Form W-2 Guide (2026): Wage & Tax Statement Explained

Key Takeaways for 2026 Compliance

Box 1 reports federal taxable wages after pre-tax retirement, Section 125 health, and HSA deductions.
Box 3 Social Security wages are capped at $184,500 for 2026 ($176,100 for 2025); maximum Box 4 tax is $11,439.00.
Box 5 Medicare wages are uncapped; an additional 0.9% surtax applies to wages over $200,000 in Box 6.
Traditional 401(k) contributions (Box 12 Code D) reduce Box 1 income tax, but remain 100% subject to FICA taxes.
Box 12 Code DD (employer healthcare cost) is strictly informational under the ACA and is completely tax-free.
Statutory employer deadline is January 31 (Feb 1, 2027 for TY2026); use Form 4852 if an employer fails to furnish.

Official 2026 Form W-2 Compliance & Reconciliation Portal

Master IRS Form W-2: Line Breakdown, Benefit Codes & FICA Rules

Form W-2 summarizes your annual earnings, retirement contributions, and tax withholdings. Use our interactive inspector to reconcile your taxable income, decode complex Box 12 codes, and generate certified employer inquiry memorandums.

Verify Paystub vs W-2 Math Official IRS W-2 PDF

1. What Is IRS Form W-2 & Who Receives It? (Statutory Framework)

PAA Quick Answer: IRS Form W-2 (Wage and Tax Statement) is an annual federal tax form required under Internal Revenue Code § 6051. Employers must file Copy A with the Social Security Administration (SSA) and issue Copies B and C to every W-2 employee by January 31 following the tax year. It itemizes gross wages, tax withholdings, and pre-tax benefit deferrals.

Every business entity that pays remuneration for services performed by an employee in an employer-employee relationship (defined under common-law principles pursuant to IRC § 3121(d)(2)) must furnish a Form W-2 to each employee from whom income, Social Security, or Medicare tax was withheld or would have been withheld if the employee had claimed no more than one withholding allowance (noting that the redesigned 2020+ Form W-4 eliminated personal allowances in favor of specific dollar-based credit and deduction inputs).

Who Receives Form W-2

Full-time, part-time, seasonal, and temporary employees who submit Form W-4 upon onboarding. Employers control the work process, provide equipment, and withhold payroll taxes directly from each paycheck.

Who Does NOT Receive Form W-2

Independent contractors, freelancers, and gig economy workers who complete Form W-9. Non-employee compensation is reported on Form 1099-NEC with zero tax withholdings.

2. Form W-2 Interactive Inspector & Salary Reconciler

Use our interactive compliance tool below to search any of the 20 boxes on Form W-2, calculate your exact Box 1 vs Box 3 vs Box 5 wage reductions, decode all Box 12 benefit letters, or generate a certified missing W-2 employer demand letter:

STATUTORY PAYROLL COMPLIANCE • IRC § 6051 & SSA PUB 1141

Form W-2 Interactive Inspector & Salary Reconciler

Official 2026 SS Cap: $184,500

ACTIVE COMPLIANCE TOOL

Search any Form W-2 box number or field name to inspect its statutory IRS definition, Form 1040 routing line, FICA taxability, and common payroll errors.

Box aIdentification

Employee's Social Security Number

Your 9-digit Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN). Employers are required by law to print an accurate number for SSA earnings credit.

Form 1040: Form 1040 Header

Statute: IRC § 6109

Audit Rule: Mismatch between Box a and SSA records triggers IRS Notice CP2100/CP2100A or SSA mismatched earnings letter. Must match your Social Security card exactly.

Box bIdentification

Employer Identification Number (EIN)

The 9-digit federal tax ID assigned to your employer (formatted as XX-XXXXXXX). Used by the IRS to cross-reference corporate payroll filings (Form 941 / Form 944).

Form 1040: Form 1040 W-2 Input Screen

Statute: IRC § 6051(a)(1)

Audit Rule: An invalid or missing EIN prevents electronic filing (e-file rejection code F1040-034-01).

Box cIdentification

Employer's Name, Address, and ZIP Code

Legal registered business name and operational address of the employing entity. For multi-state corporations, this may be a centralized payroll processing address.

