Irvine is 100% more expensive than Richardson.
When comparing Irvine, CA and Richardson, TX, the overall cost of living indices are 256 and 128 respectively (national median = 100). Rent is $1,068/month cheaper in Richardson, saving renters about $12,816/year.
Median household income is $33,390/year higher in Irvine. Home values also differ significantly — the median in Irvine is $1,115,400 compared to $405,600 in Richardson.
Texas has no state income tax, giving Richardson residents a significant tax advantage over California's 13.3% rate.
Irvine vs Richardson — common questions
Other cost of living comparisons for Irvine and Richardson