The commission from a recent sale may be money you rely on to pay bills, buy groceries and cover other needs. If your employer introduces a new commission structure before that payment arrives, you might wonder what happens to the sale you already completed and whether the change affects the amount you expected to receive.
Limits on retroactive reductions
Under Illinois law, your commission becomes earned pay once you complete everything required by the plan. If that happened before the new structure took effect, your employer generally must use the earlier rate for that sale.
Your employer can still lower rates, change tiers or introduce a different formula for future work. However, the company must notify you before you perform the work covered by those terms and cannot use them to reduce a commission you already earned.
Terms defining commission entitlement
Illinois law generally looks to your sales compensation agreement to establish when your right to payment arises. Depending on the language used, that point may occur when:
- The customer executes a contract or submits a binding order
- The employer ships the goods or begins providing the service
- The buyer pays the invoice in full
- The scheduled payout date arrives while you remain employed
These conditions matter because closing the deal may represent only one stage in the compensation process. If delivery or payment remains pending, or if the plan requires you to remain employed through the payout date, the commission might not qualify as earned wages.
Records identifying controlling terms
Commission disputes often turn on which version of the pay structure governed a particular transaction. Several documents may help clarify the timeline:
- The plan document, offer letter or employment agreement in effect when you completed the sale
- Emails or memoranda explaining the revision and the date it took effect
- Pay statements showing how the employer calculated similar earnings in the past
- Sales reports, invoices or customer records confirming when the transaction reached each required stage
Viewed together, these materials connect the written arrangement to the history of your sale. They can show whether you completed the qualifying steps under the earlier version and whether the difference resulted from timing, interpretation or a payroll error.
Options for recovering unpaid compensation
A written request to payroll or human resources can resolve the issue, especially when the difference stems from an administrative error or a different interpretation of the sales arrangement. You can identify the transaction, explain your calculation and ask which version the company used.
If the matter remains unresolved, you may file a wage claim through the Illinois Department of Labor’s online system or bring a civil action, but you generally cannot pursue both for the same underpayment. Either route may provide the unpaid amount plus damages equal to 5% for each month it remains outstanding.
It is important to know that each filing period differs. A wage claim filed with the department generally must be submitted within one year after the commission became due, while a lawsuit usually has a 10-year deadline.
