You can claim your girlfriend as a dependent on your taxes, but only if she meets every test the IRS sets for a non-relative living in your home: she has to live with you the entire year, earn less than the annual gross income limit, get more than half her support from you, meet citizenship or residency rules, and not be filing a joint return with a spouse. Clear all of that and you get a $500 nonrefundable credit. Miss one test and the claim fails entirely.
The Five Tests She Has to Pass
The IRS lets you claim a non-relative as a “qualifying relative” through a catch-all in the statute: any individual who lives with you all year as a member of your household, provided they aren’t your spouse and the other tests are met.1Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined The label is misleading. She doesn’t have to be related to you. But every one of the following has to be true.
She Lived With You All Year
The full calendar year, as a member of your household. Not most of the year. Not since summer.2Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information If she moved in during March, she doesn’t qualify for that tax year no matter how well she meets everything else.
Temporary absences don’t break the requirement. Visits to family, school, medical care, or vacation still count as time living with you, as long as she intends to return and hasn’t established a separate household.
Her Gross Income Was Under the Limit
Her gross income for the year has to fall below a threshold the IRS adjusts annually. For 2025 returns, that limit is $5,050.3Internal Revenue Service. Dependents Gross income means taxable income before deductions: wages, freelance earnings, interest, rental income, and similar sources. Tax-exempt income like certain Social Security benefits or municipal bond interest generally doesn’t count. A dollar over the threshold kills the claim.
You Paid More Than Half Her Support
You have to provide more than half of her total support for the year. The IRS reads support broadly: housing, food, clothing, medical and dental care, education, transportation, and recreation.4Internal Revenue Service. Understanding Taxes – Support Government benefits she receives, like food assistance or subsidized housing, count too. They just count as support from another source rather than from you.
Housing is usually the biggest number in the calculation. The IRS uses fair rental value, not your actual mortgage or rent. If she lives in your home rent-free, the fair market rent for her share counts as support you provided. Add up everything she received from every source, including her own income, help from her family, and any government programs, then compare your contribution to that total. Your share has to exceed 50 percent.
She Isn’t Filing a Joint Return
If she’s married and files a joint return with her spouse, she generally can’t be your dependent. There’s a narrow exception when the joint return is filed only to claim a refund and neither spouse would owe tax on separate returns.1Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined For most unmarried couples this test never comes up.
She Meets the Citizenship or Residency Rule
She has to be a U.S. citizen, U.S. national, U.S. resident alien, or a resident of Canada or Mexico. Someone here on a temporary visa who hasn’t met the substantial presence test for resident alien status won’t qualify.1Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined
The Local Law Condition
There is one more requirement the IRS applies to a non-relative in your household: the arrangement can’t violate local law. If your state or locality makes your cohabitation illegal, she can’t qualify as your dependent even if every other test is met. Mississippi is the last state with a cohabitation statute still on the books, and enforcement is essentially nonexistent. In every other state this is unlikely to matter, but the rule exists.
What You Get: A $500 Credit
Claiming her gets you the Credit for Other Dependents, worth up to $500 for each qualifying dependent who isn’t eligible for the Child Tax Credit.5Internal Revenue Service. Understanding the Credit for Other Dependents A girlfriend falls into this category. The credit is nonrefundable, so it can reduce your tax bill to zero but won’t produce a refund on its own. You claim it on Schedule 8812 with your Form 1040.6Internal Revenue Service. About Schedule 8812 (Form 1040), Credits for Qualifying Children and Other Dependents
The credit phases out once your adjusted gross income exceeds $200,000, or $400,000 if you’re married filing jointly.7Internal Revenue Service. Parents – Check Eligibility for the Credit for Other Dependents Those thresholds are not indexed for inflation.
Head of Household Does Not Follow
This one catches people. Even when your girlfriend qualifies as your dependent, she does not make you eligible for head of household filing status. That status requires a qualifying person related to you in specific ways: a child, parent, sibling, or certain other relatives. A dependent who qualifies only because they lived with you all year is explicitly excluded.2Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information You’ll file as single unless another dependent or circumstance gets you there.
What It Does to Her Return
Once you claim her, she can’t claim any dependents of her own for that year, and no one else can claim her either.1Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined She can still file her own return, and often should if she had tax withheld from wages, but she has to indicate that someone else can claim her as a dependent. That limits her standard deduction below what an independent filer would get, and it can affect certain credits.
Talk it through before you file. The $500 credit on your return may or may not be worth the tradeoffs on hers.
Records to Keep
The IRS doesn’t ask for proof when you file, but it can challenge the claim later, and it does audit non-relative dependent claims. Form 14815 lists the kinds of documentation the IRS looks for.8Internal Revenue Service. Form 14815 – Supporting Documents to Prove the Child Tax Credit and Credit for Other Dependents
For residency, keep your lease or mortgage records along with school records, medical documents, or government mail addressed to her at your address. Utility bills or insurance policies listing both names are strong evidence.
For support, gather bank statements, receipts, and records of what you spent on housing, food, medical care, and other living expenses. You’ll need to show what her total support from every source looked like, not just what you paid.
For income, keep her W-2s, any 1099s, and other income records that show she stayed under the gross income limit.
Penalties for a Wrong Claim
A dependent claim the IRS disallows costs you the additional tax plus interest, and the agency can add accuracy-related penalties for negligence. The bigger consequence is future filing restrictions. If the IRS finds you claimed the Credit for Other Dependents through reckless or intentional disregard of the rules, you can be banned from claiming that credit for two years. If the claim is deemed fraudulent, the ban runs ten years.9Taxpayer Advocate Service. Erroneously Claiming Certain Refundable Tax Credits Could Lead to Being Banned From Claiming the Credits The same ban framework applies to the Earned Income Tax Credit, Child Tax Credit, and American Opportunity Tax Credit, so a single bad dependent claim can affect multiple credits for years.
When the facts are close, say she earned $5,100 instead of $5,050, or she moved in on January 15 instead of January 1, document everything and consider a tax professional before you file.