Social Security — Payroll Definition

What is Social Security Tax?

Social Security tax, also called OASDI, is generally withheld from employee wages at 6.2% up to the annual contribution and benefit base. The Social Security Administration lists the 2026 base as $184,500. Once an employee reaches that base with one employer, that employer generally stops employee OASDI withholding for the rest of the year; special reconciliation rules can matter when there is more than one employer.

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.

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