The IRS has four rules that determine who counts as your dependent

A dependent is someone you support financially who meets four IRS tests: they must be a U.S. citizen, national, or resident alien; live with you for the entire year (with narrow exceptions); earn less than $4,700 in gross income in 2023; and be related to you or live with you as a member of your household under a valid local law. Not every family member you help pay for will meet all four. A dependent reduces your taxable income, which usually lowers your tax bill.

The most common dependents are children under 17 and adult relatives you support — parents, grandparents, siblings, aunts, uncles, or cousins. A spouse never counts as a dependent; you claim them on a joint return instead. Unrelated people who live with you can count only if your state allows it and you do not violate local laws by housing them.

Key Takeaways

  • Your dependent must live with you for the full year, earn under $4,700 in gross income, be a U.S. citizen or resident alien, and be related to you or legally allowed to live in your home.
  • Children under 17 you support are dependents; adult children over 24 must earn less than $4,700 to count.
  • You can claim a parent or grandparent as a dependent even if they live elsewhere, as long as they earn under $4,700 and you provide more than half their annual support.
  • If two people support the same person, only one can claim them as a dependent in that tax year; you must decide who claims them.
  • Claiming someone falsely as a dependent carries penalties of $500 per false claim plus interest and possible criminal charges.

Children and stepchildren you support

A biological child, stepchild, or adopted child counts as your dependent if they live with you the full year, are under 17 at the end of the tax year, and earn less than $4,700 in gross income. Children 17 and older can still be dependents if they meet the income and residency tests, but they do not lower your tax bill as much — they count as a dependent but not as a child tax credit, which applies only to children under 17.

If your child was born or died during the year, they still count as a dependent for that year. Temporary absences for school, medical treatment, or vacation do not break the "full year" rule. However, if your child lived with the other parent for part of the year, you cannot claim them unless you have a custody agreement stating you can.

Adult relatives: parents, grandparents, and siblings

You can claim a parent, grandparent, or sibling as a dependent even if they do not live with you, as long as you provide more than half their total support for the year and they earn under $4,700 in gross income. "Support" includes rent, food, utilities, medical care, and insurance. If your parent lives in a nursing home and you pay the bill, that counts as support you provide.

A parent or grandparent who lives with you must also be a U.S. citizen, national, or resident alien. If your parent is not a resident alien, you cannot claim them. Siblings must live with you the full year to count as dependents, unless they are your half-sibling or step-sibling — the same rules explore.

If you and a sibling both help support your parent, only one of you can claim them in a given year. You must decide between yourselves who will claim them. The IRS does not decide; if both of you claim the same parent, the IRS will disallow one claim and may assess penalties to both of you.

Unrelated people who live in your home

An unrelated person — a friend, roommate, or anyone not related by blood or marriage — can count as your dependent only if they live with you the full year, earn under $4,700, and your state law allows it. Some states prohibit this arrangement; others allow it. You must check your state's law before claiming an unrelated person.

Even if your state allows it, the person cannot be a relative of yours under any definition, and you cannot claim them if doing so would violate local laws. For example, some jurisdictions have rules about how many unrelated adults can live in one home. If your living arrangement breaks a local law, the IRS will not allow the dependent claim.

Income limits and what counts as income

Your dependent must earn less than $4,700 in gross income during the tax year. Gross income means wages, self-employment income, interest, dividends, and taxable scholarships. It does not include Social Security benefits (unless your dependent has other income and files a return), child support, or gifts.

If your dependent works part-time and earns $3,200, they are under the limit. If they earn $4,800, they exceed it and you cannot claim them. If your dependent is a student with a part-time job, track their W-2 or 1099 carefully — even a few hundred dollars over the limit disqualifies them.

Unearned income — money from investments, rental property, or a trust — also counts toward the $4,700 limit. A dependent who inherits money and receives $5,000 in interest that year exceeds the limit and cannot be claimed.

Citizenship and residency requirements

Your dependent must be a U.S. citizen, U.S. national, or resident alien. A resident alien is someone with a green card or who meets the substantial presence test (generally, living in the U.S. for at least 31 days in the current year and 183 days over three years). A non-resident alien — someone on a visa without green card status — cannot be your dependent.

If your dependent is a citizen of another country but has a green card, they count as a resident alien and can be claimed. If they are on a student visa (F-1) or work visa (H-1B) without a green card, they do not meet the residency test and cannot be claimed, even if they live with you and you support them fully.

When two people support the same person

If you and another person (a spouse, parent, or friend) together support someone, only one of you can claim them as a dependent in that tax year. You must decide who claims them. The person who claims them does not have to be the one who provides the most support — you can agree that either person claims them.

If both of you claim the same dependent, the IRS will catch it when processing returns and disallow one claim. The person whose return is processed second will have their dependent claim removed, and they may owe additional tax plus penalties. To avoid this, communicate with the other person before filing and agree in writing who will claim the dependent that year.

Frequently Asked Questions

Can I claim my adult child if they live with me but earn $5,000 a year?

No. The $4,700 gross income limit applies to all dependents, regardless of age. If your adult child earns $5,000, they exceed the limit and cannot be claimed, even if they live with you and you pay all their other expenses.

Can I claim my grandchild if they live with their parent but I pay for their school?

Only if your grandchild lives with you the full year. Paying for school does not count as providing more than half their support if they live elsewhere. The person they live with — usually a parent — is the one who can claim them.

What if my dependent is a green card holder but not a U.S. citizen?

A green card holder is a resident alien and can be claimed as your dependent. You will need their Individual Taxpayer Identification Number (ITIN) or Social Security number to claim them on your return.

Can I claim my ex-spouse's child if we share custody?

Only if you have a custody agreement stating you can claim them, or if you provide more than half their support and the other parent signs Form 8332 releasing their right to claim them. Without one of these, the parent with primary custody claims them.

What happens if I claim someone as a dependent and they are not actually my dependent?

The IRS will disallow the claim, and you will owe back taxes plus interest. If the IRS determines the claim was fraudulent rather than a mistake, you may face a penalty of $500 per false dependent claim and possible criminal charges for tax fraud.