Form 1040: Form 1040 W-2 Input Screen

Statute: Treas. Reg. § 31.6051-1

Audit Rule: Does not affect tax liability, but must match the business entity filing federal payroll returns.

Box dIdentification

Control Number

An optional internal code generated by your employer’s automated payroll software (e.g., ADP, Paychex, Workday) to uniquely identify your specific statement.

Form 1040: Optional / Internal Payroll Use

Statute: IRS Pub 1141 Specifications

Audit Rule: Completely optional for tax filing. You can leave this blank on tax preparation software with zero penalty.

Box e & fIdentification

Employee's Name and Address

Your full legal name (first, middle initial, last, suffix) and residential mailing address on file with payroll at the close of the calendar year.

Form 1040: Form 1040 Header

Statute: IRC § 6051(a)(2)

Audit Rule: If your last name changed (marriage/divorce), report the name shown on your Social Security card until you formally update the SSA, or file will reject.

Box 1Federal Wages & FIT

Wages, tips, other compensation

Total federal taxable wages paid during the calendar year. Calculated as Gross Annual Earnings minus pre-tax reductions (401k/403b, Section 125 cafeteria plans, HSA/FSA), plus taxable fringe benefits.

Form 1040: Form 1040 Line 1a

Statute: IRC § 3401(a) & § 61

Audit Rule: Primary number used to calculate federal adjusted gross income (AGI). Does NOT match gross paystubs due to pre-tax retirement and health deductions.

Box 2Federal Wages & FIT

Federal income tax withheld (FIT)

Total federal income tax deducted from your paychecks throughout the year based on your Form W-4 withholding elections. Treated as a direct dollar-for-dollar tax payment.

Form 1040: Form 1040 Line 25a

Statute: IRC § 3402

Audit Rule: Entered on Form 1040 Line 25a. If Box 2 exceeds your final calculated tax liability, you receive a federal refund. If lower, you owe a balance.

Box 3FICA & Tips

Social Security wages

Total wages subject to the 6.2% Social Security payroll tax. Capped by federal statute at $184,500 for tax year 2026 ($176,100 for 2025). Unlike Box 1, traditional 401(k) contributions ARE included.

Form 1040: Informational / Schedule 3 Line 11

Statute: IRC § 3121(a)(1)

Audit Rule: If you had multiple employers and your total Box 3 across all W-2s exceeds $184,500, claim the excess Social Security tax credit on Form 1040 Schedule 3 Line 11.

Box 4FICA & Tips

Social Security tax withheld

The exact amount of Social Security tax deducted from your pay (exactly 6.2% of Box 3). For 2026, the statutory maximum for a single employer is $11,439.00 ($184,500 × 6.2%).

Form 1040: Form 1040 Schedule 3 (If Excess)

Statute: IRC § 3101(a)

Audit Rule: A single employer cannot withhold more than $11,439.00 in 2026. Any overwithholding from one employer must be refunded directly by that employer, not via Form 1040.

Box 5FICA & Tips

Medicare wages and tips

Total earnings subject to the 1.45% Medicare payroll tax. There is NO wage cap on Medicare wages. It includes salary, bonuses, tips, and 401(k) contributions, minus only Section 125 health deductions.

Form 1040: Form 8959 Input

Statute: IRC § 3121(a)

Audit Rule: Usually identical to Box 3 unless your gross wages exceed the $184,500 Social Security wage ceiling.

Box 6FICA & Tips

Medicare tax withheld

Total Medicare tax deducted (1.45% of Box 5), plus the 0.9% Additional Medicare Tax on wages paid in excess of $200,000 in a calendar year pursuant to IRC § 3101(b)(2).

Form 1040: Form 1040 Line 25c & Form 8959

Statute: IRC § 3101(b) & § 3101(b)(2)

Audit Rule: Employers are statutorily required to withhold the 0.9% surtax once wages pass $200,000, regardless of employee marital status. Reconciled on Form 8959.

Box 7FICA & Tips

Social Security tips

The total cash and charge tips you reported to your employer during the tax year. Combined with Box 3, total wages and tips cannot exceed the $184,500 Social Security cap.

Form 1040: Form 4137 / Form 1040

Statute: IRC § 3121(q)

Audit Rule: Reported to SSA for retirement benefit credits. Must equal or exceed $20 per month to be reportable.

