You have to file a federal tax return if your gross income for the year meets the threshold set for your filing status and age, or if one of several special situations applies no matter how little you earned. For the 2025 tax year, returns due April 15, 2026, a single person under 65 must file once gross income reaches $15,750; a married couple filing jointly must file at $31,500. The special triggers include self-employment net earnings of $400 or more, receiving advance Premium Tax Credits through the health insurance marketplace, and taking HSA distributions, among others.
Income Thresholds for the 2025 Tax Year
Each year’s filing threshold matches the standard deduction for your filing status. Fall below it and, in most cases, you owe no federal income tax and aren’t required to file. Turn 65 by the end of the year and the number goes up because of an additional standard deduction: $2,000 for unmarried filers, $1,600 for married filers and surviving spouses.
Single and Head of Household
- Single, under 65: $15,750
- Single, 65 or older: $17,550
- Head of Household, under 65: $23,625
- Head of Household, 65 or older: $25,625
Head of Household is available if you’re unmarried (or considered unmarried) and pay more than half the cost of maintaining a home for a qualifying dependent. The larger standard deduction is what pushes the filing threshold up.1Internal Revenue Service. Check if You Need to File a Tax Return
Married and Qualifying Surviving Spouse
- Married Filing Jointly, both under 65: $31,500
- Married Filing Jointly, one spouse 65 or older: $33,100
- Married Filing Jointly, both 65 or older: $34,700
- Married Filing Separately, any age: $5
- Qualifying Surviving Spouse, under 65: $31,500
- Qualifying Surviving Spouse, 65 or older: $33,100
The $5 figure for Married Filing Separately is not a typo. That status effectively requires both spouses to file whenever one does. Qualifying Surviving Spouse status is available for up to two years after your spouse’s death if you have a dependent child and haven’t remarried.1Internal Revenue Service. Check if You Need to File a Tax Return
Your filing status is set by your situation on December 31 of the tax year.2Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information
Gross Income Includes More Than Your Paycheck
Gross income covers virtually everything you received during the year that isn’t specifically excluded by law: wages, salaries, tips, freelance income, interest, dividends, rental income, business profits, gains from selling property, alimony received under pre-2019 agreements, and income from foreign sources.3Office of the Law Revision Counsel. 26 USC 61 – Gross Income Defined
A few common items are excluded and don’t count toward the threshold: interest from tax-exempt municipal bonds, the non-taxable portion of Social Security benefits, life insurance proceeds paid because of death, gifts, and inheritances. The filing thresholds are measured against gross income, not what landed in your bank account.
If Someone Can Claim You as a Dependent
A different, lower set of rules applies to dependents, which usually means teenagers with part-time jobs or students with investment income. For 2025, a single dependent under 65 and not blind must file if any of the following is true:
- Unearned income (interest, dividends, capital gains) exceeds $1,350
- Earned income exceeds $15,750
- Total gross income exceeds the larger of $1,350 or earned income (up to $15,350) plus $400
The earned income figure matches the Single standard deduction, but the unearned income floor is far lower. A child with $1,400 in dividends from a custodial account has to file even though that amount is nowhere near the $15,750 general threshold.2Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information
Once a child’s unearned income tops $2,700, the “kiddie tax” can apply, taxing part of that investment income at the parent’s marginal rate. Parents can sometimes elect to report the child’s income on their own return if the child’s total is under $13,500 and consists only of interest and dividends.4Internal Revenue Service. Topic No. 553 – Tax on a Childs Investment and Other Unearned Income (Kiddie Tax)
Situations That Force You to File Regardless of Income
The thresholds above are irrelevant if any of the following applies. This is where people who assume they’re off the hook get caught.
