W4 — Payroll Definition

What is Form W-4?

An employee gives Form W-4 information to the employer for federal income-tax withholding. The form covers filing status and other entries that can affect withholding. Use the current form and instructions, and consider the IRS withholding estimator before changing entries. A W-4 does not determine final annual tax by itself.

How to apply this payroll definition

Locate the label beside its current-period amount, taxable-wage basis, and year-to-date total. Compare it with prior genuine statements, benefits materials, the employer's payroll documentation, and the primary source linked on this page. The same abbreviation can carry a different employer-specific meaning.

What the label does not prove

A familiar term or plausible amount does not authenticate a pay statement or confirm identity, employment, wages, deductions, tax compliance, or eligibility. Ask the verified payroll contact about an unknown code. Use current agency instructions or a qualified adviser when a rate, filing, benefit, garnishment, or legal decision depends on the answer.

Browse all payroll definitions or use the pay-statement codes guide.