Guide to Filling Out a W-2 Form

Quick answer

• The W-2 form reports your annual wages and taxes withheld to the IRS and Social Security Administration.
• Employers are responsible for preparing and distributing W-2s by January 31st each year.
• You’ll use your W-2 to file your federal and state income tax returns.
• Key information includes your wages, Social Security tax, Medicare tax, and federal/state income tax withheld.
• If you don’t receive your W-2 by mid-February, contact your employer or the IRS.
• Double-check all information for accuracy before filing your taxes.

Who this is for

• Employees who received wages from an employer during the previous tax year.
• Individuals preparing to file their annual income tax returns.
• Anyone needing to understand the tax information reported on their W-2.

What to check first (before you act)

Your Employment Status

Confirm that you were an employee and not an independent contractor. Independent contractors receive a 1099-NEC form, not a W-2. If you were classified as a contractor but believe you should have been an employee, you may need to discuss this with your employer or consult a tax professional.

Employer Information

Ensure your employer’s name, address, and Employer Identification Number (EIN) are correctly listed. This information is crucial for the IRS to match the form to the correct entity.

Your Personal Information

Verify that your Social Security number (SSN), name, and address are accurate as they appear on your Social Security card. Any discrepancies can cause issues with your tax filing.

Step-by-step (simple workflow)

1. Obtain Your W-2 Form

What to do: Request your W-2 form from your employer. It should be mailed to your address on file or made available electronically.
What “good” looks like: You have received a copy of your W-2 form by the end of January.
Common mistake and how to avoid it: Waiting until the last minute to request it. Avoid this by checking your employer’s policy on W-2 distribution and proactively reaching out if you haven’t received it by early February.

2. Verify Employer Information

What to do: Check Box ‘c’ (Employer identification number) and Box ‘d’ (Employer’s name, address, and ZIP code).
What “good” looks like: The EIN and employer details are accurate and match what you expect.
Common mistake and how to avoid it: Assuming the employer information is correct. Avoid this by comparing it to previous W-2s or official correspondence from your employer.

3. Verify Employee Information

What to do: Review Box ‘a’ (Your social security number), Box ‘e’ (Your first name and initial, last name), and Box ‘f’ (Your address and ZIP code).
What “good” looks like: Your SSN, name, and address are exactly as they appear on your Social Security card and other official documents.
Common mistake and how to avoid it: Typos in your SSN or name. Avoid this by carefully comparing each digit and letter to your Social Security card.

4. Check Wages and Salary (Box 1)

What to do: Examine Box 1 (Wages, tips, other compensation). This reflects your taxable wages.
What “good” looks like: The amount in Box 1 aligns with your understanding of your gross pay for the year, minus any pre-tax deductions like 401(k) contributions.
Common mistake and how to avoid it: Confusing Box 1 with total earnings. Box 1 is taxable wages, which may be less than your total gross pay due to pre-tax deductions.

5. Review Federal Income Tax Withheld (Box 2)

What to do: Look at Box 2 (Federal income tax withheld). This is the amount of federal income tax your employer has already paid on your behalf.
What “good” looks like: This amount appears reasonable based on your income and how you filled out your W-4 form.
Common mistake and how to avoid it: Not checking if the withholding seems too high or too low. This can lead to a large tax bill or a smaller refund than expected.

6. Examine Social Security Wages and Tax (Boxes 3 & 4)

What to do: Check Box 3 (Social Security wages) and Box 4 (Social Security tax withheld).
What “good” looks like: The Social Security wages do not exceed the annual wage base limit set by the Social Security Administration, and the tax withheld is 6.2% of the wages up to that limit.
Common mistake and how to avoid it: Ignoring the wage base limit. If your wages exceed this limit, Social Security tax should only be withheld up to that limit.

7. Examine Medicare Wages and Tax (Boxes 5 & 6)

What to do: Review Box 5 (Medicare wages and tips) and Box 6 (Medicare tax withheld).
What “good” looks like: The Medicare tax withheld is 1.45% of your Medicare wages.
Common mistake and how to avoid it: Assuming Medicare tax is capped. Unlike Social Security tax, there is no wage base limit for Medicare tax.

8. Check State and Local Taxes (Boxes 17, 19, 20)

What to do: If applicable, review Box 17 (State income tax withheld), Box 19 (Local income tax withheld), and Box 20 (Locality name).
What “good” looks like: These amounts accurately reflect the state and local income taxes you have paid based on your income and tax jurisdiction.
Common mistake and how to avoid it: Overlooking state or local taxes if you work in a state or locality with income tax. Ensure these boxes are filled if they apply to you.

9. Review Other Boxes

What to do: Scan other boxes like Box 12 (Codes for various deductions and benefits) and Box 14 (Other information).
What “good” looks like: You understand any codes or entries in these boxes, or they are blank if not applicable.
Common mistake and how to avoid it: Not understanding the codes in Box 12. These codes are important for specific tax deductions and credits, so consult IRS instructions or a tax professional if you’re unsure.

10. Use Your W-2 for Tax Filing

What to do: Enter the information from your W-2 into your tax return software or provide it to your tax preparer.
What “good” looks like: All W-2 information is accurately transferred to your tax return.
Common mistake and how to avoid it: Making data entry errors. Double-check every number and code before submitting your return.

