Who Must File Taxes and Why
The Internal Revenue Service (IRS) requires certain people to file a federal income tax return each year. Whether you must file depends on several factors, including your age, filing status, income level, and type of income you earned. Understanding these requirements helps you stay in compliance with tax law and avoid potential penalties.
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For the 2023 tax year (filed in 2024), a single person under age 65 must file if their gross income was $13,850 or more. If you're 65 or older, the threshold is $15,550. These amounts change annually because they're adjusted for inflation. If you're married filing jointly and both spouses are under 65, you must file if your combined gross income was $27,700 or more. The threshold is higher if one or both spouses are 65 or older—it becomes $28,700 if one spouse is 65 or older.
Gross income includes wages, salaries, tips, taxable interest, dividends, and self-employment income. However, certain types of income don't count toward these thresholds, such as tax-exempt interest from municipal bonds. Some people must file even if their income is below these thresholds. For example, if you had self-employment income of $400 or more, you're required to file a federal return because you may owe self-employment tax.
Additional situations requiring you to file include receiving advance earned income tax credit payments, having net profit from self-employment, or owing alternative minimum tax. Students claimed as dependents have different thresholds. If you received a Form 1098-T (education credit), Form 3921 (stock options), or certain other forms, you generally must file regardless of income level.
State and local taxes have separate filing requirements that often differ from federal requirements. Some states tax income while others don't. If you lived or worked in multiple states, you may need to file returns in more than one location. Some cities also impose local income taxes.
Practical Takeaway: Review the IRS's filing requirements chart on their website each year, as income thresholds change annually. If you're unsure whether you must file, erring on the side of caution by filing anyway protects you from penalties. Keep records of all income documents (W-2s, 1099s) received in the tax year to determine your exact gross income.
Understanding Different Types of Income and Reporting
Different types of income require different reporting methods and forms. Understanding these categories helps you gather the right documents and report everything correctly to the IRS. Income generally falls into several broad categories: wages and salaries, self-employment income, investment income, and other sources.
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Wages and salaries from an employer are reported on a W-2 form, which your employer sends to you by January 31 each year. This form shows your gross income, federal taxes withheld, Social Security taxes, Medicare taxes, and state taxes withheld. If you work multiple jobs, you'll receive a separate W-2 from each employer. W-2 income is straightforward—you simply report the wages shown on these forms on your tax return.
Self-employment income includes earnings from being your own boss, running a business, freelancing, or gig work. This income is reported on Form 1099-NEC (nonemployee compensation) or Form 1099-MISC (miscellaneous income), depending on the amount and type of work. If you received more than $600 from a client during the year, they should send you a 1099 form. However, you must report self-employment income even if you don't receive a 1099. Self-employed individuals also owe self-employment tax (Social Security and Medicare taxes), which adds to their total tax liability. You calculate this on Schedule SE and report it on your return.
Investment income includes interest, dividends, and capital gains. Interest from savings accounts, bonds, and CDs is reported on Form 1099-INT. Dividends are reported on Form 1099-DIV. When you sell stock or other investments at a profit, that gain is taxable income. Long-term capital gains (assets held more than one year) are usually taxed at lower rates than short-term gains (assets held one year or less). You report investment transactions on Schedule D and Form 8949.
Other income sources include rental income (reported on Schedule E), unemployment benefits, Social Security benefits (partially taxable depending on other income), retirement account distributions (IRAs, 401(k)s), and prizes or gambling winnings. Rental income allows you to deduct expenses like mortgage interest, property taxes, repairs, and depreciation. Retirement distributions from traditional accounts are fully taxable, while Roth distributions may be tax-free. Each income type has specific reporting requirements and rules about deductions.
Practical Takeaway: Create a checklist of all income forms you expect to receive (W-2s, 1099s, etc.) and request them by phone or email if they don't arrive by February. Organize these documents in a folder before you begin preparing your return. This prevents missed income and ensures your return matches what the IRS has on file about your income.
Standard Deduction Versus Itemized Deductions
Two main approaches exist for reducing your taxable income: taking the standard deduction or itemizing deductions. Understanding the difference helps you determine which method saves you more in taxes. The standard deduction is a set amount established by the IRS each year that reduces your taxable income automatically. Itemized deductions are specific expenses you paid during the year that you add up and deduct instead of taking the standard deduction.
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For 2023, the standard deduction is $13,850 for single filers, $20,800 for head of household filers, and $27,700 for married filing jointly filers. These amounts increase slightly each year. The standard deduction is higher for people age 65 or older. An additional $1,850 is added to the standard deduction for single filers age 65 or older, and an additional $1,500 is added for married filers age 65 or older. Using the standard deduction is simpler because you don't need to track or prove individual expenses.
Itemized deductions allow you to deduct specific categories of expenses instead of taking the standard deduction. Common deductible expenses include state and local taxes (SALT), up to $10,000 total; mortgage interest on a loan up to $750,000; charitable contributions; and medical expenses exceeding 7.5% of your adjusted gross income. Home office expenses, investment losses, and certain professional fees may also be deductible. To itemize, you must complete Schedule A and attach it to your return.
You should itemize only if your total deductible expenses exceed your standard deduction amount. For example, if you're a single filer with a standard deduction of $13,850, you should itemize only if your qualifying deductions total more than $13,850. Many taxpayers benefit more from the standard deduction because their deductible expenses don't reach that threshold. About 90% of taxpayers use the standard deduction.
However, homeowners with mortgages and high state taxes may benefit from itemizing. If you live in a high-tax state and own a home with significant mortgage interest, your SALT deduction plus mortgage interest might exceed the standard deduction. Similarly, people who donate substantial amounts to charity or incur large medical expenses may itemize. Keep careful records of all potential deductible expenses to make this calculation accurately.
Practical Takeaway: Before filing, add up your potential itemized deductions (mortgage interest, property taxes, charitable donations, medical expenses). Compare this total to your standard deduction amount for your filing status. If your itemized deductions exceed the standard deduction, itemize on Schedule A. Otherwise, claim the standard deduction to simplify your return.
Tax Credits and How They Reduce Your Tax Bill
Tax credits directly reduce the amount of taxes you owe, making them more valuable than deductions. While a deduction reduces your taxable income, a credit reduces your tax bill dollar-for-dollar. Understanding which credits you may be eligible for can substantially lower what you owe. The IRS offers numerous credits designed to help people in different situations.
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The Earned Income Tax Credit (EITC) is one of the largest federal tax credits. It's designed for people with low to moderate income who work.