Filing Status
Your tax classification based on marital and family situation — Single, Married Filing Jointly, Married Filing Separately, Head of Household, or Qualifying Surviving Spouse.
Your filing status determines your standard deduction amount, tax bracket thresholds, and eligibility for various credits and deductions. The IRS recognizes five filing statuses: Single, Married Filing Jointly (MFJ), Married Filing Separately (MFS), Head of Household (HOH), and Qualifying Surviving Spouse.
Married Filing Jointly is typically the most favorable status for married couples because it offers the widest tax brackets and largest standard deduction ($31,500 in 2025). Head of Household provides a higher standard deduction ($23,625 in 2025) than Single and wider brackets for unmarried taxpayers who pay more than half the cost of maintaining a home for a qualifying dependent.
Your filing status is generally determined by your marital status on December 31. If your spouse died during the tax year, you can usually still file jointly for that year. Choosing the right filing status can result in significant tax savings, so it is worth comparing options if you qualify for more than one.
How it works
Filing status is the classification the IRS uses to determine which standard deduction amount applies to you, where your tax bracket boundaries fall, and whether you qualify for certain credits at all. The five statuses are Single, Married Filing Jointly, Married Filing Separately, Head of Household, and Qualifying Surviving Spouse, and each one comes with its own set of bracket widths and deduction amounts baked into the tax tables. The same taxable income can produce a different tax bill purely because of which status is used to calculate it.
Your filing status is generally locked in by your marital status on December 31 of the tax year — if you married on December 30, you are considered married for the whole year for tax purposes, and the same applies in reverse for divorce. You select your status near the top of Form 1040, and it drives nearly every downstream calculation: the standard deduction line, the bracket table your tax is computed from, and eligibility tests on many credit worksheets. Married Filing Jointly uses the widest brackets and the largest standard deduction, $31,500 for 2025, which is why it is usually the most favorable option for married couples.
Head of Household is an easy status to miss if you qualify: it requires being unmarried, paying more than half the cost of maintaining a home, and having a qualifying dependent live with you for more than half the year, and its $23,625 standard deduction for 2025 sits between Single and MFJ. Married couples sometimes assume filing separately protects one spouse from the other's tax issues, but MFS usually produces a worse overall result because it disqualifies you from several credits entirely and uses the narrowest bracket widths — it is worth running the numbers both ways before defaulting to it.
Example: same income, different filing status
Two unmarried taxpayers, each with $60,000 in taxable income, file under different statuses. One files Single and takes the 2025 standard deduction embedded in the Single bracket structure; the other qualifies for and files Head of Household.
Because Head of Household brackets are wider than Single brackets at the same income level, and its standard deduction of $23,625 is larger than the Single amount, the Head of Household filer generally owes less federal tax on the identical $60,000 of taxable income, even before any credits are applied.
Frequently asked questions
What filing status should I use if I got married this year?
Do I qualify for Head of Household if I'm not married?
Is it ever better to file Married Filing Separately?
Related Terms
Standard Deduction
A fixed dollar amount that reduces your taxable income, available to all filers who do not itemize. For 2025, it is $15,750 for single filers and $31,500 for married filing jointly (OBBBA-adjusted).
Tax Bracket
A range of income taxed at a specific rate. The US uses a progressive system with seven brackets ranging from 10% to 37% for 2025.
Taxable Income
The portion of your income that is actually subject to federal income tax, calculated by subtracting the standard or itemized deduction from your AGI.