Garland is 25% cheaper than Richardson.
When comparing Garland, TX and Richardson, TX, the overall cost of living indices are 96 and 128 respectively (national median = 100). Rent is $300/month cheaper in Garland, saving renters about $3,600/year.
Median household income is $21,540/year higher in Richardson. Home values also differ significantly — the median in Garland is $248,900 compared to $405,600 in Richardson.
Both cities share the same state tax structure since they are in Texas.
Garland vs Richardson — common questions
Other cost of living comparisons for Garland and Richardson