What each box on your W2 means

Your W2 form has 14 numbered boxes plus some unnumbered fields. Each box reports a different type of income or tax withholding from your employer. The boxes you use most often are the ones that feed directly into your tax return: Box 1 (wages, tips, and other compensation), Box 2 (federal income tax withheld), Box 5 (Medicare wages and tips), and Box 6 (Medicare tax withheld). The other boxes capture specific kinds of income or deductions that explore only in certain situations.

Your employer fills in these boxes based on what you earned and what they withheld during the year. The form is divided into two main sections: the top half shows your personal information and your employer's information, and the bottom half contains the numbered boxes with dollar amounts. You receive Copy B (for your records), and the IRS receives Copy A. Your employer keeps Copy D, and Copy C goes to your state or local tax authority if you live in a state or city with income tax.

The W2 you receive should match what your employer reported to the IRS and your state. If the numbers don't match your pay stubs or your records, you can ask your employer to issue a corrected W2 (called a Form W2-c) before you file your tax return.

Key Takeaways

  • Box 1 shows your total wages for the year before any deductions; Box 2 shows how much federal income tax your employer withheld.
  • Boxes 5 and 6 report your Medicare wages and the Medicare tax withheld, which are separate from federal income tax.
  • Boxes 12 and 13 report special items like pre-tax contributions to retirement plans or health insurance, which reduce your taxable wages.
  • Your W2 should arrive by January 31 each year, and you can compare it to your pay stubs to catch errors before filing.
  • If your W2 contains errors, you can ask your employer to send you a corrected W2-c form rather than filing with wrong numbers.

Boxes 1 through 6: wages, taxes, and Social Security

Box 1 (Wages, tips, and other compensation) shows your gross income from your job for the year. This is the total amount your employer paid you before any deductions. It includes your regular salary or hourly wages plus any bonuses, commissions, or tips you reported to your employer. It does not include pre-tax deductions like contributions to a 401(k) or health insurance premiums, because those reduce your taxable wages.

Box 2 (Federal income tax withheld) shows the total federal income tax your employer deducted from your paychecks throughout the year. This is the amount that went to the IRS on your behalf. When you file your tax return, you compare this number to the total tax you actually owe. If Box 2 is larger than what you owe, you receive a refund. If it is smaller, you owe the difference.

Box 3 (Social Security wages) and Box 4 (Social Security tax withheld) report your income subject to Social Security tax and the amount withheld. Social Security tax is 6.2 percent of your wages, up to a maximum wage base that changes each year. Your employer withholds an equal amount. If you worked for more than one employer in the same year, you may have overpaid Social Security tax, which you can claim back on your tax return.

Box 5 (Medicare wages and tips) and Box 6 (Medicare tax withheld) report your income subject to Medicare tax and the amount withheld. Medicare tax is 1.45 percent of all your wages with no upper limit. If your total income exceeds a threshold (which varies by filing status), you also owe an additional 0.9 percent Medicare tax on the excess, which your employer withholds if you cross that threshold.

Boxes 12 and 13: pre-tax deductions and special items

Box 12 reports pre-tax deductions and other special compensation. Each item in Box 12 has a letter code that tells you what kind of deduction it is. Common codes include D (401(k) contributions), E (403(b) contributions for nonprofit employees), F (403(b) catch-up contributions), G (403(b) income), H (health savings account contributions), and S (pre-tax dependent care contributions). The dollar amount next to each code shows how much you contributed to that account or benefit during the year.

These deductions reduce your taxable wages in Box 1. For example, if your gross pay was $50,000 and you contributed $5,000 to a 401(k), Box 1 will show $45,000, not $50,000. This is why Box 1 is often lower than the total you see on your first pay stub of the year.

Box 13 contains three checkboxes that indicate whether you are a statutory employee, a deceased employee, or a part-time employee. Most people leave this blank. If you are a statutory employee (such as a commission driver or traveling salesman), your employer will check that box, which affects how you report self-employment income and Social Security tax on your return.

Boxes 14 through 20: state and local taxes

Box 14 (Other) is a catch-all for any other information your employer wants to report that does not fit in the other boxes. This might include union dues, educational information, or other employer-provided benefits. The label next to the amount tells you what it is. Most people do not need this information for their federal tax return, but it may be relevant for state or local taxes.

