Employers are required to give each employee a W‑2 form because it is the official way wages and taxes are reported to both the government and the worker for income tax purposes. Without it, neither the IRS nor the employee would have a reliable, standardized record of how much was earned and how much tax was already withheld.

What a W‑2 Does

The W‑2 is a wage and tax statement that shows your total pay and all the taxes taken out during the year. It covers federal income tax, state income tax (if applicable), and Social Security and Medicare contributions.

Because it is standardized and required by law, the W‑2 creates a single, consistent snapshot of your annual earnings and withholdings. That consistency is what lets tax software, accountants, and the IRS all “speak the same language” when processing returns.

Why Employers Must Give It to Employees

  1. Accurate tax filing for workers
    Employees need the W‑2 to fill out their income tax returns correctly and on time. The form tells them exactly how much income to report and how much tax has already been paid, which determines whether they get a refund or owe more.
  1. Government compliance and enforcement
    Employers also send copies of W‑2s to the Social Security Administration and, through that system, to the IRS so the government can verify reported income and withholding. Requiring employers to provide the same information to employees makes it harder to under‑report wages or under‑withhold taxes.
  1. Protection of employee benefits
    The W‑2 shows wages that count toward Social Security and Medicare, which affects future benefits. Accurate reporting protects workers’ long‑term claims to those benefits.
  1. Proof of income for life outside taxes
    Lenders, landlords, and some government programs often ask for W‑2s as proof of employment and income. By requiring employers to issue them, the law ensures employees have a trusted document they can use when applying for loans, apartments, or assistance.

Legal Requirement and Deadlines

U.S. law requires employers to prepare and file Form W‑2 to report wages and withheld taxes for each employee. They must give the employee a copy by around January 31 so people have enough time to file their tax returns for the prior year.

If employers fail to provide accurate W‑2s on time, they can face penalties because it disrupts tax administration and may harm employees who cannot file correctly. The requirement is essentially about making the tax system workable and fair for both the government and workers.

In short: employers are required to give employees W‑2s so everyone—worker, IRS, and Social Security—has a shared, reliable record of earnings and taxes, which is critical for correct tax filing, benefits tracking, and income verification.