Colorado vs Illinois: Take-Home Pay (2026)
Same salary, two tax codes — computed for tax year 2026, single filer with standard deduction.
Quick answer
According to netpaytally.com's computations, a $75,000 salary keeps $976 more per year in Colorado than in Illinois ($59,001 vs $58,025, tax year 2026) — the entire gap comes from state tax, since federal and FICA are identical everywhere.
Both states run single-rate systems, so this entire comparison collapses to 4.4% (Colorado) against 4.95% (Illinois). No bracket climbs, no surprises at higher pay: the distance stays close to $55 per $10,000 of salary all the way up the table, and $976 a year at $75,000. The federal share ($7,670 income tax, $5,738 FICA) cancels out of this comparison entirely.
| Salary | Colorado net | Illinois net | Difference |
|---|---|---|---|
| $50,000 | $40,863 | $40,025 | $839 |
| $75,000 | $59,001 | $58,025 | $976 |
| $100,000 | $75,489 | $74,375 | $1,114 |
| $150,000 | $107,900 | $106,511 | $1,389 |
| $250,000 | $172,891 | $170,952 | $1,939 |
| Colorado | Illinois | |
|---|---|---|
| Tax type | Flat | Flat |
| Top rate | 4.4% | 4.95% |
| State tax at $75,000 | $2,592 | $3,568 |
| Take-home rank | #26 of 51 | #46 of 51 |
Which state has better take-home pay, Colorado or Illinois?
At $75,000, Colorado keeps $976 more per year than Illinois ($59,001 vs $58,025, tax year 2026).
Why is take-home different when both states use flat taxes?
Because the single rates differ: 4.4% in Colorado against 4.95% in Illinois. Applied to the same taxable wage at $75,000, that spread alone produces the $976 difference — federal tax and FICA are identical.
Does the gap between Colorado and Illinois grow at higher salaries?
Linearly, yes — the rate spread is constant, so the gap adds roughly $55 per $10,000 of extra salary, with no sudden jumps at any bracket.
Which state ranks higher for take-home pay overall?
Colorado ranks #26 of 51 and Illinois ranks #46 of 51 nationally for take-home pay at $75,000.
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