W-2 vs. W-4: What Is the Difference?

A W-4 tells your employer how to calculate federal income tax withholding from future paychecks, while a W-2 reports the wages you received and taxes withheld during the previous calendar year. You complete the W-4 and give it to your employer, usually when you start a job or when you want to update your withholding instructions. Your employer prepares the W-2 after the year ends and provides it to you for your tax records and tax return. The forms are connected because your W-4 helps guide withholding that is later reported on your W-2. Neither form by itself determines whether you will receive a refund or owe tax, since that result depends on your complete tax return.

W-2 and W-4 at a Glance

A useful way to remember the distinction is that the W-4 is an input and the W-2 is an annual output. You give payroll information through the W-4 so it can calculate withholding during the year. After the year ends, your employer uses payroll records to prepare the W-2.

What Does a W-4 Do?

Form W-4, formally called the Employee's Withholding Certificate, provides information your employer uses to calculate federal income tax withheld from your pay. It is a set of payroll instructions rather than a report of income from a completed tax year. The withholding is intended to help cover income tax you may owe when you file, but it does not guarantee that the amount withheld will match your final tax bill.

You generally complete a W-4 when you start a job. You can also submit an updated form if your circumstances or withholding preferences change. A change in filing status or a new dependent may prompt you to review it. So might starting another job or deciding to request additional withholding.

The W-4 applies to future paychecks. Reviewing it after a significant change can help bring withholding closer to your circumstances. Employees often complete it as part of new-hire onboarding and can update it later.

What Does a W-2 Report?

Form W-2, Wage and Tax Statement, is prepared by your employer from payroll records after the calendar year ends. It reports compensation and withholding for that year. Unlike the W-4, it is not a form you complete to set payroll instructions.

A W-2 typically reports total wages and federal income tax withheld. It also reports Social Security and Medicare wages and taxes. State and local wage or withholding information may appear when applicable. The form gives you figures to use when preparing your tax return and records to retain for your files.

Federal income tax withholding is distinct from Social Security and Medicare taxes. The W-2 reports these amounts in separate fields, and FICA and federal income tax are not the same tax.

How Do the Forms Work Together?

The forms serve different stages of the same payroll cycle. You give your employer a W-4 to guide withholding. Payroll then pays your wages and withholds taxes during the year. After the year ends, your employer totals the relevant wage and withholding information and prepares your W-2. You use that year-end statement when completing your tax return.

For example, if you start a job in spring and complete a W-4 during onboarding, its instructions generally apply to paychecks after you submit it. Early the following year, your employer provides a W-2 reporting wages and withholding for the part of the year you worked. The W-4 is used in your employer's payroll process, while the W-2 is a year-end record for you.

For organizations managing payroll across many employees, an employer of record or payroll provider may help coordinate W-4 collection and W-2 issuance. These services support payroll administration. Employees still benefit from reviewing their withholding information and checking year-end statements for accuracy.

When Are W-2s Due?

Employers generally must furnish W-2s by January 31 following the calendar year being reported. If that date falls on a weekend or legal holiday, the deadline moves to the next business day. For 2026, the deadline is February 2. This is because January 31 falls on a Saturday that year.

If you have not received your W-2 when expected, check your employer's payroll portal or contact payroll or human resources. Confirm that your mailing address is current and ask whether the form was issued electronically.

Common Questions About W-2s and W-4s

Do I Send My W-4 to the IRS?

No. Give your W-4 to your employer so payroll can apply your withholding instructions. Your employer uses the information in its payroll process.

Do I File My W-2 with My Tax Return?

Use the wage and withholding figures from your W-2 to prepare your return. With an electronic return, the information is generally reported electronically rather than by mailing the physical form. If you file on paper, follow the return instructions to determine whether to attach a copy.

Can I Change My W-4 During the Year?

Yes. You can submit an updated W-4 when your household circumstances, income sources, or withholding preferences change. Payroll applies the new instructions to future paychecks.

Does a W-2 Tell Me Whether I Will Get a Refund?

No. A W-2 shows wages and withholding, but it does not account for everything on your tax return. Your refund or balance due depends on your overall tax situation, including other income, deductions, and credits.

How to Keep the Forms Straight

Complete your W-4 carefully when you start a job and review it when relevant circumstances change. Check your pay stubs periodically to see how withholding is being applied. After the year ends, look for your W-2 and compare its information with your own records before preparing your return. Contact payroll promptly if a form is missing or its information appears incorrect.

*This article is for general informational purposes only and is not legal advice.