Californians stand to pay huge health care increases next year thanks to ObamaCare. Raise your hand if you’re surprised. Yeah, me either.

If you’re a 25 year old male non-smoker, buying insurance for yourself, the cheapest plan on Obamacare’s exchanges is the catastrophic plan, which costs an average of $184 a month. (By “average,” I mean the median monthly premium across California’s 19 insurance rating regions.)

The next cheapest plan, the “bronze” comprehensive plan, costs $205 a month. But in 2013, on eHealthInsurance.com (NASDAQ:EHTH), the median cost of the five cheapest plans was only $92.

In other words, for the typical 25-year-old male non-smoking Californian, Obamacare will drive premiums up by between 100 and 123 percent.

Under Obamacare, only people under the age of 30 can participate in the slightly cheaper catastrophic plan. So if you’re 40, your cheapest option is the bronze plan. In California, the median price of a bronze plan for a 40-year-old male non-smoker will be $261.

But on eHealthInsurance, the median cost of the five cheapest plans was $121. That is, Obamacare will increase individual-market premiums by an average of 116 percent.

For both 25-year-olds and 40-year-olds, then, Californians under Obamacare who buy insurance for themselves will see their insurance premiums double.

ObamaCare: Even if you like your money, you can’t keep it.