The Illinois Wage Deduction Notice is a document used in the state of Illinois to inform employees of deductions that will be taken from their wages. This document is required by the Illinois Department of Labor (IDOL) to ensure that employers are in compliance with state laws regarding wage deductions. It outlines the amount of deductions, when they will be taken, and the reason for the deductions. The Illinois Wage Deduction Notice must be provided to the employee by the employer prior to any deductions being taken. There are two types of Illinois Wage Deduction Notices: Mandatory Deductions and Voluntary Deductions. Mandatory Deductions are required by law, such as taxes, child support, and garnishments. Voluntary Deductions are deductions that are agreed upon by the employee and the employer, such as health insurance premiums, 401(k) contributions, and union dues.