What It Really Costs to Maintain a 56 PCI City vs. an 85 PCI City

In the last post, we used a 71 PCI city as our "average" example, since most cities land somewhere in the 70s, and found that moving the needle even one point took real money. But what happens at the extremes? What does the math look like for a city starting well below average or one sitting comfortably above it? Let's run the numbers.