Self-Employment Earnings of $400 or More
Net self-employment earnings of $400 in a year require a return. That includes freelance work, gig economy income, side businesses, and any 1099-NEC contract work. The return is how you report and pay Social Security and Medicare taxes on those earnings.5Internal Revenue Service. Topic No. 554 – Self-Employment Tax
Advance Premium Tax Credits from the Marketplace
If you received advance payments of the Premium Tax Credit to lower your monthly health insurance premiums, you must file and attach Form 8962, even if your income would otherwise fall below the threshold. The return reconciles what was paid in advance with what you actually qualify for. Skipping it means losing eligibility for advance credits in future years, which leaves you paying full price for coverage.6Internal Revenue Service. Questions and Answers on the Premium Tax Credit
HSA or Archer MSA Distributions
Took money out of a Health Savings Account or Archer Medical Savings Account? You need to file, attaching Form 8889 for an HSA or Form 8853 for an Archer MSA. This holds even when every dollar went to qualified medical expenses and you owe no additional tax.7Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans
Alternative Minimum Tax or Recapture Taxes
You must file if you owe the Alternative Minimum Tax, which can apply to higher-income taxpayers whose regular tax would otherwise be reduced by certain deductions and preferences.8Internal Revenue Service. Topic No. 556 – Alternative Minimum Tax Filing is also required if you owe recapture taxes, such as after selling a home early that got you a first-time homebuyer credit, or on a traditional-to-Roth IRA conversion paid over multiple years.
Additional Medicare Tax
The 0.9% Additional Medicare Tax kicks in on wages, compensation, or self-employment income above $200,000 for most filers, $250,000 for married couples filing jointly, and $125,000 for married filing separately. Employers begin withholding at $200,000 regardless of your filing status, so a dual-income married couple may need to file to reconcile the difference between what came out of paychecks and what’s actually owed.9Internal Revenue Service. Questions and Answers for the Additional Medicare Tax
Retirees on Social Security
Social Security by itself often doesn’t push a retiree over the filing threshold, because a large portion of benefits may be excluded from gross income entirely.
Benefits stay completely out of gross income unless half your Social Security plus all other income (including tax-exempt interest) exceeds $25,000 for single filers or $32,000 for married couples filing jointly. Below those levels, none of your Social Security counts toward the filing threshold. Above them, between 50% and 85% of benefits become taxable and do count.10Internal Revenue Service. Publication 554 – Tax Guide for Seniors
One exception: if you’re married filing separately and lived with your spouse at any point in the year, the base amount drops to $0, and some portion of your benefits is always taxable.
Reasons to File Even When You Don’t Have To
Even when the IRS doesn’t require a return, filing one is often worth it. The reason is usually money.
If federal income tax came out of your paychecks but your income sat below the filing threshold, the only way to get that withholding back is to file and claim a refund. No return, no refund.
Refundable credits go further: they pay out even when your tax liability is zero.
- Earned Income Tax Credit: up to $8,046 for a family with three or more qualifying children for 2025; workers with no children can receive up to $649.
- Child Tax Credit: up to $2,200 per qualifying child, with up to $1,700 refundable as the Additional Child Tax Credit.
- American Opportunity Tax Credit: up to $1,000 refundable.
Eligible taxpayers miss these credits every year because they don’t file.11Internal Revenue Service. Refundable Tax Credits For a low-income family, the EITC alone can exceed several months of rent.12Internal Revenue Service. Earned Income and Earned Income Tax Credit (EITC) Tables
The window is not open forever. You generally have three years from the original due date to file and claim a refund. After that, the money stays with the Treasury.13Internal Revenue Service. Time You Can Claim a Credit or Refund
What Happens If You Skip a Required Return
Two separate penalties apply when you owe tax and don’t file. The failure-to-file penalty is 5% of unpaid tax for each month or partial month the return is late, capped at 25%. The failure-to-pay penalty is 0.5% per month, also capped at 25%. In months when both apply, the filing penalty is reduced by the payment penalty, so the combined rate is 5% per month, not 5.5%.14Internal Revenue Service. Failure to File Penalty15Internal Revenue Service. Collection Procedural Questions 3
Once a return is more than 60 days late, the minimum failure-to-file penalty becomes $525 or 100% of the unpaid tax, whichever is less. A small tax debt can generate an outsized penalty once you cross that mark.14Internal Revenue Service. Failure to File Penalty
If you’re owed a refund, neither penalty applies, because there’s no unpaid tax to calculate against.
State Filing Is a Separate Question
Federal rules don’t tell you anything about your state return. Most states impose their own income tax with their own thresholds, often lower than the federal ones. Nine states have no individual income tax: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming (Washington does tax certain capital gains above $270,000). Anywhere else, check the state revenue department; some states require a return after just one day of work within their borders.