City Cash

 is the main currency in Bloons Monkey City. It is used to build and upgrade buildings and research new bloon types and upgrades.

At the start of the game, the player has a maximum capacity of City Cash of 1500, but it can be increased by upgrading or building Money Banks. However, it is possible to go over that capacity by conquering tiles.

There are various ways of obtaining it: By conquering tiles, collecting from Banana Farms, by raiding other players and by completing quests.