Side-by-side comparison of income tax, property tax, sales tax, capital gains, and retirement treatment between Wisconsin and Illinois for tax year 2026. Use the calculator below to estimate how much you would save (or pay) after relocating.
| Tax | Wisconsin | Illinois |
|---|---|---|
| State income tax (effective) | 5.30% | 4.95% |
| Long-term capital gains | 5.30% | 4.95% |
| Property tax (effective) | 1.68% | 2.27% |
| Combined sales tax | 5.44% | 8.88% |
| Retirement income | partial-exempt | fully-taxable |
| Income system | progressive | flat |
Wisconsin total tax
$20,612
Illinois total tax
$20,266
Wisconsin state tax
$5,242
Illinois state tax
$4,896
Difference
−$346
Illinois saves you money
As % of income
0.29%
Federal tax is identical in both columns and excluded from the difference. Numbers use 2026 IRS brackets, state effective rates, and the 3.8% NIIT where applicable.
Moving from Wisconsin to Illinois could save about $346 per year on this profile — roughly 0.29% of gross income.
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