Individuals must file a federal income tax return with the IRS if their gross income meets or exceeds the minimum threshold set by the IRS for their filing status, age, and tax bracket. This includes earned income, self-employment earnings, investment gains, and certain government benefits.
The IRS sets annual thresholds based on income level, filing status (single, married filing jointly, head of household, etc.), and age. For 2023, a single filer under age 65 must file if gross income is $13,850 or more. A married couple filing jointly under 65 must file if combined income reaches $27,700. These numbers rise for those aged 65 or older due to higher standard deductions.
Failing to file when required can result in penalties, interest on unpaid taxes, and loss of refundable credits like the Earned Income Tax Credit (EITC). The IRS uses Form 1040 or Form 1040-SR for most individuals. Filing electronically through the IRS Free File program is available to those earning under $73,000.
Thresholds vary by filing status. Single filers have lower thresholds than married couples filing jointly. Heads of household face intermediate limits. Age increases the threshold due to expanded standard deductions.
For 2023, the following apply:
| Filing Status | Age | Minimum Filing Threshold |
|---|---|---|
| Single | Under 65 | $13,850 |
| Single | 65 or older | $15,700 |
| Married Filing Jointly | Both under 65 | $27,700 |
| Married Filing Jointly | One spouse 65+ | $29,550 |
| Head of Household | Under 65 | $20,100 |
| Head of Household | 65 or older | $22,050 |
These figures reflect the IRS's official guidelines published in Publication 501, "Dependents, Standard Deduction, and Filing Information." The Tax Foundation notes that these thresholds are adjusted annually for inflation, with changes typically announced in late October.
Even if income falls below the threshold, certain conditions require filing. These include receiving advance child tax credit payments, having self-employment income above $400, or being subject to the Alternative Minimum Tax (AMT).
Self-employment income above $400 triggers a requirement to file Schedule SE (Form 1040) to report Social Security and Medicare taxes. A sole proprietor earning $5,000 in freelance work must file, even if total income is below $13,850. The IRS treats net earnings from self-employment as taxable income regardless of income level.
Another common oversight: receiving advance Child Tax Credit payments totaling $2,000 or more in 2023. Households that received these advances must file to reconcile them against the actual credit amount they qualify for. Failure to file may lead to a refund delay or an underpayment penalty.
Many assume that if income is below the threshold, no return is needed. That's incorrect. Filing is mandatory when specific tax events occur-even if no tax is owed.
For example, a student with $10,000 in scholarship income and $5,000 in wages must file. Scholarship money is generally tax-free, but wages are taxable. Since the total gross income ($15,000) exceeds the $13,850 threshold for a single filer under 65, the return is required. The IRS clarifies this in Publication 505, "Tax Withholding and Estimated Tax," stating that all taxable income counts toward the threshold.
A non-obvious rule: if you're claimed as a dependent on someone else's return, your filing obligation depends on your own income. A dependent child with $12,000 in unearned income (e.g., dividends) must file if their total income exceeds $1,250, even if their parents' income is low. This is distinct from the standard threshold and often overlooked.
Consider Maya, a 22-year-old college student working part-time. She earned $14,200 in wages and $800 in interest from a savings account. Her total gross income is $15,000. As a single filer under 65, her threshold is $13,850. Because $15,000 exceeds $13,850, she must file.
She owes no federal income tax because her taxable income is below the standard deduction. But she still files to claim the $1,200 American Opportunity Tax Credit for education expenses. Without filing, she loses access to this refundable credit. The IRS reports that nearly 1.4 million students claimed this credit in 2023, many of whom had incomes below the threshold but were required to file due to education-related deductions.
If you're uncertain whether you must file, use the IRS Interactive Tax Assistant tool. It asks a series of questions about income, filing status, and dependents to determine your obligation. The tool is free and accessible at IRS Interactive Tax Assistant.
For those who file by mail, processing times average 8 to 12 weeks. Paper returns take longer than e-filed ones. If you're expecting a refund, allow 21 days for direct deposit or 6 weeks for a paper check. IRS paper file processing time details the timeline and tracking options.
Finally, if you owe taxes and cannot pay by the April 15 deadline, consider setting up an installment agreement. The IRS allows payments over 72 months with a setup fee of $149. Interest accrues at the federal rate, currently 8%. Avoiding penalties requires proactive action.
Understanding who must file ensures compliance and access to benefits. Always verify your obligation using current IRS publications, not outdated assumptions.