State comparison · 2025
Software Developers salary: Illinois vs Washington
Software Developers in Washington earn a median of $166,540. In Illinois, $132,110. After cost-of-living, the gap is 15.1% — not 20.7%.
Nominal pay gap
-20.7%
Illinois vs Washington
COL-adjusted gap
-15.1%
After BEA Regional Price Parities
Illinois
Software Developers
- Median
- $132,110
- p25
- $101,540
- p75
- $166,420
- p10
- $80,980
- p90
- $194,740
- COL index (BEA RPP)100 = US average
- 100.0
- Hiring velocity (180d)
- -43%
Washington
Software Developers
- Median
- $166,540
- p25
- $132,290
- p75
- $211,860
- p10
- $96,810
- p90
- $255,350
- COL index (BEA RPP)100 = US average
- 107.0
- Hiring velocity (180d)
- 0%
BLS Occupational Employment and Wage Statistics, May 2025. Cost-of-living adjustment from BEA Regional Price Parities (overall index). Hiring velocity from DOL OFLC public disclosure data, recent 180 days vs prior. See methodology.