Filing status: the five statuses and their tests
Filing status is the category that decides which tax rates, standard deduction and credit limits a return uses. There are five: single, married filing jointly, married filing separately, head of household and qualifying surviving spouse. The decision rule: fix the taxpayer’s marital status on the last day of the year first, then check the special statuses (surviving spouse, then head of household) before falling back to single or married filing separately. This guide uses tax year 2025 and IRS Publication 501 (2025). Rules and amounts can change by year, so a different exam year needs a fresh check.
The test sequence, step by step
Step 1: Married or unmarried on December 31? Marital status is generally set on the last day of the tax year. A person who is married on that day is considered married for the whole year. If a spouse died during the year, the survivor is considered married for the whole year and, if not remarried before the end of the year, may file jointly with the deceased spouse for the year of death.
Step 2: If married, joint or separate? Joint filing needs both spouses to agree to file one return combining income and deductions. Married filing separately is each spouse filing their own return. Publication 501 notes it may suit a spouse who wants to be responsible only for their own tax, but it generally produces more combined tax, with many credits and deductions restricted or reduced.
Step 3: If unmarried, does a special status apply? Two statuses reward people who support a household.
- Qualifying surviving spouse uses joint rates and the highest standard deduction, without filing a joint return. For 2025, all of these must hold: the taxpayer could have filed a joint return with the spouse in the year of death; the spouse died in 2023 or 2024; the taxpayer has not remarried by the end of 2025; the taxpayer has a child or stepchild (not a foster child) who can be claimed as a dependent (or could be, but for a few listed exceptions), who lived in the home all year apart from temporary absences; and the taxpayer paid more than half the cost of keeping up the home. The status lasts two years after the year of death.
- Head of household requires being unmarried or considered unmarried on the last day of the year, paying more than half the cost of keeping up a home, and having a qualifying person live there for more than half the year. A dependent parent is the exception: the parent need not live with the taxpayer, but the taxpayer must pay more than half the cost of keeping up the parent’s main home.
Step 4: Considered unmarried. A married person can still file as head of household if they file a separate return, pay more than half the cost of keeping up the home, the spouse did not live in the home during the last six months of the year, and the home is the main home of their child, stepchild or foster child for more than half the year. The taxpayer must be able to claim that child as a dependent, unless the only reason they cannot is that the noncustodial parent claims the child.
Step 5: Otherwise the taxpayer is single (unmarried or legally separated under a divorce or separate maintenance decree on the last day of the year) or married filing separately.
A worked example
Dana and Chris separated in 2024. Chris moved out in March 2025 and has not lived in the home since. Their 12-year-old lives with Dana all year and Dana can claim the child as a dependent, Dana pays all the household costs, and no divorce decree exists by December 31, 2025. Dana is still legally married, so single is out. Chris was away for more than the last six months, Dana paid more than half the cost of the home, and the child lived there all year, so Dana is considered unmarried and may file as head of household. If Dana had paid only a third of the costs, the test fails and Dana is limited to married filing separately or joint. The same facts with a final decree dated November 2025 would make Dana unmarried on December 31 and head of household would apply directly.
Which exams test this
| Exam | How the topic appears | Covered on this site |
|---|---|---|
| SEE Part 1 | Domain 1, Preliminary Work and Taxpayer Data, lists determining the taxpayer’s filing status. Domain 5, Advising the Individual Taxpayer, lists the advantages and disadvantages of MFJ, MFS and HOH in different scenarios, including joint and several liability | Preliminary work explained and advising individuals |
The Part 2 and Part 3 outlines list no filing-status objective. A preparer who claims head of household for a client must meet due diligence requirements, and SEE Part 3 lists the preparer due diligence penalty, which is why the status also comes up in preparer penalties.
How exam questions are built
The scenario hides the status in the facts, and the usual traps are:
- Date of death. A spouse who died in the tax year means married filing jointly for that year. Qualifying surviving spouse starts the following years, and only with a dependent child.
- “Last six months.” Counting months is the test for considered unmarried.
- “More than half.” It appears twice for head of household, once for the cost of keeping up the home and once for time the qualifying person lived there.
- Foster child. A foster child can make someone head of household but does not qualify the taxpayer as a surviving spouse.
- Decree wording. Legally separated under a decree counts as unmarried, an informal separation does not.
Read the final date, then count months, then ask who paid the household costs.
Practice questions
Question 1. Priya's husband died in 2024. She has not remarried, and her 9-year-old son, whom she can claim as a dependent, lived with her all of 2025. She paid more than half the cost of keeping up the home. Which filing status can she use for 2025 for the lowest tax?
- A. Married filing jointly
- B. Single
- C. Qualifying surviving spouse
- D. Married filing separately
Show answer
Answer: C
Her spouse died in 2024, her son qualifies, he lived with her all year, she paid more than half the home costs and she has not remarried, so qualifying surviving spouse applies for 2025, the year after the year of death. Married filing jointly was available only for the year of death. Single and married filing separately do not apply and carry fewer benefits.
Question 2. Omar is married but filed a separate return for 2025. His wife moved out on February 1 and has not lived in the home since. His 7-year-old daughter lived with him all year, he can claim her, and he paid more than half the cost of the home. Which status may he use?
- A. Single
- B. Qualifying surviving spouse
- C. Married filing separately only
- D. Head of household
Show answer
Answer: D
His spouse did not live in the home during the last six months of the year, his home was the main home of his qualifying child for more than half the year and he paid more than half the costs, so he is considered unmarried and may file as head of household. Married filing separately is allowed but not the most favourable. Single is not available because he is still legally married. Qualifying surviving spouse requires that the spouse has died.