A Software Engineer earning $120K/year in Illinois takes home $87,255 after all taxes. That’s $7,271/month, with an effective tax rate of 27.3%.
The estimated median salary for Software Engineers in Illinois is $112K (adjusted from the national median of $120K using Illinois’s cost-of-living index of 93). At $120K, you’re earning 7% above the state-adjusted median for this profession.
You’re earning above the median, suggesting you’ve moved beyond entry-level. As your career progresses, each raise will be taxed at your marginal rate, so understanding your bracket position helps you evaluate the true value of promotions and raises.
Filing as married filing jointly on $120K (single earner) saves you $7,585/year ($632/month) compared to filing single. This marriage bonus comes from the doubled standard deduction ($32,200 vs $16,100) and wider lower brackets.
Software engineers frequently receive compensation in the form of restricted stock units (RSUs) and stock options. When RSUs vest, they’re taxed as ordinary income at your marginal rate, which can push you into a higher bracket during vest years. If you exercise incentive stock options (ISOs), the spread between strike and market price may trigger Alternative Minimum Tax (AMT). Consider spreading option exercises across multiple tax years to minimize bracket creep. Many engineers also benefit from the home office deduction if working remotely.
At #35 out of 50 states for take-home pay on a $120K salary, Illinois is in the bottom half for take-home pay. You’d keep $5,940 more per year in Alaska (#1), or $495/month.
After adjusting for cost of living, Illinois ranks #22 in purchasing power. That’s a boost from #35 in raw take-home — Illinois’s lower costs stretch your paycheck further.