Box 8FICA & Tips

Allocated tips

Tips allocated to you by a large food or beverage employer because total reported tips fell short of 8% of the establishment’s gross food and beverage receipts.

Form 1040: Form 4137 & Form 1040 Line 1c

Statute: IRC § 6053(c)

Audit Rule: NOT included in Boxes 1, 3, 5, or 7. You must calculate Social Security and Medicare tax on this amount using IRS Form 4137 and report it on Form 1040 Line 1c.

Box 9Identification

Verification Code

A 16-digit alphanumeric code previously piloted by the IRS to authenticate Form W-2 data and prevent identity theft tax fraud.

Form 1040: Reserved / Empty

Statute: IRS W-2 Verification Pilot

Audit Rule: Currently discontinued and reserved for future IRS use. This box should be left blank on current 2026 Forms W-2.

Box 10Benefits & Retirement

Dependent care benefits

Total dependent care assistance benefits paid or incurred by your employer, including amounts deducted pre-tax into a Dependent Care Flexible Spending Account (DCFSA).

Form 1040: Form 2441 Part III

Statute: IRC § 129

Audit Rule: Statutory exclusion is capped at $5,000 ($2,500 for married filing separately). Any benefit exceeding allowable expenses is added back as taxable wages on Form 1040 Line 1e.

Box 11Benefits & Retirement

Nonqualified plans

Distributions to you from a nonqualified deferred compensation plan or non-exempt section 457 plan. Reported so the SSA can determine if earnings affect retirement benefits.

Form 1040: Form 1040 Informational

Statute: IRC § 409A & § 3121(v)(2)

Audit Rule: This amount is already included in Box 1 federal taxable wages. Do NOT add it to Form 1040 twice.

Box 12Benefits & Retirement

Deferred compensation & fringe benefit codes

A multi-section box using letter codes (A through II) to report elective retirement deferrals, HSA funding, health insurance values, and non-taxable fringe benefits.

Form 1040: Form 1040 / Schedules / Form 8889

Statute: IRC § 401(k), § 223, § 6051

Audit Rule: Critical for verifying retirement plan eligibility, IRA deduction limitations, and health savings account reconciliation on Form 8889.

Box 13Statutory Checkboxes

Statutory checkboxes (3 sub-boxes)

Three distinct checkboxes: (1) Statutory Employee (reports on Schedule C with zero SE tax); (2) Retirement Plan (active participant status triggers Traditional IRA deduction phaseouts); (3) Third-Party Sick Pay.

Form 1040: IRA Phaseout / Schedule C / 1040

Statute: IRC § 219(g) & § 3121(d)(3)

Audit Rule: If "Retirement plan" is checked, your ability to deduct Traditional IRA contributions is subject to strict MAGI phaseouts under IRC § 219(g).

Box 14State & Local

Other (Employer Discretionary)

Catch-all box for items that do not have a dedicated IRS box. Common items: State Disability Insurance (SDI/SUI), union dues, educational assistance, auto allowances, or IRC § 414(h) state pensions.

Form 1040: Schedule A / State Tax Returns

Statute: Employer Payroll Catch-All

Audit Rule: Mandatory state SDI/VPDI entries (e.g., CA CASDI, NY NYSDI, NJ FLI) can often be deducted on Schedule A Itemized Deductions as state taxes under IRC § 164.

Boxes 15–17State & Local

State wage & tax reporting

Box 15: State two-letter code & employer state tax ID. Box 16: State taxable wages (which may differ from Box 1 due to state non-conformity). Box 17: State income tax withheld (SIT).

Form 1040: State Income Tax Return (e.g., Form 540, IT-201)

Statute: State Revenue Code Mandates

Audit Rule: Box 17 withholding is credited against your state tax liability and can be included in the federal SALT deduction on Schedule A (subject to the statutory cap).

Boxes 18–20State & Local

Local wage & tax reporting

Box 18: Local taxable wages. Box 19: Local/city income tax withheld. Box 20: Locality name or municipal tax jurisdiction code.

Form 1040: Local/Municipal Return (NYC, Philly, Ohio RITA)

Statute: Municipal Tax Ordinances

Audit Rule: Required for residents or workers in jurisdictions with local income taxes (such as New York City, Yonkers, Philadelphia, Detroit, or Ohio municipalities).

