Your parents can claim you as a dependent after 18, but only on one of two tracks: you’re a full-time student under 24, or your taxable income for the year stays under $5,200 for 2025.1Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information Either track also comes with support, residency, and filing conditions that have to line up. Here’s what each path requires and what it costs you on your own return.
The Student Path: Qualifying Child
This is the common one for anyone in college. You can be claimed as a qualifying child through age 23 if you’re enrolled as a full-time student, and through age 18 if you’re not.2Office of the Law Revision Counsel. 26 U.S.C. 152 – Dependent Defined Your income doesn’t matter on this path, which is what makes it powerful for students working part-time or over the summer.
Full-time means whatever your school defines as full-time, and you have to hit that status for at least part of five calendar months in the year. The months don’t have to run back-to-back, so a normal fall and spring schedule handles it even with the summer off.3IRS. Full-Time Student The school has to be a real one with a teaching staff, a curriculum, and enrolled students, which covers colleges, universities, vocational schools, and technical programs.
One boundary worth flagging: if you’re permanently and totally disabled, the age cutoffs don’t apply at all. A physical or mental condition expected to last at least 12 months or result in death removes the age test, though the other requirements still stand.4Internal Revenue Service. Dependents
The Low-Income Path: Qualifying Relative
If you’re too old for the student path or you’re not enrolled full-time, your parents can still claim you as a qualifying relative — but only if your taxable income stays below a hard cap. For 2025, that cap is $5,200, and the IRS adjusts it annually for inflation.1Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information
Gross income here means wages, interest, dividends, unemployment compensation, and taxable Social Security benefits added together. Cross the threshold by a dollar and the path closes, no matter how much your parents actually spent supporting you. Tax-exempt income doesn’t count against the cap, and a scholarship used for tuition generally sits outside it.
Who Paid for What: The Support Test
Both paths ask about support, but from opposite directions.
On the student path, the question is about you: you must not have provided more than half of your own support for the year. What your parents spent isn’t the focus — your resources are.
On the low-income path, the question flips to your parents: they must have provided more than half of your total support.1Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information
Total support covers food, housing, clothing, medical and dental care, transportation, recreation, and education. For housing, the IRS uses the fair rental value of the place you live in, not the mortgage payment, and adds a reasonable allowance for furniture, appliances, and utilities.1Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information
Two items behave in ways that surprise people:
- Scholarships received by a full-time student are excluded from the support calculation entirely. They don’t count as support you provided for yourself, which often helps parents clear the 50 percent line.1Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information
- Student loans in your name generally do count as support you provided, since you’re the one obligated to repay them. Take out enough loan money to cover a large share of your tuition and living costs and you can accidentally push yourself past the halfway mark, knocking your parents off the qualifying child path.
Do You Have to Live at Home?
On the student path, yes — technically. A qualifying child has to share the parent’s principal home for more than half the year.2Office of the Law Revision Counsel. 26 U.S.C. 152 – Dependent Defined But temporary absences count as time at home, and college is explicitly a temporary absence, along with military service, medical treatment, and vacation.5Internal Revenue Service. Qualifying Child Rules A student living in a dorm most of the year is treated as still living at home.
On the low-income path, an adult child doesn’t have to live with the parent at all. The parent-child relationship alone satisfies the residency rule, so a parent can claim an adult child living in a different city or state if the income and support tests are met.1Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information
Things That Can Still Block the Claim
Even when the age, income, support, and residency tests all pass, a couple of filing situations end the conversation.
If you’re married and file a joint return with your spouse, your parents generally can’t claim you. The narrow exception: you and your spouse filed only to get back withheld taxes, and neither of you would owe any tax on separate returns.4Internal Revenue Service. Dependents
And if your parents claim you, you can’t claim any dependents of your own. Someone claimed as a dependent is barred from claiming anyone else, which matters if you have a child of your own.4Internal Revenue Service. Dependents
What It Costs You on Your Own Return
Being claimed shrinks your standard deduction. For 2025, a dependent’s standard deduction is the greater of $1,350 or your earned income plus $450, capped at the regular standard deduction for your filing status.6Internal Revenue Service. Standard Deduction If you had little or no earned income, that’s a much smaller deduction than an independent filer gets.
You also give up any education credits on your own return. When your parents claim you, the American Opportunity Tax Credit (up to $2,500) and the Lifetime Learning Credit (up to $2,000) go to them, not you, for your qualified tuition and related expenses.7Internal Revenue Service. Education Credits – AOTC and LLC
On your parents’ side, claiming an adult child can bring in the $500 Credit for Other Dependents (nonrefundable, and phasing out above $200,000 of adjusted gross income, or $400,000 for joint filers), plus the education credits, plus potentially head of household filing status for an unmarried parent who pays more than half the cost of the household.8Internal Revenue Service. Child Tax Credit The Child Tax Credit itself is off the table once you turn 17.
Because the numbers pull in opposite directions on the two returns, the practical move is to run both returns both ways before filing. A college-age dependent often produces $3,000 or more in combined credits for the parents, which usually outweighs the reduced standard deduction and lost education credit on your side — but not always, and it’s worth checking with the actual figures for your year.