A W2 is the tax form your employer sends you showing how much you earned and what taxes were withheld

The W2 form — officially called the "Wage and Tax Statement" — is a document your employer is required to send you by January 31st each year. It shows your total wages for the previous year and lists all the federal, state, and local income taxes your employer took out of your paychecks. You use this form to file your tax return with the IRS.

You receive one W2 for each job you held during the year. If you worked at two different companies in the same year, you'll get two W2s. The form also reports Social Security tax and Medicare tax that were withheld, along with any other deductions like health insurance premiums or retirement contributions.

The W2 is not optional — it's a legal requirement. Your employer must send you a copy and file a copy with the IRS. The IRS uses the W2 your employer files to check that the income and taxes you report on your own tax return match what your employer reported.

Key Takeaways

  • Your employer must send you a W2 by January 31st showing your wages and all taxes withheld during the previous year.
  • You need the W2 to file your federal tax return, and the IRS receives a copy directly from your employer to verify your income.
  • The form reports federal income tax, Social Security tax, Medicare tax, and state or local taxes withheld from your paychecks.
  • If you worked multiple jobs in one year, you will receive a separate W2 from each employer.

The six boxes on a W2 that matter most

A W2 has 14 numbered boxes, but most of them are for specific situations. The ones you'll use when filing your tax return are in the first few rows.

Box 1 (Wages, tips, other compensation) shows your taxable income — the total you earned before any deductions. This is the number you use on your tax return. Box 2 (Federal income tax withheld) shows how much federal tax your employer took out of your paychecks throughout the year. If you overpaid, you get a refund; if you underpaid, you owe more.

Box 3 (Social Security wages) and Box 4 (Social Security tax withheld) show your Social Security earnings and the 6.2% tax withheld. Box 5 (Medicare wages and tips) and Box 6 (Medicare tax withheld) show your Medicare earnings and the 1.45% tax withheld. These are separate from federal income tax and are automatically deducted from every paycheck.

Boxes 12 and 20 may show additional information like health insurance contributions or dependent care expenses. If you see something in these boxes you don't recognize, ask your employer's payroll department what it means.

Where to find your W2 and when to expect it

Your employer must mail or deliver your W2 by January 31st of the year following the one you worked. Many employers now send W2s electronically through a secure portal or email, though some still mail paper copies. Check your email (including spam folders) or log into your employer's payroll system to see if it's available online.

If you haven't received your W2 by early February, contact your employer's payroll or human resources department. Give them a few days to respond — the deadline is January 31st, but processing delays happen. If your employer doesn't send it by mid-February, you can contact the IRS at 1-800-829-1040 and they can help you track it down.

Keep your W2 in a safe place. You'll need it to file your tax return, and you may need it later to prove your income for loans, rental applications, or other purposes. The IRS keeps records, so if you lose your copy, you can request a duplicate from your employer or get a transcript from the IRS.

How a W2 differs from a 1099 or other tax forms

A W2 is for employees — people on a company's payroll who have taxes withheld automatically. A 1099 is for independent contractors and self-employed people who do not have an employer withholding taxes. If you're a contractor, you receive a 1099 instead and are responsible for paying your own taxes quarterly.

The key difference is control and taxes. With a W2 job, your employer controls your schedule and how you work, and they handle tax withholding. With a 1099, you control your own work, but you're responsible for setting aside money for taxes yourself. A W2 also means your employer pays half of your Social Security and Medicare taxes; as a 1099 contractor, you pay both halves yourself.

Other forms you might see include a W2-G (gambling winnings), a 1098-T (education credits), or a 1099-INT (interest income). Each serves a different purpose, but the W2 is the main form for regular employment income.

What to do if your W2 has an error

If the numbers on your W2 don't match your records — for example, if Box 1 shows less income than you earned, or if the tax withheld seems wrong — contact your employer's payroll department immediately. They can issue a corrected W2, called a W2-C, before you file your tax return.

Do not file your tax return with a W2 you believe is wrong. If you file with incorrect information, the IRS will eventually catch the mismatch when they compare your return to what your employer filed. This can trigger an audit or delay your refund. It's much faster to get your employer to correct it first.

If your employer refuses to correct an obvious error or has gone out of business, contact the IRS. You can file Form 4852 (Substitute for Form W-2) with your tax return to report the correct income yourself, but this is a last resort and requires documentation of what you actually earned.

Why the IRS cares about your W2

The IRS receives a copy of every W2 your employer files. They use this to verify that the income you report on your tax return matches what your employer reported. If the numbers don't line up, the IRS will send you a notice asking for an explanation.

This is one reason the W2 system works — your employer is reporting your income to the government whether you like it or not. You can't hide W2 income the way you might try to hide cash tips or side work. The IRS uses W2 data to catch underreporting and to match refunds against what you actually owed.

The W2 also protects you. If your employer fails to withhold the correct amount of tax, the W2 proves what was actually withheld. If you overpaid, you get a refund. If your employer withheld too little, you'll owe more, but at least there's a clear record of what happened.

Keeping your W2 for records and future use

Keep your W2 for at least three years after you file your tax return. The IRS can audit returns going back three years in most cases, and seven years in some situations. If you need to prove your income for a mortgage, car loan, or rental application, a W2 is the strongest proof you can offer.

Store W2s in a file with your other tax documents. If you file electronically, you don't need to mail the W2 to the IRS — they already have it from your employer. But keep your copy for your records. If you file on paper, attach Copy B of your W2 to your return.

Some people keep W2s for their entire working life. This can be useful if you ever need to verify your work history or calculate lifetime earnings for Social Security purposes. Digital copies are fine — scan them and store them securely if you prefer not to keep paper.

Frequently Asked Questions

Do I need a W2 to file my taxes?

Yes, if you had W2 employment income during the year. You cannot file an accurate federal tax return without it. You can file without it, but the IRS will eventually notice the mismatch between your return and what your employer reported, which can trigger an audit or delay your refund.

What if I worked for only part of the year?

You still receive a W2 showing only the income and taxes from the months you worked. If you worked for multiple employers during the year, each one sends a separate W2. You report all of them on your tax return.

Can my employer refuse to send me a W2?

No. Federal law requires employers to send W2s to all employees by January 31st. If your employer refuses or "forgets," you can report them to the IRS or your state's labor department. You can also request a wage and income transcript from the IRS if you need proof of your earnings.

What happens if I lose my W2?

Contact your employer and ask for a duplicate copy. They are required to provide one. If your employer is no longer in business, you can request a wage and income transcript from the IRS by calling 1-800-829-1040 or visiting irs.gov. The transcript shows the same income information as your W2.

Do I need to mail my W2 to the IRS?

No. Your employer files a copy with the IRS directly. You keep your copy for your records and attach it to your paper tax return if you file on paper, but you do not mail it separately. If you file electronically, you do not attach it at all — the IRS already has it from your employer.