3. The Math: Why Box 1 ≠ Box 3 ≠ Box 5 Explained

PAA Quick Answer: Box 1 is lower than Box 3 and Box 5 because traditional pre-tax retirement deferrals (401k/403b) are exempt from Federal Income Tax (FIT), but under IRC § 3121(v)(1)(A), they remain 100% subject to FICA payroll taxes (Social Security and Medicare). Section 125 health insurance and HSA payroll deductions, however, reduce all three boxes.

One of the most frequent taxpayer inquiries is why the amount in Box 1 (Wages, tips, other compensation) does not match gross year-end paystubs, or why Box 1 is significantly smaller than Box 3 (Social Security wages) and Box 5 (Medicare wages).

Statutory Wage Reconciliation Formulas:

BOX 1 • FEDERAL TAXABLE WAGES

Gross Pay − 401(k) − Sec. 125 − HSA

Governed by IRC § 3401(a). Elective pre-tax retirement contributions reduce federal taxable income.

BOX 3 • SOCIAL SECURITY WAGES

Min(Gross − Sec. 125 − HSA, $184,500)

Governed by IRC § 3121(a). 401(k) is NOT deducted. Capped at $184,500 for tax year 2026.

BOX 5 • MEDICARE WAGES & TIPS

Gross Pay − Sec. 125 − HSA (Uncapped)

Governed by IRC § 3121(a). Subject to 1.45% base Medicare tax with no wage base ceiling.

BOX 12 CODE AA • ROTH 401(K) EXCEPTION

Included in Box 1, Box 3, AND Box 5

Designated Roth contributions are after-tax; they provide zero current-year wage deductions.

4. Line-by-Line Guide: Boxes 1 through 20 Explained

The table below outlines every statutory field on IRS Form W-2, highlighting tax liability impact, 2026 dollar thresholds, and official Form 1040 line destinations:

Box #	IRS Field Title	Statutory Tax Treatment & 2026 Rules	Form 1040 Line
Box 1	Wages, tips, other compensation	Federal taxable wages (Gross minus pre-tax 401k/HSA/Section 125).	Line 1a
Box 2	Federal income tax withheld (FIT)	Total federal income tax prepaid through paycheck withholdings.	Line 25a
Box 3	Social Security wages	Wages subject to 6.2% SS tax. Capped at $184,500 for 2026.	Informational / SSA
Box 4	Social Security tax withheld	Exactly 6.2% of Box 3. Maximum statutory single-employer cap is $11,439.00.	Sched 3 Line 11 (If Excess)
Box 5	Medicare wages and tips	Earnings subject to 1.45% Medicare tax. Completely uncapped by law.	Form 8959 Input
Box 6	Medicare tax withheld	1.45% base tax plus 0.9% Additional Medicare Tax on wages > $200,000.	Form 8959 / Line 25c
Box 7 & 8	Social Security & Allocated Tips	Reported cash tips (Box 7) and employer-allocated restaurant tips (Box 8).	Form 4137 / Line 1c
Box 10	Dependent care benefits	Employer childcare assistance / DCFSA. Excludable up to $5,000.	Form 2441 Part III
Box 12	Deferred compensation codes	Codes A through II reporting 401(k), HSA, group-term life, Medicaid waivers, and health costs.	Varies by Code Letter
Box 13	Statutory Checkboxes	Statutory Employee, Retirement Plan (affects IRA deduction), Sick Pay.	IRA Phaseout Worksheets
Box 14	Other (Catch-all)	Discretionary entries: CASDI/SDI, union dues, IRC § 414(h) state pensions.	Schedule A (If Deductible)
Boxes 15–20	State & Local Tax Withholding	State Employer ID, state taxable wages, SIT withheld, and local/city taxes.	State & City Tax Returns

5. Box 12 Benefit Codes Master Directory (Codes A to II)

Form W-2 Box 12 consists of 4 entry sections (12a, 12b, 12c, and 12d). Each entry contains a letter code followed by a dollar amount. Understanding whether a code increases your tax bill, reduces your income, or is purely informational is critical for accurate filing. For tax year 2026, the elective deferral limit under IRC § 402(g) (Codes D, E, and G) is $24,500 (up from $23,500 in 2025), plus an $8,000 catch-up contribution for employees aged 50 and older ($11,250 super catch-up for ages 60–63 under SECURE 2.0):

RETIREMENT CONTRIBUTIONS (PRE-TAX)

Code DElective deferrals to traditional 401(k) ($24,500 limit in 2026; $23,500 in 2025).

