St. Louis is 52% cheaper than McKinney.
When comparing St. Louis, MO and McKinney, TX, the overall cost of living indices are 66 and 138 respectively (national median = 100). Rent is $863/month cheaper in St. Louis, saving renters about $10,356/year.
Median household income is $64,994/year higher in McKinney. Home values also differ significantly — the median in St. Louis is $185,100 compared to $439,500 in McKinney.
Texas has no state income tax, giving McKinney residents a significant tax advantage over Missouri's 4.95% rate.
St. Louis vs McKinney — common questions
Other cost of living comparisons for St. Louis and McKinney