McKinney and Thornton have a similar cost of living.
When comparing McKinney, TX and Thornton, CO, the overall cost of living indices are 138 and 138 respectively (national median = 100). Rent is comparable in both cities, with less than $50/month separating them.
Median household income is $19,288/year higher in McKinney. Home values also differ significantly — the median in McKinney is $439,500 compared to $482,200 in Thornton.
Texas has no state income tax, giving McKinney residents a significant tax advantage over Colorado's 4.4% rate.
McKinney vs Thornton — common questions
Other cost of living comparisons for McKinney and Thornton