Code EElective deferrals to Section 403(b) plan.

Code GElective deferrals to Section 457(b) government plans.

Code SSIMPLE retirement plan salary reductions.

HEALTHCARE & SAVINGS ACCOUNTS

Code WEmployer & employee HSA contributions (Form 8889).

Code DDCost of employer health coverage (100% NON-TAXABLE).

Code IIMedicaid waiver difficulty of care payments (Notice 2014-7).

Code FFSmall business health reimbursements (QSEHRA).

ROTH & AFTER-TAX RETIREMENT

Code AADesignated Roth contributions under a 401(k).

Code BBDesignated Roth contributions under a 403(b).

Code EEDesignated Roth contributions under a 457(b).

Note: Roth deferrals are funded after-tax and already included in Box 1!

TAXABLE FRINGES & EQUITY

Code CTaxable group-term life over $50k death benefit.

Code VIncome from exercise of nonstatutory stock options (NSOs).

Code ZTaxable income from Section 409A deferred comp (+20% tax).

Code K20% excise tax on excess golden parachute packages.

6. Box 13 Statutory Checkboxes & Box 14 "Other" Items

Boxes 13 and 14 carry unique statutory consequences that frequently alter taxpayer eligibility for deductions or trigger state adjustments. Understanding these designations prevents costly filing rejections:

BOX 13 • THREE STATUTORY CHECKBOXES

IRC § 3121(d) & § 219(g)

1. Statutory EmployeeSchedule C Safe Harbor

Applies to traveling salespersons, life insurance agents, and commission drivers. You report wages on Schedule C and deduct business expenses with 0% self-employment tax because FICA was already withheld.

2. Retirement PlanIRA Phaseout Trigger

Indicates you were an active participant in an employer 401(k), 403(b), or pension. Triggers strict MAGI phaseouts under IRC § 219(g) that may reduce or eliminate your Traditional IRA deduction.

3. Third-Party Sick PayInsurance Payments

Checked if an external insurance company or third-party disability trust disbursed sickness or disability benefits under your employer’s group plan.

BOX 14 • DISCRETIONARY “OTHER” CODES

State & Local Discretion

CASDI / SDI

State Disability Insurance (SDI / VPDI)

Mandatory disability taxes in CA, NY, NJ, and RI. May be deductible as state taxes on Schedule A Line 5a.

FLI / PFL

Paid Family Leave Contributions

State-mandated employee contributions supporting statutory family and medical leave programs.

IRC § 414(h)

Government Pension Reductions

Mandatory pre-tax retirement plan contributions for public school teachers, police, and civil servants.

UNION DUES

Labor Organization Deductions

Dues withheld directly from wages and remitted to labor unions or collective bargaining units.

7. Employer Filing Deadlines & Non-Compliance Penalties

Statutory Filing Deadline: Employers must furnish Copy B/C to employees and submit Copy A to the Social Security Administration (SSA) alongside Form W-3 transmittal on or before January 31. If January 31 falls on a weekend, the deadline moves to the next business day (Monday, February 1, 2027 for tax year 2026).

Pursuant to the Taxpayer First Act, employers filing 10 or more information returns in aggregate (including Forms W-2, 1099, 1095, etc.) are legally mandated to submit their W-2 returns electronically through the SSA’s Business Services Online (BSO) portal.

Violation Category	Filing Window	Penalty Per Form (IRC § 6721 / 6722)
Tier 1: Corrected Quickly	Within 30 days of due date (by March 2)	$60 per return (Max $683,000 / $239,000 small business)
Tier 2: Corrected by August 1	Between March 3 and August 1	$130 per return (Max $2,049,000 / $683,000 small business)
Tier 3: After August 1 / Not Filed	Filed after August 1 or completely omitted	$340 per return (Max $4,098,500 / $1,366,000 small business)
Intentional Disregard	Willful non-compliance	$680 per return for 2026 filings ($690 for 2027) or 10% of total wages (No limit)

8. Missing, Lost, or Incorrect Form W-2: 3-Step Action Plan

If your employer has gone out of business, refused to furnish your wage statement, or mailed it to an outdated address, execute the official IRS 3-phase escalation protocol:

STEP 01Jan 31 – Feb 14

HR & Payroll Outreach

Verify your residential address on file. Request access to your employer’s electronic payroll portal (ADP, Paychex, Gusto, Workday) to download a secure PDF Copy B/C directly.

