Yes, you can claim your live-in girlfriend as a dependent on your taxes if she meets four IRS tests: she lived in your home the entire tax year, her gross income for 2026 was under $5,300, you provided more than half of her total support, and your living arrangement doesn’t violate local law.1Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined The IRS calls her a “qualifying relative,” a category that has nothing to do with being related by blood. The direct payoff is a $500 nonrefundable credit, though the claim can also open the door to medical expense deductions on Schedule A.
The Four Tests She Has to Pass
The label on your relationship doesn’t matter to the IRS. Every one of these tests has to clear. Miss one and the whole claim fails.
- Residency. Your home has to be her principal home for the full year. Temporary absences for illness, school, business, vacation, or military service still count as time in the home if she’s expected to return. Someone who moved in mid-year doesn’t qualify for that tax year.2Internal Revenue Service. Temporary Absence
- Income. Her gross income for 2026 has to stay under $5,300. A dollar over the line kills the claim.3Internal Revenue Service. Revenue Procedure 2025-32
- Support. You have to provide more than half of her total financial support for the year.
- Local law. Your cohabitation can’t violate local law. A few jurisdictions still have cohabitation statutes on the books, and the federal tax code incorporates that restriction.1Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined
Three more requirements apply to any dependent. She has to be a U.S. citizen, U.S. resident alien, U.S. national, or a resident of Canada or Mexico. She can’t be the qualifying child of another taxpayer, so if her parents could claim her, you can’t.4Internal Revenue Service. Dependents And if she’s legally married but separated, she can’t have filed a joint return with her spouse for that tax year.1Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined
How the Support Test Really Works
Support counts everything spent on her, not only what you paid. Add up all support from every source for the year — your contributions, her own spending, help from family, government benefits — and your share has to exceed 50% of that total.5Internal Revenue Service. Publication 4491 – Dependency Exemptions
Support includes housing (her fair share of rent or the fair rental value of rooms she uses), food, clothing, medical and dental care, transportation, and recreation. State benefits like food assistance or housing subsidies count as support provided by the state, which makes clearing the 50% mark harder on your end.5Internal Revenue Service. Publication 4491 – Dependency Exemptions
One detail catches people out. Nontaxable Social Security benefits she receives are excluded from the gross income test, but they count toward total support if she spends them on herself.6Internal Revenue Service. Publication 501 (2025) – Dependents, Standard Deduction, and Filing Information A girlfriend collecting $4,800 in nontaxable Social Security passes the income test but makes the support test harder for you to hit. The two tests measure different things.
Her savings count only if she actually spends them on her own support. Money left in the account doesn’t factor in. Money withdrawn for a medical bill or new clothes does, and it counts as support she provided for herself.
What Counts as Gross Income
For 2026, the ceiling is $5,300.3Internal Revenue Service. Revenue Procedure 2025-32 The IRS adjusts it each year for inflation, so check the current figure before filing. Gross income covers wages, salary, tips, taxable interest, dividends, rental income, and business earnings.
Nontaxable Social Security, tax-exempt interest, and nontaxable veterans’ benefits don’t count toward the limit. If any part of her Social Security is taxable (which happens when combined income crosses certain thresholds), the taxable portion counts. Wages of $5,200 plus $3,000 in nontaxable Social Security keeps her under the line. Wages of $5,301 ends the discussion for that year.
What the Claim Is Worth
Claiming her as a qualifying relative gives you the Credit for Other Dependents, a nonrefundable credit worth up to $500.7Internal Revenue Service. Understanding the Credit for Other Dependents Nonrefundable means it can zero out tax you owe but won’t produce a refund on its own. Owe $300 in federal tax, and the credit erases the $300; the other $200 goes nowhere.
The credit begins phasing out once your adjusted gross income exceeds $200,000 as a single filer, or $400,000 for married filing jointly.8Internal Revenue Service. Parents – Check Eligibility for the Credit for Other Dependents
An unrelated qualifying relative does not unlock Head of Household filing status. That status requires a related qualifying child or qualifying relative, and an unrelated household member doesn’t count even when the IRS lets you claim her as a dependent. You’ll still file as Single. Claiming her also doesn’t qualify you for the Earned Income Tax Credit or the Child Tax Credit, both of which require a qualifying child.
The other real benefit is medical. If you pay medical or dental bills for her and she qualifies as your dependent, those costs go into your medical expense deduction on Schedule A. Only the portion of total medical expenses above 7.5% of your adjusted gross income is deductible, so this mainly helps if her bills (combined with yours) are large.9Internal Revenue Service. Publication 502 – Medical and Dental Expenses She has to meet the qualifying relative tests either when the care was provided or when you paid for it.
How to File the Claim
On Form 1040, the Dependents section asks for each dependent’s first name, last name, Social Security number, and relationship to you. In the relationship field, “girlfriend” or “none” is fine; the IRS wants an honest description, not a family title. In the credit column, check the box for “Credit for other dependents” rather than “Child tax credit.”10Internal Revenue Service. Form 1040
You need her Social Security number. If she isn’t eligible for one, she can apply for an Individual Taxpayer Identification Number using Form W-7, and the IRS uses that number to match reported income and block duplicate claims.11Internal Revenue Service. Individual Taxpayer Identification Number (ITIN)
Pull her W-2 and any 1099s to confirm her gross income stayed under $5,300. Keep a written breakdown of household spending — rent, groceries, utilities, medical bills — showing your share of her support cleared 50%. Year-round residency can be documented with a lease listing both names, utility statements, or official mail sent to her at your address. Hold onto everything for at least three years from the filing date or two years from the date you paid the tax, whichever is later.12Internal Revenue Service. How Long Should I Keep Records
What Happens If You Get It Wrong
Claiming a dependent who doesn’t qualify triggers an accuracy-related penalty of 20% on top of the additional tax owed.13Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments The penalty rises to 40% for a substantial valuation overstatement. Both apply when the position was careless or lacked a reasonable basis.
Fabricating a dependent is a felony. Filing a return you know to be false carries fines up to $100,000 and up to three years in prison.14Office of the Law Revision Counsel. 26 USC 7206 – Fraud and False Statements The IRS matches Social Security numbers across every return filed nationally, so duplicate or fictitious claims are easy to spot.