Updated for tax year 2026

Understanding W-2 Forms in 2026

Every box on Form W-2 explained, why Box 1 is less than your gross salary, when to expect it, and the most common issues recipients hit.

What is a W-2 form?

Form (Wage and Tax Statement) is the year-end document every US employer must send to every employee they paid wages to during the calendar year. It reports your total earnings, taxes withheld, retirement contributions, and other compensation. The IRS receives a copy from the Social Security Administration — they cross-check your tax return against the W-2 your employer filed, so what you report must match what's on the form.

W-2s arrive by January 31 each year for the prior tax year's wages. The form is structured around numbered boxes — Box 1 shows your federally taxable wages (often less than your gross salary because of pre-tax deductions), Box 2 shows federal income tax withheld, Boxes 3-6 cover Social Security and Medicare wages and taxes, and the remaining boxes cover state/local tax, retirement plan contributions, and various informational codes. For tax year 2026 the Social Security wage base is $184,500 (the cap on Box 3 earnings).

If you had multiple employers in the year, you'll receive a separate from each. All of them combine on your federal tax return — no need to file separately. The table below explains every box.

Every W-2 box explained

The W-2 has 20 numbered boxes plus 5 lettered boxes (a–f) for identifying information. Here are the boxes you'll actually need to understand:

BoxWhat it reports
Box 1Wages, tips, other compensation
Box 2Federal income tax withheld
Box 3Social Security wages
Box 4Social Security tax withheld
Box 5Medicare wages and tips
Box 6Medicare tax withheld
Box 7Social Security tips
Box 8Allocated tips
Box 10Dependent care benefits
Box 12Codes (D=401k, DD=health, W=HSA, etc.)
Box 13Checkboxes: statutory employee / retirement plan / third-party sick pay
Box 14Other (employer-defined)
Box 15-20State/local info

Why is Box 1 less than my gross salary?

Box 1 reports federally taxable wages — your gross salary minus pre-tax deductions. The most common items that reduce Box 1 without reducing Boxes 3 and 5 (Social Security/Medicare wages):

Traditional contributions ($24,500 max for 2026, $32,500 if 50+, $35,750 if 60-63 super catch-up), contributions ($4,400 single / $8,750 family for {year}), dependent care contributions ($5,000), commuter benefits ($315/mo for {year}), and pre-tax health insurance premiums all reduce Box 1. They do NOT reduce Boxes 3 and 5 — FICA still applies. So a 401(k)-maxing employee often sees Box 3 (Social Security wages) significantly higher than Box 1 (federal taxable wages).

When should you expect your W-2?

Employers must send W-2s to employees by January 31 for the prior tax year. They can mail it or provide it electronically (with your consent). Most major employers offer electronic delivery through ADP, Workday, Gusto, or Paychex portals — usually available before the paper copy arrives.

If your hasn't arrived by mid-February, contact your employer first. They may have used a stale address or had a delivery issue. If they don't respond or no longer exist, call the IRS at 1-800-829-1040 after February 15. The IRS will contact the employer, and if the W-2 still doesn't materialize, you can file with Form 4852 (Substitute for W-2) using your final pay stub of the year as the source of numbers.

4 common W-2 issues to know about

Box 1 doesn't match your gross salary

This is by design, not an error. Pre-tax deductions (401(k), HSA, FSA, health insurance, commuter benefits) reduce Box 1 below your gross. If you're trying to verify your year's earnings, add Box 1 + Box 12 amounts coded D (401k) + W (HSA) + DD (health insurance value, informational only). For Social Security/Medicare verification, use Boxes 3 and 5.

Working in multiple states

If you physically worked in or were paid for work performed in more than one state, the W-2 may show multiple state rows in Boxes 15-20. Each state may require its own tax return. Some states have reciprocity agreements (NJ-PA, IL-IA, VA-MD-DC, MI-IL, KY-OH-VA, IN-KY-MI-OH-PA-WI, MN-ND-WI, MT-ND, AZ-CA) where you only pay tax to your residence state. Verify your employer withheld correctly — they sometimes default to the work-location state.

Multiple W-2s from the same employer

Sometimes employers issue corrected W-2s (Form W-2c) if they discovered an error after the original. Use the W-2c, not the original — but keep both. If you have legitimately multiple W-2s from the same employer for different work classifications (e.g., regular employee + tipped employee), combine them on your return as a single source.

Box 12 codes confusing you

Box 12 holds informational codes for retirement, health, and other compensation items. Most common: D = 401(k) contributions, DD = total cost of employer-sponsored health insurance (informational, not taxable), W = HSA contributions, AA = Roth 401(k) contributions, EE = Roth 457(b). Code DD is just IRS reporting for ACA purposes — it never affects your tax bill. Code D reduces Box 1 (pre-tax 401(k)); Code AA does NOT reduce Box 1 (Roth is post-tax).

See your real take-home from your W-2

Our salary calculator factors in federal tax brackets, FICA, state income tax, and pre-tax deductions to show what actually ends up in your bank account from each paycheck. Enter your gross salary and state to see the breakdown.

W-2 Forms FAQ