STEP 02Post-Feb 15

IRS Direct Escalation

Call the IRS toll-free at 1-800-829-1040. Provide your name, SSN, employer name, address, and estimated wages. The IRS will issue Form 4598 directly to the employer.

STEP 03April Filing Deadline

File Form 4852 Substitute

If your W-2 is not received by the April filing deadline, execute IRS Form 4852. Attach your final cumulative year-end paystub showing year-to-date gross pay and tax withholdings.

9. Form W-2 vs Form 1099-NEC vs Form W-4

Navigating IRS compliance requires understanding the structural differences between onboarding documents (W-4 / W-9) and annual wage statements (W-2 / 1099-NEC):

Compliance Dimension	Form W-2	Form 1099-NEC	Form W-4
Worker Classification	Common-law employee (W-2)	Independent contractor / 1099 vendor	W-2 Employee (Onboarding setup)
Payroll Taxes Withheld	YES (FIT, SS 6.2%, Med 1.45%)	NO (Subject to 15.3% SECA)	Directs employer withholding rates
Employer Tax Match	Employer pays 7.65% FICA match	Zero employer match	N/A (Informational only)
Statutory Deadline	January 31 annually	January 31 annually	Prior to first payroll run
Related Tax Form	Form 1040 Line 1a	Schedule C / Schedule SE	Form 941 Employer Quarterly

Payroll Tool

Free Paystub Generator (2026)

Calculate federal, state, and FICA deductions and print verified year-end paystubs.

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Classification

W-9 vs 1099 Guide

Understand contractor onboarding rules, TIN matching, and 1099-NEC filing obligations.

Read W-9 vs 1099 Guide

Withholding Setup

Form W-4 Step-by-Step Guide

Master Steps 1 through 5, claim dependent credits, and optimize paycheck tax withholding.

Read Form W-4 Guide

Frequently Asked Questions

What is IRS Form W-2 used for?

Form W-2 (Wage and Tax Statement) is the official information return required under Internal Revenue Code § 6051. Employers file it with the Social Security Administration (SSA) and furnish copies to employees annually by January 31. It reports gross annual compensation, pre-tax deductions, federal and state income tax withholdings, and FICA payroll taxes.

Why is Box 1 on Form W-2 lower than Box 3 and Box 5?

Box 1 shows federal taxable income after subtracting pre-tax retirement contributions (e.g., traditional 401(k) or 403(b)), Section 125 health insurance, and pre-tax HSA contributions. Under IRC § 3121(v)(1)(A), elective 401(k) salary deferrals remain 100% subject to Social Security and Medicare taxes. Consequently, Box 3 and Box 5 reflect higher earnings because 401(k) contributions are not deducted from them.

What is the Social Security wage base limit for 2026?

For tax year 2026, the Social Security wage base limit is $184,500 (up from $176,100 in 2025). Any wages earned above $184,500 are exempt from the 6.2% Social Security tax. The maximum Social Security tax that can be withheld by a single employer in 2026 is $11,439.00 ($184,500 × 6.2%).

What should I do if I had two employers and paid excess Social Security tax?

If you worked for two or more employers in 2026 and your combined Box 3 Social Security wages exceeded $184,500, your employers will have collectively withheld more than the $11,439.00 maximum. You can claim a dollar-for-dollar refundable tax credit for this excess Social Security tax directly on Form 1040 Schedule 3 Line 11.

What is the Additional Medicare Tax in Box 6?

Under IRC § 3101(b)(2), employers are legally mandated to withhold an Additional Medicare Tax of 0.9% on wages paid in excess of $200,000 in a calendar year, regardless of the employee’s filing status. This surtax is pooled with regular 1.45% Medicare tax inside Box 6 and reconciled on IRS Form 8959.

