Post-tax deductions are amounts that are taken out of an employees paycheck after all required taxes have been withheld. Unlike pre-tax deductions, post-tax deductions do not reduce taxable wages and the amount of tax owed. Common examples of post-tax deductions include Roth IRA retirement plans, disability insurance, union dues, donations to charity, and wage garnishments. Post-tax deductions can be mandatory or voluntary, and they can significantly impact an employees take-home pay and overall financial well-being. Examples of post-tax deductions include retirement contributions, health insurance premiums, and other benefits.