Software Developer Salary in Illinois: Cost of Living Adjusted (2024)

What does a Software Developer salary really buy you in Illinois?

Illinois is near the US average cost of living

Data: BLS OEWS 2024 + BEA Regional Price Parities 2022 • Updated 2026-03-31

Nominal Salary

$127,770

Median annual (2024)

→ -1.3%

Real Purchasing Power

$126,130

COL-adjusted (RPP=101.3)

Illinois Cost of Living Index

Illinois's Regional Price Parity (RPP) is 101.3, meaning prices are 1.3% higher the national average. A Software Developer earning $127,770 in Illinois has the equivalent purchasing power of $126,130 in an average-cost US state.

IL: 101.3

Cheapest (~85) US Avg (100) Priciest (~115)

Salary Breakdown: Nominal vs. COL-Adjusted

Every dollar goes further in low-cost states. Here is how each salary percentile compares after adjusting for Illinois's cost of living.

Percentile	Nominal Salary	COL-Adjusted	Difference
10th Percentile (P10)	$75,450	$74,481	$-968
25th Percentile (P25)	$98,800	$97,532	$-1,267
Median (P50)	$127,770	$126,130	$-1,639
75th Percentile (P75)	$159,280	$157,235	$-2,044
90th Percentile (P90)	$172,020	$169,812	$-2,207

Key Insight

Illinois's cost of living is close to the national average, so $127,770 keeps most of its value at $126,130 in real terms. Location choice here is more about career opportunities than cost arbitrage.

Best States for Software Developer (After Cost of Living)

Where does Software Developer salary stretch the furthest? Top 10 states ranked by COL-adjusted median salary.

1. Washington

$152,012

RPP 109.8

2. California

$151,920

RPP 112.5

3. New York

$149,869

RPP 107.6

4. North Carolina

$139,065

RPP 94.2

5. Delaware

$137,918

RPP 98.0

6. Massachusetts

$137,586

RPP 109.4

7. Utah

$134,804

RPP 94.5

8. Georgia

$134,572

RPP 95.8

9. Nevada

$133,848

RPP 96.4

10. Texas

$133,846

RPP 97.5

Illinois ranks #23 out of 50 states for Software Developer after cost-of-living adjustment.

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Frequently Asked Questions

What is the real salary for a Software Developer in Illinois after cost of living?

A Software Developer in Illinois earns a median salary of $127,770 per year. After adjusting for Illinois's cost of living (RPP=101.3), the real purchasing power is $126,130 — a -1.3% difference.

Is Illinois expensive to live in?

Illinois's cost of living is 1.3% higher than the national average according to the BEA Regional Price Parities (2022). The RPP index for Illinois is 101.3 (US average = 100).

What are Regional Price Parities (RPP)?

Regional Price Parities (RPPs) are price indexes published by the U.S. Bureau of Economic Analysis (BEA) that measure differences in price levels across states. They are expressed as a percentage of the national average (US = 100). Higher RPP means higher cost of living.

How is the cost-of-living adjusted salary calculated?

The adjusted salary is calculated as: Nominal Salary x (100 / RPP). For a Software Developer in Illinois: $127,770 x (100 / 101.3) = $126,130. This represents what the salary would be worth in a state with average living costs.