McKinney is 126% more expensive than Springfield.
When comparing McKinney, TX and Springfield, IL, the overall cost of living indices are 138 and 61 respectively (national median = 100). Rent is $896/month cheaper in Springfield, saving renters about $10,752/year.
Median household income is $54,736/year higher in McKinney. Home values also differ significantly — the median in McKinney is $439,500 compared to $155,200 in Springfield.
Texas has no state income tax, giving McKinney residents a significant tax advantage over Illinois's 4.95% rate.
McKinney vs Springfield — common questions
Other cost of living comparisons for McKinney and Springfield