Washington is 33% more expensive than Miami.
When comparing Washington, DC and Miami, FL, the overall cost of living indices are 171 and 129 respectively (national median = 100). Rent is $243/month cheaper in Miami, saving renters about $2,916/year.
Median household income is $46,897/year higher in Washington. Home values also differ significantly — the median in Washington is $724,600 compared to $475,200 in Miami.
Florida has no state income tax, giving Miami residents a significant tax advantage over District of Columbia's 10.75% rate.
Washington vs Miami — common questions
Other cost of living comparisons for Washington and Miami