What is a W-4 form used for?

A W-4 tells your employer how much federal income tax to withhold from each paycheck. You complete it at a new job or whenever your tax situation changes — marriage, a new child, a second job. It reports no wages; it only sets your filing status, dependent credits, and any extra withholding going forward.

What is the difference between a W-2 and a W-4?

You fill out the W-4 and give it to your employer to set how much tax is withheld going forward — it reports no income. The W-2 is issued by your employer after year-end and reports the wages you actually earned and the tax already withheld. The W-4 is an input; the W-2 is the year-end record.

Do you file a W-4 with the IRS?

No. The W-4 goes only to your employer's payroll department, never to the IRS. Your employer uses it to calculate withholding and keeps it on file for at least 4 years. The IRS only sees the result indirectly, through the tax withheld and reported on your W-2.

What happens if I don't fill out a W-4?

If you don't give your employer a valid W-4, the IRS requires them to withhold as if you were Single with no other adjustments — usually the highest withholding rate. You won't be blocked from working, but more tax comes out of each paycheck until you submit a completed form.

Do I need a new W-4 every year?

Not usually — your existing W-4 stays in effect until you submit a new one. Update it after life changes like marriage, a new dependent, a second job, or a surprising refund or balance due. One exception: if you claim exempt status, you must file a fresh W-4 by February 15 each year to keep that exemption.

Tax

Form W-4 (Employee's Withholding Certificate)

Form W-4, the Employee's Withholding Certificate, is an IRS form an employee completes and gives to their employer to set how much federal income tax is withheld from each paycheck. It is forward-looking and reports no wages or earnings — only filing status, dependents, and adjustments that direct withholding.

To keep exempt-from-withholding status, an employee must give their employer a new Form W-4 claiming exempt by February 15 each year; otherwise the employer withholds as if the employee is Single with no other adjustments.

Source: IRS — Topic No. 753, Form W-4

Written & maintained by the Granite team · Last updated June 2026

Overview

The W-4 is filled out by the employee, not the employer or the IRS. You complete it when you start a new job or want to change your tax withholding, then hand it to your employer's payroll department — it is never filed with the IRS. The information on it tells payroll how much federal income tax to subtract from each paycheck.

Unlike the W-2, which the employer issues after year-end to report wages already paid, the W-4 is forward-looking and reports no income. Steps 1 through 5 cover your name and Social Security number, filing status, dependent credits, optional extra withholding, and your signature. The employer fills in only the bottom "Employers Only" section with their name, EIN, and your first date of employment.

When you’ll get your Form W-4 (Employee's Withholding Certificate)

Starting a new job — every employer requires a W-4 before running your first payroll
Getting married, divorced, or changing your filing status
Having or adopting a child, or a dependent aging out of credit eligibility
Getting a large refund or owing a big balance at tax time and wanting to fine-tune withholding
Picking up a second job or a spouse starting work, which changes combined withholding
Wanting extra tax withheld each pay period to cover side income or avoid underpayment

What’s on your Form W-4 (Employee's Withholding Certificate)

These are the fields Granite reads and extracts automatically the moment you upload one.

Tax year (form revision): The revision year printed on the form, e.g. 2024 — W-4s are reissued annually and the year matters for which worksheet applied.
Step 1(a) — Employee name: Your full legal name as it appears on your Social Security card.
Step 1(b) — Social Security Number: Your SSN, used by payroll to match withholding to your tax record.
Step 1(c) — Filing status: The box you checked: Single or Married filing separately, Married filing jointly / Qualifying surviving spouse, or Head of household.
Step 3 — Dependent and other credits: Total credits claimed for qualifying children and other dependents, which reduces the tax withheld.
Step 4(c) — Extra withholding: Any additional dollar amount you asked your employer to withhold from each paycheck.
Step 5 — Signature date: The date you signed the form; a W-4 isn't valid without your signature.
Employer name & EIN: The "Employers Only" section — your employer's name and Employer Identification Number, often blank on the copy you keep.

How long to keep it

Keep your copy at least 4 years; employers must retain it 4 years after the related tax is due or paid.

Most people throw the W-4 away once payroll processes it, but keeping your own copy lets you verify your filing status and credits if a paycheck looks off or your withholding seems wrong. The IRS requires employers to hold W-4s for at least 4 years, so matching that window means you can settle a withholding dispute with the exact form you submitted.

How Granite handles your Form W-4 (Employee's Withholding Certificate)

Drop your W-4 into Granite and it reads the form, pulls out the revision year, your filing status, dependent credits, and any extra withholding, then titles it "[Your Name] 2024 W-4" and files it into that year's Tax collection alongside your W-2, 1099s, and return. Search "withholding" or "w4" and it surfaces instantly — and Granite links the employer named on it to the rest of that employer's documents.

FAQ

Form W-4 (Employee's Withholding Certificate): common questions

What is a W-4 form used for?: A W-4 tells your employer how much federal income tax to withhold from each paycheck. You complete it at a new job or whenever your tax situation changes — marriage, a new child, a second job. It reports no wages; it only sets your filing status, dependent credits, and any extra withholding going forward.
What is the difference between a W-2 and a W-4?: You fill out the W-4 and give it to your employer to set how much tax is withheld going forward — it reports no income. The W-2 is issued by your employer after year-end and reports the wages you actually earned and the tax already withheld. The W-4 is an input; the W-2 is the year-end record.
Do you file a W-4 with the IRS?: No. The W-4 goes only to your employer's payroll department, never to the IRS. Your employer uses it to calculate withholding and keeps it on file for at least 4 years. The IRS only sees the result indirectly, through the tax withheld and reported on your W-2.
What happens if I don't fill out a W-4?: If you don't give your employer a valid W-4, the IRS requires them to withhold as if you were Single with no other adjustments — usually the highest withholding rate. You won't be blocked from working, but more tax comes out of each paycheck until you submit a completed form.
Do I need a new W-4 every year?: Not usually — your existing W-4 stays in effect until you submit a new one. Update it after life changes like marriage, a new dependent, a second job, or a surprising refund or balance due. One exception: if you claim exempt status, you must file a fresh W-4 by February 15 each year to keep that exemption.

Sources

This page is checked against primary and authoritative sources:

Keep your Form W-4 (Employee's Withholding Certificate) in one place.

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