Depositing and Reporting Withheld Taxes: Illinois
Federal law and guidance on this subject should be reviewed together with this section.
Author: Vicki M. Lambert, The Payroll Advisor
- Illinois employers must file certain required forms to report, pay and/or correct amounts withheld from employees' pay. See Forms.
- Illinois employers are assigned either a semiweekly or monthly payment schedule based on their look-back period; this is the one-year period ending on June 30 of the immediately preceding calendar year. All employers must file quarterly withholding tax returns. Penalties are imposed for failure to file returns. See Deposit Thresholds and Schedules.
- Certain employers must make payments of withheld taxes electronically using the semiweekly payment and quarterly return schedule in the following quarter, the remainder of the year and the subsequent year. Employers not required to file electronically are encouraged to do so. See Electronic Deposit Requirements.
- All employers must electronically transmit Forms W-2, Wage and Tax Statement, and W-2c, Corrected Wage and Tax Statement. Form W-2 Filing Requirements.