The IRS form US employers must issue to each employee by January 31 reporting their annual wages and federal, state, and local taxes withheld.
Form W-2 (Wage and Tax Statement) is the annual IRS form every US employer must complete for each employee who received $600 or more in wages during a calendar year, or from whom federal, Social Security, or Medicare tax was withheld at any amount. It is one of the most-issued IRS forms in the country — the SSA processes over 250 million W-2s annually — and one of the most error-prone for HR and payroll teams.
The W-2 reports a complete year-end summary of an employee's earnings and withholdings:
• Box 1: Total taxable wages, tips, and other compensation (federal income tax base — typically excludes pre-tax 401(k), Section 125 cafeteria-plan deductions, HSA contributions) • Box 2: Federal income tax withheld during the year • Box 3: Social Security wages (subject to the OASDI wage base cap) • Box 4: Social Security tax withheld (6.2% of box 3) • Box 5: Medicare wages and tips (no cap) • Box 6: Medicare tax withheld (1.45% on box 5, plus 0.9% Additional Medicare on wages over $200,000) • Box 7-8: Social Security tips and allocated tips (mostly relevant for restaurant industry) • Box 10: Dependent care benefits • Box 11: Non-qualified plan distributions • Box 12: Lettered codes for various items including 401(k) deferrals (D), Roth 401(k) (AA), HSA (W), employer-provided health insurance (DD), restricted stock (V), and many others • Box 13: Checkboxes for statutory employee, retirement plan participant, and third-party sick pay • Box 14: Free-form 'other' field employers use for state-specific items, union dues, parking fringe, etc. • Boxes 15-20: State and local wage and tax info — repeats per state if employee worked in multiple
The W-2 has six copies: A (sent to SSA), B (employee files with federal return), C (employee keeps), D (employer keeps for records), 1 (state tax authority), and 2 (employee files with state return). Each copy has identical data but different distribution paths.
Filing deadlines are unforgiving. Employers must furnish copies B, C, and 2 to the employee by January 31 of the year following the tax year — by mail, electronic delivery (with employee consent under 26 CFR §31.6051-1(j)), or hand delivery. Copy A must be filed with the Social Security Administration also by January 31 (this deadline was moved up from February 28 in 2017 by the PATH Act to combat tax-return fraud). Electronic filing is mandatory for employers filing 10 or more W-2s, down from 250 in 2023, under the Taxpayer First Act's expansion of electronic filing.
Late-filing penalties under IRC §6721/6722 are tiered by lateness: • $60 per form if filed within 30 days of the deadline (cap: $664,500 per year, $232,500 for small businesses) • $130 per form if filed by August 1 (cap: $1,993,500, $664,500 small) • $330 per form if filed after August 1 or not filed (cap: $3,987,000, $1,329,000 small) • $660 per form for intentional disregard (no cap)
A W-2 must be 'corrected' via Form W-2c when errors are found after filing. Common errors triggering a W-2c: wrong Social Security number, wrong wage amount, wrong federal income tax withheld, incorrect employer EIN, missing or incorrect state-level boxes, incorrect retirement plan checkbox affecting an employee's IRA deduction. Each W-2c also requires a corresponding Form W-3c summary.
W-2 vs 1099-NEC misclassification is the single most expensive payroll error. The IRS aggressively reclassifies workers from 1099 to W-2 when the relationship reflects employee-level control. Reclassification penalties include: back FICA at the employer's full 7.65%, the missing employee-side 7.65% (employer eats this too because the worker didn't have it withheld), federal unemployment (FUTA), state unemployment (SUTA), workers' comp premiums, plus penalties under IRC §3509 (a partial relief if the employer wasn't intentionally avoiding tax). Section 530 of the Revenue Act of 1978 provides a 'reasonable basis' safe harbor for employers who consistently treated workers as contractors based on industry practice or prior IRS audits.
The W-2 also feeds the federal Earned Income Tax Credit (EITC), state income tax filings, Social Security earnings record (which determines future retirement benefits), unemployment claims, mortgage and loan applications, and immigration status verification. An incorrect or missing W-2 ripples into all of these, which is why employees notice and complain quickly when something is wrong.
Modern payroll software automates W-2 generation by aggregating year-to-date tax records from each pay period, applying box-12 letter codes correctly (this is where most payroll software differentiates), generating Forms W-2c when corrections are needed, and electronically filing Copy A with the SSA via Business Services Online (BSO) or the AccuWage validation portal. Employees access their W-2s via secure self-service portals — January 31 is the moment HR's phone stops ringing about W-2 distribution if the system worked.
Each January, our payroll system generates W-2s for all 240 employees, applies the correct box-12 codes for 401(k) and HSA contributions, and electronically files Copy A with the SSA via BSO before the January 31 deadline.
Peoplifi unifies HR, payroll, time tracking, and performance into one modern platform — so concepts like W-2 stay handled, not stuck in spreadsheets.
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