What each box on your W2 means

Your W2 form reports the wages you earned and taxes withheld during the year. The form has 14 numbered boxes plus several lettered boxes, and each one tells a specific part of your income story. Reading it correctly matters because you need the numbers to file your tax return, and mistakes on the form can delay your refund or trigger an audit.

The W2 is divided into two main sections: boxes 1 through 14 on the left side report your income and withholdings, and boxes a through f on the right side contain your personal and employer information. Your employer is required to send you a copy by January 31 each year, and they also send a copy to the IRS and your state tax authority.

Start by checking the employer information in boxes a through f — your name, address, and Social Security number should match your records exactly. If any of this information is wrong, contact your employer's payroll department and ask for a corrected form, called a W2-C. Do not file your tax return with incorrect personal information.

Key Takeaways

  • Box 1 shows your taxable wages and is the number you use to calculate federal income tax on your return.
  • Box 2 is the federal income tax your employer already withheld from your paychecks during the year.
  • Boxes 3 and 5 show Social Security and Medicare wages and taxes, which fund those programs and appear on your Social Security record.
  • State and local tax information appears in boxes 19 through 20, and the amounts vary depending on where you worked and where you live.
  • If you worked for more than one employer, you will receive a separate W2 from each one and must report all of them on your tax return.

Boxes 1 and 2: Income and federal withholding

Box 1 shows your total taxable wages for the year. This is the number you report on your federal tax return as income. It includes your salary or hourly wages, bonuses, and some other compensation, but it excludes certain items like health insurance premiums that your employer deducted before calculating your pay.

Box 2 shows federal income tax withheld. This is money your employer took out of your paychecks and sent to the IRS on your behalf. When you file your return, you compare this amount to the total tax you actually owe. If box 2 is larger than what you owe, you get a refund. If it is smaller, you owe the difference.

The amount withheld depends on what you claimed on your W4 form when you started the job. If you claimed too many dependents or exemptions, too little was withheld and you may owe money at tax time. If you claimed too few, too much was withheld and you will receive a refund.

Boxes 3 and 4: Social Security wages and tax

Box 3 shows your Social Security wages — the amount of your pay that is subject to Social Security tax. Box 4 shows the Social Security tax withheld, which is 6.2 percent of your wages up to an annual limit. In 2024, that limit is $168,600, so if you earned more than that, box 3 will show $168,600 even if you made more.

Social Security tax funds your future Social Security benefits and appears on your Social Security record. The Social Security Administration uses box 3 to calculate how much you will receive when you retire, so it is important that this number is accurate. If you worked for multiple employers and each withheld Social Security tax, that is normal — you will not pay double.

Boxes 5 and 6: Medicare wages and tax

Box 5 shows your Medicare wages, which is usually the same as box 1 unless you had certain deductions. Box 6 shows Medicare tax withheld, which is 1.45 percent of your wages with no annual limit. Unlike Social Security tax, Medicare tax continues on every dollar you earn, no matter how much you make.

If you earned over $200,000 as a single filer (or $250,000 if married filing jointly), an additional 0.9 percent Medicare tax applies to wages above that threshold. This additional tax appears in box 6 as well. Medicare tax funds your future Medicare benefits and is separate from Social Security.

Boxes 7 through 14: Other income and deductions

Box 7 shows tips you reported to your employer. If you work in food service, hospitality, or another tipped position, you must report tips to your employer, and they appear here. Box 8 is for allocated tips in certain restaurant situations and is less common.

Box 9 is usually blank. Box 10 shows dependent care benefits your employer provided, such as contributions to a dependent care account. Box 11 shows nonqualified plan distributions, which is rare and applies only to certain deferred compensation plans. Box 12 contains codes and amounts for various pre-tax deductions like health insurance, retirement contributions, or flexible spending accounts.

Box 13 has three checkboxes: "Statutory employee," "Retirement plan," and "Third-party sick pay." These indicate special employment situations. Box 14 is for other income or information your employer wants to report, such as union dues or educational assistance.

Boxes 15 through 20: State and local taxes

Boxes 15 through 17 show your state tax information. Box 15 lists the state where you worked, box 16 shows state income tax withheld, and box 17 shows your state wages. If you worked in more than one state, you will see multiple state sections on your W2.

Boxes 18 through 20 show local tax information in the same format. Not all states and localities have income tax, so these boxes may be blank. If you worked in a city or county with a local income tax, the amounts will appear here. Some people owe state or local tax even if they do not owe federal tax, so check these numbers carefully.

If you worked in a state with no income tax but lived in a state that taxes nonresidents, you may need to file a return in both places. The rules vary significantly by state, so check your state tax authority's website if you worked across state lines.

What to do if something looks wrong

Compare your W2 to your pay stubs from throughout the year. Box 1 should roughly match the total of all your gross pay for the year. Box 2 should match the total federal tax withheld across all your pay stubs. If the numbers do not match, contact your employer's payroll department immediately.

Common errors include wrong Social Security numbers, incorrect names, wages that do not match your records, or tax withholding that seems too high or too low. Your employer can issue a corrected W2-C at any time, but it is faster if you catch the error before January 31. After that date, corrected forms take longer to process.

If your employer will not correct the form or you cannot reach them, you can still file your return using the information you know is correct. Keep records of your pay stubs and any communication with your employer. The IRS will contact you if there is a discrepancy between what you report and what your employer reported.

Frequently Asked Questions

Do I need to report all my W2s on my tax return?

Yes. If you worked for more than one employer during the year, you will receive a separate W2 from each one. You must report income from all of them on your federal tax return, even if one employer did not withhold enough tax. The IRS receives copies of all your W2s and will know if you leave one out.

What if my W2 shows different income than what I think I made?

Check your pay stubs first. Box 1 on your W2 should equal the total gross pay on all your pay stubs for the year. If it does not match, ask your employer to explain the difference — it may be due to unpaid time off, deductions you forgot about, or a calculation error. Request a corrected W2 if the amount is wrong.

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

You can file early if you have all the information you need, but most people wait for their W2 because it contains the exact numbers required. If your employer is late sending it, you can file using estimated income and amend your return later. However, the IRS also receives your W2, so filing without it may delay your refund.

What does it mean if box 12 has multiple codes?

Box 12 can show several different types of pre-tax deductions, each with its own code. Common codes include D for 401(k) contributions, E for health insurance premiums, and G for educational assistance. Each code and amount reduces your taxable income in a specific way, so check your employer's explanation or your pay stubs to understand what each one represents.

Do I need to keep my W2 after I file my tax return?

Yes. Keep your W2 for at least three years in case the IRS has questions about your return. If you claim certain deductions or credits, keep it longer. You may also need it to prove income for a loan, rental application, or other purposes, so storing it safely is a good idea.