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Wisconsin vs. Illinois Taxes Side by Side Comparison
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Wisconsin Taxes
Corporate Income
Base: Net Income
Rate:7.9% (plus a recycling surcharge equal to 3.0% of tax due before credits.)*
Apportionment:100% sales (eff. 2008)

Personal Income
Rates:4.60% to 6.75% (the recycling surcharge also applies to net business income
of individuals at the rate of 0.2%.)*

Property
Base:Real property and tangible personal property (exemptions for machinery and equipment used in manufacturing; manufacturing, merchant and farm inventories; and computer hardware and software. Other property tax exemptions apply in specific situations.)
Statewide Rate: Estimated at $22.00 per $1,000 of full value.

Sales & Use
State Rate: 5.00%
Eau Claire County Option:0.50%
Combined Rates: 5.5%

Unemployment Compensation
Base: $12,000
Rates: .27%-9.8%
New Employers: 3.6%
New Construction Employers: 6.60%

*Surcharge limited to maximum of $9,800 and a minimum of $25. The surcharge is generally imposed on taxpayers engaged in trade or business with gross receipts of at least $4,000,000 for the taxable year.

Illinois Taxes
Corporate Income
Base: Net Income
Rate:7.3% (personal property replacement tax of 2.5%.)
Apportionment: 100% sales (eff. 2008)
Personal Income
Rates: 3% (S corporations, trusts and partnerships pay an additional personal property replacement tax of 1.5% of net income.)

Property
Base:Real property
Statewide Rate: Outside of Cook County is estimated at $20 to $30 per $1,000 of full value for commercial and non-commercial property.
Cook County: Estimated at $60 to $100 per $1,000 of full value.

Sales & Use
State Rate: 6.25% (exemption for mfg. equipment)
Local Option Rate: 0%-5.75%
Combined Rates: 6.25%-12.00%
Cook/DuPage County Rate (Combined Merchandise): 9.00 / 7.75%

Unemployment Compensation
Base: $12,000
Rates: 0.65% - 7.2%
New Employers: 3.35% generally

Source: All States Tax Handbook, 2010