What Each Box on Your W2 Means

A W2 form has 14 numbered boxes plus several unlabeled ones. Each box reports a different piece of your income or tax information to you and the IRS. The form is divided into two halves: the top half shows your personal information and employer details, and the bottom half shows the actual income and tax numbers.

The boxes you will use most often are Box 1 (wages subject to federal tax), Box 2 (federal income tax withheld), Box 5 (Medicare wages), and Box 6 (Medicare tax withheld). These four boxes contain the numbers you need to file your tax return. The other boxes report specialized income or tax situations — things like tips, dependent care benefits, or non-may have access to stock options — that apply only to certain workers.

Your employer fills out the W2 based on your paychecks throughout the year. If you worked for multiple employers, you will receive a separate W2 from each one. You should receive your W2 by January 31 of the year following the year you worked.

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 from your paychecks.
  • Boxes 3 and 4 report Social Security wages and tax; Boxes 5 and 6 report Medicare wages and tax — these are separate from federal income tax.
  • Boxes 12 and 13 report special types of income or tax situations; if these boxes are blank, you likely do not need to worry about them.
  • The top section of the form contains your name, address, and employer information; check this for accuracy before you file your return.
  • If any number on your W2 looks wrong compared to your final paychecks, contact your employer's payroll department to request a corrected form.

The Top Section: Your Information and Employer Details

The very top of the W2 shows your name, address, and Social Security number on the left side. On the right side is your employer's name, address, and Employer Identification Number (EIN). Check that your name and Social Security number are spelled and numbered correctly — mistakes here can delay your tax refund or cause IRS notices.

Below that are two boxes labeled "Control number" and "Kind of Payer." The control number is a reference your employer uses internally and you can ignore it. The "Kind of Payer" box will say "941" for most employees; other codes indicate special situations like government employment or nonprofit work.

If any information in this section is wrong — your name is misspelled, your address is outdated, or your Social Security number has a typo — ask your employer to issue a corrected W2 (called a W2-C). Do not file your tax return with incorrect personal information.

Boxes 1 Through 6: Wages and Taxes

Box 1 (Wages, tips, other compensation) shows your total taxable wages for the year. This is your gross pay before any deductions. It includes your base salary or hourly wages plus bonuses, commissions, and taxable fringe benefits. It does not include pre-tax deductions like health insurance premiums or 401(k) contributions.

Box 2 (Federal income tax withheld) shows how much money your employer deducted from your paychecks for federal income tax. This is the amount that went to the IRS, not to you. When you file your tax return, you will compare this number to what you actually owe in federal tax. If Box 2 is larger than what you owe, you get a refund. If it is smaller, you owe money.

Boxes 3 and 4 (Social Security wages and tax) report your Social Security income and the Social Security tax withheld. Social Security tax is separate from federal income tax. Your employer withholds 6.2% of your wages for Social Security, up to a wage cap that changes each year. Box 4 will show that amount.

Boxes 5 and 6 (Medicare wages and tax) report your Medicare income and the Medicare tax withheld. Medicare tax is also separate from federal income tax. Your employer withholds 1.45% of your wages for Medicare, with no wage cap. If you earned over $200,000 (or $250,000 if married filing jointly), an additional 0.9% Medicare tax may appear here.

Boxes 7 Through 11: Social Security, Tips, and Dependent Care

Box 7 (Social Security tips) appears only if you received tips and reported them to your employer. This box shows the total tips you reported during the year. If you did not report tips, this box will be blank.

Box 8 (Allocated tips) is used by certain employers in the food and beverage industry to allocate tips to employees. Most workers will not see a number here.

Box 9 (Dependent care benefits) shows the value of dependent care benefits your employer provided — such as a subsidy for daycare or an employer-sponsored dependent care account. This amount is usually not taxable, but it counts toward your income for certain tax purposes.

Box 10 (Dependent care benefits — nontaxable) is rarely used. If it has a number, your employer will explain what it means.

