What Is a W-2?

A W-2 is the form your employer sends you each January summarizing how much you earned the previous year and how much was withheld for taxes. You need it to file your federal and state income tax returns. If you worked as an employee in the U.S. last year, a W-2 is coming — and knowing how to read it makes tax season much less mysterious.

Quick answer: what a W-2 is

Form W-2 (Wage and Tax Statement) is an IRS form that employers must send to every employee who earned at least $600 in wages during the year. It reports total wages, tips, and other compensation, plus the federal income tax, Social Security tax, Medicare tax, and any state or local taxes withheld from your paychecks. You use it to fill out your tax return and prove how much was already paid on your behalf.

When you should expect your W-2

Employers are required to send W-2s by January 31 each year for the prior calendar year. You can receive yours by mail or, if your employer offers it, electronically through a payroll portal. If it’s after the first week of February and you still don’t have one, contact your employer’s HR or payroll office. If they can’t produce it, the IRS has a process for filing without one (Form 4852, a substitute statement).

Who gets a W-2 vs. a 1099

You get a W-2 if you’re classified as an employee — meaning the employer takes taxes out of your paycheck and pays the employer share of payroll taxes on your behalf.

You get a 1099 instead if you’re classified as an independent contractor, freelancer, or self-employed person. With a 1099, no taxes are withheld from your payments — you’re responsible for paying them yourself.

Some workers get both in the same year — for example, someone who switches from a W-2 job to freelancing in the middle of the year, or someone who has a regular job plus side gig income.

How to read your W-2

A W-2 has labeled boxes. The most important ones for filing your taxes:

Boxes a–f: identification

Your Social Security number, the employer’s ID number, and both addresses. Make sure your name, SSN, and address are correct — errors here cause IRS matching problems.

Box 1: Wages, tips, other compensation

Total taxable wages for federal income tax purposes. This is the number that goes on your tax return as wage income. Note: it’s usually less than your gross salary because pre-tax deductions like 401(k) contributions and health insurance premiums are excluded.

Box 2: Federal income tax withheld

How much your employer sent to the IRS on your behalf throughout the year. This counts toward what you owe — if it’s more than your tax bill, you get a refund.

Boxes 3 and 4: Social Security wages and tax

Box 3 shows wages subject to Social Security tax (capped at the annual wage base). Box 4 shows the 6.2% withheld for Social Security.

Boxes 5 and 6: Medicare wages and tax

Box 5 shows wages subject to Medicare tax (no cap). Box 6 shows the 1.45% withheld for Medicare (plus any additional surtax for high earners).

Box 12: special items

Coded entries for things like 401(k) contributions (Code D), HSA contributions (Code W), employer-paid health insurance (Code DD), and various other items. Some affect your tax return, some are informational.

Box 13: special status checkboxes

Indicates if you’re a statutory employee, participated in a retirement plan, or received third-party sick pay.

Boxes 15–20: state and local taxes

State wages, state tax withheld, and any local tax info. Most states use box 16 wages on the state return.

Why Box 1 is often less than your gross salary

A common surprise: someone earning $60,000 sees Box 1 showing $54,000 (or less). The difference is pre-tax deductions:

• 401(k) or 403(b) contributions — reduce Box 1 but not Box 3 or 5 (Social Security and Medicare wages)
• Pre-tax health insurance premiums — reduce all three
• FSA (flexible spending) and HSA contributions through payroll — usually reduce all three
• Pre-tax commuter benefits — reduce Box 1, 3, and 5

That’s why two boxes can show different numbers on the same W-2 — they reflect what was taxable for different purposes.

What to do with your W-2

1. Check the basics. Confirm your name, address, and Social Security number are correct. Errors should be reported to your employer for a corrected W-2 (Form W-2c).
2. Compare to your final pay stub. Box 1 wages should roughly match year-to-date taxable wages on your last pay stub of the year. Differences are usually explained by pre-tax deductions.
3. Use it to file your tax return. Either type the numbers into tax software, give the form to a tax preparer, or file a paper return.
4. Keep a copy. Hold onto the W-2 (paper or electronic) for at least 3 years — the IRS can audit returns going back that far.

What if you have multiple W-2s

If you worked for more than one employer, expect a separate W-2 from each. All wages and withholdings are reported on the same federal tax return — you add Box 1 from all W-2s together for total wages, Box 2 together for total federal withholding, and so on.

One thing to watch: if your combined Social Security wages from multiple employers exceed the annual wage base, you may have overpaid Social Security tax. The excess is refundable through your tax return.

Lost or missing W-2

If your W-2 doesn’t arrive by mid-February:

1. Contact the employer’s HR or payroll office and request a duplicate.
2. If you can’t reach the employer or they refuse, contact the IRS at 800-829-1040. The IRS can prompt the employer.
3. If you still don’t have it by the tax filing deadline, file Form 4852 (a substitute W-2) using your final pay stub of the year.

Don’t skip filing because the W-2 is missing — the IRS expects the return regardless.

Common mistakes

• Confusing gross salary with Box 1 wages. They’re usually different because of pre-tax deductions.
• Throwing the W-2 away after filing. Keep it at least 3 years.
• Filing without a W-2 you know is coming. Wait until you have all of them — filing early without all your forms means amending later.
• Not checking that your name and SSN match Social Security records. Mismatches can delay your refund and corrupt your earnings record.

What to do next

When your W-2 arrives, don’t just stuff it in a drawer. Open it, check the boxes against your final pay stub, and confirm your personal information is right. Then keep it with your other tax documents until you’re ready to file. The few minutes you spend reviewing it now can save days of correction later if there’s an error.

Further Reading

• How to Read a Pay Stub
• Gross Pay vs. Net Pay
• What Is FICA on Your Paycheck?
• What Is a W-4?
• What Is a 1099?
• Money Basics

This article is for general educational purposes only and does not constitute financial advice. Rules and rates change — verify specifics with your bank, employer, or a qualified advisor before acting.