What Is a W-2 and How Do I Read It?

If you work for an employer, the W-2 is probably the single most important tax document you receive each year. It tells you — and the IRS — exactly how much you earned and how much tax was already taken out of your paychecks. Understanding what each box on your W-2 means can save you confusion at tax time and help you catch errors before they become problems.

Data Notice: Tax figures and thresholds related to what is w2 cited in this article are projected 2026 values based on IRS guidance and current legislation. Tax law is subject to change. Verify all figures with IRS.gov or a licensed tax professional before making decisions.

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What Is a W-2 Form?

A W-2, formally called a “Wage and Tax Statement,” is a form your employer sends you every January. It summarizes your total earnings for the previous calendar year and breaks down all the taxes that were withheld from your paychecks — federal income tax, Social Security tax, Medicare tax, and state or local taxes.

Your employer also sends a copy directly to the IRS and to your state tax agency. That means the IRS already knows what you earned before you even file your return. The W-2 is how you report that income accurately on your Form 1040.

Who Gets a W-2?

You receive a W-2 if you are classified as an employee — meaning your employer controls when, where, and how you do your work, and they withhold taxes from your pay. This includes full-time workers, part-time workers, and seasonal employees.

If you are an independent contractor or freelancer, you receive a 1099 form instead. The distinction matters because employees and contractors are taxed differently. Employees split payroll taxes with their employer, while contractors pay the full amount through self-employment tax.

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When Do You Get Your W-2?

Employers are required by law to send (or make available) your W-2 by January 31 of the year following the tax year. So for the 2025 tax year, your W-2 should arrive by January 31, 2026.

Many employers now offer W-2s electronically through payroll portals. If you opted into electronic delivery, check your employer’s payroll system (ADP, Gusto, Paychex, Workday, etc.) in late January.

If you haven’t received your W-2 by mid-February, contact your employer’s payroll or HR department first. If that doesn’t work, you can call the IRS at 1-800-829-1040 for assistance. The IRS can contact your employer on your behalf.

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W-2 Boxes Explained: A Box-by-Box Breakdown

The W-2 has many numbered boxes, but you don’t need to understand every single one. Here are the ones that matter most.

Identification Boxes (Letters, Not Numbers)

• Box a — Your Social Security number
• Box b — Your employer’s Employer Identification Number (EIN)
• Box c — Your employer’s name and address
• Box d — A control number your employer uses internally (you can ignore this)
• Box e — Your legal name
• Box f — Your address

Important: Double-check that your name and Social Security number are correct. Even a small typo can delay your refund or trigger an IRS notice.

The Income and Withholding Boxes

Box 1 — Wages, Tips, Other Compensation

This is your total taxable income from this employer for the year. It includes your salary or hourly wages, bonuses, commissions, and tips. It does not include pre-tax deductions like 401(k) contributions, health insurance premiums, or HSA contributions — those have already been subtracted.

Box 1 is the number that flows onto your Form 1040 as wage income.

Box 2 — Federal Income Tax Withheld

This is the total amount of federal income tax your employer took out of your paychecks during the year. The amount depends on the information you provided on your W-4 form — your filing status, number of dependents, and any extra withholding you requested.

If Box 2 is larger than what you actually owe, you get a refund. If it’s smaller, you owe the difference. You can track your refund status using the IRS refund tracker.

Box 3 — Social Security Wages

This is the amount of your earnings subject to Social Security tax. It’s often different from Box 1 because it includes pre-tax deductions (like 401(k) contributions) but is capped at the Social Security wage base — ~$176,100 for 2026. If you earn more than that, Box 3 will show the cap, not your full earnings.

Box 4 — Social Security Tax Withheld

This is the actual Social Security tax taken from your pay. The employee rate is 6.2% of Box 3 wages, up to the wage base. Your employer pays a matching 6.2% on their side, but that doesn’t show on your W-2. For more on how this works, see our guide on payroll taxes.

For 2026, the maximum Social Security tax an employee can pay is ~$176,100 x 6.2% = ~$10,918.

Box 5 — Medicare Wages and Tips

Similar to Box 3, but for Medicare. Unlike Social Security, there is no wage cap for Medicare — all of your earnings are subject to it.

Box 6 — Medicare Tax Withheld

The Medicare tax withheld from your pay. The employee rate is 1.45% of Box 5 wages. If you earned over ~$200,000, an additional 0.9% Medicare surtax applies to wages above that threshold.

