How to Read Your W-2 Form: Box‑by‑Box Breakdown

Here's a complete box‑by‑box breakdown of the 2026 W‑2 form — what each number means, why it matters, and how to check for mistakes.

Box 1: Wages, Tips, Other Compensation

This is your total taxable wages for the year. It includes:

• Salary and hourly wages
• Bonuses and commissions
• Tips (if over $20/month)
• Taxable fringe benefits (e.g., company car, gym membership)
• Pre‑tax deductions (401(k), health insurance, HSA, etc.) are excluded from Box 1

Box 2: Federal Income Tax Withheld

The total amount of federal income tax withheld from your paychecks. This is the amount you've already paid toward your federal tax liability.

Check this: Compare Box 2 to your previous year's withholdings. If it's significantly different, review your W‑4 withholding form.

Box 3: Social Security Wages

The amount of wages subject to Social Security tax. This includes most of the same items as Box 1, but pre‑tax deductions are included (they're not excluded from Social Security).

2026 limit: The Social Security wage base is $184,500 in 2026. Wages above this are not subject to Social Security tax (but are subject to Medicare tax).

Box 4: Social Security Tax Withheld

The actual amount of Social Security tax withheld. The rate is 6.2% of Box 3 wages (up to the $184,500 cap).

Box 5: Medicare Wages

Wages subject to Medicare tax. There's no cap on Medicare wages. All wages are subject to Medicare tax.

Box 6: Medicare Tax Withheld

The actual Medicare tax withheld. The base rate is 1.45%. If you earned over $200,000 (single) or $250,000 (married), you'll also see an additional 0.9% in Box 6.

Box 7: Social Security Tips

Reported tips that are subject to Social Security tax (if you work in a tipped industry).

Box 8: Allocated Tips

Tips allocated to you by your employer if you didn't report enough tips. This is usually for restaurant employees.

Box 9: Advance EIC Payments

This box is not used anymore. The Earned Income Credit (EIC) advance payments stopped in 2010. It's left blank.

Box 10: Dependent Care Benefits

The total amount of dependent care benefits (e.g., from a Dependent Care FSA) your employer provided. Amounts over $5,000 ($2,500 if married filing separately) are taxable.

Box 11: Nonqualified Deferred Compensation

Any distributions you received from a nonqualified deferred compensation plan (e.g., stock options, certain retirement plans).

Box 12: Codes — This Is Where It Gets Confusing

Box 12 has up to four lines with letter codes. Each code represents a different type of compensation or deduction:

Box 13: Checkboxes

• Statutory employee: Checked if you're a statutory employee (e.g., certain delivery drivers, traveling salespeople).
• Retirement plan: Checked if you were covered by a retirement plan (401(k), pension, etc.) at work — important for IRA deduction eligibility.
• Third‑party sick pay: Checked if you received sick pay from a third party (e.g., insurance company).

Box 14: Other

This is a catch‑all box for miscellaneous information. Your employer can include anything here, such as:

• Union dues
• Uniform expenses
• Health savings account (HSA) contributions
• State disability insurance (SDI)
• Other after‑tax deductions

Boxes 15–20: State and Local Information

• Box 15: State code and employer's state ID number
• Box 16: State wages — the amount of wages subject to state income tax
• Box 17: State income tax withheld
• Box 18: Local wages — wages subject to local (city/county) tax
• Box 19: Local income tax withheld
• Box 20: Locality name — the city or county where local tax was withheld

Common W-2 Errors to Check

• Box 1 vs Box 3/5 discrepancy: Box 1 should be lower than Box 3/5 if you had pre‑tax deductions. If it's higher, something's wrong.
• Missing Box 12 codes: If you contributed to a 401(k) or HSA, Box 12 should show the amount.
• Wrong state or local taxes: If you worked in multiple states, verify that the correct states and amounts are shown.
• Name/SSN errors: Make sure your name and Social Security number match what's on your tax return.

What to Do If Your W-2 Is Wrong

1. Contact your employer — they can issue a corrected W‑2 (Form W‑2c).
2. If you can't get a corrected W‑2 — use Form 4852 (Substitute for Form W‑2) to estimate your wages and withholdings.
3. Don't file your tax return until you have the correct numbers.

Final Verdict

• Always check your W-2 for errors — even small mistakes can delay your refund.
• Understand Box 12 codes — they affect your tax return and retirement contributions.
• Keep copies of all W-2 forms — you'll need them to file your tax return and for future reference.

Frequently Asked Questions