
Online terms of service, app store agreements, and in-game purchase contracts are subject to the same rules as paper ones. A minor who clicks “I agree” can later disaffirm, and courts have held that a broad disaffirmance invalidates every provision inside the contract, including arbitration clauses, not just the parts the minor objects to.
Digital contracts create a practical problem with no clean answer. When a minor buys a physical item and cancels, they return the item. When a minor buys in-game currency or a digital download, they may have already consumed the entire value before disaffirming. There is nothing to hand back. Class actions against game developers and app platforms have flowed from exactly that gap. Courts still apply the traditional framework, but the distance between the rule and its consequences is wider in digital markets than anywhere else in contract law. Businesses selling digital goods to a young user base carry a risk most of them have not priced in.