A Data Scientist earning $80K/year in Illinois takes home $61,095 after all taxes. That’s $5,091/month, with an effective tax rate of 23.6%.
The estimated median salary for Data Scientists in Illinois is $107K (adjusted from the national median of $115K using Illinois’s cost-of-living index of 93). At $80K, you’re earning 25% below the state-adjusted median for this profession.
You’re earning slightly below the state-adjusted median, which is common for mid-career Data Scientists or those in lower-cost areas within Illinois. The salary range for Data Scientists nationally is 75K–180K, so there’s room for growth as you gain experience and specialization.
Filing as married filing jointly on $80K (single earner) saves you $3,585/year ($299/month) compared to filing single. This marriage bonus comes from the doubled standard deduction ($32,200 vs $16,100) and wider lower brackets.
Data scientists often receive significant equity compensation, especially at tech companies. RSU vesting creates lumpy income that can push you into higher brackets in certain years. Conference speaking fees and consulting income on the side are common in this field and must be reported as self-employment income. If you publish research or create open-source tools, any related expenses may be deductible as unreimbursed business expenses. Consider tax-loss harvesting on personal investments to offset gains from equity compensation.
At #35 out of 50 states for take-home pay on a $80K salary, Illinois is in the bottom half for take-home pay. You’d keep $3,960 more per year in Alaska (#1), or $330/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.