If no federal taxes are taken out of your paycheck, you still owe every dollar of that tax when you file, and you’ll likely owe an underpayment penalty on top. Withholding is just the collection method, not the tax itself. Skipping it, whether because you claimed exempt on your W-4, because payroll made a mistake, or because you’ve been classified as a contractor, doesn’t reduce what you owe by a cent. The fix is to figure out which line on your pay stub is actually zero, correct it going forward, and catch up on what’s already been missed before the balance grows any larger.
Which “No Federal Taxes” Are You Looking At
Your pay stub has two separate federal deductions, and they behave very differently.
The first is federal income tax, calculated from IRS withholding tables using the information on your Form W-4. This is the line most people mean when they say “no federal taxes came out.” It can legitimately be zero if your income is low enough or you’ve claimed exempt.
The second is FICA — Social Security tax at 6.2% of wages up to $184,500 in 2026, plus Medicare tax at 1.45% on all wages with no cap.1Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet Wages above $200,000 pick up an additional 0.9% Medicare tax.2Internal Revenue Service. Household Employer’s Tax Guide FICA is not optional. Your employer is legally required to deduct it regardless of what your W-4 says.3Office of the Law Revision Counsel. 26 U.S. Code 3102 – Deduction of Tax From Wages A narrow exception covers students working at the school where they’re enrolled.4Internal Revenue Service. Student Exception to FICA Tax
If both lines are zero, that’s a different problem from just the income tax line being zero. Nothing coming out at all usually means you’ve been paid as an independent contractor rather than an employee, which is covered further down.
Why Your Federal Income Tax Withholding Is Zero
Before you can fix it, you need to know which of these applies.
You Claimed Exempt on Your W-4
Form W-4 has a checkbox for claiming exemption from income tax withholding. To qualify, you must have owed zero federal income tax the prior year and expect to owe zero this year. Exempt status also expires every February, so it needs to be re-filed each year to stay in effect.5Internal Revenue Service. Form W-4, Employee’s Withholding Certificate People sometimes check this box without meeting the requirements, or qualified one year and never updated the form.
Another wrinkle: the redesigned W-4 in use since 2020 no longer has “allowances.” An old form on file with a high allowance count no longer reflects how the system calculates withholding.6Internal Revenue Service. FAQs on the 2020 Form W-4 Submitting a current W-4 resets the calculation.
Your Income Is Below the Standard Deduction
If your annual wages don’t exceed the standard deduction for your filing status, zero income tax withholding may be correct. For 2026, the standard deduction is $16,100 for single filers, $32,200 for married filing jointly, and $24,150 for heads of household.7Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Part-time, seasonal, and student workers often fall below these amounts and legitimately owe nothing.
Payroll Error
Sometimes a new hire’s W-4 never gets processed, or payroll software is misconfigured. If you never submitted a W-4, the default treatment is single filer with no adjustments, which produces some withholding, not zero.6Internal Revenue Service. FAQs on the 2020 Form W-4 A stub that still shows zero after you started with the standard defaults points to an error worth raising with payroll immediately.
What You’ll Owe When You File
The bigger paycheck feels good, but the money isn’t yours. Take a single filer earning $60,000 in 2026. After the $16,100 standard deduction, taxable income is $43,900, which produces roughly $5,000 to $5,500 in federal income tax. With nothing withheld, that whole amount is due in April.
On top of the tax, the IRS charges an underpayment penalty when too little is paid during the year. It works like interest on the amount you should have paid each quarter but didn’t. For the first quarter of 2026, the rate is 7% annually, which is the federal short-term rate plus three percentage points.8Internal Revenue Service. Quarterly Interest Rates The rate resets quarterly, and the total penalty depends on how long each underpayment lasted.
How to Fix Your Withholding Now
Every paycheck that goes by without withholding makes the catch-up harder. Acting in March is very different from acting in October.
