W-2
W-2 (Wage and Tax Statement)
Quick Definition
A W-2 (Wage and Tax Statement) is the official IRS form that employers must provide to every employee by January 31 each year. It reports total wages paid and all taxes withheld during the prior tax year — including federal income tax, Social Security, Medicare, and state income tax. Employees use their W-2 to file their annual tax return.
What It Means
The W-2 is the starting point for tax season for most employed Americans. It summarizes your entire year of employment: every dollar you earned, every dollar withheld for taxes, and contributions to various benefit programs.
Employers must send W-2s both to employees and directly to the IRS and Social Security Administration. This means the IRS already knows your wages before you file your return — which is why discrepancies between a filed return and W-2 data are among the most common triggers for IRS notices.
Key W-2 Boxes Explained
| Box | Label | What It Reports |
|---|---|---|
| Box 1 | Wages, tips, other compensation | Total federal taxable wages; does NOT include pre-tax 401k, FSA, health insurance |
| Box 2 | Federal income tax withheld | Total federal income tax withheld from paychecks |
| Box 3 | Social Security wages | Wages subject to SS tax (pre-tax benefits reduce this differently) |
| Box 4 | Social Security tax withheld | 6.2% of Box 3 up to the SS wage base |
| Box 5 | Medicare wages and tips | Usually higher than Box 1 (fewer exclusions) |
| Box 6 | Medicare tax withheld | 1.45% of Box 5 |
| Box 12 | Various codes | Pre-tax 401(k) contributions (code D), Roth 401(k) (code AA), HSA (code W), etc. |
| Box 13 | Statutory employee / Retirement plan | "Retirement plan" box checked limits traditional IRA deductibility |
| Box 14 | Other | State disability, union dues, educational assistance |
| Box 15-17 | State tax info | State wages and state income tax withheld |
Why Box 1 Is Lower Than Your Salary
Box 1 often surprises employees — it is lower than their annual salary. The difference represents pre-tax benefits excluded from federal taxable wages:
| Pre-Tax Benefit | Box 1 Effect |
|---|---|
| 401(k)/403(b) contributions | Excluded from Box 1 |
| Employer-sponsored health insurance premiums | Excluded |
| HSA contributions (employer or employee via payroll) | Excluded |
| FSA contributions | Excluded |
| Dependent care FSA | Excluded (up to $5,000) |
| Commuter benefits | Excluded (up to $315/month, 2024) |
Example: $80,000 salary with pre-tax benefits:
- 401(k): $10,000
- Health insurance: $3,600
- HSA: $2,000
- Box 1 wages: $80,000 - $15,600 = $64,400
The $64,400 is what federal income tax applies to. Box 3 (Social Security wages) may differ because some pre-tax benefits reduce SS wages differently.
Box 12 Codes: The Hidden Detail
Box 12 contains important contribution and compensation data:
| Code | Description |
|---|---|
| D | Pre-tax 401(k)/403(b) contributions |
| AA | Roth 401(k) contributions |
| W | Employer + employee HSA contributions |
| E | Pre-tax 403(b) contributions |
| G | Pre-tax 457(b) contributions |
| DD | Employer-sponsored health coverage cost |
| FF | Qualified small employer HRA (QSEHRA) |
| V | Income from stock options (NQSO) |
What to Do If Your W-2 Is Wrong
W-2 errors happen — incorrect wages, wrong Social Security number, missing pre-tax benefits. Steps to correct:
- Contact your HR or payroll department immediately
- Request a corrected W-2 (Form W-2c)
- Do not file your tax return until you have the corrected form
- If an employer refuses to correct an obvious error, file Form 4852 (substitute W-2) with your return and attach an explanation
W-2 vs. 1099: The Employment Test
The most consequential question for tax purposes: are you an employee (W-2) or an independent contractor (1099)?
| Feature | Employee (W-2) | Independent Contractor (1099) |
|---|---|---|
| Tax form | W-2 | 1099-NEC |
| FICA withholding | Employer withholds and matches | Worker pays full 15.3% SE tax |
| Federal income tax withholding | Employer withholds | Worker pays estimated quarterly taxes |
| Benefit eligibility | Health insurance, 401(k), PTO | Generally no employer benefits |
| Worker's comp / unemployment | Covered | Not covered |
| Work control | Employer directs work | Worker controls how work is done |
Misclassifying employees as independent contractors is a major IRS enforcement area — employers save ~15% on FICA by misclassifying workers, creating significant incentive to do so illegally.
Multiple W-2s: If You Worked Multiple Jobs
If you worked multiple jobs during the year, you receive a W-2 from each employer. Important considerations:
- Each employer withholds independently — they do not know about your other income
- Working two jobs may put you into a higher bracket than either employer assumed
- Over-withholding of Social Security can occur if combined W-2 wages across employers exceed $168,600; claim the excess SS tax as a credit on Form 1040
Key Points to Remember
- W-2s must be sent to employees by January 31 each year
- Box 1 (federal taxable wages) is lower than salary due to pre-tax 401(k), health insurance, HSA contributions
- Box 12 contains key codes for retirement contributions, HSA, and other compensation items
- The "Retirement plan" box 13 being checked limits traditional IRA deductibility above certain income levels
- The IRS receives W-2 data directly from employers — discrepancies with your return generate automatic IRS notices
- Multiple W-2s from multiple jobs may result in under-withholding; adjust W-4 accordingly
Frequently Asked Questions
Q: What if I don't receive my W-2 by February? A: Contact your employer first. If unavailable after a reasonable attempt, contact the IRS at 800-829-1040 after February 15. You can also file using Form 4852 (a substitute W-2) based on your final pay stub, though you should file an amended return once the actual W-2 arrives.
Q: Does my W-2 show my 401(k) balance? A: No. Your W-2 shows how much you contributed to your 401(k) during the year (in Box 12, Code D), but not your account balance or investment performance.
Q: Why is my Box 3 (Social Security wages) different from Box 1 (federal wages)? A: Different pre-tax benefits are excluded from each. Health insurance premiums excluded from Box 1 under a Section 125 plan are also excluded from Box 3. However, 401(k) contributions reduce Box 1 but not Box 3 and 5. This is why Box 3 can be higher than Box 1.
Related Terms
1099
A 1099 is the IRS information return that reports income paid to non-employees — covering freelance income, investment earnings, retirement distributions, and dozens of other non-wage income sources.
Tax Return
A tax return is the official form filed with the IRS each year that reports income, deductions, and credits to calculate the amount of tax owed or refund due — the annual financial reckoning between individual taxpayers and the government.
Tax Bracket
A tax bracket is the range of income taxed at a specific rate in the U.S. progressive tax system, where higher income levels are taxed at higher rates — but only the income within each bracket is taxed at that bracket's rate.
Standard Deduction
The standard deduction is a fixed dollar amount that reduces your taxable income based on your filing status — allowing most Americans to lower their tax bill without itemizing individual deductions.
Taxable Income
Taxable income is the portion of your income subject to federal income tax after subtracting all allowable deductions from your AGI — the number your tax bracket rates are actually applied to.
Tax Deduction
A tax deduction reduces your taxable income, lowering the amount of income subject to federal tax — with the actual tax savings equal to the deduction amount multiplied by your marginal tax rate.
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