IRS Publication 501 — Dependents, Standard Deduction, and Filing Information
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“If you and your spouse decide to file a joint return, your tax may be lower than your com- bined tax for the other filing statuses. Also, your standard deduction (if you don’t itemize deduc- tions) may be higher, and you may qualify for tax benefits that don’t apply to other filing sta- tuses.”
If you are a U.S. citizen or resident alien, whether you must file a federal income tax return depends on your gross income, your filing status, your age, and whether you are a dependent. For details, see Table 1 and Table 2. You must also file if one of the situations described in Table 3 applies. The filing requirements apply even if you owe no tax.
You may have to pay a penalty if you are required to file a return but fail to do so. If you willfully fail to file a return, you may be subject to criminal prosecution.
Gross income. Gross income is all income you receive in the form of money, goods, property, and services that isn’t exempt from tax. If you are married and live with your spouse in a community property state, half of any income defined by state law as community income may be considered yours. For a list of community property states, see Community property states under Married Filing Separately, later.
Self-employed persons. If you are self-employed in a business that provides services (where products aren’t a factor), your gross income from that business is the gross receipts. If you are self -employed in a business involving manufacturing, merchandising, or mining, your gross income from that business is the total sales minus the cost of goods sold. In either case, you must add any income from investments and from incidental or outside operations or sources.
Filing status. Your filing status generally depends on whether you are single or married. Whether you are single or married is determined at the end of your tax year, which is December 31 for most taxpayers. Filing status is discussed in detail later in this publication. Age. Age is a factor in determining if you must file a return only if you are 65 or older at the end of your tax year. For 2025, you are 65 or older if you were born before January 2, 1961.
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