At later stages in Evony you probably want to have a very low tax rate. You want to have as high a loyalty as possible in case you get attacked. Every time you are attacked your loyalty will go down. Being attacked reduces your loyalty and can cause riots in your city if your loyalty drops too low. You also want a high loyalty because you want to have a lot of idle population. A large idle population allows you to create a lot of troops quickly as the amount of troops you can create is based on your idle population. Remember gold becomes very easy to get later in the game so you don’t need to have as high of a tax rate. In fact I sometimes run cities with 0 tax rate at later stages of the game.
VN:F [1.9.7_1111]Best Tax Rate for later stages of the game,