Illinois Payroll Agencies: Official Links for Employers
Last reviewed: July 2026
Every employer in Illinois ends up dealing with the same short list of government offices: one for tax registration, one for unemployment insurance, one for reporting new hires, and one for wage rules. This page keeps the official links in one place so you never have to dig for them through search results and lookalike sites. Bookmark it; we keep it current.
| What you need | Official Illinois resource |
|---|---|
| Tax / revenue department (withholding & registration) | Illinois Department of Revenue |
| Unemployment insurance (SUI) registration & reporting | Illinois Department of Employment Security (IDES) |
| New-hire reporting | Illinois New Hire Directory (IDES) |
| Labor department (wage & hour rules) | Illinois Department of Labor |
A note on lookalike sites: many well-ranked pages imitate state portals and charge fees for registrations the state handles free. The links above go to government sites only. If a site asks for payment just to give you an account number, close the tab.
Illinois Payroll Quick Facts (2026)
| Minimum wage | $15.00 |
|---|---|
| State income tax withholding | Illinois Form IL-W-4 |
| SUI new-employer rate | 3.350% |
| SUI taxable wage base | $14,250 |
| Payday frequency rule | Wages must be paid at least semi-monthly, no later than 13 days after the end of the pay period (executive/administrative/professional employees and commissions may be paid monthly). |
| New-hire reporting deadline | 20 days |
Verified 2026-07 against official Illinois sources.