15. El Paso, Texas
Increase in Cost to Live Comfortably: $9,756.80
Percentage Increase in Cost to Live Comfortably: 24.15 percent
El Paso is among the 20 cities where costs are rising the fastest, but it also boasts the lowest cost to live comfortably at just over $50,000 a year. Still, the increase makes El Paso one of the cities where retirees are struggling to get buy.