The point of filing a tax return is that it’s the only way to collect refunds and credits you’re owed, the record lenders and Social Security use to verify your income, and the cheapest way to stay on the right side of the IRS if you owe money. For the 2026 filing season, your 2025 federal return is due April 15, 2026.1Internal Revenue Service. IRS Announces First Day of 2026 Filing Season; Online Tools and Resources Help With Tax Filing Even people whose income falls below the legal filing threshold routinely lose money by not filing, because withheld taxes and refundable credits don’t come back on their own.
Refunds and Credits You Only Get by Filing
Your employer withholds federal tax from each paycheck based on your Form W-4.2Internal Revenue Service. About Form W-4, Employee’s Withholding Certificate If the total withheld exceeds what you actually owe, the IRS keeps the difference until you file a return asking for it back. No return, no refund.
Filing also unlocks credits that can put more money in your pocket than you paid in. The Child Tax Credit is worth up to $2,200 per qualifying child for the 2025 tax year, and up to $1,700 of that per child is refundable through the Additional Child Tax Credit, so you can receive it even if your tax bill is zero.3Internal Revenue Service. Child Tax Credit
The Earned Income Tax Credit reaches further for lower-income workers. The maximum for the 2025 tax year runs from $649 with no qualifying children to $8,046 with three or more.4Internal Revenue Service. Earned Income and Earned Income Tax Credit (EITC) Tables The EITC is fully refundable. Qualifying filers who owe nothing can receive the entire credit as cash back. None of this arrives automatically. You have to file to get it.
The Income Record Filing Creates
Filed returns build a documented income history that matters well beyond tax season. Mortgage lenders pull tax transcripts to verify income and calculate debt-to-income ratios during underwriting. Fannie Mae’s guidelines, which most conventional lenders follow, specifically require tax return or transcript documentation to validate borrower income.5Fannie Mae. B3-3.1-02, Tax Return and Transcript Documentation Requirements
Students applying for federal financial aid must consent to having their tax information transferred directly from the IRS into the FAFSA form. Without that consent, you’re ineligible for federal student aid entirely.6Federal Student Aid. FAFSA Checklist: What Students Need Small business owners similarly rely on filed returns to qualify for commercial loans and government-backed grant programs.
Filing also feeds your earnings into the Social Security Administration’s records. Those records determine future retirement and Medicare eligibility. You generally need 40 work credits, roughly ten years of employment, to qualify for retirement benefits and full Part A Medicare coverage. Self-employment income you never report doesn’t count toward that total.
Who Is Legally Required to File
Federal law requires a return when your gross income exceeds thresholds tied to the standard deduction for your filing status.7Office of the Law Revision Counsel. 26 USC 6012 – Persons Required to Make Returns of Income The One, Big, Beautiful Bill raised the standard deduction for the 2025 tax year, shifting these thresholds upward.8Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill
For 2025 returns filed during the 2026 season, you must file if your gross income meets or exceeds these amounts:9Internal Revenue Service. Check if You Need to File a Tax Return
- 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
- 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
These apply to gross income before deductions. Falling below them doesn’t mean you shouldn’t file. If tax was withheld from your paycheck, or you qualify for refundable credits like the EITC or Additional Child Tax Credit, skipping your return just leaves your own money with the government.
Self-employment changes the math sharply. If you freelance, contract, or run a side business, you owe self-employment tax and must file once your net self-employment earnings reach just $400.10Internal Revenue Service. Topic No. 554, Self-Employment Tax The self-employment tax rate is 15.3%, covering both the employee and employer shares of Social Security (12.4%) and Medicare (2.9%). Clients that pay you $600 or more must issue a Form 1099-NEC, and payment apps issue Form 1099-K when transactions exceed $20,000 and 200 transactions in a year, a threshold reinstated under the One, Big, Beautiful Bill.11Internal Revenue Service. IRS Issues FAQs on Form 1099-K Threshold Under the One, Big, Beautiful Bill; Dollar Limit Reverts to $20,000 You owe tax on all self-employment income whether a 1099 arrives or not, but those forms give the IRS an easy way to spot a missing return.
What It Costs to Skip Filing
Two penalties can hit at once. The failure-to-file penalty is 5% of your unpaid tax for each month your return is late, up to 25%. The failure-to-pay penalty is 0.5% per month on any unpaid balance, also capped at 25%.12Office of the Law Revision Counsel. 26 USC 6651 – Failure to File Tax Return or to Pay Tax When both apply in the same month, the failure-to-file penalty drops to 4.5%, keeping the combined rate at 5%. Filing late still costs about ten times as much per month as paying late. If you can’t afford to pay, file anyway.
Ignore the obligation entirely and the IRS can prepare a Substitute for Return using wage and income data reported by your employers and banks. That version almost always produces a larger bill than one you’d calculate yourself, because it doesn’t include deductions or credits you might have claimed. You’ll owe the computed amount plus penalties and interest, and you’ll have to file your own return to dispute it.
Willful failure to file is a misdemeanor carrying a fine of up to $25,000 and up to one year in prison per violation.13Office of the Law Revision Counsel. 26 U.S. Code 7203 – Willful Failure to File Return, Supply Information, or Pay Tax Tax evasion, meaning intentional concealment of income or deception, is a felony punishable by up to $100,000 in fines and up to five years in prison.14Office of the Law Revision Counsel. 26 USC 7201 – Attempt to Evade or Defeat Tax Criminal prosecution is rare, but the civil penalties alone are reason enough to stay current.
If You Can’t Finish or Can’t Pay by April 15
Running out of time and running out of money are different problems with different fixes. Filing Form 4868 gives you an automatic extension until October 15 to submit your paperwork without triggering the failure-to-file penalty.15Internal Revenue Service. Get an Extension to File Your Tax Return An extension to file is not an extension to pay.16Internal Revenue Service. Taxpayers Should Know That an Extension to File Is Not an Extension to Pay Taxes You still need to estimate what you owe and pay it by April 15 to avoid interest and the failure-to-pay penalty. The extension only buys you time to finalize the paperwork.
If the problem is the balance itself, the IRS offers structured payment plans. A short-term plan gives you up to 180 extra days to pay in full if you owe less than $100,000 in combined tax, penalties, and interest. A long-term installment agreement allows monthly payments for up to 72 months if your balance is under $50,000.17Internal Revenue Service. IRS Payment Plan Options – Fast, Easy and Secure Interest and the failure-to-pay penalty keep accruing on a plan, but the combined cost stays far below what you’d face by not filing.
Free Help So Cost Isn’t the Reason to Skip
You don’t necessarily need to pay someone to prepare your return. The IRS Free File program provides free access to tax preparation software for taxpayers with adjusted gross income of $89,000 or less.18Internal Revenue Service. 2026 Tax Filing Season Opens With Several Free Filing Options Available The IRS also partners with community organizations through the Volunteer Income Tax Assistance program, which offers free in-person help to people who generally earn $69,000 or less, as well as those with disabilities or limited English proficiency.19Internal Revenue Service. Free Tax Return Preparation for Qualifying Taxpayers Professional preparation fees for a basic individual return typically run between $100 and $400 if you’d rather hire someone. Given that the average refund and credits at stake often run into the thousands, the cost of filing rarely outweighs the cost of not.