Submit a New W-4
Ask payroll for a fresh Form W-4 and complete it accurately. If you previously claimed exempt, remove that election. For one job and no unusual deductions, completing Steps 1 and 5 applies standard withholding for your filing status. To catch up on months already missed, enter a flat dollar amount on Line 4(c), which tells your employer to pull that additional amount from each remaining paycheck.5Internal Revenue Service. Form W-4, Employee’s Withholding Certificate
Use the IRS Tax Withholding Estimator
The IRS Tax Withholding Estimator factors in what you’ve earned and paid so far this year and what you expect to earn for the rest of it, then produces a recommended W-4 configuration. It can generate a pre-filled form to hand to payroll.9Internal Revenue Service. Tax Withholding Estimator This is the most accurate way to dial in a mid-year correction.
Make Estimated Tax Payments
If W-4 changes alone can’t close the gap, or a quarterly deadline has already passed, you can send estimated payments directly to the IRS using Form 1040-ES. The 2026 quarterly deadlines are:10Internal Revenue Service. 2026 Form 1040-ES, Estimated Tax for Individuals
- First quarter: April 15, 2026
- Second quarter: June 15, 2026
- Third quarter: September 15, 2026
- Fourth quarter: January 15, 2027
The January 15 payment isn’t required if you file your 2026 return by February 1, 2027, and pay the full balance with it.10Internal Revenue Service. 2026 Form 1040-ES, Estimated Tax for Individuals Payments can be made through IRS Direct Pay, by card, or by mailing a check with a 1040-ES voucher.11Internal Revenue Service. Estimated Taxes
How to Avoid the Underpayment Penalty
The IRS won’t assess the penalty if any one of these safe harbors is met by the time you file:
- You owe less than $1,000 after subtracting withholding and credits.
- You paid at least 90% of this year’s tax through any combination of withholding and estimated payments.
- You paid 100% of last year’s tax, or 110% if your 2025 adjusted gross income exceeded $150,000 ($75,000 if married filing separately).
Only one bar needs clearing.12Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty The last one is especially useful when income jumps unexpectedly, because you can base payments on last year’s smaller number and pay the rest at filing without penalty.
If a penalty does apply, the IRS calculates it on Form 2210, which splits the year into four payment periods and applies the quarterly interest rate to each underpayment.13Internal Revenue Service. Instructions for Form 2210 (2025) You don’t have to file 2210 yourself; skip it and the IRS will bill you. Filing it can sometimes produce a lower penalty when income or withholding was uneven across the year.
Waivers of this specific penalty are narrow. The IRS recognizes two: a casualty, disaster, or unusual circumstance where the penalty would be unfair; and retirement after age 62 or disability during the current or preceding tax year, when the underpayment was due to reasonable cause rather than neglect.13Internal Revenue Service. Instructions for Form 2210 (2025) The broader first-time abatement the IRS offers for other penalties doesn’t apply here.14Internal Revenue Service. Administrative Penalty Relief Hitting a safe harbor is the reliable protection.
If FICA Is Missing Too, Check Your Worker Status
If nothing at all is being withheld — no income tax, no Social Security, no Medicare — the likely explanation is that you’ve been classified as an independent contractor. Contractors get a 1099-NEC instead of a W-2, and the hiring company withholds nothing. You’d be expected to handle all federal tax yourself, including both halves of Social Security and Medicare as self-employment tax.
Misclassification is a real problem when a company labels you a contractor but treats you like an employee, controlling your schedule, providing tools, and directing how the work gets done. The IRS looks at behavioral control, financial control, and the nature of the relationship, with no single factor being decisive.15Internal Revenue Service. Independent Contractor (Self-Employed) or Employee?
Two forms matter if you believe you’ve been misclassified. Form SS-8 asks the IRS to formally determine your status.16Internal Revenue Service. About Form SS-8, Determination of Worker Status for Purposes of Federal Employment Taxes and Income Tax Withholding Form 8919 lets you pay only the employee’s share of Social Security and Medicare on the wages that should have been withheld, rather than the full self-employment tax, and it credits those wages to your Social Security record for future benefits.17Internal Revenue Service. Form 8919, Uncollected Social Security and Medicare Tax on Wages
One last point that cuts across all of this. Federal law does put the withholding duty on the employer,18Office of the Law Revision Counsel. 26 USC 3402 – Income Tax Collected at Source and an employer that fails to withhold correctly can become liable for the tax it should have collected.19Internal Revenue Service.