After-Tax (Post-Tax) Deduction — Payroll Definition

After-Tax (Post-Tax) Deduction paystub meaning: A deduction taken AFTER taxes — like Roth 401(k) contributions, union dues, or garnishments.

A deduction taken AFTER taxes — like Roth 401(k) contributions, union dues, or garnishments.

After-tax deductions are subtracted from your pay AFTER income taxes have been calculated. They do NOT reduce your current taxable income. Examples include Roth 401(k)/Roth IRA contributions (taxed now, tax-free in retirement), union dues, voluntary life insurance above $50,000, wage garnishments, and charitable donations via payroll. While they don't provide an immediate tax benefit, Roth contributions grow tax-free — a powerful long-term advantage.

A deduction can be pre-tax, post-tax, voluntary, or required. Its label alone does not establish how it affects taxable wages, so check the plan document, employee election, payroll policy, and year-to-date amount.

When this term appears on a statement, read its label, current amount, year-to-date amount, pay-period context, and any adjacent rate or hours together. Resolve a mismatch with the original issuer or the cited authority rather than changing a record to force a preferred result.