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Payroll Outsourcing in Illinois: Employer Guide
Payroll outsourcing in Illinois means a provider running payroll under Illinois rules: state withholding (flat 4.95%), new hires reported within 20 days, and a discharged employee's final pay by the next regular payday (as soon as practicable). BEG manages it for $45 per employee per month inside the payroll software you already use, all-inclusive, live in 3 to 5 business days.
What a Illinois payroll actually has to get right
General information for 2026, not legal advice. Deadlines and rates change; confirm with the Illinois agency before acting.
| State income tax on wages | Flat 4.95% |
|---|---|
| Pay-frequency law | Semi-monthly for most workers |
| New hire reporting deadline | 20 days (federal default) |
| Final paycheck, discharge | By the next regular payday (as soon as practicable). [820 ILCS 115/5] |
| Final paycheck, resignation | By the next regular payday (as soon as practicable). |
| Accrued PTO at separation | This state treats accrued, unused PTO as earned wages, so it generally must be paid out at separation. |
| 2026 minimum wage | $15.00 (applies to employers of 4 or more (family members excluded)). Paid Leave for All Workers: leave usable for any reason [DOL state minimum wage table] |
| Overtime rule | Weekly over 40 |
| Paid sick and family leave | Paid Leave for All Workers Act in effect (any reason) |
| Continuation coverage under 20 employees | Illinois Continuation of Coverage (Illinois Insurance Code), up to 12 months. applies to fully-insured group accident and health policies and HMO contracts regardless of employer size (not limited to sub-20 groups); functions as state continuation for groups not covered by, or in addition to, federal COBRA [215 ILCS 5/367e (insurance companies); 215 ILCS 125/4-9.2 (HMOs); spousal continuation at 215 ILCS 5/367.2] |
Registrations and filings a provider handles in Illinois
Illinois taxes wages (flat 4.95%), so a Illinois employer carries a state withholding account and a state deposit schedule on top of the federal one, plus a separate Illinois unemployment insurance account with quarterly wage reports, and new hire reports due within 20 days (federal default).
Where Illinois diverges from the federal baseline
Pay frequency: semi-monthly for most workers. The run calendar is set to that rule at implementation so a schedule change never becomes a wage claim.
Overtime follows weekly over 40, so the federal regular-rate rules govern: bonuses, shift differentials and commissions all fold into the rate before the premium is applied.
On discharge in Illinois the final check is due by the next regular payday (as soon as practicable), and on resignation by the next regular payday (as soon as practicable). Accrued PTO is treated as earned wages, so it is on the final check whatever the handbook says. Full detail on the Illinois final paycheck rules page.
Leave: paid Leave for All Workers Act in effect (any reason). Paid sick leave accrual and balances are tracked per employee in payroll, and the balance shows where Illinois requires it. See the Illinois paid sick leave page for the accrual mechanics.
What BEG managed payroll includes for Illinois employers
$45 per employee per month, all-inclusive, inside the payroll software you already use, with no monthly minimum and no setup fee. Illinois withholding and unemployment registration, quarterly and annual state filings, new hire reporting within 20 days (federal default), final-pay runs on the Illinois deadline, and year-end W-2s are all inside that price. Live in 3 to 5 business days from signing.
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Frequently Asked Questions
Does Illinois have state income tax withholding?
Yes. Illinois taxes wages (flat 4.95%), so every employer with Illinois employees registers a state withholding account, withholds from each check and remits on the state's deposit schedule alongside federal deposits.
When is a final paycheck due in Illinois?
On discharge: by the next regular payday (as soon as practicable). On resignation: by the next regular payday (as soon as practicable). This state treats accrued, unused PTO as earned wages, so it generally must be paid out at separation. Source: 820 ILCS 115/5.
How often must Illinois employers pay employees?
Illinois pay-frequency rule: semi-monthly for most workers. A payroll provider sets the run calendar to that rule at setup, so the schedule is never the thing that creates a wage claim.
How fast must new hires be reported in Illinois?
Illinois requires new hire reporting within 20 days (federal default). That matches the federal default, and the report goes to the Illinois new hire directory, not the IRS.
Does Illinois require paid sick leave or paid family leave?
Paid Leave for All Workers Act in effect (any reason). Because Illinois mandates paid sick leave, payroll has to track accrual and balances per employee and show them where the statute requires.
What is the Illinois minimum wage in 2026?
$15.00 (applies to employers of 4 or more (family members excluded)). Paid Leave for All Workers: leave usable for any reason. Overtime in Illinois: weekly over 40.
What does managed payroll cost for a Illinois business?
$45 per employee per month, all-inclusive, inside the payroll software you already use, with no monthly minimum and no setup fee. Illinois withholding, unemployment filings, new hire reports and year-end W-2s are included, not add-ons.
Related Resources
Anthony leads payroll solutions at Business Executive Group, a national managed payroll firm serving businesses across industries. BEG manages payroll at $45 PEPM, all-inclusive, with deep expertise in compliance, multi-state filing, and industry-specific payroll requirements. Get instant pricing at beghr.com.
Authoritative source: U.S. Department of Labor: Wage and Hour Division
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