Charleston and Richardson have a similar cost of living.
When comparing Charleston, SC and Richardson, TX, the overall cost of living indices are 128 and 128 respectively (national median = 100). Rent is $193/month cheaper in Charleston, saving renters about $2,316/year.
Median household income is $6,219/year higher in Richardson. Home values also differ significantly — the median in Charleston is $469,100 compared to $405,600 in Richardson.
Texas has no state income tax, giving Richardson residents a significant tax advantage over South Carolina's 6.4% rate.
Charleston vs Richardson — common questions
Other cost of living comparisons for Charleston and Richardson