Boxes 15 through 20 report state and local income tax information. Box 15 shows your state, Box 16 shows state income tax withheld, Box 17 shows your state wages, Box 18 shows local income tax withheld, Box 19 shows your local wages, and Box 20 shows the name of your locality. If you worked in a state or city with income tax, these boxes will contain numbers. If you worked only in a state with no income tax, these boxes may be blank.

You use the state and local information on your W2 when you file your state and local tax returns. Some states allow you to claim a credit for taxes withheld in other states if you worked in multiple places during the year.

The top section: your information and your employer's information

The top left of your W2 contains your name, address, and Social Security number. Check that your name and Social Security number are correct. If they are wrong, contact your employer and ask for a corrected W2-c. A mismatch between your W2 and your Social Security number can delay your refund or cause your return to be rejected.

The top right contains your employer's name, address, and Employer Identification Number (EIN). The EIN is a nine-digit number that identifies your employer to the IRS. You do not need to do anything with this information, but it is part of the record that connects your W2 to your employer's tax filings.

Below that are two boxes: one for your employer's state ID number and one for your employer's account number. These are used by state tax authorities to track employer withholding and do not affect your personal tax return.

When to expect your W2 and what to do if it is wrong

Your employer must send you your W2 by January 31 of the year following the tax year. For example, your 2023 W2 must arrive by January 31, 2024. If you do not receive it by early February, contact your employer's payroll or human resources department and ask when it will be sent. If your employer cannot locate it, you can file your tax return without it and then file an amended return once you receive it, though this can delay your refund.

Before you file your tax return, compare your W2 to your pay stubs from throughout the year. Check that Box 1 matches your total gross pay, that Box 2 matches your total federal withholding, and that any pre-tax deductions in Box 12 match what you contributed. If you spot an error, contact your employer when ready and ask for a corrected W2-c. Do not file your return with a W2 you know is wrong, because the IRS will catch the discrepancy and either delay your refund or send you a bill.

If your employer will not issue a corrected W2, you can file your return with the incorrect W2 and then file an amended return (Form 1040-X) once you have the correct information. You can also contact the IRS directly if you believe your employer is not reporting your income correctly, though this process takes longer.

How your W2 connects to your tax return

When you file your federal tax return, you report the information from your W2 on Form 1040. Box 1 (wages) goes on line 1a, Box 2 (federal withholding) goes on line 33, and any other income or deductions from your W2 go on the appropriate lines. If you have multiple W2s from different employers, you add up all the Box 1 amounts and report the total on line 1a.

Your tax software or tax preparer will ask you for your W2 information and fill in these lines automatically. The IRS also receives a copy of your W2 directly from your employer, so they can verify that the numbers you report match what your employer reported. If they do not match, the IRS will contact you or adjust your return.

Frequently Asked Questions

What if I have multiple W2s from different employers?

Add up the Box 1 amounts from all your W2s and report the total on your tax return. Do the same for Box 2 (federal withholding) and any other boxes that explore. You do not file separate returns for each W2; you combine all your income on one return. If you overpaid Social Security tax because you worked for multiple employers, you can claim the overpayment as a credit on your return.

Why is Box 1 lower than my first pay stub?

Box 1 reflects your wages after pre-tax deductions like 401(k) contributions and health insurance premiums are subtracted. Your first pay stub shows your gross pay before these deductions. Over the course of the year, these deductions add up, so your annual Box 1 total is lower than your gross annual pay.

Do I need to report my W2 to my state if I moved during the year?

Yes, if you worked in one state and moved to another, you may need to file tax returns in both states. Use the state wage and withholding information from Box 15 through Box 20 on your W2 to report to the state where you worked. Some states allow credits for taxes paid to other states to avoid double taxation.

Can I file my tax return before I receive my W2?

You can file without your W2 if you have the information from your pay stubs, but the IRS will verify your return against your W2 once it arrives. If the numbers do not match, your refund may be delayed. It is better to wait for your W2 or contact your employer for the information before filing.

What does it mean if Box 12 shows a negative number?

A negative number in Box 12 usually means your employer corrected an error from a previous pay period. For example, if you were overpaid and the employer deducted the overpayment from a later paycheck, it might show as a negative number. Check with your employer's payroll department to understand what the negative amount represents.