Common mistakes (and what happens if you ignore them)

Mistake	What it causes	Fix
Incorrect Social Security Number (SSN)	Tax return rejection, delayed refund, IRS penalties.	Contact your employer immediately to issue a corrected W-2 (Form W-2c).
Missing W-2 form	Inability to file taxes, potential penalties for late filing.	Contact your employer. If they fail to provide it, contact the IRS.
Incorrect wages or withholding amounts	Underpayment or overpayment of taxes, potential penalties, missed deductions/credits.	Request a corrected W-2 (Form W-2c) from your employer.
Typos in name or address	Tax return rejection, delayed refund.	Contact your employer to issue a corrected W-2 (Form W-2c).
Forgetting to report income from a W-2	Underpayment of taxes, IRS audit, penalties, and interest.	File an amended tax return (Form 1040-X) to report the missing income.
Misinterpreting Box 12 codes	Incorrect tax deductions or credits claimed, leading to underpayment or overpayment.	Consult IRS Publication 15-B or a tax professional to understand the codes.
Not checking for state/local tax withholding	Underpayment of state/local taxes, potential penalties and interest.	Ensure all relevant state and local tax information is accurately reported on your return.
Assuming the W-2 is perfect	Errors carried over to your tax return, leading to issues.	Always verify the accuracy of your W-2 before using it to file.
Using an old W-4 for current year	Incorrect tax withholding throughout the year, leading to surprises at tax time.	Review and update your W-4 form annually or when your life circumstances change.

Decision rules (simple if/then)

• If your W-2 shows a different name or SSN than your Social Security card, then contact your employer immediately because this will cause your tax return to be rejected.
• If you do not receive your W-2 by mid-February, then contact your employer first because they are responsible for issuing it.
• If you were an independent contractor, then you should expect a 1099-NEC, not a W-2, because these forms report different types of income.
• If your W-2 has incorrect wage or tax withholding information, then you must request a corrected W-2 (Form W-2c) from your employer because filing with incorrect data will lead to tax problems.
• If your total wages in Box 3 (Social Security wages) exceed the annual limit, then the Social Security tax in Box 4 should not exceed 6.2% of that annual limit because Social Security tax is capped.
• If you are unsure about the codes in Box 12, then consult IRS Publication 15-B or a tax professional because these codes impact your tax liability.
• If you have multiple W-2 forms from different employers, then you must include information from all of them on your tax return because all earned income must be reported.
• If you believe your employer has incorrectly classified you as an independent contractor, then you may need to file Form SS-8 with the IRS to determine your worker status because this impacts your tax obligations.
• If your W-2 shows state or local income tax withheld, then you must file a state or local tax return because you have already paid taxes to those jurisdictions.
• If you find discrepancies between your pay stubs and your W-2, then investigate the differences with your employer because pay stubs are a good reference point for verifying W-2 accuracy.

FAQ

What is a W-2 form?

A W-2 form, officially called Wage and Tax Statement, is a U.S. federal tax form that employers send to employees and the IRS at the end of each year. It reports the total wages earned and taxes withheld from an employee’s paychecks.

When should I receive my W-2 form?

Employers are required to provide W-2 forms to their employees by January 31st of the year following the tax year. For example, your 2023 W-2 should be sent by January 31, 2024.

What if I don’t receive my W-2 by mid-February?

If you haven’t received your W-2 by mid-February, first contact your employer. If your employer is unresponsive or unable to provide it, you can contact the IRS for assistance.

Can I file my taxes without my W-2?

While you can file without it by estimating your income and withholding, it’s strongly discouraged. You’ll likely need to amend your return later once you receive the W-2, which can cause delays and complications.

What does Box 12 on a W-2 mean?

Box 12 reports various types of compensation or deductions with specific codes. These can include contributions to retirement plans, health savings accounts, or other benefits that may affect your taxable income. You’ll need to refer to IRS instructions for the meaning of each code.

What is the difference between Box 1 and Box 5 on a W-2?

Box 1 reports your taxable wages, tips, and other compensation subject to federal income tax. Box 5 reports your Medicare wages and tips, which are generally all your earnings before taxes, and are subject to Medicare tax.

What if my W-2 has errors?

If you find errors on your W-2, you must contact your employer immediately. They are responsible for issuing a corrected W-2 form, known as a Form W-2c, to accurately report your income and taxes.

Do I need a W-2 if I only worked part of the year?

Yes, if you were an employee and earned any wages, your employer is required to issue you a W-2 form, regardless of how long you worked for them.

What this page does NOT cover (and where to go next)

• Specific tax laws or regulations for your state or locality. Consult your state’s department of revenue or a local tax professional.
• Independent contractor income reporting (Form 1099-NEC). Refer to IRS guidance on contractor income.
• Detailed explanations of all Box 12 codes. For comprehensive details, consult IRS Publication 15-B.
• How to fill out other tax forms like Form 1040 or Schedule C. Refer to IRS instructions or tax software for these.
• Tax advice for complex situations such as self-employment, investments, or foreign income. Consult a qualified tax advisor or CPA.