Taxes are 8 percent, plus 8 percent plus a set amount per gallon that adds up to about $0.56 per gallon.
What makes California gas so expensive though is that the state requires a special blend not used in any other Western state (or perhaps anywhere) and much of the gasoline is piped in.
So mostly it is a supply problem in the old supply and demand scenario.
And the state loves the higher prices because they get more tax revenue (8 percent of a higher number is good to them).
See my #36. It’s up to $0.586 per gallon. So it’s taxes, special forumlations, and lack of local refining capacity, for the main causes.