Tax burden is best measured as a % of personal income, since states vary widely in average income.
According to the Tax Foundation, CAs average tax burden, including state & local taxes is 10.5%, vs. a national average of 9.9%. That % is a remarkably tight clustering, but don’t forget that income variance state to state adds to the disparity. For instance, Connecticutt income a lot higher than Mississippi’s.
Our ranking is 6th highest among the states. We are not undertaxed.