After Tax Deduction — Payroll Definition

What is After-Tax (Post-Tax) Deduction?

A post-tax deduction is taken after the relevant tax calculation. Examples can include designated Roth plan contributions, certain insurance premiums, union dues, garnishments, or voluntary deductions, but the actual treatment depends on the plan and jurisdiction. A deduction’s label does not determine its legal or tax treatment.

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.