Other Important Boxes

Box 12 — Coded Items

Box 12 uses letter codes to report various types of compensation and benefits. Common codes include:

Code	What It Means
D	401(k) contributions (traditional)
E	403(b) contributions
W	Employer HSA contributions
DD	Cost of employer-sponsored health coverage (informational — not taxable)
AA	Roth 401(k) contributions
BB	Roth 403(b) contributions

Code DD often surprises people because it shows a large number, but it’s just informational. You don’t owe tax on it.

Box 13 — Checkboxes

Three checkboxes that indicate special situations:

• Statutory employee — A special category of worker who gets a W-2 but reports income on Schedule C
• Retirement plan — You were eligible for an employer retirement plan (this affects your ability to deduct traditional IRA contributions)
• Third-party sick pay — Sick pay was paid by an insurance company rather than your employer

Boxes 15–20 — State and Local Information

These boxes report your state and local wages and tax withholding. If you worked in multiple states, you may have multiple lines here. You’ll need this information to file your state tax return.

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What If You Have Multiple W-2s?

If you worked for more than one employer during the year, you’ll receive a separate W-2 from each one. When filing your return, you need to add up the totals from all your W-2s.

One thing to watch for with multiple W-2s: each employer withholds Social Security tax independently. If your combined wages exceeded the Social Security wage base (~$176,100 for 2026), you may have had too much Social Security tax withheld. You can claim the excess as a credit on your tax return.

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What If Your W-2 Is Wrong?

Mistakes happen. Common W-2 errors include:

• Wrong Social Security number
• Incorrect wages (often from a mid-year raise or bonus not being reflected properly)
• Wrong state listed

If you spot an error:

1. Contact your employer immediately and ask them to issue a corrected W-2 (called a W-2c)
2. Do not file your return with incorrect information if possible — wait for the corrected form
3. If you can’t get a correction in time, you can file using the information you know is correct, and the IRS can help reconcile later

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What If You Lost Your W-2?

Don’t panic. You have several options:

1. Check your employer’s payroll portal — Most employers keep electronic copies available year-round
2. Contact your employer’s HR or payroll department — They can reissue it
3. Use your last pay stub — Your year-end pay stub often shows the same information as your W-2
4. Request a Wage and Income Transcript from the IRS — You can do this through your IRS Online Account or by filing Form 4506-T. The transcript shows the income information employers reported to the IRS

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W-2 vs. 1099: What’s the Difference?

	W-2	1099
Who gets it	Employees	Independent contractors, freelancers
Taxes withheld?	Yes — federal, state, FICA	Usually no
Who pays payroll taxes?	Split between you and employer	You pay both halves (self-employment tax)
Benefits?	Typically yes (health insurance, 401k)	Typically no
Filed on	Form 1040 (wage income)	Form 1040 + Schedule C

For a detailed breakdown of 1099 forms, see our guide: What Is a 1099 and What Do I Do With It?.

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How Your W-2 Connects to Your Tax Return

Here’s how the key W-2 boxes flow onto your Form 1040:

1. Box 1 (wages) goes onto Form 1040, Line 1a
2. Box 2 (federal tax withheld) goes onto Form 1040, Line 25a — this reduces what you owe
3. Your total income from Box 1 (plus any other income sources) eventually becomes your adjusted gross income (AGI), which determines your eligibility for many credits and deductions

Understanding your W-2 is the first step to understanding your entire tax return. Once you know what each box means, filing your taxes becomes much less intimidating.

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Frequently Asked Questions

Do I need to attach my W-2 to my tax return?

If you file electronically, no — the information is transmitted digitally. If you file a paper return, yes, you should attach Copy B of your W-2.

Can I file my taxes without my W-2?

Technically yes, using Form 4852 as a substitute, but this may delay processing. It’s better to wait for your W-2 or request a Wage and Income Transcript from the IRS.

What if I got a W-2 from a job I only worked at for a few days?

You still need to report it. Any employer who paid you wages and withheld taxes will send a W-2, even if you only worked there briefly.

Is my W-2 the same as my pay stub?

No. Your pay stub shows a single pay period, while your W-2 summarizes the entire year. However, your year-end pay stub and W-2 should show similar totals.

How long should I keep my W-2?

Keep your W-2s for at least 3 years after you file the tax return they relate to. Some tax professionals recommend keeping them for 7 years, and it’s wise to keep them indefinitely for Social Security benefit verification purposes.

When is the deadline to file my taxes with my W-2 information?

The standard tax filing deadline is April 15 (or the next business day if it falls on a weekend or holiday). You can file for an extension, but that only extends the filing deadline — not the payment deadline.

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Tax information is for educational purposes only and does not constitute tax, legal, or financial advice. Consult a licensed tax professional for guidance specific to your situation.