Is Box 12 Code DD taxable on my federal return?

No. Code DD reports the aggregate cost of employer-sponsored health insurance coverage pursuant to the Affordable Care Act. It includes both the employer-paid and employee-paid portions. It is strictly informational and is 100% tax-free; you do not report it as taxable income on Form 1040.

What is the difference between Box 12 Code D and Code AA?

Code D represents pre-tax traditional 401(k) contributions, which are excluded from Box 1 taxable wages. Code AA represents designated Roth 401(k) contributions, which are funded with after-tax dollars and are already included in Box 1 federal taxable wages. Both Code D and Code AA are subject to FICA taxes in Boxes 3 and 5.

What does the "Retirement plan" checkbox in Box 13 mean?

If the "Retirement plan" box is checked, you (or your spouse, if married) were an active participant in an employer-sponsored retirement plan (like a 401k, 403b, or pension) for any part of the year. This active participant status triggers statutory Modified Adjusted Gross Income (MAGI) phaseout limits that may restrict your ability to deduct Traditional IRA contributions under IRC § 219(g).

What should be reported in Box 14 "Other"?

Box 14 is a discretionary catch-all field used by employers to report state or company-specific items not covered by other boxes. Common examples include state disability insurance (e.g., CASDI in California, NYSDI in New York), mandatory paid family leave contributions, union dues, uniform allowances, or mandatory pre-tax government retirement contributions under IRC § 414(h).

What is the deadline for employers to furnish Form W-2?

Federal statute mandates that employers furnish Copy B and Copy C to employees on or before January 31 following the close of the calendar year. Simultaneously, Copy A must be transmitted to the Social Security Administration (SSA). For tax year 2026, because January 31, 2027 falls on a Sunday, the statutory deadline shifts to Monday, February 1, 2027.

What if my employer fails to send my Form W-2 by January 31?

First, contact your employer or payroll department to confirm your mailing address or electronic portal access. If you still have not received your W-2 by February 15, call the IRS toll-free at 1-800-829-1040. The IRS will issue Form 4598 (Notice of Missing W-2) to the employer. If it does not arrive before the April filing deadline, file your return using IRS Form 4852 (Substitute for Form W-2) attached to your final year-end paystub.

What are the penalties for employers who issue late or incorrect W-2 forms?

Under IRC § 6721 and § 6722 (adjusted for inflation pursuant to Rev. Proc. 2024-40 and Rev. Proc. 2025-32), civil penalties range from $60 per form (if corrected within 30 days) to $340 per form (if filed after August 1 or not filed at all). For intentional disregard of W-2 filing mandates, penalties increase to $680 per form for 2026 filings ($690 for 2027 filings) or 10% of aggregate compensation reported, with no maximum annual cap.

What is the difference between Form W-2 Copy A, Copy B, Copy C, and Copy 2?

Copy A is transmitted by the employer to the Social Security Administration. Copy B is filed by the employee with their federal Form 1040 (if paper filing). Copy C is kept permanently in the employee’s personal tax records. Copy 1 is sent to state/local tax authorities, and Copy 2 is filed with the employee’s state or municipal tax return.

Can I generate paystubs to verify or recreate my W-2 totals?

Yes. Cumulative year-end paystubs provide the exact gross earnings, pre-tax deductions, and tax withholdings necessary to audit or recreate Form W-2 values. If an employer has closed or failed to furnish a statement, your final paystub serves as the primary substantiating document for filing IRS Form 4852.

Official IRS Sources & Citations

IRS.gov: Form W-9 (Rev. March 2024) – Request for Taxpayer Identification Number and Certification (OMB No. 1545-0029).Official Source ↗
Internal Revenue Code: 26 U.S. Code § 3406 — Mandatory 24% Backup Withholding on Reportable Payments (26 U.S.C. § 3406).Official Source ↗
Treasury Regulations: 26 CFR § 31.3406(h)-3 — Certificates of Taxpayer Identification Number and Signature Verification (Treas. Reg. § 31.3406(h)-3).Official Source ↗
IRS Publication 1281: Backup Withholding for Missing and Incorrect Name/TIN(s) (Payers Guide) (IRS Pub. 1281 (Rev. 12-2023)).Official Source ↗