How do I fix no federal taxes being taken out of my paycheck?

Fixing zero federal withholding is a paperwork process, not a phone call to the IRS: you submit a new Form W-4 to your employer, and payroll must apply it going forward. The IRS's tax withholding for employees page describes the W-4 as the control lever for withholding, and its Tax Withholding Estimator is the official tool for figuring out what to put on it. Here's the process in order.

Step 1: Confirm what's actually happening

Pull a recent pay stub and find the federal income tax line — it's usually labeled something like "Fed W/H" or "FIT." Two things to check:

• Is it zero on this stub, or zero year-to-date? A single zero paycheck can be a one-off (a small check, a correction run). A zero year-to-date figure means the setting itself produces nothing.
• Are Social Security and Medicare being withheld? If those lines show amounts but federal income tax is zero, you're being treated as an employee and the issue is your withholding calculation — see our page on why no federal tax was withheld for the common causes. If nothing is withheld at all, ask whether you've been classified as an independent contractor, which is a different situation entirely.

Step 2: Find out what W-4 your employer has on file

Ask payroll or check your HR portal. The usual culprits are a W-4 marked "Exempt," a filing status that doesn't match your situation, or Step 3 credit amounts and Step 4(b) deduction entries large enough to zero out the calculation. The rules for when someone can validly claim exemption from withholding are in IRS Publication 505 — and an exemption claim doesn't carry forward forever; it has to be renewed, or withholding reverts.

Step 3: Run the IRS Tax Withholding Estimator

Before filling out a new form, run your numbers through the Tax Withholding Estimator. You'll want your most recent pay stubs and last year's return handy. The tool projects your full-year tax, compares it to your withholding so far, and tells you specifically what to enter on a new W-4 to close the gap — including how much extra per paycheck to request if you're behind.

Step 4: Submit a new W-4

Fill out a fresh W-4 and give it to your employer (paper or through the payroll portal — the form goes to your employer, not the IRS). The relevant moves:

• Don't write "Exempt" if you expect to owe tax.
• Correct the filing status in Step 1(c).
• Revisit Steps 3 and 4(b) if credits or deductions were overstated.
• Use Step 4(c) for extra withholding — a flat additional amount taken from each remaining paycheck, which is the standard way to catch up after months of zero withholding.

Our guide to what each section of the W-4 actually does walks through the form line by line.

Step 5: Verify it took effect

Employers apply a new W-4 within a payroll cycle or two, per the IRS withholding guidance for employees. Check your next stub or two and confirm the federal line is no longer zero and roughly matches what the estimator projected. Withholding only applies to future paychecks — it can't be applied retroactively to checks already paid.

If part of the year is already gone

Withholding isn't the only prepayment channel. Publication 505 also covers quarterly estimated tax payments, the mechanism the system provides for income that withholding didn't cover. And whatever the prepayments look like, the final accounting happens on the return itself — general filing rules are collected in IRS Publication 17, and our overview of how withholding fits into the paycheck explains where each piece lands.