IL · Payroll tax 2026
The true cost of hiring in Illinois
What a W-2 employee actually costs an employer in Illinois— and how that compares to a 1099 contractor — with the state's real 2026 unemployment-insurance rates built in.
Illinois employers pay more than salary the moment they sign a W-2 offer. At the federal level, that means 6.2% Social Security (up to $176,100), 1.45% Medicare, and 0.6% FUTA on the first $7,000. Illinois adds a state unemployment insurance obligation: new employers pay 3.65% on the first $13,916 of each worker's wages — a maximum SUI exposure of $508 per employee per year. Staffing and outsourcing businesses (NAICS codes 56 and 99) face a higher rate of 3.75% on that same base. Illinois does levy a state income tax on wages, so payroll withholding and quarterly filing requirements apply from day one. The state's economy spans financial services and professional services concentrated in Chicago, manufacturing and logistics corridors along the I-55 and I-80 corridors, and agriculture-supply-chain operations downstate. Employers in any of these sectors face the same SUI math: budget roughly $508–$522 in state unemployment tax per W-2 hire before accounting for workers' compensation premiums, benefits, or the payroll-processing overhead that never appears in a job-offer letter.
Estimate a Illinois hire
Pre-filled with Illinois's 3.65% new-employer SUI rate. Adjust salary, benefits, and the 1099 rate to fit your hire.
Illinois employer tax facts
| Item | IL |
|---|---|
| New-employer SUI rate | 3.65% |
| SUI taxable wage base | $13,916 |
| Federal FICA (employer) | 7.65% |
| FUTA | 0.6% |
| State income tax on wages | Yes |
| Worker classification test | ABC test |
Extra employer taxes: 3.75% for NAICS 56/99.
Example: a $75,000 hire in Illinois
At a $75,000 base salary with typical benefits, a W-2 employee in Illinois costs an employer $99,587 per year — $24,587 above base pay. An equivalent 1099 contract at $75,000 would cost $24,587 less; the breakeven contract rate is $99,587.
Misclassification risk in Illinois
Test: ABC test
ABC test; Employee Classification Act (construction) $1,500–$2,500/day for willful violations.
Penalties by stateCompare nearby rates
Illinois's 3.65% new-employer SUI rate sits near Pennsylvania (3.82%), California (3.4%), Wisconsin (3.25%), New York (4.1%). See the full 51-state comparison or the 2026 employer payroll tax reference.
Illinois hiring-cost FAQ
- What is the Illinois new-employer SUI rate and wage base?
- New employers in Illinois pay a state unemployment insurance (SUI) rate of 3.65% on the first $13,916 of each employee's wages, capping the state UI cost at roughly $508 per worker per year. Businesses classified under NAICS codes 56 or 99 — staffing and outsourcing — pay a slightly higher rate of 3.75% on that same taxable wage base.
- Does Illinois tax wage income at the state level?
- Yes. Illinois imposes a flat state income tax on wages, which means employers must withhold state income tax from every W-2 employee's paycheck and remit it to the Illinois Department of Revenue on a quarterly or monthly schedule depending on payroll size. There is no Illinois exemption for wage income comparable to the no-income-tax states like Texas or Florida.
- What are the penalties for misclassifying a worker in Illinois?
- Illinois uses the ABC test to determine whether a worker is an employee or an independent contractor. In the construction sector, willful violations of the Employee Classification Act carry penalties of $1,500 to $2,500 per day — meaning a single misclassified construction worker left uncorrected for a month can generate more than $75,000 in statutory fines, separate from any back taxes or benefit liabilities owed.