What Each Box on Your W2 Means

Your W2 shows your wages, taxes withheld, and other income information your employer reported to the IRS. The form has numbered boxes — some on the front, some on the back — and each one reports a specific type of income or deduction. Learning what each box contains helps you spot errors, understand your tax situation, and file your return accurately.

The W2 is divided into two main sections: boxes that affect your federal tax return (boxes 1 through 12 and 14), and boxes that report other information like state taxes, local taxes, and retirement contributions. You do not need to memorize every box, but knowing the most common ones — especially boxes 1, 2, and 5 — will answer most of your questions about what the form says.

Key Takeaways

  • Box 1 shows your taxable wages after pre-tax deductions like health insurance, and this is the number you use on your federal tax return.
  • Box 2 shows federal income tax your employer withheld from your paychecks throughout the year.
  • Boxes 3 and 5 show Social Security and Medicare wages and taxes, which fund those programs.
  • Boxes 12 and 14 report pre-tax contributions to retirement plans, health savings accounts, and other deductions that reduce your taxable income.
  • State and local tax information appears in boxes 15 through 20, and you use these only if you file a state or local return.

Boxes 1 and 2: Your Taxable Wages and Federal Withholding

Box 1 is your federal taxable wages. This is your gross pay minus certain pre-tax deductions — typically health insurance premiums, dental and vision coverage, and dependent care accounts. This is the number you report on your federal tax return (Form 1040, line 1a). If you worked for multiple employers, you will receive a separate W2 from each one, and you add all the Box 1 amounts together when you file.

Box 2 shows the federal income tax your employer withheld from your paychecks. Your employer calculates this based on the W4 form you filled out when you were hired — the one where you claimed dependents and told your employer how much to hold back. This is not a tax you owe; it is money already taken out. When you file your return, the IRS compares this amount to your actual tax liability. If too much was withheld, you get a refund. If too little was withheld, you owe the difference.

Boxes 3 and 5: Social Security and Medicare Information

Box 3 shows your Social Security wages — the amount subject to Social Security tax. For most employees, this is the same as Box 1, but some types of income (like certain retirement contributions) are excluded. Box 4 shows the Social Security tax your employer withheld, which is 6.2% of your Social Security wages.

Box 5 shows your Medicare wages, and Box 6 shows the Medicare tax withheld, which is 1.45% of your Medicare wages. If you earned over a certain threshold (the amount varies by year and filing status), you may also see an additional 0.9% Medicare tax in Box 6. These taxes fund Social Security and Medicare, and they are separate from federal income tax.

Boxes 12 and 14: Pre-Tax Deductions and Retirement Contributions

Box 12 reports pre-tax deductions that reduce your taxable income. Each deduction has a code — a letter that tells you what kind of deduction it is. Common codes include D (401k contributions), E (health savings account contributions), and FF (employer-sponsored health insurance premiums). The amount shown is what you contributed before taxes were calculated, so it lowers your Box 1 wages.

Box 14 is a catch-all for other deductions and information your employer wants to report. This might include union dues, professional licenses, or other employer-specific deductions. Box 14 is informational — it does not directly affect your federal tax return, but you may need it if you itemize deductions or file a state return.

Boxes 15 Through 20: State and Local Taxes

If you worked in a state or city that has income tax, your W2 will have boxes for state and local information. Box 15 shows the state where you worked, Box 16 shows your state taxable wages, and Box 17 shows the state income tax withheld. Boxes 18, 19, and 20 report local tax information in the same way.

You use this information only if you file a state or local tax return. If you worked in multiple states, you will receive separate W2s for each state, and you file a return in each state where you owed tax. Some states do not have income tax, so those boxes will be blank.

Boxes 7, 8, 9, 10, and 11: Less Common Income and Deductions

Box 7 shows tips you reported to your employer (not cash tips you kept). Box 8 shows allocated tips if you work in food service or hospitality. Box 9 is rarely used and usually blank. Box 10 shows dependent care benefits your employer provided, and Box 11 shows nonqualified plan distributions — a type of deferred compensation that some executives receive.

Most employees will not see amounts in these boxes. If you do, and you are unsure what they mean, contact your employer's payroll department or a tax professional who can explain how they affect your specific situation.

How to Spot Errors on Your W2

Check your W2 against your final paystub from the year. Box 1 should match the year-to-date gross pay on that paystub (minus any bonuses or final payments issued after the W2 was prepared). Box 2 should match the year-to-date federal tax withheld. If the numbers do not match, contact your employer's payroll department and ask them to issue a corrected W2 (called a W2-c).

Also verify your name, address, and Social Security number at the top of the form. If any of these are wrong, the IRS may not match your return to your tax record, which can delay your refund or cause other problems. Your employer should correct these errors and send you a corrected form before you file.

Frequently Asked Questions

What if my W2 shows a different amount than my last paystub?

W2s are prepared in January or early February and may not include bonuses, commissions, or final paychecks issued in late December or early January. Compare your W2 to your year-to-date paystub from December, not just your final check. If there is still a discrepancy, contact payroll.

Do I need to report all the boxes on my tax return?

No. You report Box 1 on your federal return. Boxes 2 through 6 are informational — the IRS already knows these amounts. Boxes 12 and 14 may affect your deductions depending on your situation. State and local boxes go on your state return only.

What does it mean if Box 1 is much lower than my gross pay?

Box 1 is your taxable wages after pre-tax deductions. If you contribute to a 401k, health insurance, or a health savings account, those amounts are subtracted before Box 1 is calculated. This is normal and actually lowers your federal tax bill.

Can I file my taxes without my W2?

The IRS has a copy of your W2 from your employer, so you could file without it, but you might report the wrong amount. Wait for your W2 to arrive (by January 31) or contact your employer if it is late. If you file before receiving it and report incorrect wages, you will have to file an amended return.

What if I received a W2 from an employer I do not recognize?

Contact that employer to verify you worked there. If you did not, ask them to issue a corrected W2 showing zero wages. If you believe the W2 is fraudulent, report it to the IRS using Form 14039 (Identity Theft Affidavit).