You can claim an unmarried partner as a dependent on taxes if your partner meets every requirement the IRS sets for a “qualifying relative.” That means they lived with you all year, their gross income stayed below $5,200 for the 2025 tax year, you paid more than half of their support, and they’re a U.S. citizen, national, resident alien, or a resident of Canada or Mexico. If all of that holds, you get a $500 nonrefundable Credit for Other Dependents. You do not get head of household filing status, the Child Tax Credit, or any boost to the Earned Income Tax Credit.
The Five Tests Your Partner Must Pass
The IRS splits dependents into two buckets: qualifying children and qualifying relatives. An unmarried partner can only come in through the qualifying relative door, which federal law opens to an unrelated person who lives with you as a member of your household.1Office of the Law Revision Counsel. 26 USC 152 – Dependent Defined Your partner must pass all five:
- Not a qualifying child of you or anyone else for the tax year.
- A member of your household who lived with you the entire year, in an arrangement that does not violate local law.
- Gross income under the annual limit. For 2025, that limit is $5,200, adjusted each year for inflation.2Internal Revenue Service. Revenue Procedure 2024-40
- Received more than half of their total support from you.
- A U.S. citizen, U.S. national, U.S. resident alien, or a resident of Canada or Mexico.3Internal Revenue Service. Dependents
One more wrinkle: if your partner is married, they generally can’t file a joint return with their spouse. The only exception is a joint return filed solely to claim a refund of withheld taxes, where neither spouse would owe anything on separate returns.4Internal Revenue Service. Understanding Taxes – Dependents
How the Support Test Actually Works
The support test is where most partner claims either hold up or fall apart. You have to show you personally covered more than half of your partner’s total support for the full calendar year. Total support covers food, housing, clothing, medical and dental care, education, transportation, and recreation.5Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information
Housing is usually the biggest line, and the IRS doesn’t let you use your actual mortgage payment. You use fair rental value instead: what a stranger would reasonably pay to rent similar lodging in your area, including a reasonable allowance for furniture, appliances, and utilities. If your partner has the run of your whole home, you calculate a share of the full fair rental value. If they use only a room, you use the fair rental value of that room.5Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information
Shared costs get divided per person. If three people live in the home and you pay the whole grocery bill, only a third of that bill counts as support for your partner. Medical insurance premiums you pay on their behalf count too. Then compare: add up everything spent on your partner from every source, including whatever they spent on themselves, and confirm your share tops half.
What Counts Toward the Gross Income Limit
Gross income for this test means all income that isn’t tax-exempt. Wages, self-employment earnings, interest, dividends, rental income, and the taxable portion of retirement distributions all count. Non-taxable Social Security benefits and welfare payments do not.6Internal Revenue Service. Understanding Taxes – Module 4 Dependents
That distinction matters for partners on Social Security. If your partner receives $15,000 in Social Security and none of it is taxable (common when Social Security is their only income), the $15,000 doesn’t count against the $5,200 limit. They can still pass the test as long as their other taxable income stays under the threshold.
The All-Year Residency Rule
Your partner has to live with you the entire year. Short separations are fine as long as they count as temporary absences, which the IRS defines as absences caused by illness, education, business, vacation, or military service, where it’s reasonable to expect the person to return home.7Internal Revenue Service. Temporary Absence A partner who moved in during March doesn’t qualify for that tax year, no matter how much support you provided.
The living arrangement also can’t violate local law.8Internal Revenue Service. Understanding Taxes – Module 4 Dependents A few states once had cohabitation statutes on the books. Most have been repealed, and enforcement was effectively nonexistent for years before that. Worth knowing it’s a rule; rarely a real obstacle.
What You Get, and What You Don’t
Claiming your partner as a qualifying relative makes you eligible for the Credit for Other Dependents, a nonrefundable credit worth up to $500. It phases out when your adjusted gross income passes $200,000, or $400,000 if you’re married filing jointly.9Internal Revenue Service. Child Tax Credit
Nonrefundable means the credit can reduce your tax to zero but won’t generate a refund on its own. If your tax liability is $300, the credit saves you $300, not $500. The amount is calculated on Schedule 8812 and flows to Form 1040, line 19.10Internal Revenue Service. Schedule 8812 (Form 1040)
Now the limits. Claiming an unmarried partner does not qualify you for head of household filing status. The IRS specifically excludes unrelated household members from the list of qualifying persons for that status, and Publication 501 uses this exact scenario as an example: a friend who lives with you all year and passes every qualifying relative test still doesn’t make you head of household.5Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information The same reasoning applies to a partner. You also don’t get the Child Tax Credit (that requires a qualifying child under 17), and a qualifying relative doesn’t help with the Earned Income Tax Credit. The $500 is the whole benefit.
Putting the Claim on Your Return
On Form 1040, enter your partner’s full name, Social Security Number or ITIN, and relationship in the Dependents section on page 1. “None” is an acceptable entry for the relationship column when the person is an unrelated household member. Check the box in the row labeled “Credit for other dependents” so the $500 flows through on Schedule 8812.11Internal Revenue Service. Instructions for Schedule 8812 (Form 1040)
Records to Keep
The IRS doesn’t ask for proof when you file. It asks if your return gets pulled for review, and at that point you need to back up every piece of the claim. Hold on to:
- Residency evidence: a shared lease, utility bills, or mail at your address showing your partner lived there all year.
- Your partner’s income documents: W-2s, 1099s, or other statements showing gross income stayed under the threshold.
- A support calculation: a line-by-line breakdown of what was spent on your partner from all sources, and how much came from you. Include a fair rental value figure for lodging, pulled from comparable listings in your area.
The support math is what auditors examine most closely. A rough estimate won’t survive scrutiny. A spreadsheet will.
Penalties If the Claim Is Wrong
A dependent claim you weren’t entitled to isn’t treated as a minor slip. If the IRS finds the error came from negligence or carelessness, it can tack on an accuracy-related penalty of 20% of the underpaid tax, plus interest until you pay the balance.12Internal Revenue Service. Accuracy-Related Penalty
It gets worse if the IRS decides you were reckless or intentionally disregarded the rules. In that case you can be barred from claiming the Credit for Other Dependents for two years. A fraudulent claim brings a ten-year ban.13Taxpayer Advocate Service. Erroneously Claiming Certain Refundable Tax Credits Could Lead to Being Banned From Claiming the Credits The line between an honest mistake and recklessness usually comes down to whether you made a reasonable effort to confirm eligibility before filing, and the documentation above is the simplest way to show that effort.