Box 11 (Nonqualified plans) reports distributions from a nonqualified deferred compensation plan or a non-government section 457(b) plan. Most employees will not have a number here. If you do, it means you received a distribution from a special retirement or deferred compensation arrangement.

Boxes 12 and 13: Special Income and Tax Situations

Box 12 can contain multiple entries, each marked with a letter code (A through Z, then AA through DD). Each code represents a different type of income or tax-advantaged benefit. Common codes include D (401(k) contributions), E (403(b) contributions), F (403(b) catch-up contributions), and S (employee stock purchase plan contributions). If Box 12 is blank, you do not have any special income or contributions to report.

Box 13 has three checkboxes: "Statutory employee," "Retirement plan," and "Third-party sick pay." A checkmark in "Retirement plan" means you are covered by a retirement plan at work — this affects whether you can deduct IRA contributions on your tax return. The other two boxes apply only to specific employment situations.

If Box 12 contains codes you do not recognize, or if you are unsure what a code means, ask your employer's payroll department for an explanation. The IRS publishes a full list of Box 12 codes, but your employer can tell you in plain language what each one on your form represents.

Boxes 14 Through 20: State and Local Taxes

Boxes 14 through 20 report state and local income tax information. Box 14 is a catch-all for other information your employer needs to report — it varies by employer and state. Boxes 15 through 20 show state and local wages, tax withheld, and other state-specific information.

If you worked in only one state, you will see that state's information in these boxes. If you worked in multiple states or moved during the year, you may see information for more than one state. Use the state and local tax information on your W2 when you file your state and local tax returns.

Some states do not have income tax. If you worked in one of those states, these boxes will be blank or will show zero.

What to Do If Something Looks Wrong

Compare your W2 to your final paychecks from the year. Box 1 should roughly match the total gross pay shown on those paychecks. Box 2 should match the total federal tax withheld. If the numbers are significantly different, contact your employer's payroll department right away.

Common errors include incorrect Social Security numbers, wrong wage amounts, or tax withheld that does not match your paychecks. Your employer can issue a corrected W2 (Form W2-C) if there is a mistake. Request the correction before you file your tax return — filing with wrong information can trigger IRS notices or delay your refund.

If you worked for an employer but did not receive a W2 by early February, contact the employer first. If they do not respond or say they did not file, you can file Form 4852 (Substitute for Form W-2) with your tax return and contact the IRS at 1-800-829-1040.

Frequently Asked Questions

Why is my Box 1 amount different from my take-home pay?

Box 1 shows your gross wages before any deductions. Your take-home pay is lower because your employer deducted federal income tax (Box 2), Social Security tax (Box 4), Medicare tax (Box 6), health insurance premiums, 401(k) contributions, and other pre-tax deductions. Add up all those deductions and subtract them from Box 1 to get your take-home pay.

Do I need to report every number on my W2 when I file my taxes?

No. You report Box 1 (wages) and Box 2 (federal tax withheld) on your main tax return. Boxes 3 through 6 are informational — Social Security and Medicare taxes are already withheld and do not change your tax return. Boxes 12 and 13 matter only if they contain information specific to your situation, like 401(k) contributions or retirement plan coverage.

What if I received a W2 from a job I only worked at for one month?

You still report it. If you worked for multiple employers during the year, you will receive a separate W2 from each one. Add up the Box 1 amounts from all your W2s to get your total wages for the year, then report that total on your tax return.

Can I file my taxes before I receive my W2?

No. You need the information on your W2 to file accurately. If your employer is late sending your W2, wait until you receive it. If it is mid-February and you still do not have it, contact your employer or the IRS.

What does it mean if Box 12 has a letter code I do not recognize?

Each letter code in Box 12 represents a specific type of income or contribution. Common codes are D (401(k)), E (403(b)), and S (employee stock purchase plan). Ask your employer what the code on your form means. You may need to report it separately on your tax return, or it may be informational only.