Which filing status you should use
The five filing statuses, the head of household test people get wrong, what married filing separately costs you, and when a widowed spouse files jointly.
Quick answers
- Can I file as head of household?
- Only when all three tests hold: you were unmarried at year end, or treated as unmarried because your spouse was out of the home for the last six months; you paid more than half the cost of keeping up your home; and a qualifying person lived there with you for more than half the year.
- What do I lose by filing married filing separately?
- The earned income credit is generally off the table, education credits are not available at all, the child and dependent care credit is usually lost, and the tips, overtime and senior deductions added for 2025 require a joint return.
- What filing status do I use if my spouse died?
- For the year of death you can generally still file a joint return. For the two years after, if a dependent child lives with you, you paid more than half the cost of the home and you have not remarried, qualifying surviving spouse uses the joint brackets.
Your filing status is decided by your marital and household situation on the last day of the year, not by what you would prefer. It sets your standard deduction, your rate brackets, and whether several credits are open to you at all.
| Standard deduction, single | $15,750 | 2025 Instructions for Form 1040, Standard Deduction Chart |
|---|---|---|
| Standard deduction, married filing jointly | $31,500 | 2025 Instructions for Form 1040, Standard Deduction Chart |
| Standard deduction, head of household | $23,625 | 2025 Instructions for Form 1040, Standard Deduction Chart |
| Standard deduction, married filing separately | $15,750 | 2025 Instructions for Form 1040, Standard Deduction Chart |
The five statuses
- Single. You were unmarried on the last day of the year and no other status fits.
- Married filing jointly. You were married on the last day of the year and you and your spouse report everything on one return. Both of you are responsible for the whole balance due.
- Married filing separately. You were married but each of you files your own return. See the trade-offs below before you choose it.
- Head of household. You were unmarried, kept up a home, and a qualifying person lived there with you. The standard deduction sits between single and joint.
- Qualifying surviving spouse. Available for a limited window after a spouse dies, if you have a dependent child.
If more than one status fits, you generally use the one that gives the lower tax. A married couple can compare a joint return with two separate returns, but each spouse must use the same method for deductions, so both itemize or both take the standard deduction.
Head of household, the test people get wrong
Head of household is not simply "I have a child". Three things have to be true at once:
- You were unmarried at the end of the year. A married person is treated as unmarried for this purpose only if all of the following hold: their spouse did not live in the home at any time during the last six months of the year, they file a separate return, and their child, stepchild, foster child, or adopted child whom they can claim lived in the home with them.
- You paid more than half the cost of keeping up your home for the year: rent or mortgage interest, property taxes, insurance, utilities, repairs, and food eaten at home.
- A qualifying person lived in that home with you for more than half the year. A qualifying child usually counts, and if you were unmarried, a dependent parent can count even if they live elsewhere.
Temporary absences such as school, illness, or military service still count as time at home. If any one of the three fails, you file under one of the other statuses instead.
Married filing separately, and what it costs
Separate returns sometimes make sense: a spouse with large medical bills measured against a smaller income, an income-driven student loan payment, or a situation where you do not want to be responsible for the other return. Understand what you give up first.
- The earned income credit is generally off the table, except for a separated spouse who lived apart from their spouse for the last six months of the year or is legally separated under state law, and who had a qualifying child living with them for more than half the year.
- Education credits are not available on a separate return at all.
- The child and dependent care credit is usually lost. It survives only if you lived apart from your spouse for the last six months of the year, your home was the qualifying person's main home for more than half the year, and you paid more than half the cost of keeping it up.
- The tips, overtime, and senior deductions added for 2025 all require a joint return if you are married.
- The child tax credit phase-out starts at $200,000 for a separate return rather than $400,000 for a joint one.
Qualifying surviving spouse
For the year your spouse dies, you can generally still file a joint return. For the two years after that, if you have a dependent child living with you, you paid more than half the cost of keeping up the home, and you have not remarried, you can file as a qualifying surviving spouse. That status uses the same standard deduction and the same rate brackets as a joint return, which is why it is worth checking before defaulting to head of household.
Getting the choice right
The status you claim has to match the facts, and the IRS matches names and Social Security numbers against its records. Two common problems are worth naming: two people claiming head of household for the same child, and a couple who separated mid-year but were still legally married on December 31, so neither can file as single.
If your situation changed during the year through marriage, separation, a death, or a child moving in or out, bring the dates to your preparer. The correct status is usually the one that follows from those dates, and running the numbers both ways takes only a few minutes.