Employee Expense Reimbursement Laws in Illinois

Federal law under the Fair Labor Standards Act (FLSA), 29 U.S.C. § 201 et seq., does not explicitly mandate expense reimbursement. However, the FLSA prohibits deductions from wages that reduce an employee's earnings below the federal minimum wage of $7.25 per hour. The U.S. Department of Labor's Wage and Hour Division interprets the FLSA to mean that if an employer requires an employee to incur work-related expenses, any reimbursement shortfall or deduction cannot reduce gross pay below the applicable minimum wage.

Federally, the test is whether the deduction or non-reimbursement brings the employee below minimum wage for the work week. If an expense is truly optional or personal, federal law does not require reimbursement. However, if an expense is necessary to perform the job—such as required uniforms, tools, or licensing fees—the employer may be obligated to cover those costs or reimburse them. Enforcement occurs through the U.S. Department of Labor Wage and Hour Division or private lawsuits under 29 U.S.C. § 216, which provides for unpaid wages plus an equal amount in liquidated damages, plus attorney fees and costs.

Illinois law provides significantly stronger protections than federal law. The Illinois Wage Payment Act (820 ILCS 115/3) requires employers to reimburse employees for all necessary work-related expenses incurred during employment. This is not conditioned on whether the reimbursement would reduce pay below minimum wage—the statute imposes an affirmative reimbursement obligation.

Under 820 ILCS 115/3, "[a]ll wages, salaries, commissions or other compensation owed to an employee for labor or services performed shall be paid in full on the regular pay date designated by the employer, and no deductions shall be made without the employee's written consent." Illinois courts and the Department of Labor have interpreted "wages" to include necessary work expenses. Crucially, Illinois law does not exempt expense reimbursement from this requirement by reference to minimum wage thresholds, as federal law does. Instead, Illinois requires reimbursement as a matter of wage law, regardless of the impact on minimum wage calculations.

The Illinois Minimum Wage Law (820 ILCS 105/4) reinforces this by stating that employers cannot reduce compensation below the state minimum wage, and unreimbursed necessary work expenses are treated as unlawful deductions. Illinois's minimum wage as of 2024 is $14.00 per hour, substantially higher than the federal minimum of $7.25.

Illinois law applies to all employers with employees in Illinois, including small employers with no federal FLSA coverage threshold. State law does not require a minimum number of employees to trigger coverage. Remedies under Illinois law include unpaid wages plus liquidated damages equal to the unpaid amount, plus attorney fees, costs, and prejudgment interest at the rate set by statute (currently 2% per annum above the rate set by the Federal Reserve). The Illinois Department of Labor enforces wage claims, and employees can also file private lawsuits in civil court.

Several important exceptions and limitations apply under Illinois law. First, the reimbursement obligation applies only to necessary work-related expenses—those required by the employer or reasonably necessary to perform the employee's job duties. Personal or optional expenses, such as commuting costs, meals during work hours not required by the employer, or equipment the employee chooses to purchase for convenience, may not qualify as necessary expenses subject to reimbursement.

Second, if an employee voluntarily incurs an expense without being directed or required by the employer to do so, and the employer has made clear that reimbursement is not available, the expense may not be recoverable. However, if the employer implicitly required the expense or knew the employee was incurring it for work purposes and took no action, a reimbursement obligation likely exists.

Third, if an employee signs an express written agreement authorizing a deduction for a specific expense, the deduction may be enforceable if the deduction does not reduce wages below minimum wage and the employee's written consent is clear and unambiguous. However, Illinois courts construe such agreements narrowly against employers.

Fourth, some expenses may be disputed as truly necessary. For example, uniforms required by the employer are reimbursable, but discretionary professional attire may not be. Tools required for the job must be provided or reimbursed, but tools the employee purchases for personal use outside work are not reimbursable.

Fifth, if an employee is reimbursed in the pay period in which the expense is incurred or within a reasonable time thereafter (typically within 30 days), the expense is not considered unreimbursed. However, indefinite delays or refusals to reimburse trigger the wage claim.

Lastly, independent contractors and statutory non-employees are not covered by the Wage Payment Act. However, misclassification as an independent contractor when the individual is truly an employee does not defeat the reimbursement obligation.

**Step 1: Document the Expense.** Keep detailed records of all work-related expenses you incur. For each expense, document: (1) the date the expense was incurred, (2) the amount paid, (3) the business purpose and how it relates to your job, (4) who authorized or required you to incur the expense (via email, text, verbal instruction, or employer policy), and (5) proof of payment (receipt, credit card statement, invoice). Take photos of receipts before they fade. Create a spreadsheet or summary listing each unreimbursed expense, the date requested for reimbursement, and the date the employer refused or failed to reimburse. Include any communications from your employer regarding the expense—emails, texts, Slack messages, or written policies that indicate the expense was job-required.

**Step 2: Request Reimbursement Formally.** Before filing a claim, make a written request for reimbursement. Send an email to your supervisor or human resources department that clearly states: (1) the specific expense(s), (2) the date(s) incurred, (3) the amount owed, (4) the business purpose, (5) your request for reimbursement within 10 business days, and (6) that this is a necessary work expense under Illinois Wage Payment Act. Keep a copy of this email. If your employer refuses, demands you pay the expense, or fails to respond within 30 days, you have grounds to file a wage claim. Do not deduct the expense from your own taxes or claim it as a business expense if you are an employee—that is the employer's obligation.

**Step 3: File a Wage Claim with the Illinois Department of Labor.** You must file a wage claim within two years of the date the expense was incurred (or within two years of the date you last should have been reimbursed). To file, visit the Illinois Department of Labor website at www2.illinois.gov/idol/ or call the Wage Claim Unit at (217) 782-2193. You can file a paper claim by mailing it to: Illinois Department of Labor, Wage Claim Unit, 160 North LaSalle Street, Suite S-300, Chicago, IL 60601. You can also file online through the Department's wage claim portal. Provide: (1) your name, address, phone number, and email, (2) your employer's name, address, and phone number, (3) the dates you worked for the employer, (4) a detailed description of each unreimbursed expense with dates and amounts, (5) the date you requested reimbursement, (6) proof that the expense was work-related (emails, receipts, policy documents), and (7) the total amount owed. Filing is free and does not require an attorney, though you may want legal representation.

**Step 4: Participate in the Investigation.** After filing, the Illinois Department of Labor will investigate. An investigator will contact you and your employer to gather evidence. You will be asked to provide your documentation, receipts, and testimony about why the expenses were necessary. Respond promptly to all Department communications. The employer will be given an opportunity to respond and provide records showing whether reimbursement was made. The investigation typically takes 2 to 6 months, though complex cases may take longer. During this time, you may be contacted multiple times for clarification. Provide all requested documents promptly.

**Step 5: Await the Determination and Consider Your Options.** The Department of Labor will issue a determination letter. If the Department finds in your favor, it will order the employer to pay unpaid reimbursement plus liquidated damages (an amount equal to the unpaid reimbursement), pre-judgment interest, and may assess penalties against the employer. If the employer does not voluntarily pay within 30 days, you can request that the Department enforce the wage claim through collection or you can file a private lawsuit in Illinois Circuit Court to enforce the Department's order. If the determination is unfavorable, you may appeal to the Illinois Department of Labor, Bureau of Employee Rights or file a private lawsuit in civil court within the two-year statute of limitations. Consult an employment attorney if the amount owed is substantial (generally $5,000 or more), if your employer retaliates, or if the Department's determination is disputed. Many Illinois employment attorneys work on contingency for wage claims, meaning you pay no upfront fees.