The median household income in California is $84,900. Saving 15% of that comes to $1,061 per month. Over 5 years in a high-yield savings account at 4.65%, that grows to $71,531, including interest.
A fully-funded 6-month emergency fund in California requires $42,450 based on median income. At a 15% savings rate, that target takes 38 months to reach. This is the single most important financial buffer you can build.
If a home purchase is your goal, a 20% down payment on the California median home of $785,000 requires $157,000. At 15% savings rate, that takes 118 months.
California has a state income tax of 1%–13.3%. Your actual take-home monthly is lower than the gross figures above. Adjust your savings contribution to your net income for more accurate timelines.